San Diego vs Bakersfield Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 24, 2026, San Diego, CA has cleaner air than Bakersfield, CA — AQI 57 (Moderate) vs 67 (Moderate), a gap of 10 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. San Diego's reading is driven by PM2.5 and Bakersfield's by O3.
San Diego, CA
Moderate
Bakersfield, CA
Moderate
Summary
San Diego has 10 points better air quality
San Diego has an AQI of 57 compared to 67
Reduce Indoor Ozone in Bakersfield
Today's main pollutant in Bakersfield is ground-level ozone (AQI 67). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Compare activated-carbon purifiers (for gases & ozone):
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5-Day Forecast Comparison
| Day | San Diego | Bakersfield | Better |
|---|---|---|---|
| Today | AQI 56 | AQI 101 | San Diego |