SmogRank / World / United States / Pennsylvania / July 2024
Most polluted cities in Pennsylvania, United States, July 2024
30 cities in Pennsylvania, United States ranked by their average PM2.5 over the 31 days. Worst: West Mifflin at 10.2 µg/m³, #658 of 2,519 cities in the world. Cleanest: Erie at 6.9. 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.
- 1West Mifflin 0%
- 2Philadelphia 0%
- 3Hershey 0%
- 3New Holland 0%
- 5Monessen 0%
- 6Harrisburg 0%
- 7Pittsburgh 0%
- 8Scranton 0%
- 9Bensalem 0%
- 9Greensburg 0%
- 11Uniontown 0%
- 12Jefferson Hills 0%
- 13Allentown 0%
- 14Wilkinsburg 0%
- 14Wyomissing 0%
- 16Lebanon 0%
- 17Kennett Square 0%
- 17Norristown 0%
- 17Kennedy Township 0%
- 20Beaver Falls 0%
- 21Johnstown 0%
- 22Schlusser 0%
- 23York 0%
- 23Altoona 0%
- 23Bethlehem 0%
- 26Lancaster 0%
- 27Hermitage 0%
- 27New Brighton 0%
- 27State College 0%
- 30Erie 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 2024, smogrank.com/us/region/pennsylvania/history/2024-07 (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.