San Francisco vs Sacramento Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 24, 2026, San Francisco, CA has cleaner air than Sacramento, CA — AQI 52 (Moderate) vs 57 (Moderate), a gap of 5 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. San Francisco's reading is driven by PM2.5 and Sacramento's by PM2.5.
San Francisco, CA
Moderate
Sacramento, CA
Moderate
Summary
San Francisco has 5 points better air quality
San Francisco has an AQI of 52 compared to 57
Extra Protection for Sacramento Homes
Air quality in Sacramento is moderate (AQI 57), 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.
Compare top-rated True-HEPA purifiers:
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5-Day Forecast Comparison
| Day | San Francisco | Sacramento | Better |
|---|---|---|---|
| Today | AQI 55 | AQI 51 | Sacramento |