SmogRank / World / United States / Ohio / September 2023
Most polluted cities in Ohio, United States, September 2023
24 cities in Ohio, United States ranked by their average PM2.5 over the 30 days. Worst: Columbus at 9.2 µg/m³, #718 of 2,128 cities in the world. Cleanest: Lima at 4.5. 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.
- 1Columbus 0%
- 2Cleveland 0%
- 3Middletown 0%
- 4Norwood 0%
- 5Canton 0%
- 6Warren 0%
- 7Cincinnati 0%
- 7Springfield 0%
- 9Westerville 0%
- 10Dayton 0%
- 11Akron 0%
- 12Dent 0%
- 12Youngstown 0%
- 14Dublin 0%
- 15Lebanon 0%
- 15Painesville 0%
- 17Wheelersburg 0%
- 17Steubenville 0%
- 19Medina 0%
- 20Sharonville 0%
- 21Warrensville Heights 0%
- 22New Albany 0%
- 23Toledo 0%
- 24Lima 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 Ohio, United States, PM2.5, September 2023, smogrank.com/us/region/ohio/history/2023-09 (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.