San Jose vs Modesto Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of November 8, 2026, San Jose, CA has cleaner air than Modesto, CA — AQI 48 (Good) vs 64 (Moderate), a gap of 16 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 PM2.5.
San Jose, CA
Good
Modesto, CA
Moderate
Summary
San Jose has 16 points better air quality
San Jose has an AQI of 48 compared to 64
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Air quality in Modesto is moderate (AQI 64), 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 | Modesto | Better |
|---|---|---|---|
| Today | AQI 55 | AQI 60 | San Jose |