Modesto 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 Modesto, CA — AQI 56 (Moderate) vs 59 (Moderate), a gap of 3 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. Modesto's reading is driven by PM10 and Irvine's by PM2.5.
Modesto, CA
Moderate
Irvine, CA
Moderate
Summary
Irvine has 3 points better air quality
Irvine has an AQI of 56 compared to 59
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5-Day Forecast Comparison
| Day | Modesto | Irvine | Better |
|---|---|---|---|
| Today | AQI 50 | AQI 51 | Modesto |