Minneapolis vs St. Paul Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 23, 2026, Minneapolis, MN and St. Paul, MN have effectively the same air quality — both at AQI 28 (Good) in the latest EPA AirNow observations. Minneapolis's reading is driven by O3 and St. Paul's by O3.
Minneapolis, MN
Good
St. Paul, MN
Good
Summary
Both cities have similar air quality
Reduce Indoor Ozone in St. Paul
Today's main pollutant in St. Paul is ground-level ozone (AQI 28). 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 | Minneapolis | St. Paul | Better |
|---|---|---|---|
| Today | AQI 35 | AQI 35 | Tie |
| Wed, Sep 23 | AQI 33 | AQI 33 | Tie |