SmogRank / World / United States / Pennsylvania / May 2024
Most polluted cities in Pennsylvania, United States, May 2024
30 cities in Pennsylvania, United States ranked by their average PM2.5 over the 31 days. Worst: Bensalem at 10.2 µg/m³, #698 of 2,641 cities in the world. Cleanest: Monessen at 2.6. 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.
- 1Bensalem 0%
- 2Philadelphia 0%
- 2West Mifflin 0%
- 4New Holland 0%
- 5Beaver Falls 0%
- 6Harrisburg 0%
- 7York 0%
- 7Lebanon 0%
- 7Pittsburgh 0%
- 10Kennett Square 0%
- 10Norristown 0%
- 12Jefferson Hills 0%
- 12Wilkinsburg 0%
- 12Kennedy Township 0%
- 15Greensburg 0%
- 15Scranton 0%
- 17Erie 0%
- 17Lancaster 0%
- 19Allentown 0%
- 19New Brighton 0%
- 21Wyomissing 0%
- 22Bethlehem 0%
- 23Hermitage 0%
- 23Schlusser 0%
- 25Johnstown 0%
- 26Canonsburg 0%
- 27State College 0%
- 28Altoona 0%
- 29Uniontown 0%
- 30Monessen 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, May 2024, smogrank.com/us/region/pennsylvania/history/2024-05 (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.