SmogRank / World / United States / Ohio / November 2025
Most polluted cities in Ohio, United States, November 2025
27 cities in Ohio, United States ranked by their average PM2.5 over the 30 days. Worst: Middletown at 9.4 µg/m³, #1,136 of 2,662 cities in the world. Cleanest: Painesville at 5.0. 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.
- 1Middletown 0%
- 2Norwood 0%
- 3Westerville 0%
- 4Wheelersburg 0%
- 5Columbus 0%
- 6Canton 0%
- 7Warren 0%
- 8Dayton 0%
- 8Steubenville 0%
- 10Cincinnati 0%
- 11Akron 0%
- 11Oregon 0%
- 13Springfield 0%
- 13Dublin 0%
- 13Maumee 0%
- 16Cleveland 0%
- 17Dent 0%
- 17Lebanon 0%
- 17Toledo 0%
- 20Youngstown 0%
- 21Warrensville Heights 0%
- 22Lima 0%
- 22Medina 0%
- 24Sharonville 0%
- 24Shaker Heights 0%
- 26Cleveland Heights 0%
- 27Painesville 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, November 2025, smogrank.com/us/region/ohio/history/2025-11 (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.