Highest PM2.5
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| County | Site | Units | 24-Hour | Hour of Day | 1-Hour | Hour of Day |
|---|---|---|---|---|---|---|
| Outagamie | Appleton | µg/m³ | 6.7 | 11 AM | 8.9 | 11 AM |
| Ashland | Bad River Tribal School | µg/m³ | 7 | 10 AM | 9.1 | 07 AM |
| Kenosha | Chiwaukee Prairie | µg/m³ | 5.6 | 11 AM | 7.2 | 11 AM |
| Sauk | Devils Lake | µg/m³ | 7.3 | 11 AM | 9.8 | 11 AM |
| Eau Claire | Eau Claire DOT Sign Shop | µg/m³ | 9.1 | 11 AM | 12.7 | 11 AM |
| Brown | Green Bay East High | µg/m³ | 7.9 | 11 AM | 13.2 | 11 AM |
| Ozaukee | Harrington Beach Park | µg/m³ | 6.1 | 10 AM | 7.1 | 11 AM |
| Dodge | Horicon Wildlife Area | µg/m³ | 7.5 | 11 AM | 10.8 | 11 AM |
| La Crosse | La Crosse DOT | µg/m³ | 7.8 | 11 AM | 13.5 | 11 AM |
| Dane | Madison East | µg/m³ | 6.5 | 11 AM | 8.7 | 11 AM |
| Dane | Madison University Ave. Well #6 | µg/m³ | 8.4 | 11 AM | 12.7 | 11 AM |
| Milwaukee | Milwaukee-16th St. Health Center | µg/m³ | 7.7 | 11 AM | 10.7 | 11 AM |
| Milwaukee | Milwaukee-College Ave NR | µg/m³ | 6.3 | 11 AM | 7.9 | 11 AM |
| Milwaukee | Milwaukee-College Ave P&R | µg/m³ | ||||
| Milwaukee | Milwaukee-SER DNR HQ | µg/m³ | 6.7 | 11 AM | 8.1 | 10 AM |
| Taylor | Perkinstown | µg/m³ | 7.5 | 11 AM | 9 | 08 AM |
| Forest | Potawatomi | µg/m³ | 8.7 | 11 AM | 11.9 | 09 AM |
| Grant | Potosi | µg/m³ | 7.1 | 11 AM | 10.7 | 11 AM |
| Vilas | Trout Lake | µg/m³ | 7 | 11 AM | 9 | 08 AM |
| Waukesha | Waukesha-Cleveland Ave. | µg/m³ | 8.3 | 11 AM | 16.7 | 08 AM |