San Luis Obispo County, California

AQI 51 · Moderate

YearMonth

51

Median AQI

69

90th Percentile

119

Max AQI

273

Days with Data

Ranked #34 of 46 counties in California (by median AQI, lower is better)

Monthly Median AQI — 2025

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AQI Category Breakdown

Adjacent Counties

Kern County Kings County Monterey County Santa Barbara County

External Links

San Luis Obispo County, California on Wikipedia