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| County | Site | Units | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ashland | Bad River Tribal School | ppb | 26.4 | 25.7 | 25.2 | 25.2 | 25.5 | 25.6 | 25.1 | 24.7 | 24.5 | 24.4 | 24.5 | 24.8 | 25.3 | 26 | 27.2 | 28.4 | 29.5 | 30.4 | 31.2 | 31.6 | 31.3 | 31 | 30.5 | 30 |
| Brown | Green Bay UW | ppb | 24.8 | 23.6 | 22.4 | 21.5 | 20.1 | 18.9 | 17.8 | 17.8 | 17.9 | 18.1 | 18.7 | 19.8 | 21.7 | 23.1 | 25.8 | 27.6 | 29.2 | 30.3 | 31.2 | 31.6 | 31.6 | 31.3 | 31 | 30.4 |
| Columbia | Columbus | ppb | 23.8 | 22.2 | 20.7 | 19.5 | 18.1 | 16.8 | 16.1 | 16 | 16.9 | 18.8 | 21.5 | 24.5 | 27.4 | 30.1 | 31.8 | 32.8 | 33.6 | 33.9 | 33.5 | 32.8 | 32 | 31 | 30.6 | 30.7 |
| Dane | Madison East | ppb | 25.7 | 24.1 | 22.8 | 21.5 | 20.3 | 19.4 | 18.5 | 18 | 18.6 | 20.2 | 22.1 | 24.1 | 26.4 | 28.4 | 30.3 | 31.2 | 31.4 | 31.5 | 31.7 | 31.8 | 31.3 | 30.9 | 30.5 | 30.6 |
| Dodge | Horicon Wildlife Area | ppb | 24.5 | 22.7 | 21 | 19.6 | 18.2 | 16.7 | 15.8 | 15.7 | 16.5 | 17.7 | 19.9 | 22.4 | 25.3 | 27.7 | 29.3 | 30.5 | 31.5 | 32.2 | 32.2 | 32.3 | 32.1 | 31.6 | 31.4 | 30.8 |
| Door | Newport Park | ppb | 32.5 | 31 | 29.8 | 27.9 | 26 | 24.3 | 23.2 | 23.2 | 24 | 25 | 25.8 | 27.2 | 28.5 | 29.7 | 30.8 | 31.7 | 32.2 | 32.6 | 31.9 | 30.7 | 29.4 | 28.5 | 28.1 | 27.8 |
| Eau Claire | Eau Claire DOT Sign Shop | ppb | 19.8 | 18.9 | 17.9 | 17 | 16.6 | 16.2 | 15.8 | 16 | 16.3 | 16.7 | 17.9 | 19.6 | 21 | 22.5 | 24 | 24.8 | 25.7 | 27.1 | 27.7 | 27.8 | 28.4 | 28.7 | 29.1 | 29.7 |
| Fond du Lac | Fond Du Lac | ppb | 26.4 | 24.7 | 23.1 | 21.7 | 20.3 | 18.9 | 17.8 | 17.3 | 17.9 | 19.1 | 20.6 | 22.6 | 24.8 | 26.6 | 28.5 | 30.4 | 31.5 | 32.1 | 32.6 | 32.8 | 32.8 | 32.8 | 32.4 | 31.2 |
| Forest | Potawatomi | ppb | 28 | 26.7 | 25.3 | 24.4 | 23.5 | 23.1 | 23.2 | 23.2 | 23.5 | 24.3 | 25.1 | 25.7 | 26.3 | 27 | 27.5 | 28.1 | 28.3 | 28.3 | 28.5 | 29 | 29.2 | 29 | 28.7 | 28.2 |
| Jefferson | Jefferson-Laatsch | ppb | 26.4 | 24.8 | 23.4 | 22 | 20.2 | 18.6 | 17.5 | 17.3 | 17.5 | 19.1 | 21 | 23.7 | 26.8 | 29.7 | 32.1 | 33.7 | 34.2 | 33.6 | 33.4 | 33 | 32.6 | 31.9 | 31.2 | 30.7 |
| Kenosha | Chiwaukee Prairie | ppb | 31.4 | 29.4 | 27.6 | 25.9 | 24.4 | 23 | 21.9 | 21.1 | 21.6 | 22.8 | 24.6 | 27 | 29.9 | 33.2 | 36.1 | 38.4 | 39.4 | 39.8 | 39.9 | 39.6 | 38.8 | 37.8 | 37 | 36.3 |
| Kenosha | Kenosha-Water Tower | ppb | 27.2 | 25 | 23 | 21.4 | 19.8 | 18.4 | 17.3 | 16.7 | 17.3 | 18.8 | 20.9 | 23.5 | 26.8 | 30.1 | 33 | 35.2 | 35.8 | 36 | 36.2 | 35.6 | 34.6 | 33.8 | 33.2 | 32.4 |
| Kewaunee | Kewaunee | ppb | 27.3 | 25.1 | 23.5 | 22.2 | 21.1 | 19.9 | 19.3 | 18.8 | 19.5 | 20.4 | 21.2 | 22.4 | 24.2 | 26.5 | 28.7 | 30.9 | 31.5 | 32.3 | 33.1 | 33.6 | 33.1 | 32.2 | 31.2 | 30.3 |
| La Crosse | La Crosse DOT | ppb | 23.3 | 22.4 | 21.4 | 20.4 | 19.5 | 18.8 | 18.5 | 18.1 | 18.4 | 19 | 20.1 | 21.5 | 23.5 | 25.9 | 28.3 | 29.7 | 30.5 | 31.1 | 31.2 | 31.5 | 31.3 | 30.5 | 29.8 | 29.8 |
| Manitowoc | Manitowoc | ppb | 25.7 | 24 | 22.7 | 21.4 | 20.2 | 19.2 | 18.5 | 18 | 18.4 | 19.1 | 20.1 | 21.7 | 23.6 | 25.9 | 28.3 | 30.3 | 31.5 | 32.3 | 33 | 33.6 | 33.7 | 33 | 31.8 | 30.6 |
| Marathon | Lake Dubay | ppb | 23.7 | 22.4 | 21.3 | 20 | 18.7 | 17.5 | 16.9 | 16.6 | 16.6 | 17 | 18.5 | 20.2 | 22.1 | 24.6 | 26.8 | 28.6 | 30.3 | 31.5 | 31.4 | 30.9 | 30.8 | 30.1 | 29.2 | 28.6 |
| Milwaukee | Bayside | ppb | 29.6 | 27.4 | 25.6 | 24 | 22.4 | 21 | 19.7 | 19.1 | 19.6 | 20.7 | 22.7 | 25.4 | 28.5 | 31.8 | 34.4 | 36.6 | 37 | 37 | 36.8 | 36 | 35.3 | 35 | 34.3 | 33 |
| Milwaukee | Milwaukee-16th St. Health Center | ppb | 27 | 25.2 | 23.7 | 22.5 | 21.3 | 19.7 | 18.4 | 17.7 | 17.8 | 18.9 | 20.6 | 23.1 | 26.1 | 29.3 | 32.2 | 34.1 | 34.8 | 34.1 | 33.5 | 32.5 | 31.3 | 30.7 | 29.9 | 29 |
| Outagamie | Appleton | ppb | 25.8 | 24.4 | 22.9 | 21.7 | 20.5 | 18.8 | 17.3 | 16.5 | 16.6 | 17 | 17.8 | 19.3 | 21.6 | 24.8 | 26.8 | 28 | 29.3 | 30.4 | 31.5 | 31.8 | 31.1 | 29.8 | 29.4 | 29.2 |
| Ozaukee | Grafton | ppb | 26.5 | 25 | 23.5 | 22.1 | 20.6 | 19.2 | 18 | 17.3 | 17.6 | 18.6 | 20.2 | 22.4 | 25.2 | 27.8 | 29.4 | 30.3 | 30.8 | 30.9 | 31.1 | 30.6 | 30.3 | 30.2 | 30.4 | 30.4 |
| Ozaukee | Harrington Beach Park | ppb | 27.9 | 26.1 | 24.4 | 22.9 | 21.4 | 20.2 | 19.3 | 18.4 | 18.6 | 19.7 | 21.5 | 23.6 | 26.3 | 28.8 | 30.4 | 32 | 33.1 | 33.7 | 34 | 33.8 | 33.7 | 33.9 | 33.9 | 33.3 |
| Racine | Racine-Payne & Dolan | ppb | 30.9 | 29 | 27.3 | 25.8 | 24.5 | 23.2 | 21.7 | 20.9 | 20.9 | 21.7 | 23.2 | 25.3 | 28.1 | 31.3 | 34.7 | 37.2 | 38.8 | 39.5 | 39.7 | 39.4 | 38.4 | 37.1 | 36.3 | 35.2 |
| Rock | Beloit-Converse | ppb | 26.1 | 24.4 | 22.9 | 21.3 | 19.7 | 18.1 | 17.1 | 16.8 | 17.2 | 18.7 | 20.7 | 23.1 | 25.8 | 28.6 | 30.8 | 32.6 | 33.3 | 32.8 | 32.1 | 31.8 | 31.7 | 31.2 | 30.8 | 30.5 |
| Sauk | Devils Lake | ppb | 24.6 | 23.5 | 22.3 | 21 | 20 | 19.1 | 18.5 | 18.8 | 19.8 | 20 | 20.4 | 30.4 | 30.5 | 30.4 | 29.5 | 29 | 29.1 | 29.3 | ||||||
| Sheboygan | Sheboygan-Haven | ppb | 27.2 | 25.6 | 24.2 | 22.9 | 21.7 | 20.4 | 19.3 | 18.5 | 18.7 | 19.3 | 20.5 | 22.2 | 24.1 | 26.2 | 28.2 | 30.3 | 31.9 | 32.9 | 33.3 | 33.6 | 33.8 | 33.8 | 33.1 | 32.1 |
| Sheboygan | Sheboygan-Kohler Andrae | ppb | 28.1 | 26.6 | 24.9 | 23.5 | 22.1 | 20.7 | 19.6 | 18.8 | 18.8 | 19.7 | 21.2 | 23.1 | 25.3 | 27.3 | 28.9 | 30.5 | 31.7 | 32.2 | 32.2 | 31.9 | 31.6 | 31.6 | 31.3 | 30.6 |
| Vilas | Trout Lake | ppb | 25.8 | 25.5 | 25.4 | 25.3 | 25.1 | 24.9 | 25 | 25.8 | 26 | 25.7 | 25.8 | 25.7 | 26 | 26.7 | 27.3 | 27.4 | 27.6 | 27.8 | 28 | 28.9 | 29.3 | 29.3 | 29.2 | 28.7 |
| Waukesha | Waukesha-Cleveland Ave. | ppb | 27.1 | 25.6 | 24.1 | 22.8 | 21.6 | 20.3 | 19 | 18.2 | 18.4 | 19.4 | 21.4 | 23.9 | 26.7 | 29.7 | 32.2 | 33.9 | 34.6 | 34.7 | 34 | 33.1 | 32.3 | 31.7 | 30.9 | 30 |