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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 18.2 16.3 14.9 14.7 15.7 16.8 18.1 19.8 22.1 24.9 27.9 31.2 34.4 37.5 40.2 42.3 43.3 43.8 44.3 44.5 43.7 42.2 41.2 40
Brown Green Bay UW ppb 24.4 21.1 17.7 15.1 13.7 12.6 13.4 15.2 17.2 19.6 23.2 27.8 32.8 38.2 41.9 43.5 44.6 45.1 44.4 42.5 39.7 36.7 33.9 31.8
Columbia Columbus ppb 34.4 32.8 31.1 30 29 28 27.7 27.4 27.4 28.4 30.2 32.8 36.1 40 44.1 48.6 52.3 53.9 53.5 52.9 52.1 50.2 47.5 44.7
Dane Madison East ppb 36 34.9 33.8 32.8 32.5 31.7 32.2 32.1 31.8 32.8 34.4 36.5 39.7 43.5 47 50.9 55 56.8 57.2 57.1 56.6 55.3 53.3 50.5
Dodge Horicon Wildlife Area ppb 30.5 29.1 27.8 27.3 27.1 26.4 25.9 25.5 25.3 26.4 28.4 31.1 34.1 37.7 41.7 45.9 49.2 50.7 50.4 49 47.3 46.1 43.8 41
Door Newport Park ppb 26.6 24.7 22.3 20.2 19.1 17.5 17.8 19.7 21.6 24.2 27 29.6 31.2 33.7 35.2 36 36.4 36.6 36.6 36.7 36.8 36.3 35.9 35.3
Eau Claire Eau Claire DOT Sign Shop ppb 19.2 14.2 9.4 5.2 2.6 2.2 3 6.5 11.5 17.2 23.3 29.4 35.3 40.8 45.4 47.4 47.6 46.9 45.4 43.6 41.1 38.3 34.4 29.8
Fond du Lac Fond Du Lac ppb 33.5 32.3 31.1 29.9 27.9 25.9 24.4 23.1 22.9 24.2 26.1 28.6 32.2 36.5 40.5 43.6 45.5 45.4 44.7 43.5 41.5 39.2 36.6 33.8
Forest Potawatomi ppb 23.1 23 22.3 21.4 21.5 21.8 22.1 22.5 23.4 24.8 27.1 29.3 31.1 32.8 34.2 35 35.2 34.6 33.7 32.6 31.3 30.7 30.7 31.1
Jefferson Jefferson-Laatsch ppb 31.1 27.3 24.2 21.8 19.7 18 18 18.6 19.9 22.7 26.2 29.8 34.6 39.5 43 46.6 50.2 52.3 52.4 51.7 50.1 48.3 46 43.1
Kenosha Chiwaukee Prairie ppb 18.7 16 14 12.3 12.2 12.6 14.3 17 20.1 23.2 26.5 30.3 34.3 37.9 40.1 41.5 42.4 43.1 43.6 41.9 40.3 38.3 35.9 33.3
Kenosha Kenosha-Water Tower ppb 21.3 18.2 15.4 13.3 10.5 8.7 9.4 11.4 14.7 18.1 21.8 25.8 31.2 36.1 39.6 42.1 43.5 44.3 44.8 43.5 41.5 39.5 36.3 33
Kewaunee Kewaunee ppb 33.2 33.4 33.2 31.9 29.9 27.4 26.2 25.5 25.2 25.3 26.4 29.1 32.6 36.1 38.2 39.7 40.6 41.1 41.4 41.4 41.4 41.1 40.3 39.4
La Crosse La Crosse DOT ppb 33.5 29.9 26.4 22.7 19.9 18.3 17.3 16.6 16.4 18.8 22.3 26.7 31.5 35.4 39.1 42.1 44.4 44.6 43.8 42.8 41.6 40.8 39.8 38.5
Manitowoc Manitowoc ppb 10.5 7.4 4.6 2.9 2.1 1.8 2.7 5.8 10 14.3 19 24.1 29.4 34.6 38.7 40.7 41.5 42.2 41.9 40.3 36.7 32.7 29.4 25.7
Marathon Lake Dubay ppb 35.4 33.5 30.9 27.9 23.8 20.2 17.6 16.5 17.3 19 21.2 24 28.2 32.4 35.9 37.9 38.3 37.5 37 36.5 35.8 35 34.3 33.7
Milwaukee Bayside ppb 13.4 11.6 10.1 9.6 10.2 12.1 14.1 16.3 18.7 20.5 22.4 23.3 24.5 26.5 29.4 31.9 33.6 34.7 35.3 36.2 36.5 35 33.5 31.3
Milwaukee Milwaukee-16th St. Health Center ppb 17.1 15.8 15.6 15.6 15.9 16.1 17.1 18.8 20.4 22 23.1 24.1 26.4 29.1 32 34.6 36.8 38 38.5 38 37.1 36.3 34.9 33.4
Milwaukee Milwaukee-UWM UPark ppb 17.7 15.2 14 13.7 14 14.6 16.2 18.5 21.3 23.9 25.5 26.6 28.1 30.3 32.4 34.6 36.4 38 38.9 39.4 39.1 38.1 37.3 35.7
Outagamie Appleton ppb 30.3 27.6 24.5 22.1 19.6 17.4 16.3 16.5 17.9 20.8 24.8 28.7 33.7 38.8 43.1 46.2 48.9 50.5 50.6 48.9 46.5 43.7 40.6 37.1
Ozaukee Grafton ppb 15.8 14.6 13.9 13.5 15.1 16.6 17.9 18.8 20.1 21.5 23 25 27.2 29.3 32.5 35.6 37.3 38.5 39.1 39.2 38.5 37.7 36.3 34.1
Ozaukee Harrington Beach Park ppb 16.9 15.7 15.3 15 14.7 15.2 15.4 16.8 18.3 20.1 21.3 23.1 25.3 27.6 30 32.1 33.5 34.5 35.4 35.2 35 34.1 32.8 30.3
Racine Racine-Payne & Dolan ppb 20.4 18.2 16.2 14.4 13.6 13.4 13.5 14.9 17.5 20.1 23.4 27.1 30.5 33.7 36.6 38.8 40.4 41.7 42.3 42.4 41.6 40.8 40.1 37.7
Rock Beloit-Converse ppb 34.4 31.6 29.7 28.5 27.1 25.9 25.9 26.3 27.6 30.4 33.3 36.7 41.7 46.2 49.6 52.9 55 54.7 53.1 50.7 48.2 45.7 42.6 39.1
Sauk Devils Lake ppb 37.7 35.4 33.2 30.5 28.2 26.7 25.9 25.9 26.1 27.3 29 31.6 35 38.3 41.4 44.2 46.8 48.2 48.5 48.4 47.1 46 44.9 43.4
Sheboygan Sheboygan-Haven ppb 15.3 12.4 9.8 8.1 6.7 6.6 7.6 9.8 12.2 15.8 19.5 23.5 27.2 30.3 32.9 34.6 36.1 37.4 37.8 37.3 36.8 35.4 33.6 32.1
Sheboygan Sheboygan-Kohler Andrae ppb 15.4 13.3 10.8 8.8 7.4 6.8 6.9 8.7 11.1 13.9 17.5 21.5 25.9 29.7 33.3 35.5 37.3 38.7 39.4 39.6 40 39.6 37.6 34.6
Vilas Trout Lake ppb 27.6 24.7 22.1 18.9 16.1 14.2 14.5 15.1 17.3 20.2 23.1 27.1 32 36.2 39.1 41.8 43.5 44.6 45.2 45.6 45.8 45.5 44.6 43.7
Walworth Elkhorn ppb 31 26 22.5 20.5 19.6 18.9 19.7 21 22.9 26.2 29.6 33 36.7 41 45.2 49.5 53.1 55.8 56.6 56.1 54.4 51.8 48.5 44.4
Waukesha Waukesha-Cleveland Ave. ppb 26.9 23.8 20.9 20 20 20.2 20.7 21.5 23 26.2 30.5 33.5 36.4 39.7 43.5 47.6 49.4 49.2 47.7 45.3 42.7 41.6 40.4 38.5