Stockton vs Modesto Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 23, 2026, Stockton, CA has cleaner air than Modesto, CA — AQI 55 (Moderate) vs 59 (Moderate), a gap of 4 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. Stockton's reading is driven by PM10 and Modesto's by PM10.
Stockton, CA
Moderate
Modesto, CA
Moderate
Summary
Stockton has 4 points better air quality
Stockton has an AQI of 55 compared to 59
Extra Protection for Modesto Homes
Air quality in Modesto is moderate (AQI 59), with particle pollution 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.
Compare top-rated True-HEPA purifiers:
Prices are approximate and subject to change. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.
5-Day Forecast Comparison
| Day | Stockton | Modesto | Better |
|---|---|---|---|
| Today | AQI 50 | AQI 50 | Tie |
| Wed, Sep 23 | AQI 53 | AQI 67 | Stockton |