San Francisco vs Riverside Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 24, 2026, San Francisco, CA has cleaner air than Riverside, CA — AQI 52 (Moderate) vs 58 (Moderate), a gap of 6 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. San Francisco's reading is driven by PM2.5 and Riverside's by PM2.5.
San Francisco, CA
Moderate
Riverside, CA
Moderate
Summary
San Francisco has 6 points better air quality
San Francisco has an AQI of 52 compared to 58
Extra Protection for Riverside Homes
Air quality in Riverside is moderate (AQI 58), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
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5-Day Forecast Comparison
| Day | San Francisco | Riverside | Better |
|---|---|---|---|
| Today | AQI 55 | AQI 122 | San Francisco |