Riverside County, California

AQI 87 · Moderate

YearMonth

87

Median AQI

154

90th Percentile

365

Max AQI

274

Days with Data

Ranked #45 of 46 counties in California (by median AQI, lower is better)

Monthly Median AQI — 2025

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AQI Category Breakdown

Adjacent Counties

La Paz County, Arizona Imperial County Orange County San Bernardino County San Diego County

External Links

Riverside County, California on Wikipedia