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 | 42.3 | 01 AM | 42.8 | 11 AM |
| Kenosha | Chiwaukee Prairie | ppb | 38.6 | 11 AM | 41.8 | 11 AM |
| Dodge | Horicon Wildlife Area | ppb | 41.5 | 11 AM | 43.4 | 11 AM |
| Kenosha | Kenosha-Water Tower | ppb | 40.3 | 11 AM | 43.6 | 11 AM |
| Forest | Potawatomi | ppb | 41.2 | 06 AM | 42.5 | 11 AM |