SmogRank / World / United States / Ohio / July 2026

Most polluted cities in Ohio, United States, July 2026

28 cities in Ohio, United States ranked by their average PM2.5 over the 31 days. Worst: Maumee at 37.6 µg/m³, #78 of 2,751 cities in the world. Cleanest: Dent at 8.6. 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.

← Cleveland 16% 10%0

Every city in Ohio, United States ranked for July 2026, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.

1Cleveland
16%
2Steubenville
14%
3Maumee
13%
4Oregon
13%
5Toledo
13%
6Medina
13%
7Warren
13%
8Akron
13%
9Westerville
13%
10Canton
10%
11Warrensville Heights
10%
12Cleveland Heights
10%
13Shaker Heights
10%
14Youngstown
10%
15Columbus
10%
16Dayton
10%
17Lima
6%
18Springfield
6%
19Middletown
6%
20Painesville
6%
21New Albany
4%
22Dublin
3%
23Norwood
0%
24Cincinnati
0%
25Wheelersburg
0%
26Sharonville
0%
27Lebanon
0%
28Dent
0%

Good0–50

Moderate51–100

Sensitive groups101–150

Unhealthy151–200

Very unhealthy201–300

Hazardous301+

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 2026, smogrank.com/us/region/ohio/history/2026-07 (accessed 6 Oct 2026).

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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.