Contra Costa County, CA

ZIP 94597

In ZIP 94597, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Contra Costa Water District meets every EPA legal limit; 13 contaminants are above health goals, led by arsenic at 549× California’s Public Health Goal.
• Nearest Superfund site: Concord Naval Weapons Station, 8.6 miles away.
• Largest share of modeled toxic air from industry: Bio-Rad Laboratories Inc (27%), mostly acrylamide.
• Fine particles (PM2.5) average 8.2 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 94597

• Superfund sites nearbyC to D
• Factories and industrial sitesD
• Oil and gas wellsA to B
• Parks and nature nearbyB to C
• Air qualityC to D
• Drinking water qualityC
• Pesticide useB to D
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsB to C

Based on 9 census tracts · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…