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| County | Site | Units | 24-Hour | Hour Of Day | 1 Hour | Hour Of Day |
|---|---|---|---|---|---|---|
| Outagamie | Appleton | µg/m³ | 15.1 | 12 AM | 18.4 | 11 AM |
| Ashland | Bad River | µg/m³ | 11.2 | 01 AM | 12.1 | 01 AM |
| Kenosha | Chiwaukee Prairie | µg/m³ | 9.8 | 09 AM | 10.7 | 03 PM |
| Sauk | Devil's Lake | µg/m³ | 13.4 | 10 AM | 19.5 | 05 AM |
| Eau Claire | Eau Claire | µg/m³ | 12.6 | 07 PM | 22.4 | 01 PM |
| Brown | Green Bay - East High | µg/m³ | 16.4 | 10 PM | 22.2 | 08 PM |
| Ozaukee | Harrington Beach | µg/m³ | 13.5 | 12 PM | 19.1 | 04 AM |
| Dodge | Horicon | µg/m³ | 14.5 | 10 AM | 19.6 | 05 AM |
| Marathon | Lake DuBay | µg/m³ | ||||
| Dane | Madison - East | µg/m³ | 14.9 | 09 AM | 17.6 | 05 AM |
| Dane | Madison - Univ. Ave | µg/m³ | 17.6 | 10 AM | 22.4 | 09 AM |
| Milwaukee | Milwaukee-16th St. | µg/m³ | 18.2 | 02 PM | 25.6 | 08 AM |
| Milwaukee | Milwaukee - College Ave NR | µg/m³ | 14.8 | 01 PM | 14.4 | 08 AM |
| Forest | Potawatomi | µg/m³ | 11.6 | 01 AM | 13.8 | 11 PM |
| Grant | Potosi | µg/m³ | 16.5 | 06 AM | 19.9 | 06 AM |
| Waukesha | Waukesha | µg/m³ | 18.8 | 02 PM | 22.3 | 09 AM |