San Diego vs Irvine Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 23, 2026, San Diego, CA has cleaner air than Irvine, CA — AQI 58 (Moderate) vs 62 (Moderate), a gap of 4 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. San Diego's reading is driven by PM2.5 and Irvine's by PM2.5.
San Diego, CA
Moderate
Irvine, CA
Moderate
Summary
San Diego has 4 points better air quality
San Diego has an AQI of 58 compared to 62
Extra Protection for Irvine Homes
Air quality in Irvine is moderate (AQI 62), 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 | Irvine | Better |
|---|---|---|---|
| Today | AQI 55 | AQI 47 | Irvine |