San Diego vs Riverside Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of November 8, 2026, San Diego, CA has cleaner air than Riverside, CA — AQI 34 (Good) vs 56 (Moderate), a gap of 22 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. San Diego's reading is driven by O3 and Riverside's by PM2.5.
San Diego, CA
Good
Riverside, CA
Moderate
Summary
San Diego has 22 points better air quality
San Diego has an AQI of 34 compared to 56
Extra Protection for Riverside Homes
Air quality in Riverside is moderate (AQI 56), 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 Diego | Riverside | Better |
|---|---|---|---|
| Today | AQI 54 | AQI 50 | Riverside |