Preventing lead poisoning comes down to controlling a handful of known exposure routes: paint in older homes, contaminated water, soil, certain imported products, and workplace dust brought home on clothing. No level of lead exposure is considered safe, and the CDC now flags children with blood lead levels at or above 3.5 micrograms per deciliter, a threshold that captures the top 2.5% of U.S. children ages 1 to 5. The good news is that most lead exposure is preventable with straightforward steps.
Manage Paint in Pre-1978 Homes
Lead-based paint is the single largest source of lead exposure for children in the United States. Homes built before 1978, the year the federal government banned lead paint for residential use, may still have layers of it on walls, trim, windows, and doors. Intact lead paint that isn’t peeling or chipping poses less immediate risk. The danger spikes when paint deteriorates or when renovations disturb it, sending invisible lead dust into the air and onto surfaces where children play and eat.
If you’re planning any renovation, repair, or painting project in a pre-1978 home, federal law requires contractors to follow EPA lead-safe work practices. These include sealing off the work area so dust and debris can’t spread to the rest of the house, using power tools only with HEPA-filtered exhaust, and never using open-flame torches to strip old paint. After the work is done, the area must be thoroughly cleaned and verified before anyone moves back in. Hiring a contractor certified under the EPA’s Renovation, Repair and Painting (RRP) program isn’t optional for these jobs; it’s a legal requirement.
Between renovations, keep painted surfaces in good condition. Wipe windowsills and floors regularly with a damp cloth or mop, since dry sweeping just moves lead dust around. If paint is peeling in areas your child can reach, cover or seal those surfaces until professional abatement is possible.
Reduce Lead in Your Drinking Water
Lead doesn’t typically come from the water supply itself. It leaches from older lead pipes, solder, and fixtures between the water main and your tap. In October 2024, the EPA finalized the Lead and Copper Rule Improvements, requiring water systems nationwide to identify and replace lead service lines within 10 years. But that timeline means millions of homes will still have lead plumbing for years to come.
The most effective immediate step is a water filter certified to meet NSF/ANSI Standard 53 for lead reduction. For pitcher, faucet-mount, and under-sink models, look for that specific standard number on the packaging or product listing. If you’re considering a reverse osmosis system, check for NSF/ANSI Standard 58 certification instead. Not all water filters remove lead, so the certification matters more than the brand name.
A few daily habits also help. Run cold water for 30 seconds to two minutes before using it for drinking or cooking, especially first thing in the morning or anytime the tap hasn’t been used for several hours. This flushes out water that’s been sitting in contact with pipes. Always use cold water for cooking and preparing baby formula, since hot water dissolves more lead from plumbing.
Cover Contaminated Soil
Soil near older homes, busy roads, and former industrial sites can hold lead from decades of paint chips, leaded gasoline exhaust, and industrial emissions. Children who play in bare dirt can ingest lead through hand-to-mouth contact or by breathing in fine dust particles.
For yards with low to moderate lead levels, the EPA recommends interim controls: planting grass, laying sod, or covering bare patches with several inches of clean soil or mulch. These barriers prevent direct contact and keep lead-laden dust from becoming airborne. If your yard has bare soil near an older home’s foundation, where exterior paint flakes tend to accumulate, covering that strip with mulch or ground cover is a high-impact, low-cost move. Have children remove shoes before coming inside, and keep play areas away from bare soil when possible.
Watch for Lead in Consumer Products
Certain imported products carry surprisingly high lead levels. Traditional eyeliners sold under names like kohl, kajal, surma, and tiro often contain large amounts of lead and other heavy metals. The FDA does not allow these products to be sold in the U.S., but they’re still brought in informally or purchased online. They’ve been directly linked to lead poisoning in children, who are exposed when adults apply the product to their eyes or when the product contaminates hands and surfaces.
Imported spices, candies, and ceramics are other common sources. Some chili and turmeric powders from South Asia, Latin America, and parts of Africa have tested positive for lead, sometimes added intentionally as a coloring agent. For cosmetics generally, the FDA recommends lead levels stay below 10 parts per million. When buying imported goods, especially spices, pottery intended for food, and children’s toys, purchasing from established retailers with supply chain oversight reduces your risk.
Use Nutrition as a Shield
What your child eats won’t remove lead already in the body, but a diet rich in certain nutrients can reduce how much new lead the gut absorbs. Iron is the most important player here. Lead and iron use the same transport channel to cross from the intestine into the bloodstream. When iron stores are full, that transporter is occupied, leaving less room for lead to hitch a ride. Children who are iron-deficient absorb significantly more lead from the same exposure.
Calcium works through a similar competitive mechanism, blocking one of the pathways lead uses to enter cells. Vitamin C boosts iron absorption, making dietary iron more available to occupy those shared transporters. In practical terms, this translates to a daily serving of lean red meat or other iron-rich protein for older children, two servings of dairy or calcium-rich foods, and two servings of fruit or fruit juice. Making sure children eat regular meals also matters, because lead is absorbed more readily on an empty stomach.
Prevent Take-Home Exposure From Work
People who work with lead in construction, battery manufacturing, painting, or demolition can unknowingly carry lead dust home on their skin, hair, and clothing. OSHA requires employers to provide separate clean and dirty changing areas so workers never mix their street clothes with contaminated work gear. Contaminated clothing must never be taken home for laundering.
If you work in a lead-exposed trade, the daily routine should look like this: at the end of your shift, remove disposable coveralls and shoe covers and place them with lead waste. Put all contaminated clothing, including work shoes, into a closed container provided by your employer for professional laundering. Shower and wash your hair before changing into street clothes. This sequence keeps lead at the job site instead of in your car, on your couch, and on your children’s hands.
Get Children Tested at the Right Time
Lead poisoning rarely produces obvious symptoms at lower levels, which is why blood testing is the only reliable way to catch it. Most pediatricians screen children at ages 1 and 2, or whenever risk factors are present, like living in a pre-1978 home or a zip code with known lead problems.
The initial screening is usually a capillary test, a quick finger prick done in the office. These results come back fast but can read falsely high if any lead on the child’s skin contaminates the sample. If the result comes back at or above the CDC’s 3.5 microgram reference value, a second test drawn from a vein confirms the finding. The urgency of that follow-up depends on the level: results between 3.5 and 9 micrograms should be confirmed within three months, levels of 10 to 19 within one month, 20 to 44 within two weeks, and anything at or above 45 micrograms within 48 hours.
Venous blood draws are more accurate, particularly at detecting lower lead levels, and are considered the gold standard for diagnosis. If your child’s screening comes back elevated, the confirmation step isn’t just a formality. It determines what happens next and how quickly intervention begins.