San Francisco vs Fresno Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 16, 2026, San Francisco, CA has cleaner air than Fresno, CA — AQI 36 (Good) vs 69 (Moderate), a gap of 33 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. San Francisco's reading is driven by PM2.5 and Fresno's by PM10.
San Francisco, CA
Good
Fresno, CA
Moderate
Summary
San Francisco has 33 points better air quality
San Francisco has an AQI of 36 compared to 69
Extra Protection for Fresno Homes
Air quality in Fresno is moderate (AQI 69), 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.
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5-Day Forecast Comparison
| Day | San Francisco | Fresno | Better |
|---|---|---|---|
| Today | AQI 44 | AQI 58 | San Francisco |
| Wed, Sep 16 | AQI 50 | AQI 60 | San Francisco |