San Jose vs Modesto Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 23, 2026, San Jose, CA has cleaner air than Modesto, CA — AQI 57 (Moderate) vs 59 (Moderate), a gap of 2 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. San Jose's reading is driven by PM2.5 and Modesto's by PM10.
San Jose, CA
Moderate
Modesto, CA
Moderate
Summary
San Jose has 2 points better air quality
San Jose has an AQI of 57 compared to 59
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5-Day Forecast Comparison
| Day | San Jose | Modesto | Better |
|---|---|---|---|
| Today | AQI 54 | AQI 50 | Modesto |
| Wed, Sep 23 | AQI 51 | AQI 67 | San Jose |