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| County | Site | Units | 24-hour | Hour of Day | 1-Hour | Hour of Day |
|---|---|---|---|---|---|---|
| Kenosha | Chiwaukee Prairie | µg/m³ | 4.7 | 12 AM | 8.7 | 01 PM |
| Sauk | Devils Lake | µg/m³ | 8.2 | 04 PM | 9.6 | 07 AM |
| Eau Claire | Eau Claire DOT Sign Shop | µg/m³ | 7.3 | 04 PM | 10.5 | 03 PM |
| Brown | Green Bay East High | µg/m³ | 9.1 | 12 AM | 9.1 | 03 PM |
| Ozaukee | Harrington Beach Park | µg/m³ | 5.0 | 12 AM | 5.9 | 04 PM |
| Dodge | Horicon Wildlife Area | µg/m³ | 7.4 | 10 AM | 10.4 | 05 AM |
| La Crosse | La Crosse DOT | µg/m³ | 6.1 | 04 PM | 8.1 | 06 AM |
| Dane | Madison East | µg/m³ | 7.1 | 04 PM | 9.3 | 06 AM |
| Milwaukee | Milwaukee-16th St. Health Center | µg/m³ | 7.5 | 12 AM | 12.0 | 10 AM |
| Milwaukee | Milwaukee-College Ave NR | µg/m³ | 6.7 | 12 AM | 8.1 | 02 PM |
| Milwaukee | Milwaukee-College Ave P&R | µg/m³ | 6.3 | 12 AM | 10.0 | 03 PM |
| Milwaukee | Milwaukee-SER DNR HQ | µg/m³ | 7.3 | 12 AM | 10.1 | 04 AM |
| Taylor | Perkinstown | µg/m³ | 5.9 | 04 PM | 7.2 | 07 AM |
| Grant | Potosi | µg/m³ | 8.0 | 04 PM | 11.5 | 09 AM |
| Vilas | Trout Lake | µg/m³ | 6.2 | 10 AM | 7.1 | 05 AM |