Contra Costa County, CA
ZIP 94804
In ZIP 94804, 8 of the 12 things we check have at least one part graded D or F.
- Drinking water: East Bay Mud meets every EPA legal limit; 13 contaminants are above health goals, led by lead at 48× California’s Public Health Goal.
- Nearest Superfund site: Liquid Gold Oil Corp., 1.6 miles away (3 within 10 miles).
- Largest share of modeled toxic air from industry: Bio-Rad Laboratories Inc (85%), mostly acrylamide.
- Fine particles (PM2.5) average 9.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
- About 98,092 kg of agricultural pesticides are applied in the county each year.
Grades for ZIP 94804
- Superfund sites nearbyD to F
- Factories and industrial sitesD to F
- Oil and gas wellsA
- Parks and nature nearbyC to F
- Air qualityD to F
- Drinking water qualityF
- Pesticide useC to D
- Neighborhood health statusA to D
- Past wildfire impactsA
- Past flood impactsA
- Noise levelsA to D
- Radiation signalsB to C
Based on 12 census tracts · compiled September 10, 2026 · how each grade works and its sources
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