Contra Costa County, CA
ZIP 94517
In ZIP 94517, 9 of the 12 things we check have at least one part graded D or F.
- Drinking water: Doubletree Ranch Water System has 1 contaminant at or over an EPA legal limit; 5 contaminants are above health goals, led by lead at 71× California’s Public Health Goal.
- Nearest Superfund site: Concord Naval Weapons Station, 5.9 miles away.
- Largest share of modeled toxic air from industry: Shell Catalysts & Technologies - Pittsburg (19%), mostly nickel compounds.
- Fine particles (PM2.5) average 8.5 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 94517
- Superfund sites nearbyC to F
- Factories and industrial sitesB to D
- Oil and gas wellsA to C
- Parks and nature nearbyB to D
- Air qualityB to D
- Drinking water qualityD to F
- Pesticide useC to D
- Neighborhood health statusB to C
- Past wildfire impactsA to F
- Past flood impactsA to B
- Noise levelsA to D
- Radiation signalsC to D
Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources
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