Contra Costa County, CA

ZIP 94530

In ZIP 94530, 4 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; 9 contaminants are above health goals, led by pfos at 1.4× California’s Public Health Goal.
• Nearest Superfund site: Liquid Gold Oil Corp., 1.8 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Bio-Rad Laboratories Inc (78%), mostly acrylamide.
• Fine particles (PM2.5) average 8.4 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 94530

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

Based on 12 census tracts · compiled October 25, 2026 · how each grade works and its sources

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