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Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy for Sensitive Groups OZONE levels is in effect from 7/4/2025 08:00 to 7/4/2025 23:00 for these counties: Kenosha,Milwaukee,Ozaukee,Racine .

  • Increases in firework displays over the holiday weekend may lead to short-lived, local spikes in PM2.5 concentrations. Visit https://dnr.wisconsin.gov/topic/AirQuality/Fireworks.html to learn more about air quality and health effects of fireworks.

8-HR Ozone Summary

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Friday, 
County Site Units 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Ashland Bad River Tribal School ppb 23.2 18.9 14.6 10.7 8 6.7 6.4 8.3 10.9
Brown Green Bay UW ppb 32 31 30.5 30.6 30.8 30.9 31.1 31.8 33
Columbia Columbus ppb 40.8 37.6 35.1 32.9 30.4 29 28.2 28.1 28.8
Dane Madison East ppb 47.7 45.8 43.3 41.1 40.2 39.2 38.9 38.9 38.9
Dodge Horicon Wildlife Area ppb 45.9 43.7 41.9 40.1 39.9 39.5 38.5 37 35.8
Door Newport Park ppb 31.6 31.4 31.4 31.9 32.3 32 31.4 31.2 31.4
Eau Claire Eau Claire DOT Sign Shop ppb 42.2 41.3 41.4 40.8 40.5 39.9 37.4 34.8 33.4
Fond du Lac Fond Du Lac ppb 40 38.7 38.2 37.3 35.2 33.9 33.5 33.2 33.5
Forest Potawatomi ppb 38.5 39 39.8 39.6 38.8 38.2 37.6 37 36.7
Jefferson Jefferson-Laatsch ppb 43.5 40.6 38.5 37 36.8 36.2 34.8 34.2 34.5
Kenosha Chiwaukee Prairie ppb 60.9 55.5 51.3 48.4 44.6 41.8 39 36.3 35.9
Kenosha Kenosha-Water Tower ppb 58.6 55.8 53.9 52.6 51 48.8 46.8 45.4 43.8
Kewaunee Kewaunee ppb 37.3 36.9 36.6 36.2 35.8 35.2 34.7 35.4 36.4
La Crosse La Crosse DOT ppb 48.9 47.9 47 46.6 45.5 44.7 43.5 42.3 41.4
Manitowoc Manitowoc ppb 21.3 17.6 16.1 15.3 16.2 18.3 21.7 25.7 30.1
Marathon Lake Dubay ppb 47.8 46 44.3 41.9 38.1 34.6 31.6 29.7 29.3
Milwaukee Bayside ppb 43.1 40.2 38.4 37.3 35.7 35.1 34.5 34.7 35.2
Milwaukee Milwaukee-16th St. Health Center ppb 40.8 39.1 37.9 37.7 37.8 37.5 36.4 35.3 34.8
Milwaukee Milwaukee-UWM UPark ppb 44.7 42.6 41.1 39.9 38.9 38 37 36.1 35.7
Outagamie Appleton ppb 37.7 35.7 34.7 34.1 33.1 33 33.5 34.1 35.1
Ozaukee Grafton ppb 40.5 37.6 35.1 33.6 34 35.1 35.5 35.4 36.1
Ozaukee Harrington Beach Park ppb 38.4 36.2 34.3 33.5 33.1 33.8 34.4 35.5 37.5
Racine Racine-Payne & Dolan ppb 50.7 48.6 46.4 45.8 46.1 46.1 45.6 44.7 45.2
Rock Beloit-Converse ppb 46.4 44.2 41.9 40 38.7 38.4 38.2 38.9 39.5
Sauk Devils Lake ppb 43.8 42.9 41.9 41.9 42 41.3 40.3 39.4 38.3
Sheboygan Sheboygan-Haven ppb 35 34 32.7 32 32.8 34 34.9 36.1 37
Sheboygan Sheboygan-Kohler Andrae ppb 36.7 34.7 31.8 30.9 32.3 34.9 36.7 38.3 40
Vilas Trout Lake ppb 33.5 32.9 33.5 34.9 36.7 38.1 38.3 38 37.3
Walworth Elkhorn ppb 44.9 42.9 41.6 40.3 39.3 39.5 40.2 40.7 40.8
Waukesha Waukesha-Cleveland Ave. ppb 44.7 41.6 39 37.2 36.7 36 35.3 34.4 33.9