SmogRank / World / United States / Pennsylvania / July 2025
Most polluted cities in Pennsylvania, United States, July 2025
27 cities in Pennsylvania, United States ranked by their average PM2.5 over the 31 days. Worst: Beaver Falls at 13.1 µg/m³, #595 of 2,832 cities in the world. Cleanest: York at 7.8. 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%
- 2West Mifflin 0%
- 3Kennedy Township 0%
- 4Natrona Heights 0%
- 5Wilkinsburg 0%
- 6Pittsburgh 0%
- 7Jefferson Hills 0%
- 8Erie 0%
- 9Uniontown 0%
- 9New Holland 0%
- 11Lebanon 0%
- 12Hermitage 0%
- 13Philadelphia 0%
- 13Hershey 0%
- 15Bensalem 0%
- 15Scranton 0%
- 17Harrisburg 0%
- 17Johnstown 0%
- 19New Brighton 0%
- 20Monessen 0%
- 21Lancaster 0%
- 22Norristown 0%
- 22Schlusser 0%
- 24Kennett Square 0%
- 25State College 0%
- 26Greensburg 0%
- 27York 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, July 2025, smogrank.com/us/region/pennsylvania/history/2025-07 (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.