Tag: Blood Lead Level

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

Blood Lead Levels: What Your Lead Test Results Mean

There is no “normal” lead level in blood that is known to be safe: the CDC says no safe blood lead level in children has been identified. What a result can tell you is how your number compares with official benchmarks, such as the CDC’s blood lead reference value of 3.5 µg/dL, and what health agencies say should happen next.

Doctor explaining results to an adult patient in an exam room

In short: blood lead results in the US are given in micrograms per deciliter (µg/dL). For children, the CDC’s reference value is 3.5 µg/dL: a level at or above it is higher than in 97.5% of US children aged 1 to 5, and it starts follow-up. In pregnancy, CDC guidance starts follow-up at 5 µg/dL. OSHA requires removal from lead work at 50 to 60 µg/dL, a legal limit, not a safe level. A high finger-stick result needs a venous test to confirm it. Your doctor or health department decides what your number means for you.

Children's blood lead levels and CDC follow-up

3.5102045

3.5 µg/dL CDC reference value
10 µg/dL Confirm within 1 month
20 µg/dL Confirm within 2 weeks
45 µg/dL Confirm within 48 hours

No safe blood lead level has been identified. A capillary result above 3.5 is confirmed with a venous test. Source: CDC

This guide explains what official sources say about the numbers. It is not medical advice. For questions about a possible poisoning, call Poison Control at 1-800-222-1222; for severe symptoms, call 911. How the test itself is done, and who should be tested, is covered in our blood lead test guide.

How to read the number on your lead test results

US labs report a blood lead level (BLL) in µg/dL, micrograms of lead per deciliter of blood. The OSHA general industry standard writes it as µg/100 g of whole blood.

Labs outside the US often use micromoles per liter (µmol/L). The CDC’s guidelines for pregnant and lactating women give the conversion as 1 µg/dL = 0.0484 µmol/L. So 5 µg/dL is about 0.24 µmol/L, 10 µg/dL about 0.48 µmol/L, and the 3.5 µg/dL reference value about 0.17 µmol/L. If your report is in µmol/L, multiply by about 20.7 to get µg/dL, or ask the lab to state it in µg/dL.

On your report, also look for three details:

Sample type: capillary (finger-stick or heel-stick) or venous (from a vein). The CDC says a capillary result at or above the reference value should be confirmed with a venous sample, because lead on the skin can make a finger-stick read high.
“Less than” results: a value reported as below a limit (for example “<1”) means the lab cannot measure lower than that, not that there is zero lead.
The date: a blood test mostly reflects recent and ongoing exposure. Comparing results over time is how doctors see whether a level is going up or down.

Is there a normal lead level in blood?

Not in the sense of a safe range. The CDC’s 2021 report on the reference value states that no safe blood lead level in children exists, and the CDC says any detectable lead means a child has been exposed. The CDC’s 2010 guidelines on pregnancy say the same about pregnancy: no level has been found below which harmful effects do not occur.

What people often mean by “normal” is “typical.” CDC guidance notes the average US blood lead level fell from about 13 µg/dL in the 1970s to under 2 µg/dL by the mid-2000s, so most people today have a low number. Typical is not the same as harmless.

The CDC blood lead reference value (3.5 µg/dL) explained

The blood lead reference value is a statistical marker, not a health limit. The CDC sets it at the 97.5th percentile of blood lead levels in US children aged 1 to 5, measured by the National Health and Nutrition Examination Survey (NHANES). A child at or above it has more lead in their blood than 97.5% of children that age.

2012: the CDC introduced the reference value at 5 µg/dL, replacing the older “level of concern” of 10 µg/dL.
October 2021: the CDC lowered it to 3.5 µg/dL, using NHANES data from 2015 to 2018.
Going forward: the CDC says it reviews the two latest NHANES cycles every four years, so the number can change again.

It is a way to find the children with the most exposure and act there first, not a line between safe and unsafe. More on children is on our lead and children page.

What is an elevated blood lead level?

“Elevated” depends on who is using the word and for what purpose. These are the benchmarks official sources use today:

Number	What it is	Who uses it
3.5 µg/dL	Blood lead reference value for children aged 1 to 5 (97.5th percentile)	CDC, since October 2021
3.5 µg/dL	Reference value in the national “lead in blood” case definition, for children and adults (confirmed by a venous test, or two capillary tests in a child under 16)	CSTE (Position Statement 22-EH-01) and CDC national surveillance, 2023 definition
5 µg/dL	Level used to flag an elevated adult result for surveillance	NIOSH Adult Blood Lead Epidemiology and Surveillance (ABLES) program, per its guidance page (April 2024)
5 µg/dL	Level in pregnancy that should trigger follow-up testing, education and a search for the source; NIOSH says a pregnant person should not exceed it	CDC 2010 pregnancy and lactation guidelines; NIOSH
10 µg/dL	Pregnant women at or above it should be removed from work exposure to lead	CDC 2010 pregnancy and lactation guidelines
40 µg/dL	Mothers at or above it (confirmed) are advised to pump and discard breast milk until the level drops below 40	CDC 2010 pregnancy and lactation guidelines
50 / 60 µg/dL	Medical removal from lead work	OSHA lead standards (see the workers section below)

Note the gap between the public health numbers (3.5 to 10 µg/dL) and the OSHA workplace numbers (40 to 60 µg/dL). The OSHA standards date from 1978 and 1993.

Blood lead level chart for children: what the CDC says happens next

The CDC publishes recommended actions for health care providers by a child’s blood lead level. This is a summary to help you follow the conversation with your child’s doctor. The doctor and your local health department decide the actual plan.

Child’s blood lead level	Confirm a capillary result with a venous test within	What the CDC lists for providers
Below 3.5 µg/dL	No confirmation needed	Education about lead sources, developmental checks, diet review (iron and calcium), retesting by age and risk
3.5 to 9 µg/dL	3 months	All of the above, plus: report to the state or local health department, exposure history, environmental investigation as required, check for iron deficiency, follow-up testing
10 to 19 µg/dL	1 month	Same as 3.5 to 9, with follow-up testing sooner
20 to 44 µg/dL	2 weeks	All of the above, plus: full history and physical exam, environmental investigation and lead hazard reduction, other medical checks; the doctor may consult a Pediatric Environmental Health Specialty Unit or Poison Control
45 µg/dL or higher	48 hours	Urgent medical evaluation, including a detailed neurological exam; hospital admission if there are symptoms or the home is not lead-safe; the doctor consults a medical toxicologist about treatment

The retesting schedule for each band is in our blood lead test guide. Treatment decisions belong to the child’s doctor; our lead poisoning treatment page explains what official guidance describes. Do not use home remedies or supplements sold to “detox” lead.

Blood lead levels in pregnancy and breastfeeding

Lead can pass from mother to baby. The CDC’s Guidelines for the Identification and Management of Lead Exposure in Pregnant and Lactating Women (2010) do not recommend testing every pregnant woman; they recommend testing based on risk factors. They call for follow-up testing, education and environmental, nutritional and behavioral steps for every pregnant woman at 5 µg/dL or higher, and they recommend a venous sample for testing in pregnancy. The follow-up schedule:

Venous blood lead level in pregnancy	Follow-up testing (CDC 2010, Table 5-3)
Below 5 µg/dL	No follow-up testing indicated
5 to 14 µg/dL	Within 1 month; a maternal or cord blood lead level at delivery
15 to 24 µg/dL	Within 1 month, then every 2 to 3 months; a level at delivery
25 to 44 µg/dL	Within 1 to 4 weeks, then every month; a level at delivery
45 µg/dL or higher	Within 24 hours, then at frequent intervals; consultation with a clinician experienced in lead exposure in pregnancy is strongly advised

The same guidelines say pregnant women at 10 µg/dL or higher should be removed from occupational lead exposure. For breastfeeding, mothers below 40 µg/dL are encouraged to breastfeed; mothers with a confirmed level of 40 µg/dL or higher are advised to pump and discard their milk until their level drops below 40 µg/dL. If you are pregnant or nursing, your obstetric provider and your baby’s pediatrician decide what applies to you.

Blood lead levels for adults and workers

Most adults with a raised level were exposed at work (construction, battery recycling, firing ranges, smelting and similar jobs), through a hobby, a home renovation or a contaminated product. The national surveillance definition counts an adult venous result at or above 3.5 µg/dL as a case of “lead in blood,” and the NIOSH ABLES program uses 5 µg/dL to flag an elevated adult level. See lead testing for adults for when adults get tested.

For workers covered by OSHA’s lead standards, the law sets these blood lead triggers:

Rule	General industry (29 CFR 1910.1025)	Construction (29 CFR 1926.62)
Routine blood testing	At least every 6 months for covered workers	At least every 2 months for the first 6 months, then every 6 months
Test more often	At least every 2 months once a result is 40 µg/dL or higher, until two in a row are below 40	Same: every 2 months at 40 µg/dL or higher, until two in a row are below 40
Medical removal from lead work	A test and follow-up test at or above 60 µg/dL, or an average of the last three tests, or of all tests over the past 6 months (whichever covers the longer period), at or above 50 µg/dL, unless the last test was below 40	A test and follow-up test at or above 50 µg/dL
Return to the job	Two tests in a row below 40 µg/dL	Two tests in a row below 40 µg/dL

These are minimum legal requirements, not health targets. NIOSH’s guidance page notes that medical groups recommend acting much earlier: for example, California’s health department recommends retesting adults every 3 months at 3.5 to 9 µg/dL, and AOEC, ACOEM and California recommend medical removal after one result above 30 µg/dL. If you work with lead, tell your doctor.

Why a finger-stick result needs a second test

Lead dust on the skin can get into a finger-stick sample and make it read high, so the CDC recommends confirming a capillary result at or above 3.5 µg/dL with a venous draw. The national case definition works the same way: a single capillary result in a child counts as “suspect,” while a venous result, or two capillary results within 12 weeks, counts as “confirmed.”

Questions to ask your doctor about a lead result

Was this a capillary or a venous sample? Does it need a venous test to confirm it, and by when?
What is the exact number and unit, and how does it compare with my (or my child’s) earlier results?
When should the next test be?
Has the result been reported to the health department, and will they offer a home visit or environmental investigation?
Which sources should we look for first: old paint and dust, water, soil, a job or hobby, spices, cosmetics, remedies or dishes?
Should other family members, or a pregnant household member, be tested too?

Finding the source matters as much as the number. Our lead poisoning causes and prevention guide walks through the common ones, and lead poisoning symptoms explains why many people with lead in their blood have no symptoms at all. For the bigger picture, see the lead poisoning hub.

Frequently asked questions

What is a normal lead level in blood?

There is no known safe level. Most people in the US have low levels today, and the CDC uses 3.5 µg/dL as a reference value: a child at or above it has more lead than 97.5% of US children aged 1 to 5. A result below that is common, but it is not a guarantee of no harm.

What blood lead level is considered elevated?

For children, a level at or above the CDC reference value of 3.5 µg/dL. The national case definition uses 3.5 µg/dL for adults too, while the NIOSH ABLES program flags adults at 5 µg/dL. In pregnancy, CDC guidance starts follow-up at 5 µg/dL.

Is 2 µg/dL of lead in blood bad?

It is below the CDC reference value, so it does not trigger the follow-up for elevated levels. The CDC still says any detectable lead means exposure, so ask your doctor about likely sources.

Can I lower my blood lead level at home?

The main step official sources describe is stopping the exposure, which usually means finding the source with help from your health department or a lead poisoning test and home investigation. Any medical treatment is your doctor’s decision. Do not take supplements or products sold to remove lead without your doctor’s advice.

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