Where lead is. Mapped, proven, free.

We built a national map that predicts childhood lead-exposure risk for every neighborhood in America, from public data alone, then checked it against real blood tests in eight states. It holds up. And a map only gets you so far, so it ends with a test you can actually run.

83,388
census tracts scored, every U.S. neighborhood
8
states validated against real blood lead
0.48-0.77
predicted vs measured agreement
$0
free, no login
The map
The national lead risk map
Every county and 83,388 census tracts, scored from public housing and poverty data. Find your neighborhood.
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The proof
Does it actually work?
We checked it against real measured blood lead in eight states. It tracks. See it side by side.
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The science
Read the white paper
The full method, the validation, the prevention economics, fully cited. For your epidemiologist.
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Deploy it
For lead programs
The map finds the risk. A cheap field test confirms it. A fiscal-year pilot your program can run now.
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What this is

Old housing carries lead paint and lead dust. Poverty tracks deferred maintenance and aging stock. Those two facts, which the U.S. Census already collects for every neighborhood, predict where childhood lead exposure concentrates, and a 2024 EPA study validated the approach against roughly 4 million children's blood tests. We made that prediction national, current, and free, then proved it against measured blood lead in eight states. The map points to the risky places. A cheap on-the-spot test confirms the hazard in a specific home before a child is exposed. The whole point is to find the lead before the child does.