Highest PM2.5
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| County | Site | Units | 24-Hour | Hour of Day | 1-Hour | Hour of Day |
|---|---|---|---|---|---|---|
| Outagamie | Appleton | µg/m³ | 23.6 | 04 AM | ||
| Brown | Green Bay East High | µg/m³ | 24.4 | 04 AM | ||
| Ozaukee | Harrington Beach Park | µg/m³ | 20.9 | 01 PM | ||
| La Crosse | La Crosse DOT | µg/m³ | 21.4 | 11 AM | ||
| Dane | Madison East | µg/m³ | 18.1 | 10 AM | ||
| Dane | Madison University Ave. Well #6 | µg/m³ | 19.2 | 12 PM | ||
| Milwaukee | Milwaukee-16th St. Health Center | µg/m³ | 22.2 | 04 PM | ||
| Taylor | Perkinstown | µg/m³ | 20 | 11 AM | ||
| Grant | Potosi | µg/m³ | 19.7 | 05 AM | ||
| Vilas | Trout Lake | µg/m³ | 14.7 | 08 AM |