SmogRank / World / United States / Pennsylvania / February 2025
Most polluted cities in Pennsylvania, United States, February 2025
31 cities in Pennsylvania, United States ranked by their average PM2.5 over the 28 days. Worst: Beaver Falls at 9.7 µg/m³, #1,212 of 2,574 cities in the world. Cleanest: Uniontown at 5.0. A city needs measurements on 70% of the days to be ranked.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Beaver Falls 0%
- 2Harrisburg 0%
- 2New Holland 0%
- 4Philadelphia 0%
- 5Schlusser 0%
- 5West Mifflin 0%
- 7Wyomissing 0%
- 8Lebanon 0%
- 9Allentown 0%
- 9Lancaster 0%
- 11Bensalem 0%
- 12Hershey 0%
- 13Kennedy Township 0%
- 14Wilkinsburg 0%
- 15York 0%
- 15Bethlehem 0%
- 17Pittsburgh 0%
- 18New Brighton 0%
- 18Norristown 0%
- 20Kennett Square 0%
- 21Johnstown 0%
- 21Scranton 0%
- 23Greensburg 0%
- 23Hermitage 0%
- 25Jefferson Hills 0%
- 26Monessen 0%
- 27Altoona 0%
- 27Erie 0%
- 27State College 0%
- 30Canonsburg 0%
- 31Uniontown 0%
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
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SmogRank, most polluted cities in Pennsylvania, United States, PM2.5, February 2025, smogrank.com/us/region/pennsylvania/history/2025-02 (accessed 6 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.