Miami vs Atlanta Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 23, 2026, Miami, FL has cleaner air than Atlanta, GA — AQI 29 (Good) vs 40 (Good), a gap of 11 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. Miami's reading is driven by O3 and Atlanta's by O3.
Miami, FL
Good
Atlanta, GA
Good
Summary
Miami has 11 points better air quality
Miami has an AQI of 29 compared to 40
Reduce Indoor Ozone in Atlanta
Today's main pollutant in Atlanta is ground-level ozone (AQI 40). 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 | Miami | Atlanta | Better |
|---|---|---|---|
| Today | AQI 28 | AQI 45 | Miami |
| Wed, Sep 23 | AQI 30 | AQI 39 | Miami |