SmogRank / World / United States / Pennsylvania / October 2023
Most polluted cities in Pennsylvania, United States, October 2023
28 cities in Pennsylvania, United States ranked by their average PM2.5 over the 31 days. Worst: Bensalem at 11.5 µg/m³, #192 of 1,965 cities in the world. Cleanest: Erie at 4.3. 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%
- 2New Holland 0%
- 3Philadelphia 0%
- 4West Mifflin 0%
- 5Lancaster 0%
- 6Beaver Falls 0%
- 6Lebanon 0%
- 8Kennett Square 0%
- 9Harrisburg 0%
- 10Jefferson Hills 0%
- 10Pittsburgh 0%
- 12Bethlehem 0%
- 13Norristown 0%
- 13Scranton 0%
- 15Wyomissing 0%
- 16Allentown 0%
- 16Wilkinsburg 0%
- 18Uniontown 0%
- 19Schlusser 0%
- 20Monessen 0%
- 20New Brighton 0%
- 20Kennedy Township 0%
- 23Greensburg 0%
- 24Altoona 0%
- 25Canonsburg 0%
- 25State College 0%
- 27Hermitage 0%
- 28Erie 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, October 2023, smogrank.com/us/region/pennsylvania/history/2023-10 (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.