Philadelphia vs Allentown Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of November 8, 2026, Philadelphia, PA has cleaner air than Allentown, PA — AQI 26 (Good) vs 28 (Good), a gap of 2 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. Philadelphia's reading is driven by O3 and Allentown's by O3.
Philadelphia, PA
Good
Allentown, PA
Good
Summary
Philadelphia has 2 points better air quality
Philadelphia has an AQI of 26 compared to 28
Reduce Indoor Ozone in Allentown
Today's main pollutant in Allentown 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 | Philadelphia | Allentown | Better |
|---|---|---|---|
| Today | AQI 30 | AQI 30 | Tie |
| Sun, Nov 8 | AQI 40 | AQI 30 | Allentown |