Highest Ozone
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| County | Site | Units | 8-Hour | Hour of Day | 1-Hour | Hour of Day |
|---|---|---|---|---|---|---|
| Outagamie | Appleton | ppb | ||||
| Ashland | Bad River Tribal School | ppb | 49.9 | 04 PM | 53.5 | 03 PM |
| Milwaukee | Bayside | ppb | 47.2 | 05 PM | 50.7 | 03 PM |
| Rock | Beloit-Converse | ppb | 10.8 | 11 AM | 31.7 | 09 AM |
| Kenosha | Chiwaukee Prairie | ppb | 42.4 | 05 PM | 50.4 | 03 PM |
| Columbia | Columbus | ppb | 45.1 | 06 PM | 49.3 | 02 PM |
| Sauk | Devils Lake | ppb | ||||
| Eau Claire | Eau Claire DOT Sign Shop | ppb | 29.8 | 12 AM | 37.8 | 08 AM |
| Walworth | Elkhorn | ppb | ||||
| Fond du Lac | Fond Du Lac | ppb | 47.5 | 05 PM | 51.4 | 12 PM |
| Ozaukee | Grafton | ppb | 26.7 | 10 AM | 37.4 | 09 AM |
| Brown | Green Bay UW | ppb | 33.8 | 12 AM | 40.1 | 10 AM |
| Ozaukee | Harrington Beach Park | ppb | ||||
| Dodge | Horicon Wildlife Area | ppb | 48.3 | 06 PM | 51.7 | 12 PM |
| Jefferson | Jefferson-Laatsch | ppb | ||||
| Kenosha | Kenosha-Water Tower | ppb | 45.7 | 05 PM | 48.6 | 02 PM |
| Kewaunee | Kewaunee | ppb | ||||
| La Crosse | La Crosse DOT | ppb | ||||
| Marathon | Lake Dubay | ppb | 41 | 12 AM | 39 | 03 AM |
| Dane | Madison East | ppb | 44 | 05 PM | 48.1 | 02 PM |
| Manitowoc | Manitowoc | ppb | ||||
| Milwaukee | Milwaukee-16th St. Health Center | ppb | ||||
| Milwaukee | Milwaukee-UWM UPark | ppb | 48.4 | 05 PM | 52.8 | 01 PM |
| Door | Newport Park | ppb | ||||
| Forest | Potawatomi | ppb | 51.2 | 05 PM | 52.3 | 01 PM |
| Racine | Racine-Payne & Dolan | ppb | 30.1 | 12 PM | 41.5 | 10 AM |
| Sheboygan | Sheboygan-Haven | ppb | ||||
| Sheboygan | Sheboygan-Kohler Andrae | ppb | ||||
| Vilas | Trout Lake | ppb | ||||
| Waukesha | Waukesha-Cleveland Ave. | ppb |