Colusa County, CA

ZIP 95912

In ZIP 95912, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Del Oro Wc - Arbuckle District has 2 contaminants at or over an EPA legal limit; 12 contaminants are above health goals, led by pfda at 9.3× Preliminary Research (Under Review).
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Johns Manville (97%), mostly chromium compounds.
• Fine particles (PM2.5) average 8.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 916,603 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95912

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

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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