Lead Paint Risk in Mariposa County, California

37.8%Pre-1978 Housing
3,700Pre-1978 Units
9,796Total Housing Units
6Census Tracts

How to Interpret This

This is an area-level screening signal based on Census housing-age data. It does not confirm lead paint in any specific home. Homes built before 1978 may contain lead-based paint, and certified inspection or testing is the only way to confirm a property-level hazard.

Reporter / Resident Story Kit

  • 3,700 housing units in Mariposa County were built before 1978.
  • The county's pre-1978 housing share is 37.8%, compared with the state rate of 56.7%.
  • Local questions: Which neighborhoods have the oldest housing stock? Are lead-safe renovation resources available? Do renters and families with young children know how to request testing?

Highest-Risk Census Tracts

Individual census tracts ranked by pre-1978 housing percentage. Showing the top 6 of 6 tracts; download the full county tract CSV.

TractPre-1978TotalRisk Rate1970s1960s1950s1940s≤1939
Census Tract 47041,03967.8%15592182140135
Census Tract 1.018691,92245.2%29713718018372
Census Tract 3.026561,46444.8%378145812527
Census Tract 26562,05831.9%31821682040
Census Tract 1.023431,30526.3%2302768117
Census Tract 3.014722,00823.5%207161362543