SmogRank / World / United States / Ohio / January 2025
Most polluted cities in Ohio, United States, January 2025
27 cities in Ohio, United States ranked by their average PM2.5 over the 31 days. Worst: Middletown at 10.3 µg/m³, #934 of 2,426 cities in the world. Cleanest: Cleveland Heights at 6.5. 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.
- 1Middletown 0%
- 2Toledo 0%
- 3New Albany 0%
- 3Oregon 0%
- 5Dublin 0%
- 6Steubenville 0%
- 7Norwood 0%
- 8Westerville 0%
- 9Columbus 0%
- 10Cleveland 0%
- 11Dent 0%
- 12Dayton 0%
- 12Canton 0%
- 14Lebanon 0%
- 14Wheelersburg 0%
- 14Maumee 0%
- 17Warrensville Heights 0%
- 17Warren 0%
- 19Medina 0%
- 20Akron 0%
- 21Cincinnati 0%
- 21Youngstown 0%
- 23Springfield 0%
- 24Lima 0%
- 25Painesville 0%
- 26Sharonville 0%
- 27Cleveland Heights 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
All cities in the world, January 2025 · All cities in United States, January 2025 · Ohio now
Use this board
SmogRank, most polluted cities in Ohio, United States, PM2.5, January 2025, smogrank.com/us/region/ohio/history/2025-01 (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.