Lead risk in Los Angeles, building by building.

This is the lead-risk map taken all the way down to individual homes, shown here in the Boyle Heights neighborhood. Each dot is a real property from the Los Angeles County Assessor's records, colored by the decade it was built. Older homes are far more likely to contain lead paint, so the age of a building is a strong first guess at where the hazards are. In Boyle Heights, more than three out of four homes were built before 1940. A lead program could take this same map, match it against the addresses of the families it already serves, and get back a clear list of which homes to check first.

4,339
residential parcels scored, LA County open data
77%
built before 1940
$0
data cost, county records
Boyle Heights, Los Angeles (ZIP 90033). Each dot is one property, colored by lead-paint era. Hover any building.
pre-1940 1940-1959 1960-1977 1978+

Start with the oldest homes

These are the highest-priority parcels in the neighborhood, ranked by how likely they are to contain lead paint. A program would match this list against the families it serves to decide which doors to knock on first.
Address Built Lead-paint likelihood
1511 Bridge St 1879 90% (pre-1940)
1320 Pleasant Ave 1880 90% (pre-1940)
1432 Warren St 1880 90% (pre-1940)
718 N Breed St 1880 90% (pre-1940)
1914 Pennsylvania Ave 1882 90% (pre-1940)
1417 Pleasant Ave 1882 90% (pre-1940)
1411 Pleasant Ave 1882 90% (pre-1940)
1532 Bridge St 1883 90% (pre-1940)
1933 E 2Nd St 1883 90% (pre-1940)
1431 Mitchell Pl 1884 90% (pre-1940)
317 N Mathews St 1884 90% (pre-1940)
1321 Mono St 1885 90% (pre-1940)
1501 Bridge St 1885 90% (pre-1940)
626 Gillette St 1885 90% (pre-1940)

This shows you where to look first, not which homes definitely have lead. A quick field test is what confirms the hazard in any specific home.

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Built from the Los Angeles County Assessor parcel service (data.lacounty.gov). Year built is an assessor value used for era bucketing. Lead-paint-by-era rates from the HUD National Survey of Lead and Allergens in Housing. This is a screening tool that shows where to look first, not a diagnosis of any specific home. Fluoro-Spec Inc. eric@fluorospect.com · 631-461-1838. See Safety & Compliance.