Riverside County, CA

ZIP 92881

In ZIP 92881, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Riverside, City Of has 2 contaminants at or over an EPA legal limit; 21 contaminants are above health goals, led by lead at 37× California’s Public Health Goal.
• Closer to Superfund sites than 59% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (60%), mostly ethylene oxide.
• Fine particles (PM2.5) average 10.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 1,172,577 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 92881

• Superfund sites nearbyA to C
• Factories and industrial sitesB to D
• Oil and gas wellsA to F
• Parks and nature nearbyB to F
• Air qualityA to F
• Drinking water qualityD to F
• Pesticide useD to F
• Neighborhood health statusA to C
• Past wildfire impactsA to F
• Past flood impactsA to C
• Noise levelsA to D
• Radiation signalsC to D

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

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