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 | 21.3 | 06 PM | 24.5 | 05 PM |
| Kenosha | Chiwaukee Prairie | ppb | 39.6 | 04 AM | 42 | 12 AM |
| Eau Claire | Eau Claire DOT Sign Shop | ppb | 26.4 | 06 PM | 28.6 | 04 PM |
| Dodge | Horicon Wildlife Area | ppb | 32.9 | 06 PM | 35.6 | 02 PM |
| Kenosha | Kenosha-Water Tower | ppb | 37.5 | 12 AM | 40 | 12 AM |
| Forest | Potawatomi | ppb | 28.6 | 07 PM | 30.8 | 04 PM |