Highest Ozone
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| County | Site | Units | 8-Hour | Hour of Day | 1-Hour | Hour of Day |
|---|---|---|---|---|---|---|
| Outagamie | Appleton | ppb | 82.3 | 06 PM | 85.4 | 03 PM |
| Ashland | Bad River Tribal School | ppb | 58.1 | 04 PM | 60.9 | 04 PM |
| Milwaukee | Bayside | ppb | 74.4 | 06 PM | 78.8 | 03 PM |
| Rock | Beloit-Converse | ppb | 86.3 | 06 PM | 99.7 | 05 PM |
| Kenosha | Chiwaukee Prairie | ppb | 78.3 | 07 PM | 84.5 | 05 PM |
| Columbia | Columbus | ppb | 83.1 | 05 PM | 85.6 | 12 PM |
| Sauk | Devils Lake | ppb | 80 | 05 PM | 82.9 | 03 PM |
| Eau Claire | Eau Claire DOT Sign Shop | ppb | 70.3 | 07 PM | 74.7 | 05 PM |
| Walworth | Elkhorn | ppb | 79.6 | 05 PM | 84.2 | 02 PM |
| Fond du Lac | Fond Du Lac | ppb | 77.4 | 05 PM | 81.1 | 02 PM |
| Ozaukee | Grafton | ppb | 73.5 | 06 PM | 76.3 | 03 PM |
| Brown | Green Bay UW | ppb | 81.8 | 06 PM | 83.9 | 02 PM |
| Ozaukee | Harrington Beach Park | ppb | 73.2 | 07 PM | 77.2 | 04 PM |
| Dodge | Horicon Wildlife Area | ppb | 83 | 05 PM | 85.7 | 11 AM |
| Jefferson | Jefferson-Laatsch | ppb | 80 | 05 PM | 84.2 | 12 PM |
| Kenosha | Kenosha-Water Tower | ppb | 73.3 | 07 PM | 77.6 | 01 PM |
| Kewaunee | Kewaunee | ppb | 76 | 10 PM | 81.7 | 06 PM |
| La Crosse | La Crosse DOT | ppb | 77.7 | 08 PM | 81.4 | 05 PM |
| Marathon | Lake Dubay | ppb | 79.3 | 05 PM | 81.3 | 03 PM |
| Dane | Madison East | ppb | 82.3 | 05 PM | 83.9 | 12 PM |
| Manitowoc | Manitowoc | ppb | 67.2 | 04 PM | 69.6 | 03 PM |
| Milwaukee | Milwaukee-16th St. Health Center | ppb | 62.1 | 06 PM | 64 | 05 PM |
| Milwaukee | Milwaukee-UWM UPark | ppb | 71.1 | 05 PM | 72.8 | 02 PM |
| Door | Newport Park | ppb | 78.4 | 11 PM | 84.5 | 05 PM |
| Forest | Potawatomi | ppb | 77.3 | 07 PM | 78.9 | 05 PM |
| Racine | Racine-Payne & Dolan | ppb | 74.8 | 06 PM | 78.8 | 02 PM |
| Sheboygan | Sheboygan-Haven | ppb | 75.3 | 05 PM | 80.9 | 03 PM |
| Sheboygan | Sheboygan-Kohler Andrae | ppb | 72.3 | 06 PM | 74.8 | 06 PM |
| Vilas | Trout Lake | ppb | 77 | 06 PM | 77.5 | 04 PM |
| Waukesha | Waukesha-Cleveland Ave. | ppb | 78.8 | 04 PM | 84.1 | 01 PM |