San Jose vs Irvine Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 23, 2026, Irvine, CA has cleaner air than San Jose, CA — AQI 62 (Moderate) vs 63 (Moderate), a gap of 1 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. San Jose's reading is driven by PM2.5 and Irvine's by PM2.5.
San Jose, CA
Moderate
Irvine, CA
Moderate
Summary
Irvine has 1 points better air quality
Irvine has an AQI of 62 compared to 63
Extra Protection for San Jose Homes
Air quality in San Jose is moderate (AQI 63), 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 Jose | Irvine | Better |
|---|---|---|---|
| Today | AQI 54 | AQI 47 | Irvine |