Lead
Lead harms how children learn and grow. There is no safe level — and most children who have it show no signs at all.
Draft — not yet medically reviewed
Emergency possible
If this is happening now
This information is not a substitute for talking with your child's doctor.
Poison emergency? Call Poison Help at 1-800-222-1222.
Here in our region
Our region has a mining and smelting history, and several communities have had large residential soil cleanups: Leadville and north Denver in Colorado, the Butte and Anaconda areas in Montana, and Eureka in Utah. Most of those residential cleanups are finished — but finished does not mean forgotten. Some properties were never accessible, and some sites keep soil caps that are meant to stay undisturbed. Butte still runs an active Residential Metals Abatement Program that will test soil and dust in your home. Older housing remains the most common source anywhere in the six states, and lead can come home on work clothes from mining, smelting, battery work or shooting ranges.
The short version
- CDC's blood lead reference value is 3.5 µg/dL (updated 2021, from 5). No safe blood lead level has been identified in children.
- A capillary result at or above the BLRV requires venous confirmation — capillary specimens are prone to environmental contamination.
- CMS requires screening at 12 and 24 months for Medicaid-enrolled children, and at 24–72 months for any child not previously tested. CMS is explicit: "Completion of a risk assessment questionnaire does not meet the Medicaid requirement."
- Most affected children are asymptomatic. Do not use symptoms to decide whether to test.
Confirm and follow up
Recommended timeframe for obtaining a confirmatory venous sample, by capillary result:
| BLL (µg/dL) | Confirm within |
|---|---|
| 3.5 – 9 | 3 months |
| 10 – 19 | 1 month |
| 20 – 44 | 2 weeks |
| ≥ 45 | 48 hours |
At ≥ 45 µg/dL, chelation may be indicated — consult a medical toxicologist before initiating. That call reaches us 24/7 through the Rocky Mountain Poison & Drug Safety Center.
Assess and treat iron deficiency where present. Report per your state's requirements and coordinate environmental investigation through the state or local health department.
What the evidence supports
Population-level associations between low-level lead exposure and cognitive outcomes are robust. They do not translate into an individual prognosis for a particular child with a particular result, and families often arrive having read them as though they do. Saying so plainly is usually more reassuring than hedging.
What families and the media are asking about
- Individual prognosis at low levels. See above — population risk is not individual prediction.
- Nutritional supplementation. Iron repletion matters if the child is deficient. Calcium and vitamin C are not treatments for lead burden.
- Direct-to-consumer chelation. Marketed widely, indicated rarely. Families ask.
- A confusing pair of numbers. EPA's October 2025 residential soil guidance uses 200/600 ppm with a 5 µg/dL blood lead target, while CDC's reference value is 3.5 µg/dL. Different instruments for different jobs — worth explaining if you cite either, because the mismatch looks like disagreement.
Handouts
TODO — awaiting PEHSU patient education materials. The parent view of this page is written at roughly an 8th-grade level and prints on one sheet in the meantime.
Resources
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Lead gets into the body quietly
Lead is a metal that was used for decades in house paint, water pipes and gasoline. It has no taste and no smell. When even a small amount gets into a child's body — usually from dust, soil or water — it can affect how they learn, pay attention and grow.
Most children with lead in their blood look and feel completely fine. That is the whole problem. A blood test is the only way to know.
Who is most at risk
Children under six are most at risk, and children under three most of all — they are on the floor and everything goes in the mouth. Risk is higher if:
- Your home was built before 1978, when lead paint was still sold
- Paint anywhere is chipping, peeling or on a window that rubs when it opens
- Bare soil sits where your child plays
- Someone in the house works with lead — mining, smelting, batteries, radiators, construction, or shooting ranges — or reloads ammunition at home
- You use imported spices, cosmetics, pottery or traditional remedies
Lead also crosses the placenta, so pregnancy matters too.
Do not wait for symptoms
There usually are none. When there are, they are vague and easy to blame on something else: stomach aches, low appetite, constipation, low energy, irritability.
Symptoms are not a screening tool. If your child is in one of the groups above, ask for the test.
Five things that make a real difference
- Ask your child's doctor for a blood lead test. It is quick. Children on Medicaid are required to be tested at 12 and 24 months — a questionnaire does not count as the test.
- Wet-wipe floors, window sills and toys. A damp cloth picks lead dust up. Dry sweeping and dusting move it around.
- Run the cold tap before drinking or mixing formula. Let it run until it turns cold. Never use hot tap water for a bottle.
- Shoes off at the door, hands washed before eating. This keeps yard and street soil out of the house and out of small mouths.
- Cover bare dirt where your child plays. Grass, mulch or a mat is enough.
When to get help now
If your child swallowed something that might contain lead — a piece of jewellery, a fishing weight, a painted toy — call Poison Help at 1-800-222-1222 right away. They answer 24 hours a day, free.
For a test result you do not understand, or a question about your home, ask us. Consultation is free.
“My child's result came back at 4. Is that bad?”
A result at or above 3.5 µg/dL is higher than most children in the United States and is worth acting on. It is not a poisoning emergency, and it does not mean permanent harm.
What it does mean is that it is worth finding where the lead is coming from and testing again. Your child's doctor can arrange that follow-up, and we can help either of you think it through.