Trinity County, CA

ZIP 96046

In ZIP 96046, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Trinity Co. W.w. Dist #1 meets every EPA legal limit; 6 contaminants are above health goals, led by lead at 43× California’s Public Health Goal.
• 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: J.F. Shea Construction Inc. Aggregate Products (99%), mostly lead compounds.
• Fine particles (PM2.5) average 9.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 2,105 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 96046

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityF
• Drinking water qualityF
• Pesticide useD
• Neighborhood health statusD
• Past wildfire impactsF
• Past flood impactsA
• Noise levelsA
• Radiation signalsB

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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