Every county in America, scored for how likely childhood lead exposure is, built from public Census data on housing age and poverty. The same method public-health researchers use, made current, complete, and free.
3,222 counties and 83,388 census tracts. U.S. Census ACS 2022. No login, no paywall.
For a decade, people mapped where lead risk is highest. Then the public record started disappearing.
Before the data could vanish for good, we pulled it down and rebuilt the map the public version never finished: current, national, every neighborhood including rural, free.
Two public numbers predict the risk: the age of a neighborhood's housing and its poverty rate. Older homes carry lead paint and lead pipes; poverty tracks deferred maintenance and older stock. We pull both from the U.S. Census for every county and tract, weight the oldest housing the way the Washington State Department of Health does, and score each place against the rest of the country. A 2024 EPA study validated this exact approach against roughly 4 million children's measured blood-lead levels. No map can prove your own home is safe. It can only tell you the odds, which is why this one ends at a test.
Sources: Reuters, Off the Charts (2016) · EDGI, EJScreen removal (2025) · Public Environmental Data Partners (EJScreen mirror) · Zartarian et al., Environmental Science & Technology (2024) · NYU City Health Dashboard · U.S. Census American Community Survey 2022 5-year (tables B25034, B01003, S1701).
If your area runs high, you do not have to guess. Test your own dishes, cookware, and painted surfaces at home.
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