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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 7/5/2025 08:00 to 7/5/2025 23:00 for these counties: Kenosha,Manitowoc,Milwaukee,Ozaukee,Racine,Sheboygan .

  • 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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Sunday, 
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 7.4 6.4 6.4 6.4 6.2 5.9 5.7 5.7 5.6 6.1 7.5 9.4 11.4 13.8 16.2 18.6 20.8 21.1 19.6 17.9 16.1 14.9 15.5 16.3
Brown Green Bay UW ppb 31.4 30.8 30.2 29.4 27.8 25.9 23.5 22 20.8 20.4 20.5 20.7 22 23.5 25.4 26.4 27.1 27.3 27.2 26.9 26.6 26.7 26.8 27
Columbia Columbus ppb 16.2 14.4 13.1 12.4 11.7 11 10.4 10.5 11.7 13.1 14.6 16.1 18.2 20.5 23 24.8 25.5 25.7 25.6 25.4 24.3 23.2 22 20.6
Dane Madison East ppb 17.6 16.8 16.2 15.9 15.5 15.2 14.4 13.8 13.2 13 13.5 14.3 15.6 17.5 19.9 22.3 24.1 25.6 26 25.9 25.1 23.3 22.2 20.9
Dodge Horicon Wildlife Area ppb 20.1 18.4 16.7 15.4 14.1 13.2 12.5 12.5 13.5 15 17.1 19.1 21.3 23.3 25.3 26.6 26.7 26.2 25.1 24.1 22.9 21.6 20.2 18.8
Door Newport Park ppb 28.5 28.2 27.7 27.4 26.8 26.3 25.9 25.6 25.5 25.7 26.1 26.5 27 27.7 28.6 29.4 29.9 30.3 30.5 30.9 31.2 31.3 31.2 30.9
Eau Claire Eau Claire DOT Sign Shop ppb 5.9 4.9 4.4 4.2 4.1 3.8 3.4 4.3 6.3 8.3 10.9 13.5 16.8 20.4 24.1 26.7 27.4 27.3 26.5 25.6 24.1 22.1 20 18.1
Fond du Lac Fond Du Lac ppb 20.7 19 17.3 16.3 14.6 13.4 12.7 12.7 13.7 15.9 18.4 20 22.6 24.9 26.5 27.7 28 27 25.7 23.9 22.2 20.8 19.6 18.6
Forest Potawatomi ppb 26.9 25.9 24.8 23.8 22.9 22.1 21.2 20.2 19.4 19.6 20.2 21.1 21.9 22.5 23.3 24.1 24.6 24.7 24.9 25.1 25.1 25.1 25.2 25.4
Jefferson Jefferson-Laatsch ppb 15.8 13.8 12.4 11.2 10.2 9.9 9.5 9.2 9.5 10.5 12.1 13.9 15.9 18.1 20.4 22.5 23.8 24.4 23.5 21.9 20.2 19 17.5 16.2
Kenosha Chiwaukee Prairie ppb 21.9 20.1 18.6 17.2 16 15 14.3 14.1 14.6 15.8 17.3 18.8 20.4 22.2 24 25.4 25.8 25.2 24.4 23.2 22 20.4 18.7 17
Kenosha Kenosha-Water Tower ppb 20.3 18.4 17.2 15.8 14.5 13.3 12.5 12.2 13 14.3 15.8 17.5 19.2 21.2 23.2 24.9 25.3 24.6 23.5 21.5 19.1 16.5 14 11.7
Kewaunee Kewaunee ppb 26.1 25.5 25.2 24.6 23.9 23.3 22.7 22.3 22.1 22.2 22.9 23.5 24.3 25.3 26.3 27 27.2 26.7 26 25.3 24.7 24.5 24.5 24.4
La Crosse La Crosse DOT ppb 9.6 7.9 7 6.6 7 7.3 6.9 7.1 7.2 8.2 10 12.2 14.6 17.6 21.2 24.5 27.2 29.4 30.3 29.5 27.7 25.7 23.8 21.5
Manitowoc Manitowoc ppb 20.1 18.7 17.6 16.9 16.4 16 15.4 15.5 16.1 17.1 18.5 20 21.6 23.5 25.3 26.3 26.5 25.7 25 24 22.7 21.5 20.5 19.7
Marathon Lake Dubay ppb 17.3 16 14.4 12.8 12.1 11.3 10.7 10.3 10.9 11.7 13 14.7 16 17.6 19.3 20.7 21.2 21.5 21.7 21.9 21.8 21.3 20.9 20.3
Milwaukee Bayside ppb 21.1 19.4 18.1 17.3 16.7 16.4 16.3 16.8 17.4 18.8 20.8 22.7 24.3 25.7 27.3 28.4 29.2 28.7 27.6 25.8 24.1 22.2 20.2 18.3
Milwaukee Milwaukee-16th St. Health Center ppb 19.9 18.3 17 16.1 14.7 14 13.4 13.4 13.8 15.3 17.3 19.5 21.8 23.5 25.1 26.5 27.4 26.6 24.8 22.4 20.5 18.8 17.1 15.4
Milwaukee Milwaukee-UWM UPark ppb 21.7 20.1 19.2 18.8 18.7 18.3 18.2 18.5 19.4 20.9 22.8 24.7 26.4 28 29.4 30.5 31 30.4 28.8 26.2 23.2 20.6 17.7 15.8
Outagamie Appleton ppb 18.6 17.4 17.1 16.9 16.6 16.2 16 15.7 15.9 16.8 17.8 18.7 19.5 20.4 21.1 21.8 22.3 21.8 21.2 20.4 19.7 19.1 18.8 18.4
Ozaukee Grafton ppb 22.3 20.8 19.8 19.3 19 18.9 18.7 18.9 19.7 21.3 23 24.6 26.2 27.8 29.5 30.6 31 30.4 28.7 27 24.9 22.7 20.7 19.4
Ozaukee Harrington Beach Park ppb 23.6 22.3 21.4 20.8 20.8 20.9 21.2 21.8 23.1 24.7 26.5 28.2 29.6 31.1 32.6 33.5 33.6 32.7 31.1 29.2 27.2 25.1 23.3 22.1
Racine Racine-Payne & Dolan ppb 20.3 18.9 17.7 16.7 15.6 14.7 14.2 14 14.5 15.6 17.1 18.7 20.7 22.6 24.2 25.9 26.5 25.9 24.9 23.5 21.8 20.1 18.4 16.5
Rock Beloit-Converse ppb 13.2 11.6 10.5 9.9 9.8 9.6 9.4 9.6 10.3 11.6 13.2 15 17.2 19.8 22.7 25 26.4 27.2 27.6 27.7 27.1 25 22.4 20.2
Sauk Devils Lake ppb 15.2 13.9 12.9 11.8 10.9 10.3 9.7 9.3 10 11.1 12.4 14.3 16.4 18.4 20.7 23 24.4 25.4 25.2 24.3 23.2 22 20.5 18.8
Sheboygan Sheboygan-Haven ppb 23.3 22.4 21.9 21.8 21.5 21.3 21.1 21.2 21.5 22.6 23.9 25 26.2 27.5 28.7 29.3 29.3 28.2 26.5 24.9 23.3 21.8 20.6 19.9
Sheboygan Sheboygan-Kohler Andrae ppb 17.3 16.7 16.2 15.8 15.6 15.5 15.5 15.4 15.3 15.5 16.1 16.6 17.3 17.6 18 18.1 18.3 18.3 17.7 17.2 16.3 15.7 15.5 15.4
Vilas Trout Lake ppb 17 15.5 14.4 13.6 13.3 13.4 13.7 14.5 15 15.1 16.4 17.9 19.1 20.5 21.5 22.3 23.3 24 24 23.9 23.5 23.1 22.9 22.3
Walworth Elkhorn ppb 18.8 17.1 15.8 15.1 14.2 13.2 12.5 12.2 12.2 12.7 13.7 15.1 16.6 18.7 20.8 22.7 24.1 24.7 24.5 23.6 22.5 21.7 20.9 19.7
Waukesha Waukesha-Cleveland Ave. ppb 23.1 21.6 20.4 19.3 18.5 17.2 15.9 15 15.4 16.6 18.1 19.6 20.9 22.9 25.1 27.2 28.3 28 26.4 24.3 21.5 18.4 16.3 15