Tag: Children

Is Lead Poisoning Reversible? Recovery, Timelines and What Lasts

Lead poisoning is partly reversible. Once exposure stops, the amount of lead in the blood goes down, but lead stored in the bones can stay for decades, and the CDC says some effects of lead poisoning “can be permanent and disabling,” especially on a child’s developing brain.

Early intervention specialist playing a learning game with a toddler and parent

In short: you can recover in the sense that blood lead levels fall once the source is found and removed. ATSDR, the CDC’s toxic-substances agency, estimates the half-life of lead in adult blood at 28 to 36 days, about a month, while lead in bone has an apparent half-time of one to two decades. Damage that has already happened, such as effects on learning and IQ, may not reverse, which is why the CDC focuses on stopping exposure early and on support services for children. There is no home treatment or detox. If you are worried, call your doctor, your local health department or Poison Control at 1-800-222-1222.

This page sums up what the CDC, ATSDR, NIEHS and the World Health Organization publish. It is not medical advice; only a provider who knows the person can say what to expect.

What “recovery” from lead poisoning means

Recovery means two things: will the lead leave the body, and will the effects go away? Official sources answer them separately.

For the lead itself, the answer is mostly yes, slowly. ATSDR’s course for doctors says repeat blood tests are used “to verify the decline in BLL after lead sources have been reduced or eliminated.” A falling blood lead level is the main sign of recovery. How fast it falls depends on how high the level was, how long the exposure lasted, the person’s age, and how much lead has built up in the bones.

For the harm, the answer is less certain. NIEHS states that “many effects are permanent,” and official sources do not promise that any specific effect will reverse. Our guide to the effects of lead poisoning lists what each agency describes, and our lead poisoning hub covers the basics.

How long does lead stay in your body?

ATSDR describes three places lead goes: blood, soft tissues, and bones and teeth. The bones and teeth of adults hold about 94% of the body’s lead; in children, the figure is about 73%. Lead leaves the blood much faster than it leaves the bone, and bone can feed lead back into the blood for years. ATSDR’s 2020 Toxicological Profile for Lead puts it plainly: lead “is retained in the body for decades.”

The published timeframes below are averages and ranges from studies, not a forecast for any one person.

Timeframe	What happens	Source
About a month (28 to 36 days)	Estimated half-life of lead in adult blood: roughly half of the lead in the blood is gone in that time, if no new lead comes in and bone does not add more.	ATSDR, Case Studies in Environmental Medicine: Lead Toxicity
1 week to 2 years	The apparent half-time of lead in blood “varies with age and exposure history.” Long or heavy exposure builds bone stores that slow the decline.	ATSDR Toxicological Profile for Lead (2020)
8 to 38 months	Apparent blood half-times estimated in one study of children exposed at ages 2 to 3. ATSDR notes these include lead moving from bone back into blood.	ATSDR Toxicological Profile for Lead (2020), citing Manton et al. 2000
2 weeks to 9 months between tests	The CDC’s follow-up blood test schedule for children, set by the confirmed level: higher levels are checked sooner.	CDC, Recommended Actions Based on Blood Lead Level
1 to 2 decades	Apparent half-time for elimination of lead from bone.	ATSDR Toxicological Profile for Lead (2020)
Several decades	One part of bone lead is “essentially inert,” with an elimination half-time of several decades; ATSDR’s course says it “stores lead for decades.”	ATSDR Toxicological Profile (2020); ATSDR Case Studies in Environmental Medicine
Years later	Stored bone lead can return to the blood during pregnancy, breastfeeding, menopause, broken bones, long bed rest, kidney disease and older age.	ATSDR Case Studies in Environmental Medicine; CDC, Risk Factors and Pregnancy
Possibly lifelong	Some effects, such as on a child’s brain development and IQ, can be permanent.	CDC; NIEHS; WHO

So how long does lead poisoning last? No official source gives a single answer. A level built up over years comes down more slowly than one from a short exposure, because bone keeps releasing lead. In one study of retired lead workers cited by ATSDR, about half of the blood lead decline had a half-time of 13 years.

Lead stored in bone can come back

Because so much lead is stored in bone, a person can have lead in their blood long after the original source is gone. ATSDR calls this inert pool “a potential endogenous source of lead that can maintain BLLs long after exposure has ended.” Release increases with pregnancy, breastfeeding, menopause, advanced age, broken bones, being bedridden, kidney disease and some other conditions, and ATSDR says calcium deficiency makes it worse.

Pregnancy matters most here. The CDC says “the lead stored in the bones of adults can be released into the blood during pregnancy,” and WHO says this lead “becomes a source of exposure to the developing fetus.” If you are pregnant or planning a pregnancy and think you were exposed in the past, tell your health care provider.

This is also why a child’s level can rise again. ATSDR lists four reasons for a rising level: a source no one has found yet, abatement work that was not done properly, a known hazard that was not controlled, or lead stored in the child’s body moving back into the blood.

Which effects may be permanent, and what can improve

Official sources are direct about the permanent side. The CDC says “the effects of lead poisoning can be permanent and disabling” and that there are no safe levels of lead in the blood. WHO says lead “can permanently affect children’s brain development, resulting in reduced intelligence quotient (IQ),” along with shorter attention span and lower educational attainment, and that children who survive severe poisoning “may be left with permanent intellectual disability and behavioural disorders.”

What improves is the level of lead in the body. Stopping exposure prevents more damage, and that is the part families and health departments can control. For children, the CDC also points to services that help a child learn and develop, covered below; they support the child rather than undo effects.

Why removing the source is the most important step

A blood lead level cannot fall for long while new lead keeps coming in. That is why “finding and removing lead from the child’s environment” comes first in the CDC’s list of follow-up services, and why ATSDR tells doctors to start a prompt investigation for the source. Above the CDC reference value of 3.5 µg/dL, providers report the result to the health department, which may arrange a home investigation; the rules vary by state or city.

Common sources include deteriorating paint and the dust it makes in homes built before 1978, water from lead pipes, bare soil, lead brought home on work clothes, and some imported spices, remedies, cosmetics and pottery. See lead poisoning causes and prevention, or try our free home lead risk checker. Do not sand or scrape old paint yourself; that makes more lead dust.

Follow-up blood tests: how recovery is tracked

The only way to see recovery is repeat blood tests. For children, the CDC sets the timing by the confirmed (venous) level: early follow-up in 3 months for 3.5 to 9 µg/dL, 1 to 3 months for 10 to 19, 2 weeks to 1 month for 20 to 44, and as soon as possible for 45 or higher. Once levels are falling, the gaps get longer, up to 6 to 9 months. The full table is on our blood lead levels page.

Support for children: early intervention and school services

Because some effects can last, the CDC’s follow-up for children goes beyond the blood test. The CDC tells parents that a doctor “may also recommend connecting the child to early educational services.” Its guidance for providers says to check that the child is meeting developmental milestones and to refer families to supportive services as needed, such as developmental specialists and the Early Intervention Program.

A 2015 CDC expert panel report, Educational Interventions for Children Affected by Lead, notes there are no studies specifically on early educational interventions for lead-exposed children, but that children with or at high risk of developmental delays benefit most from interventions that start early. It calls for streamlined access to developmental assessment, intervention and special education services, and for consistent use of the Individuals with Disabilities Education Act (IDEA). Ask your child’s doctor about a developmental evaluation, and tell the school about the exposure. Our guide to lead and children has more on prevention and screening.

Nutrition: what the CDC says

The CDC’s wording on food is short. For children above the reference value, its follow-up services include “feeding the child a diet high in iron and calcium.” Its prevention advice for families says “a balanced diet with foods that provide calcium, iron, and vitamin C may help keep lead out of the body,” and notes that many of these foods can be bought through food assistance programs such as WIC.

A good diet supports the body; it does not remove stored lead and is not a treatment. Do not give supplements for lead unless your own or your child’s doctor tells you to.

Medical treatment at high levels

At very high blood lead levels, doctors may use chelation therapy, which the CDC describes as “a medical treatment used to remove lead from the body.” The CDC’s provider guidance places it at 45 µg/dL and above, decided with a medical toxicologist or a pediatrician experienced in lead poisoning, and ATSDR says chelation is not risk free. It lowers the lead load; it is not described by official sources as reversing damage already done. Our lead poisoning treatment guide explains the CDC’s actions at each level, and which doctor treats lead poisoning explains who to see.

Products sold online as lead “detox” or home chelation are not the same thing, and no official source we use recommends them.

Adults

Most adults with high blood lead were exposed at work, according to NIEHS, in jobs such as construction, mining, welding and battery manufacturing. Blood lead falls after exposure ends, more slowly after years of exposure. If you work with lead, tell your doctor.

Who to call

911 for severe symptoms such as a seizure, collapse or trouble breathing.
Poison Control, 1-800-222-1222, free and around the clock, if you think someone swallowed lead or you have urgent questions.
Your doctor or your child’s pediatrician for blood lead tests, follow-up and referrals.
Your local health department for case management and home investigations.

Frequently asked questions

Is lead poisoning reversible?

Partly. Blood lead levels come down once exposure stops, but lead stored in bone can stay for decades, and the CDC says some effects can be permanent. Stopping exposure early limits the harm.

Can you recover from lead poisoning?

Blood lead levels fall after the source is removed, tracked with repeat tests. Whether effects on learning or health improve varies; official sources describe some as permanent.

How long does lead poisoning last?

There is no single timeline. ATSDR estimates the half-life of lead in adult blood at about a month, but levels built up over years fall more slowly because bone keeps releasing lead. The CDC schedules children’s follow-up tests 2 weeks to 9 months apart depending on the level.

How long does lead stay in your body?

In the blood, weeks to months; in bone, years to decades. ATSDR gives an apparent half-time of one to two decades for lead in bone, and says part of it is stored for several decades.

Can lead come back years later?

Yes. ATSDR says bone lead can move back into the blood during pregnancy, breastfeeding, menopause, after a broken bone or with older age.

October 10, 2026

Can Lead Poisoning Kill You? Lead Poisoning Statistics and Deaths

Yes, lead poisoning can kill, but in the United States today it almost never does so quickly. The World Health Organization says lead exposure was linked to more than 3.5 million deaths worldwide in 2023, mostly through its effects on the heart and blood vessels after years of exposure, while sudden deaths from very high levels, usually in young children who swallowed something made of lead, are rare in the US and are reported as individual cases.

Public health lab technician handling blood sample tubes

In short: most lead-related deaths come from long-term, lower-level exposure that raises blood pressure and the risk of heart disease in adults. Fast, fatal poisoning is rare in the US but has happened, for example in a 4-year-old who swallowed a lead charm in 2006. Lead levels in US children have fallen by about 96% since the late 1970s, yet millions of homes still have lead paint hazards and about 4 million lead water pipes remain in the ground. No safe blood lead level is known, so prevention and testing still matter. For a possible poisoning, call Poison Control at 1-800-222-1222, or 911 in an emergency.

This page gathers public statistics from health and housing agencies and one peer-reviewed study. It is not medical advice. Talk to a doctor or your local health department about your own situation.

Can lead poisoning kill you?

It can, in two very different ways.

Slowly, through the heart and blood vessels. This is where most lead-related deaths come from. The WHO says lead contributes to high blood pressure, heart and blood vessel problems and kidney damage in adults. Over many years that raises the chance of dying from a heart attack or stroke.
Quickly, from a very high dose. A large amount of lead in a short time, for example from a swallowed lead object, can cause serious brain injury (lead encephalopathy) and death. In the US this is now rare.

So the honest answer to “can lead poisoning kill you” is yes, but the main danger for most people is quiet and long-term, not sudden. More in our guide to the effects of lead poisoning.

Lead poisoning statistics at a glance

Each figure below was checked on its source on October 10, 2026.

Statistic	What it means	Source	Year
More than 3.5 million deaths worldwide attributed to lead exposure	Mostly heart and blood vessel deaths after long exposure; an estimate, not a count of death certificates	WHO fact sheet (IHME Global Burden of Disease)	2023
More than 71.5 million disability-adjusted life years (DALYs) lost worldwide	Years of healthy life lost to illness, disability and early death linked to lead	WHO fact sheet (IHME)	2023
Lead is one of 10 chemicals of major public health concern	WHO asks countries to act to protect workers, children and women of reproductive age	WHO fact sheet	2026 (fact sheet date)
About 412,000 US deaths a year attributable to lead (18% of all deaths)	A research estimate for adults exposed in 1988–1994 and followed to 2011; not a CDC figure	Lanphear et al., The Lancet Public Health	2018 (published)
About 256,000 of those were cardiovascular deaths	Same study; shows the main pathway is heart and blood vessel disease	Lanphear et al., The Lancet Public Health	2018 (published)
Median blood lead in US children ages 1–5: 0.6 µg/dL, down 96% since 1976–1980	The typical child today has far less lead in their blood than a child in the late 1970s	EPA, America’s Children and the Environment	2017–2020
95th percentile blood lead in US children ages 1–5: about 2 µg/dL, down 93% since 1976–1980	Even the most exposed 5% of children have much lower levels than in the past	EPA, America’s Children and the Environment	2017–2020
CDC blood lead reference value: 3.5 µg/dL (the 97.5th percentile)	About 1 in 40 US children ages 1–5 were at or above this level in the survey data it was based on	CDC	2021 (NHANES 2015–2018 data)
About 4 million lead service lines in the US (3 million reported plus 1 million unknown predicted to be lead)	Pipes that can carry lead into tap water still serve millions of homes	EPA, 7th Drinking Water Infrastructure Needs Survey update	2025
About three-quarters of US homes built before 1978 still contain some lead-based paint	Paint in good condition is lower risk; peeling paint and dust are the problem	EPA	Page updated 2026
34.6 million homes (29.4%) have lead-based paint	Nearly 3 in 10 US homes have lead paint somewhere	HUD, American Healthy Homes Survey II	2018–2019
29 million homes (24.6%) have at least one lead-based paint hazard	Hazard means deteriorated lead paint, or lead in dust or bare soil above federal limits	HUD, American Healthy Homes Survey II	2018–2019
3.3 million homes with a lead hazard have a child under 6	The homes where young children face the highest risk from lead dust	HUD, American Healthy Homes Survey II	2018–2019
About 90% of adults with blood lead of 10 µg/dL or more (known source) were exposed at work	In adults, high lead levels are mostly a workplace issue	CDC/NIOSH Adult Blood Lead Epidemiology and Surveillance (ABLES)	Page dated 2024

Lead poisoning deaths: what the numbers really say

The WHO figure: 3.5 million deaths worldwide

The WHO’s lead fact sheet, dated June 10, 2026, cites the Institute for Health Metrics and Evaluation (IHME): more than 3.5 million deaths globally in 2023 were attributed to lead exposure, “primarily due to cardiovascular effects.” It is a modeled estimate, not a tally of death certificates that say lead poisoning.

The US estimate: about 412,000 deaths a year

A 2018 study in The Lancet Public Health by Bruce Lanphear and colleagues followed 14,289 US adults whose blood lead was measured in a national survey from 1988 to 1994, and linked them to death records through 2011. The researchers estimated that 18% of all deaths, equivalent to about 412,000 a year, could be attributed to lead, including about 256,000 cardiovascular deaths and 185,000 deaths from ischemic heart disease.

This is a peer-reviewed research estimate, not an official CDC count. It is also based on blood lead levels from the late 1980s and early 1990s, when the average adult level in the study was 2.71 µg/dL; lead levels have fallen a great deal since, as the children’s data below show. It shows how large the long-term effect may be, not today’s yearly toll.

Is there an official US count?

We could not find a current CDC or NCHS page that publishes a national yearly count of deaths from lead poisoning, so we do not quote one. A heart attack in someone with years of exposure is not recorded as lead poisoning.

Fatal lead poisoning in children is rare, but it has happened

In a 2001 report the CDC called fatal lead poisoning in US children rare, crediting public health measures. Two cases published in its Morbidity and Mortality Weekly Report (MMWR):

New Hampshire, 2000. A 2-year-old girl who had arrived three weeks earlier with her refugee family died with a blood lead level of 391 µg/dL. The CDC called it the first reported death of a child from lead poisoning since 1990, and the investigation pointed to lead paint and dust in the home.
Minnesota, 2006. A 4-year-old boy died of lead encephalopathy after swallowing a heart-shaped charm that tested at 99.1% lead. It came on a bracelet given free with a pair of shoes; his blood lead level was 180 µg/dL. The bracelets were recalled.

For comparison, the CDC’s reference value for children is 3.5 µg/dL, so these children had levels more than 50 times higher. Keep small metal jewelry and charms away from young children; see lead and children. If a child may have swallowed a metal object, call Poison Control at 1-800-222-1222 right away, or 911 for severe symptoms such as a seizure.

How common is lead poisoning in the US?

It depends on what you count, because no level of lead is known to be safe.

Children: much lower than before, but not zero

The EPA’s America’s Children and the Environment report shows the median blood lead level of US children ages 1 to 5 fell to 0.6 µg/dL in 2017–2020, a 96% decrease since 1976–1980. The biggest drop followed the removal of lead from gasoline. The median was higher for children in families below the poverty level (0.8 µg/dL) than for other children (0.6 µg/dL).

What “1 in 40” means

The CDC’s blood lead reference value of 3.5 µg/dL was set at the 97.5th percentile of blood lead in US children ages 1 to 5, using national survey data from 2015 to 2018. By definition, that means about 2.5% of young children, roughly 1 in 40, were at or above 3.5 µg/dL in that survey. It does not mean children below 3.5 are safe. The CDC says the value is a screening tool to find children with more lead than most, and it is not health-based. Our guide to blood lead levels explains the numbers in more detail.

Why there is no single national case count

States report blood lead tests to the CDC, and the CDC publishes those tables for 2017–2022. But the CDC itself warns that this data is not a population-based estimate, is not representative of the US or even of a whole state, and cannot be compared accurately between states because testing and case definitions differ.

Adults: mostly a workplace issue

The CDC’s National Institute for Occupational Safety and Health (NIOSH) tracks adults with blood lead of 10 µg/dL or more through its ABLES program. Among adults at that level whose source was known, about 90% were exposed at work, and the National Institute of Environmental Health Sciences (NIEHS) names jobs such as mining, construction, welding and battery manufacturing. See lead poisoning in adults for more.

Where the risk still comes from

Old paint and dust. The EPA says about three-quarters of US homes built before 1978 still contain some lead-based paint. HUD’s American Healthy Homes Survey II, done in 2018–2019, found lead-based paint in 34.6 million homes and at least one lead-based paint hazard in 29 million. About 3.3 million homes with a hazard had a child under 6 living there.
Water pipes. The EPA estimated in its November 2025 update that about 4 million lead service lines remain across the country. Read more in our guide to lead pipes.
Jobs and hobbies. Most adults with high blood lead were exposed at work.
Products. The CDC lists some imported candies, traditional medicines, toys and jewelry as sources.

What these statistics mean for you

Three practical steps, in line with CDC, EPA and HUD advice:

Test people, not guesses. Most children with lead in their blood have no obvious symptoms; the CDC calls a blood test the best way to know. Ask your doctor; our guide to the lead poisoning test explains how it works.
Find the source. In a pre-1978 home or one with a possible lead service line, testing paint, dust and water shows where lead is.
Get help early. Ask your doctor or local health department.

For risks, sources and who to call, see our lead poisoning guide.

Frequently asked questions

Can lead poisoning kill you?

Yes. Very high levels can cause serious brain injury and death, which is rare in the US today. Far more often, years of exposure raise blood pressure and the risk of heart disease, and the WHO links more than 3.5 million deaths worldwide in 2023 to lead, mostly through the heart and blood vessels.

How many people die from lead poisoning in the US each year?

We found no official yearly count. A 2018 peer-reviewed study estimated about 412,000 deaths a year attributable to lead, mostly from heart disease, in adults exposed in 1988–1994.

How common is lead poisoning in children?

Much less common than in the past: the median level in children ages 1 to 5 fell 96% since 1976–1980. No safe level is known, so ask your child’s doctor about testing.

October 10, 2026

Lead Screening for Children: When and How Kids Are Tested

Lead screening for children happens at regular checkups: the doctor asks a few questions about lead risks, and many children also get a small blood test at 1 and 2 years old. Children on Medicaid must have that blood test at 12 and 24 months, and a growing number of states now require it for every child.

Parent filling in a clipboard form in a clinic waiting room with a toddler beside them

In short: the American Academy of Pediatrics (AAP) schedule calls for a lead risk assessment at the 6, 9, 12, 18 and 24 month visits and every year from age 3 to 6. Federal Medicaid rules require blood lead tests at 12 and 24 months, plus a test between 24 and 72 months for any child never tested, and a questionnaire alone does not count. States such as Illinois, Michigan, New York and Massachusetts require blood tests for all young children. The test is usually a finger or heel stick. Ask your pediatrician, your local health department or your WIC office which tests your child is due for.

This guide summarizes official guidance and is not medical advice. If you think your child swallowed something with lead in it, call Poison Control at 1-800-222-1222, and call 911 for severe symptoms.

Why children are screened even when they seem healthy

Most children with lead in their blood have no obvious symptoms, and the CDC says all children at risk for lead exposure should be tested. The CDC says children younger than 6 are more likely to be exposed because of their hand-to-mouth behavior. Our lead and children guide explains why young children are most at risk, and lead poisoning symptoms covers the signs that can appear.

“Screening” covers two different things:

Risk assessment: a short set of questions the doctor or nurse asks you about your home, family and habits. No needle involved.
Blood lead test: a small blood sample that measures lead in micrograms per deciliter (µg/dL). This is the only way to know your child’s actual level. See blood lead test for how results are read.

The lead screening schedule at a glance

Federal Medicaid rules, the AAP schedule and CDC guidance; states can add tests.

Age	What’s recommended	Source
6 months	Lead risk assessment (questions) at the well-child visit	AAP Bright Futures
9 months	Risk assessment; in Massachusetts, a blood test once between 9 and 12 months	AAP; Massachusetts DPH
12 months (1 year)	Risk assessment; blood lead test required for children on Medicaid or CHIP-funded Medicaid; blood test for all children in states with universal testing	AAP; CMS (EPSDT); state health departments
18 months	Risk assessment	AAP Bright Futures
24 months (2 years)	Risk assessment; second blood lead test required for Medicaid; blood test in universal-testing states	AAP; CMS (EPSDT); state health departments
2 to 6 years (24 to 72 months)	Risk assessment every year at 3, 4, 5 and 6; blood test for any Medicaid child with no record of a previous test; extra tests in some states (for example ages 3 and 4 in Massachusetts)	AAP; CMS; state health departments
Newly arrived refugee children (up to 16)	Blood test at the domestic medical exam; children 6 and under get a repeat test 3 to 6 months later	CDC refugee health guidance

Medicaid and CHIP: tests at 12 and 24 months

Medicaid’s EPSDT (Early and Periodic Screening, Diagnostic and Treatment) benefit sets the clearest rule. The Centers for Medicare & Medicaid Services (CMS) says all children enrolled in Medicaid, whether coverage is funded through title XIX (Medicaid) or title XXI (CHIP), are required to receive blood lead screening tests at 12 months and 24 months. Any child between 24 and 72 months with no record of a previous blood lead test must also receive one.

Two details from CMS guidance:

Filling out a risk questionnaire does not meet the Medicaid requirement. The blood test itself has to be done.
Medicaid pays for point-of-care blood lead tests done in the doctor’s office, so many families get the result during the same visit.

The AAP Bright Futures schedule for every child

For children not on Medicaid, pediatricians usually follow the AAP’s Bright Futures periodicity schedule. The AAP says it recommends a lead risk assessment at the 6, 9, 12, 18 and 24 month well-child visits and at 3, 4, 5 and 6 years. A blood lead test follows when the risk assessment is positive or when parents are concerned. The AAP also notes that Medicaid programs in many states require a universal blood test at the 12 and 24 month visits.

The CDC names higher-risk groups, including children who live in or spend time in buildings built before 1978, children in low-income households, and immigrant, refugee and recently adopted children. You can always ask for a test.

States that test every child

Many states go further. Examples from state health departments:

Illinois: universal testing took effect July 1, 2026. The Illinois Department of Public Health says all Illinois children are to be tested automatically at 12 and 24 months, and all children 6 and younger are to be assessed for lead exposure with a questionnaire from their health care provider. Before that date, the automatic tests applied only in high-risk ZIP codes.
Michigan: under a 2023 law and rules made final in 2025, physicians are to test, or order a test for, all children at 12 and 24 months, with a test between 24 and 72 months if there is no record of earlier tests. Families may opt out of universal testing.
New York: the state health department says to get children blood lead tested at age 1 and again at age 2, and that providers should assess children from 6 months to 6 years for lead risk at every well-child visit.
Massachusetts: the state requires a blood lead test at least once between 9 and 12 months, again at age 2 and age 3, and at age 4 in communities the state designates as high risk. Children need proof of a lead test to enter child care, preschool or kindergarten.

Rules change, and other states have their own schedules. Your pediatrician or your state or local health department can tell you what applies to your child.

The lead screening questionnaire

The risk assessment is a handful of yes-or-no questions. There is no single national form; states and clinics use their own versions built on CDC guidance. As one example, the South Dakota Department of Health asks:

“Does the child live in or regularly spend time in a home built before 1978?” (It notes this is especially important with chipping or peeling paint or a renovation in the past year.)
“Does the child live with a parent or caregiver who works in an occupation with frequent lead exposure?”
“Does the child have a sibling or playmate with a blood lead level of 3.5 µg/dL or higher?” Or has a parent or caregiver asked for a lead test out of concern?
“Has the child recently arrived in the U.S. as an immigrant, refugee, or foreign adoptee?”

If the answer to any question is “yes” or “I don’t know,” South Dakota advises talking with your child’s health care provider about a blood lead test.

Before the visit, find out when your home and child care setting were built, and think about recent paint work, jobs and hobbies, and imported spices, remedies, dishes, toys or jewelry (see lead in toys and jewelry).

What happens at the test

The CDC describes two ways to take the sample:

Capillary test (finger-prick or heel-prick): usually the first step. A few drops of blood are collected, and results can come quickly, sometimes during the visit. Lead on the skin can get into the sample and make the result read higher than it really is.
Venous test (blood draw from a vein): results take a few days from a lab. It is used to confirm a capillary result at or above the CDC’s blood lead reference value of 3.5 µg/dL.

A high finger-stick number is not a diagnosis on its own. The doctor will usually order a venous test to confirm it, and the timing of that test depends on how high the first result was. What the numbers mean and the CDC’s follow-up steps are explained in blood lead levels and lead poisoning test.

Refugee, immigrant and internationally adopted children

Children from other countries may have been exposed before arriving. For refugees, CDC guidance for the domestic medical exam (done within 90 days of arrival) says:

All refugee infants and children up to 16 years old should get a blood lead test.
Children 6 and younger should get a repeat test whatever the first result was; if it was below 3.5 µg/dL, within 3 to 6 months after the first screening.
Older children with an elevated first result, or with risk factors such as a sibling with an elevated level, may need follow-up testing too.
Newly arrived pregnant or breastfeeding women and girls should also be screened.

Where to get your child tested, and what it costs

Your child’s doctor or clinic. The usual place, often at the 1 and 2 year checkups.
Your local health department. The CDC says health care providers and most local health departments can test for lead in blood.
WIC. If your family uses WIC, ask your WIC office whether it offers lead testing or can refer you to a place that does.

Cost: the CDC says Medicaid covers testing for enrolled children and many private insurance plans cover it. Without coverage, prices are not standardized, so we don’t list them; ask your local health department about options.

What you can do while you wait

You can start looking for lead around your child now. These steps from the CDC and EPA don’t replace testing:

If your home was built before 1978, look for peeling or chipping paint, especially on windows, doors and porches, and keep children away from it. Our lead paint testing guide explains your options.
Wet-mop floors and wipe windowsills, wash hands and toys often, and take shoes off at the door.
Use cold tap water for drinking, cooking and baby formula.
Check toys, jewelry, spices and dishes against FDA and CPSC recalls.

More in lead poisoning causes and prevention and the lead poisoning hub.

Frequently asked questions

At what age should my child have a lead test?

Blood tests are due at 12 and 24 months for children on Medicaid and in universal-testing states, with a catch-up test by age 6 if missed. The AAP adds risk questions at every well-child visit from 6 months to 6 years.

Does my 1 year old need a lead test?

On Medicaid or in a universal-testing state, yes: the first blood test is due at 12 months. Otherwise the doctor asks risk questions and recommends a test if there is risk or if you ask.

My child was tested at 1. Do they need another test at 2?

Under Medicaid rules and in states such as Illinois, Michigan and New York, yes. A result below the reference value at 12 months does not rule out exposure later.

Is the lead screening questionnaire enough?

Not for children on Medicaid: CMS says a risk questionnaire does not meet the requirement, and the blood test must be done. For other children, the questionnaire helps the doctor decide whether a blood test is needed. Only a blood test shows your child’s actual level.

Can I test my child for lead at home?

No. Only a blood test through a doctor, health department or lab measures lead in a child. Home kits test surfaces or water, which can help find a source.

October 10, 2026

Effects of Lead Poisoning on Children and Adults

The effects of lead poisoning depend on age, how much lead and for how long, but official health agencies agree on the main ones. In children, lead harms the developing brain and nervous system, with effects on learning, attention and behavior; in adults, it is linked to higher blood pressure, kidney damage and fertility problems, and some effects in both can be permanent.

An adult having blood pressure checked by a nurse

In short: the CDC says no safe blood lead level in children has been identified, and the World Health Organization says there is no known safe blood lead concentration. Even low levels in children are associated with lower IQ scores and school achievement and with attention and behavior problems, according to the CDC and NIEHS. In adults, NIEHS links levels below 10 µg/dL to higher blood pressure and reduced kidney function, and NIOSH lists anemia, nerve and brain damage and infertility at high exposure. Because damage may not be reversible, prevention and early testing matter most. If you are worried, talk to a doctor or your local health department, or call Poison Control at 1-800-222-1222.

This page explains what the CDC, the National Institutes of Health (through NIEHS and its National Toxicology Program), NIOSH and WHO publish. It is not a diagnosis or medical advice. For an overview of the topic, start at our lead poisoning hub.

Lead toxicity: why lead harms the body

Lead toxicity is the medical term for the harm lead does once it is inside the body. Lead travels in the blood, reaches the brain, kidneys and other organs, and is stored in bones and teeth, the WHO explains. Stored lead can move back into the blood years later, for example during pregnancy, and reach a developing baby.

Doctors measure exposure with a blood lead test, reported in micrograms per deciliter (µg/dL). The CDC’s blood lead reference value for children is 3.5 µg/dL. That number marks the top 2.5% of US children aged 1 to 5; it is a screening tool, not a line below which lead is harmless.

Effects of lead on children

Children are the main concern for three reasons the CDC and WHO describe: they put hands and objects in their mouths, so they swallow more dust and soil; their bodies absorb more of the lead they swallow than adults do; and their brains are still developing. Children under 6 are the most likely to be exposed, the CDC says.

The CDC lists these effects of lead exposure in children:

Damage to the brain and nervous system
Slowed growth and development
Learning and behavior problems
Hearing and speech problems

The CDC adds that these can show up as lower IQ, a shorter attention span and doing less well in school. The WHO describes reduced attention span and increased antisocial behavior, and says lead exposure in children also causes anemia, high blood pressure, kidney problems and harm to the immune and reproductive systems.

Most of this happens quietly. The CDC says most children with lead in their blood have no obvious immediate symptoms, which is why testing matters more than watching for signs. Our lead poisoning symptoms guide lists the signs that do appear, mostly at higher levels, and our lead and children guide covers screening ages and prevention.

Effects at low levels

NIEHS, part of the NIH, summarizes the research by blood lead level. It says health effects in children are found at levels below 5 µg/dL and may include lower IQ scores and academic achievement, and that levels at or below 10 µg/dL are associated with more behavioral effects and delayed puberty. The National Toxicology Program’s 2012 review of low-level lead concluded there is evidence of harm in both children and adults below 10 µg/dL and, for some effects, below 5 µg/dL.

These are associations found across many studies of groups of people. They describe risk across a population; they cannot predict what will happen to one particular child. A child’s doctor is the right person to talk to about a specific result.

Effects at very high levels

At very high levels, lead can cause severe illness. The NIH’s MedlinePlus lists vomiting, a staggering walk, muscle weakness, seizures and coma. The WHO says children who survive severe lead poisoning may be left with permanent intellectual disability and behavior disorders. These are medical emergencies: call 911.

Effects of lead on adults

Most adults with high blood lead are exposed at work, according to NIEHS, in jobs such as construction, mining, welding and battery manufacturing. Others are exposed through home renovation, hobbies or contaminated products.

Body system	What official sources say
Heart and blood pressure	NIEHS: levels below 10 µg/dL are associated with increases in blood pressure; above 15 µg/dL with cardiovascular effects. WHO: increased risk of high blood pressure and cardiovascular problems. NIOSH lists heart disease.
Kidneys	NIEHS: levels below 10 µg/dL are associated with decreased kidney function, and even below 5 µg/dL may decrease it. WHO and NIOSH list kidney damage.
Brain and nerves	NIOSH: high exposure may cause neurologic and brain damage; long-term exposure can bring depression, irritability, mood changes, distraction and forgetfulness, and pain or tingling in the hands or feet.
Reproduction	NIOSH: infertility in both men and women. NIEHS links levels above 15 µg/dL to fertility problems.
Blood	NIOSH and ATSDR: anemia.
Other	NIOSH also lists hearing damage, decreased lung function, bone or tooth loss and more infections, and says lead is possibly linked to cancer.

NIOSH notes that these effects are the same whether lead is breathed in, swallowed or absorbed through the skin, that symptoms look like those of other illnesses and may develop slowly, and that very high exposure can kill. If you work with lead, tell your doctor.

Effects during pregnancy

Lead crosses the placenta. The CDC says lead stored in a mother’s bones can be released into the blood during pregnancy, and that lead exposure in pregnancy can raise the risk of miscarriage, of a baby being born too early or too small, and of harm to the baby’s brain, kidneys and nervous system. NIEHS says maternal blood lead levels even below 5 µg/dL are associated with reduced fetal growth, and the WHO lists reduced fetal growth and preterm birth. If you are pregnant and think you may have been exposed, the CDC’s advice is to talk to your health care provider.

Long-term effects of lead poisoning

The official wording here is careful, and so are we. What the agencies say:

CDC: “The effects of lead poisoning can be permanent and disabling.”
WHO: lead can permanently affect children’s brain development, and lead causes long-term harm in adults, including increased risk of high blood pressure.
NIEHS: many effects are permanent, and research suggests some psychological effects of childhood exposure may not appear until adulthood. NIEHS-funded research has also linked early-life lead exposure with psychiatric disorders and substance abuse.
WHO, worldwide: citing estimates from the Institute for Health Metrics and Evaluation, more than 3.5 million deaths in 2023 were attributed to lead exposure, mainly through effects on the heart and blood vessels.

A few cautions help read this research well. Many long-term findings come from studies that follow groups of people over time, and they show links, not certainty for any one person. Global death estimates are models, and they include countries with far higher exposure than the US. And lead stored in bone means that exposure in the past can still matter today, which is one reason doctors ask about old jobs, hobbies and homes.

Can the effects be reversed?

Blood lead levels can come down once the source is removed, and doctors can treat very high levels. But treatment does not undo damage that has already happened, and the CDC and WHO both describe some effects as permanent. That is why the CDC’s follow-up for children includes early educational services and developmental checks alongside removing the lead. Our guide to lead poisoning treatment explains what doctors and health departments do at each blood lead level.

Why prevention matters most

Because damage may be permanent and often has no symptoms, the CDC’s approach is to remove lead hazards before a child is exposed, which it calls primary prevention. In most US homes that means:

Old paint and dust. Homes built before 1978 probably contain lead-based paint, the CDC says, and peeling paint and renovation dust are the most common hazards. See lead paint testing and dust and soil testing.
Water. Lead pipes, solder and some brass fixtures can add lead to tap water. See lead in water testing.
Products. Some imported spices, candies, remedies, cosmetics, pottery, toys and jewelry. See lead in household items.
Work and hobbies. Lead dust carried home on clothes, shoes and hair.

Our guide to lead poisoning causes and prevention covers each source and the CDC and EPA steps in detail. When a home needs inspection or repair, use a certified professional from our directory.

Frequently asked questions

What are the long-term effects of lead poisoning?

In children, official sources describe lasting effects on learning, attention, behavior and development; in adults, higher blood pressure, heart and kidney problems and fertility effects. The CDC says effects can be permanent. How a specific person is affected depends on the level and length of exposure.

Is lead toxicity the same as lead poisoning?

The terms are used for the same problem: harm from lead in the body. Health agencies also talk about lead exposure, meaning any lead taken in, since no safe level has been identified in children.

Can a small amount of lead cause harm?

NIEHS says health effects in children are found below 5 µg/dL, and the CDC says no safe level in children has been identified. That is why doctors take any detectable level seriously and look for the source.

Do adults recover from lead exposure?

Blood levels fall once exposure stops, but lead stored in bone can stay for years, and some effects may last. An adult with possible exposure should talk to a doctor, who can order a blood test and advise on follow-up.

How do I know if my child has been affected?

Only a blood test shows exposure. Ask your child’s doctor or your local health department. If your child may have swallowed something with lead, call Poison Control at 1-800-222-1222; for severe symptoms such as a seizure, call 911.

October 10, 2026

Lead Poisoning Treatment: How Doctors Manage High Blood Lead

Lead poisoning treatment starts with finding the lead and getting the person away from it. For most children and adults with lead in their blood, the CDC’s guidance for health care providers centers on removing the source, repeat blood tests, a healthy diet and close follow-up, with medicine to pull lead from the body (chelation) kept for very high levels and given only by medical professionals.

A health department nurse visiting a family at home

In short: there is no home treatment for lead poisoning. If a blood test shows lead, a doctor and often the local health department will look for where it came from, schedule follow-up tests, check diet and development, and in some cases send an inspector to the home. At very high levels, the CDC tells providers to consider hospital care and to consult a medical toxicologist about treatments such as chelation. If you are worried about lead exposure, call your doctor, your local health department or Poison Control at 1-800-222-1222. Call 911 for severe symptoms such as a seizure.

This page explains what the CDC and its toxic-substances agency ATSDR publish for health care providers. It is not medical advice, and it is not a plan you can follow at home. Only a health care provider who knows the patient can decide on care.

Step one: find the lead and remove it

Lead does not leave the body while new lead keeps coming in. That is why every level of the CDC’s recommended actions includes looking for the source. The CDC tells parents that when a child’s blood lead level is above its reference value, follow-up services can include finding and removing lead from the child’s environment, a diet high in iron and calcium, early educational services and follow-up blood testing. The CDC also describes primary prevention, removing lead hazards from the environment before a child is exposed, as the most effective way to protect children. Our lead poisoning hub sums up what the CDC, NIEHS and WHO say about why.

ATSDR, the CDC’s sister agency for toxic substances, says medical and environmental steps should happen at the same time to best protect a child, and that providers should start a prompt investigation for the source of exposure. In practice, the source is often in the home: deteriorating paint and the dust it makes, water from lead pipes, bare soil, a parent’s work clothes, or an imported spice, remedy or cosmetic. Our guides to lead paint testing, lead in water testing, dust and soil testing and lead in household items explain how each one is checked.

Do not try to strip or sand old paint yourself to “get rid of” the lead. The EPA warns that renovation can create large amounts of lead dust, and that lead abatement should be done by certified professionals. Find one through our lead professional directory.

What the CDC recommends at each blood lead level

The CDC publishes a table of recommended actions for children’s blood lead levels, measured in micrograms per deciliter (µg/dL). Its blood lead reference value is 3.5 µg/dL, the level that marks the top 2.5% of US children aged 1 to 5. The reference value is a screening tool, not a safe line: the CDC says no safe blood lead level in children has been identified. Each row below includes all the actions in the rows above it. We summarize the CDC’s provider guidance as published on its “Recommended Actions Based on Blood Lead Level” page (dated August 21, 2025).

Blood lead level (µg/dL)	What the CDC tells providers to do
Below 3.5	Teach families about lead sources and prevention; check development, diet and nutrition at well-child visits; repeat testing at intervals based on age and risk.
3.5 to 19	All of the above, plus: report to the state or local health department; take an environmental exposure history; arrange an environmental investigation as required where you live; test for and treat iron deficiency; review diet with a focus on calcium and iron; check development and refer for services as needed; schedule follow-up blood tests.
20 to 44	All of the above, plus: a full history and physical exam looking for signs of lead exposure; arrange or refer for an environmental investigation and lead hazard reduction; consider an abdominal X-ray to look for swallowed lead chips or objects; consult a Pediatric Environmental Health Specialty Unit (PEHSU) or Poison Control.
45 or higher	All of the above, plus: a detailed neurological exam; abdominal X-ray and, if needed, bowel decontamination; hospital admission if the child has symptoms, or if the home is not lead-safe or the source is unknown; consultation with a medical toxicologist or a pediatrician experienced in lead poisoning about decontamination or chelation.

A finger-prick (capillary) result at or above the reference value is confirmed with a blood draw from a vein, because lead on the skin can make a finger-prick read high. The higher the first result, the sooner the CDC wants that confirmation: within 3 months for 3.5 to 9 µg/dL, within 1 month for 10 to 19, within 2 weeks for 20 to 44, and within 48 hours for 45 or more. Our blood lead test guide explains the two kinds of test and what a result means.

Case management and the health department

Once a child’s blood lead level is at or above the reference value, the CDC tells providers to report it to the state or local health department. Many health departments then run what is called case management: a nurse or case worker follows the child, helps the family find and fix the source, and makes sure repeat tests happen. What the health department does, and at what level, is set by each state or city. The CDC’s guidance says environmental investigations should be arranged “as required,” because the rules differ from place to place. It also notes that in housing covered by HUD’s Lead Safe Housing Rule, an investigation may not be triggered below 5 µg/dL.

An environmental investigation usually means a trained inspector or risk assessor visits the home to look for paint, dust, soil and water hazards, and asks about jobs, hobbies, foods, spices, remedies and cosmetics. If you rent, tell your health department and your landlord; if you own, the investigator’s report tells you which hazards need professional work. For the difference between an inspection and a risk assessment, see lead paint inspection.

Nutrition: what the CDC says

The CDC’s advice on food is short and specific: for a child with a blood lead level above the reference value, it lists “a diet high in iron and calcium” among the follow-up services a doctor may recommend. For providers, it adds testing for and treating iron deficiency, reviewing the child’s diet with a focus on calcium and iron, and referring families to nutrition programs such as WIC.

A good diet supports a child’s health while the source is removed. It is not a treatment that removes lead, and it does not make lead exposure safe. Do not give a child iron, calcium or any other supplement for lead unless the child’s own doctor tells you to; the CDC’s guidance has the provider test for iron deficiency first.

Chelation: only for high levels, only by medical professionals

Chelation therapy uses prescription medicine that binds to lead so the body can get rid of it. The CDC says that if a child does have high levels of lead in the blood, they may receive chelation therapy, and its provider guidance places it at 45 µg/dL and above, decided together with a medical toxicologist or a pediatrician experienced in lead poisoning. ATSDR adds that 45 µg/dL is a guideline rather than a fixed threshold, that professional judgment should guide the decision for a child or an adult, and that chelation is not risk free.

We describe chelation only so you know what a doctor may talk about. It is a hospital or specialist treatment. Products sold online as “detox” or “chelation” for lead are not the same thing, and no official source we use recommends them. If anyone suggests a home lead detox, talk to your doctor or call Poison Control at 1-800-222-1222 first.

Follow-up blood tests

Treatment is measured with repeat blood tests. The CDC’s schedule for children after a confirmed venous result is:

Venous blood lead level (µg/dL)	Early follow-up	Later follow-up, once levels are falling
3.5 to 9	3 months	6 to 9 months
10 to 19	1 to 3 months	3 to 6 months
20 to 44	2 weeks to 1 month	1 to 3 months
45 or higher	As soon as possible	As soon as possible

The CDC notes that blood lead levels can change with the seasons, and that more time outdoors in summer may call for more frequent checks. ATSDR lists reasons a level may rise again: a source nobody has found yet, incomplete repairs, a hazard that was not controlled, or lead stored in the body moving back into the blood. A level that will not come down is a signal to look again, not a reason to give up.

Adults and pregnancy

For adults, most elevated blood lead comes from work, according to NIEHS, in jobs such as construction, mining, welding and battery manufacturing. NIOSH, the CDC’s worker-safety institute, asks people who work with lead to tell their doctor, and describes steps at work, such as changing clothes and showering before going home, that protect both the worker and the family. ATSDR says professional judgment should guide any decision to chelate an adult.

Lead stored in the bones can move into the blood during pregnancy and reach the baby, the CDC says. If you are pregnant or breastfeeding and think you may have been exposed, talk to your health care provider. Do not start or stop anything on your own.

Why there is no home treatment

The CDC says the effects of lead poisoning can be permanent and disabling, and most children with lead in their blood have no obvious symptoms (see lead poisoning symptoms). Treatment cannot undo damage that has already happened, which is why the official focus is on stopping exposure early, supporting the child’s development and checking that levels fall. All of that runs through a doctor and the health department. What you can do at home is the prevention side: wet-clean dust, wash hands and toys, keep children away from peeling paint, use cold tap water for drinking and cooking, and test your home. Our guide to lead and children has the full CDC and EPA list.

Who to call

911 for severe symptoms such as a seizure, collapse or trouble breathing.
Poison Control, 1-800-222-1222, if you think someone swallowed something with lead or you have urgent questions. It is free and answers around the clock.
Your doctor or your child’s pediatrician for a blood lead test and follow-up.
Your local health department for testing, case management and home investigations.

Frequently asked questions

Can lead poisoning be cured?

Blood lead levels can come down once the source is removed, and doctors can treat very high levels. But the CDC says some effects of lead can be permanent, so the goal is to stop exposure as early as possible. Ask your doctor what to expect for your situation.

How do you treat lead poisoning at home?

You don’t. There is no home treatment. At home, you can help by following the health department’s advice to remove lead sources, keeping dust down and making sure follow-up blood tests happen. Any medical treatment comes from a doctor.

At what level is chelation used?

The CDC’s guidance for children places it at 45 µg/dL and above, decided with a medical toxicologist or experienced pediatrician. ATSDR calls 45 a guideline, not a fixed rule. The decision belongs to the medical team.

How long does it take for blood lead levels to go down?

Official sources do not give one timeline; it depends on the level, how long the exposure lasted and whether the source is gone. That is why the CDC sets follow-up tests from 2 weeks to 9 months apart depending on the result.

Does eating well lower lead levels?

The CDC recommends a diet high in iron and calcium for children with elevated blood lead, alongside removing the source. Diet supports the child; it does not remove lead or replace medical follow-up. Don’t give supplements unless your doctor says so.

Who pays for testing and follow-up?

The CDC says many private insurance policies cover blood lead testing, and Medicaid covers it for enrolled children. Ask your health department about home investigations and local programs, which vary by state.

October 10, 2026

Blood Lead Test: How It Works and What Your Results Mean

A blood lead test measures how much lead is in a person’s blood, and it is the only reliable lead poisoning test: the one way to know whether someone has been exposed. The CDC calls it the best way to find out whether a child has lead poisoning, because most children with lead in their blood look and act healthy.

In short: the test is a small blood sample, taken either from a finger or heel (capillary) or from a vein (venous). Results come in micrograms of lead per deciliter of blood (µg/dL). The CDC’s blood lead reference value is 3.5 µg/dL, in use since October 2021: a child at or above it has more lead than 97.5% of US children aged 1 to 5. A high finger-stick result should be confirmed with a venous test. Children on Medicaid must be tested at 12 and 24 months, and between 24 and 72 months if never tested. Ask your child’s doctor or your local health department about testing.

This guide explains what official sources say about the test and the numbers. It is not medical advice, and only a health care provider can interpret a result for you or your child. For urgent questions about a possible poisoning, call Poison Control at 1-800-222-1222.

What a blood lead test measures

Lead that is swallowed or breathed in enters the bloodstream. A blood lead test reports the concentration in µg/dL. The CDC says any detectable lead means a child has been exposed, and may still be exposed, and it states that no safe level of lead in children has been identified.

A blood test shows mainly recent and ongoing exposure. It does not show where the lead came from, so a high result is usually the start of a search for the source, not the end of the story. For that search, see our guides on lead paint testing, lead water testing and dust and soil testing.

Finger-stick vs venous: the two kinds of sample

	Capillary (finger-stick or heel-stick)	Venous (blood draw from a vein)
How it is taken	A prick on the finger or heel; a few drops of blood	A standard blood draw from a vein in the arm
Speed	Often the first step; can give fast results, including point-of-care tests in the office	Results usually take a few days from a lab
Reliability	Can read falsely high if lead on the skin gets into the sample	The CDC says venous samples are more reliable at identifying lower blood lead levels
Typical use	Screening	Confirming a capillary result at or above the reference value; follow-up

The CDC advises that when a capillary result is at or above the reference value, a venous sample should be collected to confirm it. If the first test was already venous, no second draw is needed for confirmation. That risk of lead on the skin getting into the sample is the main reason a high finger-stick result is not treated as final.

The CDC blood lead reference value: 3.5 µg/dL

The blood lead reference value (BLRV) is how the CDC identifies children with more lead in their blood than most US children. It is 3.5 µg/dL. The CDC lowered it from 5 µg/dL to 3.5 µg/dL in October 2021, based on the National Health and Nutrition Examination Survey (NHANES) cycles from 2015 to 2018. It marks the 97.5th percentile of blood lead levels among US children aged 1 to 5, so a child at or above it is in the top 2.5%.

Two points are easy to miss:

The BLRV is not a safe level and not a health-based standard. The CDC’s 2021 report says plainly that no safe blood lead level in children exists. A result below 3.5 µg/dL does not mean lead can be ignored.
The value can change. The CDC says it reviews the latest two NHANES cycles every four years to decide whether to update it. The CDC estimates that about 500,000 US children have blood lead levels at or above the current value.

Who should be tested, and when

Children on Medicaid

Federal Medicaid rules require that all children enrolled in Medicaid receive blood lead screening tests at 12 months and 24 months of age. Any child between 24 and 72 months with no record of a previous blood lead test must also be tested. This applies whether coverage comes through Medicaid (title XIX) or CHIP-funded Medicaid (title XXI). A CMS bulletin from 2016 adds that a risk questionnaire alone does not meet the requirement; the blood test must actually be done. Medicaid covers point-of-care tests drawn in the doctor’s office.

Other children

For children not on Medicaid, the CDC recommends testing children at higher risk. It names children who live in or often visit homes or buildings built before 1978, children in low-income households, children who are immigrants, refugees or recently adopted from other countries, and children exposed through a household member’s job or hobby. The American Academy of Pediatrics’ Bright Futures schedule calls for a lead risk assessment at the 6, 9, 12, 18 and 24 month well-child visits, followed by a blood test when the assessment shows risk. Many states set their own rules, sometimes universal testing at certain ages, so ask your pediatrician or state health department what applies where you live.

Adults and pregnancy

Adults can be tested too, usually when a doctor suspects exposure from work, a hobby, a home renovation or a contaminated product. NIOSH advises anyone who works with lead to tell their doctor. During pregnancy, the CDC says lead can pass to the baby, and its guidance asks providers to look for the source of exposure when a pregnant or breastfeeding person’s level is 5 µg/dL or higher. If you are pregnant and think you may have been exposed, ask your provider about a test.

Where to get a lead poisoning test and what it costs

The CDC says health care providers and most local health departments can test for lead. Many private insurance plans cover it, and Medicaid covers it for enrolled children. We do not list prices because they vary by lab, insurer and state; ask your provider or health department before the test.

Home swab kits and water kits do not test people. They are for surfaces or water, and our lead test kits hub explains what each kind can and cannot do.

What your child’s results mean: the CDC follow-up table

The CDC publishes recommended actions for health care providers based on a child’s confirmed venous blood lead level. This summary is for understanding the conversation with your doctor, not a substitute for it.

Venous blood lead level	Confirm a capillary result within	Follow-up testing (CDC)	Other actions the CDC lists for providers
Below 3.5 µg/dL	Not needed	Per the usual age-based schedule (Medicaid: 12 and 24 months)	Education about lead sources, developmental checks, diet review
3.5 to 9 µg/dL	3 months	Early follow-up at 3 months, later every 6 to 9 months	Report to the health department, exposure history, environmental investigation as required, check for iron deficiency, review diet and development
10 to 19 µg/dL	1 month	1 to 3 months, later every 3 to 6 months	Same as above
20 to 44 µg/dL	2 weeks	2 weeks to 1 month, later every 1 to 3 months	Above, plus full history and exam, environmental investigation and hazard reduction; providers may consult a Pediatric Environmental Health Specialty Unit or Poison Control
45 µg/dL or higher	48 hours	As soon as possible	Urgent medical evaluation; the doctor decides on treatment, which may include hospital care

For children above the reference value, the CDC says a doctor may recommend finding and removing lead from the home, a diet rich in iron and calcium, early educational services and repeat testing. Treatment decisions are for the child’s doctor; our lead poisoning treatment page explains what official guidance describes. Do not try home remedies or supplements sold to “remove lead.”

After a high result: finding the source

In many states, a child’s elevated result is reported to the health department, which may offer a home visit or an environmental investigation. Medicaid also pays for lead investigations in the homes of enrolled children with elevated levels. You can also hire a certified risk assessor; see find a lead professional and lead paint inspection vs risk assessment.

Common places to look, depending on your home and habits (our lead poisoning causes and prevention page covers each in more depth):

Old paint and the dust it makes, especially in homes built before 1978: is lead paint dangerous?
Drinking water from lead pipes or fixtures: lead pipes
Soil near old houses and busy roads: lead in soil testing
Spices, imported candies, remedies, cosmetics and dishes: lead in cinnamon and spices and lead in pottery and dishes
A household member’s work or hobby

More on symptoms and health is on our lead poisoning symptoms page and the lead poisoning hub.

Frequently asked questions

What is a normal blood lead level?

There is no “normal” or safe level. The CDC uses 3.5 µg/dL as a reference value to identify children with more lead than 97.5% of US children aged 1 to 5, and it says no safe blood lead level in children has been identified.

Is a finger-prick lead test accurate?

It is a good screening test, but it can read high if lead on the skin gets into the sample. The CDC recommends confirming a capillary result at or above 3.5 µg/dL with a venous blood draw.

At what age should my child get a blood lead test?

Medicaid requires tests at 12 and 24 months, and between 24 and 72 months if never tested. For other children, the CDC recommends testing those at higher risk, and the AAP calls for a risk assessment at well-child visits from 6 to 24 months. Ask your pediatrician what applies to your child.

How long do blood lead test results take?

Finger-stick tests done in the office can give results quickly. Venous samples sent to a lab usually take a few days, according to the CDC.

Can I test my own blood for lead at home?

Lead in people is measured with a blood test through a health care provider, a health department or a lab. Home swab kits are for surfaces such as paint, not for people.

My child’s level is above 3.5 µg/dL. What happens next?

The CDC recommends confirming the result with a venous test, then follow-up testing, a search for the source and a review of diet and development. Your doctor and local health department will guide the next steps. If your child has severe symptoms, call 911.

October 10, 2026

Lead Poisoning Symptoms in Children and Adults

Lead poisoning symptoms are often vague or missing altogether, which is why so many cases are found only through a blood test. The CDC says most children with lead in their blood have no obvious immediate symptoms, and in adults the signs, such as stomach pain, headaches, tiredness or irritability, look like many other everyday illnesses.

A doctor talking with an adult patient in a clinic

In short: when symptoms do appear, official sources list stomach pain and cramping, constipation, nausea, headaches, tiredness, irritability, trouble sleeping, poor appetite and, in young children, learning, behavior and development problems. Very high levels can cause vomiting, a staggering walk, seizures or coma. A blood lead test is the only way to know. If someone has severe symptoms such as seizures or repeated vomiting, call 911. For other worries about exposure, call Poison Control at 1-800-222-1222 or talk to a doctor or your local health department.

This page explains what the CDC, its worker-safety institute NIOSH and the National Institutes of Health (through MedlinePlus) say about symptoms. It is not a diagnosis and not medical advice. Only a health care provider can tell you what a symptom means for you or your child.

Why lead poisoning is easy to miss

Lead builds up quietly. It is swallowed or breathed in as dust, chips, soil or contaminated food and water, and much of the harm happens before anyone notices anything. The CDC states plainly that most children with any lead in their blood have no obvious immediate symptoms, and that no safe blood lead level in children has been identified.

NIOSH makes the same point about adults: lead symptoms are similar to those of other illnesses and may develop slowly, so lead poisoning can be overlooked. A parent may put a toddler’s crankiness down to teething, and an adult may blame stress or poor sleep for headaches and fatigue. That is why doctors rely on a blood lead test, not on symptoms, to find exposure.

Signs of lead poisoning in children

The CDC describes the effects of lead in children mainly in terms of how it affects growing bodies and brains, rather than a short checklist of signs. According to the CDC, lead exposure in children can cause:

Damage to the brain and nervous system
Slowed growth and development
Learning and behavior problems
Hearing and speech problems

The CDC links these effects to lower IQ, a shorter attention span and doing less well in school, and notes evidence that childhood exposure can cause harm that lasts. Our page on the effects of lead poisoning explains the longer-term picture.

MedlinePlus, the National Library of Medicine’s consumer health site, adds symptoms that families sometimes notice day to day. For young children it lists the loss of developmental skills they had already learned, alongside irritability, aggressive behavior, low appetite and energy, trouble sleeping, constipation, and stomach pain and cramping. It also lists anemia (a low red blood cell count), which a doctor can find with a blood test.

None of these signs, alone or together, proves lead poisoning. They are common in children for many reasons. What they do mean is that if your child has them and also lives in or visits an older home, or may have been around one of the sources on our lead and children page, it is worth asking the pediatrician about a blood lead test.

Symptoms in adults

NIOSH, the CDC’s worker-safety institute, splits adult symptoms into two patterns.

Pattern	Symptoms NIOSH lists
High exposure over a short time	Metallic taste; stomach pain, nausea, vomiting; diarrhea or constipation; dehydration, headache, exhaustion, irritability, weakness; loss of appetite; memory loss; pain or tingling in the hands or feet
Exposure over a long time	Stomach pain, nausea and constipation; depression, irritability and mood or behavior changes; distraction and forgetfulness; higher blood pressure
Other effects NIOSH lists	Decreased lung function; bone or tooth loss; more infections in general; fertility problems in men and women

MedlinePlus also lists headaches, hearing loss, reduced sensations, difficulty getting pregnant and anemia among the symptoms of lead poisoning, and notes that stomach pain and cramping are usually the first sign of a high, toxic dose.

Adults most often meet lead at work or through hobbies: construction and renovation of older buildings, battery recycling, metal work, firing ranges, stained glass and similar crafts. NIOSH notes that workers can carry lead dust home on clothes, shoes and tools, exposing their families. If you work with lead, NIOSH advises telling your doctor and your family’s doctors.

Lead in pregnancy

The CDC says lead stored in a person’s bones from earlier exposure can be released into the blood during pregnancy, and that lead can pass to the baby. It links lead in the blood during pregnancy to a higher risk of miscarriage, of a baby being born too early or too small, and of harm to the baby’s brain, kidneys and nervous system. If you are pregnant or breastfeeding and think you may have been exposed, talk to your health care provider about testing.

Signs of very high exposure: when it is an emergency

MedlinePlus lists the signs of very high lead levels as vomiting, a staggering walk, muscle weakness, seizures and coma. These are rare, but they are emergencies.

Situation	What official sources say to do
Severe symptoms, such as seizures, repeated vomiting or loss of consciousness	Call 911 right away (MedlinePlus)
Other symptoms that might be from lead, or a child swallowed something that may contain lead	Call Poison Control at 1-800-222-1222, free and confidential, any time
You suspect ongoing low-level exposure (old paint, work dust, a recalled product)	Contact your health care provider or local health department; an emergency room visit is usually not needed unless the exposure was a high dose (MedlinePlus)

Poison Control is staffed by specialists who can tell you whether a situation needs urgent care. Keep the number in your phone.

The only way to know: a blood lead test

Because symptoms are unreliable, the CDC calls a blood lead test the best way to find out whether a child has lead poisoning, and the best way to assess a person’s exposure in general. Results are given in micrograms of lead per deciliter of blood (µg/dL). The CDC uses a blood lead reference value of 3.5 µg/dL to flag children whose levels are higher than most US children’s, and says any detectable lead means a child has been exposed.

The CDC says health care providers and most local health departments can do the test, many private insurance plans cover it, and Medicaid covers it for enrolled children. Children on Medicaid are required to be tested at 12 and 24 months, and between 24 and 72 months if they have never been tested. Our blood lead test guide explains finger-stick and venous tests, what results mean and what follow-up the CDC recommends.

Do not try to treat suspected lead poisoning at home or with supplements or products sold online. Decisions about care belong to a doctor, who can look at the test results, the source of exposure and the whole picture. Our lead poisoning treatment page explains what official guidance says doctors do.

When to ask a doctor about testing

The signs of lead poisoning are easy to miss, so risk matters more than symptoms. The CDC recommends that children at higher risk be tested. It names children who live in or regularly visit homes or buildings built before 1978, children in low-income households, children who are immigrants, refugees or recently adopted from other countries, and children who may be exposed through a household member’s job or hobby. Talk to a doctor if:

Your home was built before 1978 and has chipping or peeling paint, or has been renovated recently. See is lead paint dangerous?
Your home has a lead service line or you are not sure. See lead pipes.
Someone in the household works with lead or has a lead-related hobby.
Your child used a recalled product, such as the 2023 cinnamon applesauce pouches. See lead in cinnamon and spices.
You use imported spices, candies, traditional remedies, cosmetics or glazed pottery that could contain lead. See lead in pottery and dishes.
Your child has any of the symptoms above and you want to rule lead out.

Finding and removing the source

A blood test tells you whether someone has been exposed; it does not tell you where the lead came from. When a child’s level is at or above the reference value, the CDC says health departments may help find the source, and doctors may recommend removing lead hazards from the home, a diet rich in iron and calcium, early educational services and repeat testing.

For the home itself, the first steps are usually checking paint, dust, water and soil. Our guides on lead paint testing, lead water testing and dust and soil testing explain the options, and you can find a certified lead inspector or risk assessor for a full investigation. Where lead comes from and how to keep it out of your home is covered in lead poisoning causes and prevention, and more on health is on our lead poisoning hub.

Frequently asked questions

What are the first signs of lead poisoning?

Often there are none. The CDC says most children with lead in their blood have no obvious immediate symptoms. MedlinePlus notes that stomach pain and cramping are usually the first sign of a high, toxic dose. Only a blood lead test can tell.

What are the symptoms of lead exposure in adults?

NIOSH lists stomach pain, nausea, constipation, headaches, tiredness, irritability, mood changes, forgetfulness, higher blood pressure, tingling in the hands or feet and fertility problems, among others. Because they resemble other illnesses, tell your doctor if you may have been exposed.

Can lead poisoning symptoms go away?

Symptoms can come and go, which is one reason they are unreliable. The CDC says even low levels can affect children and that some effects can last. Ask a doctor about testing and follow-up rather than waiting to see whether symptoms fade.

How fast do symptoms appear?

It depends on how much lead and over how long. NIOSH separates short, high exposures, which can cause symptoms such as stomach pain and vomiting, from long, low exposures, which build up slowly. Many children with lead in their blood show nothing at all.

Who should I call if I think my child swallowed something with lead?

Call Poison Control at 1-800-222-1222. If your child has severe symptoms such as a seizure, trouble breathing or repeated vomiting, call 911.

Is there a home test for lead poisoning?

Lead in a person is measured with a blood test ordered by a health care provider or local health department. Home swab kits are made for surfaces like paint, not for people. Ask your doctor or health department about blood testing.

October 10, 2026

Is Lead Paint Dangerous? When It Becomes a Hazard and What to Do

Lead paint is dangerous when it turns into chips or dust that people, especially young children, swallow or breathe. Intact lead paint in good condition is usually not an immediate problem, according to EPA, but paint that is peeling, rubbed by friction, knocked by doors or disturbed during renovation can create lead dust you can’t see. This guide explains when lead paint becomes a hazard under EPA and HUD definitions, who is most at risk, and the sensible next steps, without guessing about anyone’s health.

Intact painted walls in a well-kept older home

In short: homes built before 1978 may have lead-based paint; EPA estimates about three-quarters of them still contain some. Paint in good shape is usually not a hazard. It becomes one when it is deteriorating (peeling, chipping, chalking, cracking), when it sits on friction or impact surfaces such as windows, doors and stairs, when a child can chew it, or when sanding, scraping or demolition turn it into dust. Young children are the main concern. If you think there’s a problem, get the home tested by a certified professional and talk to your child’s doctor or your local health department.

Homes likely to have lead-based paint, by year built

Before 194087%

1940 to 195969%

1960 to 197724%

1978 and laterBanned

Lead paint was banned for homes in 1978. Source: EPA

Why lead paint is still in so many homes

Lead-based paint was banned for residential use in 1978, as CDC notes, so the risk is concentrated in older housing. The older the home, the more likely it is to contain it. EPA gives these estimates for homes likely to have lead-based paint:

Year built	Homes likely to have lead-based paint (EPA)
Before 1940	87%
1940 to 1959	69%
1960 to 1977	24%
1978 and later	Lead-based paint banned for residential use

CDC adds that about 29 million housing units have lead-based paint hazards, about 2.6 million of them homes with young children. Having lead paint somewhere in the house is not the same as having a hazard, though, and that distinction drives everything that follows.

Intact paint vs a lead paint hazard

EPA’s plain-language guidance says that if lead-based paint is in good shape, it is usually not a problem, and that deteriorating lead-based paint is a hazard that needs prompt attention. Federal rules put more detail on that. Under EPA’s hazard standards (40 CFR 745.65), these count as paint-lead hazards:

Condition	What it means	Typical places
Deteriorated paint	Lead-based paint that is peeling, chipping, chalking or cracking, or otherwise damaged or separated from its surface	Anywhere inside or outside, including porches and siding
Friction surface	Lead-based paint on a surface subject to abrasion, where nearby dust tests show a dust-lead hazard	Some windows, floors, stairs
Impact surface	Damaged lead-based paint on a surface hit by repeated sudden force from a related part	Parts of door frames
Chewable surface	Lead-based painted surface a young child can mouth, with evidence of teeth marks	Surfaces within a young child’s reach, such as sills or railings

For these rules, “lead-based paint” means paint with at least 1.0 milligram of lead per square centimeter, or 0.5 percent by weight. Paint below that level can still contain some lead; it just isn’t regulated as lead-based paint.

Why windows and doors matter so much

Every time an old window slides up and down or a door rubs its frame, a little paint is ground into fine dust. EPA notes that worn lead paint on surfaces with constant friction, such as doors and window sills, can produce chips and dust, and CDC lists windows, doors, floors, porches, stairways and cabinets as common places for lead dust. Settled dust can get back into the air when you sweep, vacuum or walk through, according to EPA. So a house can have a dust problem even when the walls look fine.

Lead dust and soil

EPA treats dust and bare soil as their own hazards. For dust, a 2024 EPA rule changed the standard: from January 12, 2026, any reportable level of lead in floor or window sill dust wipes, as analyzed by an EPA-recognized lab, counts as a dust-lead hazard, replacing the old 10 and 100 micrograms per square foot thresholds. EPA’s separate dust-lead action levels, at which it recommends abatement, are 5 micrograms per square foot on floors, 40 on window sills and 100 on window troughs. For soil, bare soil with 400 parts per million of lead or more in a play area, or an average of 1,200 ppm in the rest of the yard, is a soil-lead hazard. Our guides to lead dust testing and lead in soil testing explain how these are measured.

Renovation: the fastest way to make lead paint dangerous

Paint that has sat quietly under newer coats for decades can become a hazard in an afternoon. EPA warns that renovation or repair work may create large amounts of lead dust, and that even small dusty projects can pose risks to your family. CDC lists sanding, cutting and replacing windows among the common activities that create hazardous lead dust, and advises keeping children and pregnant women away from housing being renovated.

That’s why EPA requires contractors working on pre-1978 homes to be lead-safe certified and to follow specific work practices, and why some methods are off-limits, such as open-flame burning of painted surfaces. If you are planning work, read lead-safe renovation and the EPA RRP rule before anyone picks up a sander. If you want the paint gone or sealed for good, see lead paint removal, lead paint encapsulation and lead abatement.

Who is most at risk

Young children. EPA calls young children the main concern because they crawl, play on floors and put fingers, toys and other objects in their mouths. CDC says children younger than 6 are more likely to be exposed because of hand-to-mouth behavior, and that no safe blood lead level in children has been identified.
Pregnancy. The EPA/HUD disclosure fact sheet notes that if a pregnant person is exposed to lead, the developing baby can be exposed too, and the federal Lead Warning Statement names pregnant women as a group at particular risk.
People doing the work. EPA notes that workers doing demolition, renovation and repair can be exposed and can carry lead dust home on clothes and tools.

For what lead exposure can do to health and how it is checked, see lead and health, lead and children and blood lead test. Those pages summarize CDC and other official sources; they don’t replace a doctor.

Signs that lead paint in your home may be a hazard

You can’t see lead, so these are only reasons to test, not proof of anything:

The home was built before 1978, or you don’t know when.
Paint is peeling, chipping, cracking or chalky (a white powder comes off on your hand).
Old windows stick or leave paint flakes or dust in the sill or trough.
You see teeth marks on painted sills or railings.
There has been recent sanding, scraping, demolition or window replacement without lead-safe precautions.
Exterior paint is flaking onto bare soil where children play.

What to do next

These steps come from CDC and EPA guidance. They reduce exposure while you get answers; they are not a fix for lead paint.

Don’t disturb it. No dry sanding, scraping or heat until you know whether it’s lead-based paint and have a lead-safe plan.
Keep children away from damaged paint. CDC advises making sure children can’t reach peeling paint or chewable surfaces painted with lead-based paint.
Clean the wet way. CDC recommends regularly wet-mopping floors and wiping horizontal surfaces, since household dust can be a major source of lead, and washing children’s hands often.
Get the home tested. A certified inspector can tell you where lead-based paint is; a certified risk assessor can tell you whether there are hazards now, including dust and soil. CDC suggests asking your state or local health department about testing paint and dust. Start with our lead paint testing hub and how to test for lead paint, then find certified people through find a lead professional.
Talk to a doctor if you are worried about exposure. CDC says a blood lead test is the best way to find out if a child has been exposed, and to contact your child’s healthcare provider if you think your child has been exposed. Your local health department can help too.
Renting? Tell your landlord in writing about deteriorating paint and contact your local health department. Before you signed, the landlord should have given you a lead disclosure; see lead paint disclosure.

For questions about lead in the home, the National Lead Information Center answers at 1-800-424-LEAD (5323). If someone may have swallowed paint chips or another lead-containing item, call Poison Control at 1-800-222-1222. In an emergency, call 911.

Home screening kits: useful, with limits

A swab test can give you a quick first look at a painted surface, but it is not a lab result and not a risk assessment. EPA recognizes three swab kits (LeadCheck, D-Lead and the Massachusetts kit), and only for tests done by certified renovators or trained professionals, and only to show that regulated lead-based paint is not present. LeadCheck and D-Lead are recognized for wood, ferrous metal, drywall and plaster; the Massachusetts kit for drywall and plaster only. Swabs also say nothing about dust on your floors. A mail-in lab kit analyzes a sample you collect. Compare them in home lead test vs lab testing and best lead paint test kits. These were in stock on Amazon when checked in October 2026:

Quick look

LeadCheck Swabs, Instant Lead Test, 2 Swab Pack

Seller says pink or red tip means lead
For painted wood, metal, drywall per listing
About $15, seen October 2026

Check price on Amazon

Lab analysis

Schneider Labs Lead Test Kit: Paint, Dust or Soil

One sample of paint, dust or soil
Results within 5 business days of arrival (seller)
About $35, seen October 2026

Check price on Amazon

Is lead paint dangerous? Common questions

Is lead paint dangerous if it’s painted over?

Intact paint under newer coats is usually not an immediate hazard, per EPA. It can become one if the top coats fail, if it is on a window or door that rubs, or if someone sands, scrapes or demolishes it. Ordinary paint is not the same as encapsulation; see lead paint encapsulation.

Is it dangerous to touch lead paint?

The main exposure routes official sources describe are swallowing chips or dust and breathing in dust. Touching paint leaves dust on hands that can then reach the mouth, which is why CDC stresses regular handwashing for children. Wash your hands after handling old painted items.

Is lead paint dangerous to adults?

Young children are the main concern, but adults can be exposed too, especially during renovation work, and exposure during pregnancy can reach the baby. If you have concerns about your own exposure, talk to your doctor.

Is peeling lead paint outside dangerous?

Yes, it can be. Deteriorated exterior paint counts as a hazard under EPA’s standards, and flakes can contaminate the soil around the house where children play.

How do I know if my paint has lead?

Only testing tells you. A certified inspector using an XRF analyzer or lab analysis of paint chips gives a reliable answer; home swabs are a screening tool. Start with how to test for lead paint.

October 10, 2026