SmogRank / World / United States / Ohio / July 2025
Most polluted cities in Ohio, United States, July 2025
23 cities in Ohio, United States ranked by their average PM2.5 over the 31 days. Worst: Cincinnati at 14.2 µg/m³, #461 of 2,832 cities in the world. Cleanest: Sharonville at 8.0. 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.
- 1Warren 6%
- 2Toledo 6%
- 3Dayton 3%
- 4Cincinnati 3%
- 5Dent 3%
- 6Steubenville 0%
- 7Cleveland 0%
- 8Canton 0%
- 9Springfield 0%
- 10Columbus 0%
- 11Youngstown 0%
- 12Westerville 0%
- 13Wheelersburg 0%
- 13Cleveland Heights 0%
- 13Warrensville Heights 0%
- 16Akron 0%
- 17Medina 0%
- 18Dublin 0%
- 19Lima 0%
- 20Painesville 0%
- 21Lebanon 0%
- 22New Albany 0%
- 23Sharonville 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, July 2025, smogrank.com/us/region/ohio/history/2025-07 (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.