| County | Site | Units | 24-Hour | Hour Of Day | 1 Hour | Hour Of Day |
|---|---|---|---|---|---|---|
| Outagamie | Appleton | µg/m³ | 9.1 | 04 AM | 10.6 | 01 AM |
| Ashland | Bad River | µg/m³ | 14.9 | 01 AM | 12.2 | 01 AM |
| Kenosha | Chiwaukee Prairie | µg/m³ | 8.9 | 12 AM | 11.9 | 11 PM |
| Sauk | Devil's Lake | µg/m³ | 6.7 | 12 AM | 7.5 | 07 PM |
| Eau Claire | Eau Claire | µg/m³ | 8.8 | 01 AM | 9.7 | 12 AM |
| Brown | Green Bay - East High | µg/m³ | 9.9 | 02 AM | 9.2 | 05 PM |
| Ozaukee | Harrington Beach | µg/m³ | 8.1 | 12 AM | 10.2 | 05 PM |
| Dodge | Horicon | µg/m³ | 8.5 | 12 AM | 10.5 | 09 PM |
| Marathon | Lake DuBay | µg/m³ | ||||
| Dane | Madison - East | µg/m³ | 7.3 | 12 AM | 11.8 | 12 AM |
| Dane | Madison - Univ. Ave | µg/m³ | 9.6 | 12 AM | 11.6 | 11 PM |
| Milwaukee | Milwaukee-16th St. | µg/m³ | 10.4 | 12 AM | 14.7 | 10 PM |
| Milwaukee | Milwaukee - College Ave NR | µg/m³ | 9.3 | 12 AM | 12.3 | 10 PM |
| Forest | Potawatomi | µg/m³ | 16.8 | 01 AM | 10.3 | 01 AM |
| Grant | Potosi | µg/m³ | 8.8 | 11 PM | 10.4 | 08 PM |
| Waukesha | Waukesha | µg/m³ | 8.9 | 12 AM | 12 | 12 AM |