SmogRank / World / United States / Ohio / June 2025
Most polluted cities in Ohio, United States, June 2025
27 cities in Ohio, United States ranked by their average PM2.5 over the 30 days. Worst: Oregon at 16.9 µg/m³, #311 of 2,453 cities in the world. Cleanest: Dent at 8.8. 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.
- 1Maumee 10%
- 2Oregon 7%
- 3Toledo 7%
- 4Youngstown 4%
- 5Wheelersburg 3%
- 5Canton 3%
- 7Warren 3%
- 8Akron 3%
- 9Steubenville 0%
- 10Westerville 0%
- 11Columbus 0%
- 12Middletown 0%
- 13Cleveland 0%
- 14Springfield 0%
- 15Lima 0%
- 16Dayton 0%
- 17Norwood 0%
- 18Cincinnati 0%
- 19Cleveland Heights 0%
- 19Warrensville Heights 0%
- 21Dublin 0%
- 22Medina 0%
- 22Painesville 0%
- 24New Albany 0%
- 25Lebanon 0%
- 26Sharonville 0%
- 27Dent 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, June 2025, smogrank.com/us/region/ohio/history/2025-06 (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.