Highest Ozone
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| County | Site | Units | 8-Hour | Hour of Day | 1-Hour | Hour of Day |
|---|---|---|---|---|---|---|
| Ashland | Bad River Tribal School | ppb | 25.1 | 12 AM | 22.3 | 05 PM |
| Kenosha | Chiwaukee Prairie | ppb | 47.2 | 03 PM | 49.7 | 10 AM |
| Eau Claire | Eau Claire DOT Sign Shop | ppb | 34.2 | 12 AM | 33.7 | 02 PM |
| Dodge | Horicon Wildlife Area | ppb | 40.3 | 05 PM | 44.5 | 02 PM |
| Kenosha | Kenosha-Water Tower | ppb | 45.1 | 03 PM | 48.3 | 10 AM |
| Forest | Potawatomi | ppb | 23.9 | 12 AM | 21.3 | 02 AM |