Butte County, CA

ZIP 95966

In ZIP 95966, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Cal-Water Service Co.-Oroville has 2 contaminants at or over an EPA legal limit; 14 contaminants are above health goals, led by pfos at 31× California’s Public Health Goal.
• Nearest Superfund site: Koppers Co., Inc. (oroville Plant), 0.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Johns Manville (100%), mostly chromium compounds.
• Fine particles (PM2.5) average 9.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 514,803 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95966

• Superfund sites nearbyA to F
• Factories and industrial sitesA to C
• Oil and gas wellsA
• Parks and nature nearbyA to C
• Air qualityF
• Drinking water qualityA to F
• Pesticide useF
• Neighborhood health statusD to F
• Past wildfire impactsD to F
• Past flood impactsB
• Noise levelsA to D
• Radiation signalsB to C

Based on 11 census tracts · compiled October 25, 2026 · how each grade works and its sources

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