Highest Ozone
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| County | Site | Units | 8-Hour | Hour of Day | 1-Hour | Hour of Day |
|---|---|---|---|---|---|---|
| Outagamie | Appleton | ppb | 33.1 | 01 PM | 43.5 | 01 PM |
| Ashland | Bad River Tribal School | ppb | 41.7 | 01 PM | 43.2 | 01 PM |
| Milwaukee | Bayside | ppb | 28.4 | 01 PM | 35.1 | 01 PM |
| Rock | Beloit-Converse | ppb | 39.1 | 01 PM | 50.7 | 01 PM |
| Kenosha | Chiwaukee Prairie | ppb | 31.9 | 01 PM | 37.5 | 12 PM |
| Columbia | Columbus | ppb | 42.1 | 01 PM | 51.2 | 01 PM |
| Sauk | Devils Lake | ppb | 39.8 | 01 PM | 49.8 | 01 PM |
| Eau Claire | Eau Claire DOT Sign Shop | ppb | 27.6 | 01 PM | 47.4 | 01 PM |
| Walworth | Elkhorn | ppb | 38.1 | 01 PM | 52.2 | 01 PM |
| Fond du Lac | Fond Du Lac | ppb | 36.4 | 01 PM | 47.7 | 01 PM |
| Ozaukee | Grafton | ppb | 29.4 | 01 PM | 34.9 | 01 PM |
| Brown | Green Bay UW | ppb | 34.3 | 01 PM | 39.9 | 01 PM |
| Ozaukee | Harrington Beach Park | ppb | 29.1 | 01 PM | 34.9 | 01 PM |
| Dodge | Horicon Wildlife Area | ppb | 41.3 | 01 PM | 53.5 | 01 PM |
| Jefferson | Jefferson-Laatsch | ppb | 38.1 | 01 PM | 47.3 | 01 PM |
| Kenosha | Kenosha-Water Tower | ppb | 28.9 | 01 PM | 34 | 12 PM |
| Kewaunee | Kewaunee | ppb | 32.7 | 01 PM | 35.8 | 01 PM |
| La Crosse | La Crosse DOT | ppb | 23.6 | 01 PM | 39.7 | 01 PM |
| Marathon | Lake Dubay | ppb | 40.4 | 01 PM | 51.3 | 01 PM |
| Dane | Madison East | ppb | 39.8 | 01 PM | 49.3 | 01 PM |
| Manitowoc | Manitowoc | ppb | 30.1 | 01 PM | 33.7 | 01 PM |
| Milwaukee | Milwaukee-16th St. Health Center | ppb | 26.1 | 01 PM | 34.1 | 01 PM |
| Milwaukee | Milwaukee-SER DNR HQ | ppb | ||||
| Milwaukee | Milwaukee-UWM P&R | ppb | 28.9 | 01 PM | 36.6 | 01 PM |
| Door | Newport Park | ppb | 36.1 | 01 PM | 38.4 | 12 PM |
| Forest | Potawatomi | ppb | 36.9 | 01 PM | 41.8 | 12 PM |
| Racine | Racine-Payne & Dolan | ppb | 31.3 | 01 PM | 36.7 | 01 PM |
| Sheboygan | Sheboygan-Haven | ppb | 26.5 | 12 PM | 31.9 | 12 PM |
| Sheboygan | Sheboygan-Kohler Andrae | ppb | 27.6 | 01 PM | 33.2 | 01 PM |
| Vilas | Trout Lake | ppb | 39.2 | 01 PM | 45.3 | 01 PM |
| Waukesha | Waukesha-Cleveland Ave. | ppb | 34.9 | 01 PM | 49.4 | 12 PM |