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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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Monday, 
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 31.4 34.1 38.5 43.8 47.3 47.3 46.6 45.6 44.7 43.9 43.7 44.3 45.2 46.2 47.6 49.4 51.1 52.1 51.3 49.4 49 48.8 48.7 48.4
Brown Green Bay UW ppb 48.3 46.6 45.2 44.1 43.4 41.9 41.6 42.1 42.6 44.2 46.6 49.6 51.7 55.5 58.8 61.7 64.1 66.1 66.8 66.9 66.9 66.7 66.5 65.9
Columbia Columbus ppb 51.6 49 46.9 44.9 44 41.2 38.5 36.1 34.4 34.6 36.4 40 43.1 47.2 51.6 55.7 58.6 60 60.2 58.9 57.2 55 52.8 50.4
Dane Madison East ppb 44.8 42.6 40 36.9 36.1 33.5 30.8 29.4 28.5 28.5 31 36 39.1 43.9 48.6 52.5 56.1 57.9 57.4 55.7 53.6 51.5 49 45.7
Dodge Horicon Wildlife Area ppb 52.1 51.6 50.9 50 49.9 48.2 45.8 42.8 40.6 39.6 40.2 42.2 44.8 48.4 52.6 57.1 60.8 63.2 63.6 62.9 62 61 60.2 58.8
Door Newport Park ppb 56.3 55.3 54.1 52.8 52.1 49.9 48.1 46.2 44.7 44.2 45 46.7 48.2 50.3 52 54.3 56.9 59.5 61.8 63.5 64.7 65.8 66.6 66.1
Eau Claire Eau Claire DOT Sign Shop ppb 47.8 47.3 47.1 46.1 46 41.9 38.1 35.6 35.3 35.7 36.8 39.4 41.6 46.6 51.2 55.1 56.6 57.5 58.1 58.3 57.8 57.3 56.7 55.9
Fond du Lac Fond Du Lac ppb 49.3 48.4 48.1 47.9 47.9 46.1 43.6 41.1 40.2 40 40.9 42.5 44.8 48.2 52.3 56.5 59.1 60.1 59.6 58.7 57.9 57.2 56.5 55.5
Forest Potawatomi ppb 46.7 46.8 47.1 47.2 46.8 46.3 45.8 45.5 45.4 45.7 46.5 47.9 49.7 52 54.1 55.9 57.4 58.3 58.6 58.4 57.7 56.7 55.7 54.8
Jefferson Jefferson-Laatsch ppb 43.3 38.3 34 29.6 26.2 21 19.9 18.7 20 23.5 28 34.1 37.5 43.9 50.3 55.8 58.9 59.7 58.1 55.5 53.1 49.3 45.9 41.5
Kenosha Chiwaukee Prairie ppb 39.9 35 31.3 29.8 28.6 27 25.2 23.3 24.4 26.7 28.6 28.9 30.8 35.1 40.3 46 49.9 53.2 57 60.4 62.6 62.7 62.9 62.1
Kenosha Kenosha-Water Tower ppb 51.6 49.7 49.2 47.4 46.5 41.4 36.2 32.5 30.9 31 31.8 35 38.4 44.6 52.4 60 65.3 67.9 68.7 68.8 68.7 67.8 66.1 63.3
Kewaunee Kewaunee ppb 53.2 51.3 49.7 48.4 47.8 46.9 45.5 44.4 43.6 43.9 45 46.7 48.5 50.9 54.3 57.8 61.5 64.6 66.9 67.8 67.7 67 65.8 63.9
La Crosse La Crosse DOT ppb 53 51.4 48.7 45.9 44.6 42 39.1 36.5 34.3 33.6 36.1 39.3 41.8 45.3 49 53.2 57.1 60.1 61.2 61.4 61.4 60.9 60.4 59.4
Manitowoc Manitowoc ppb 49.2 47.2 45.4 44.1 43 40.7 38.1 37.6 37 37.1 38.1 40 42.1 45.8 50.8 55.3 59.4 62.7 65.2 66.5 66.5 65.1 62.9 59.7
Marathon Lake Dubay ppb 42.1 40.4 39.1 38 37.5 35.6 34 32.5 32.1 32.9 35 38.1 40.4 44.5 48.7 52.6 55.4 56.9 57 56.5 55.5 53.9 52 50
Milwaukee Bayside ppb 31.1 24.3 19.1 15.3 12.2 8.6 5.8 5.7 7.7 12.3 18 25 28.9 36.8 44.5 52.1 58.3 63 65.4 66.6 66.8 64.6 59.6 52.9
Milwaukee Milwaukee-16th St. Health Center ppb 32.9 29 27.1 25.8 25.1 25.2 24.7 24.4 25.6 29 32.6 36 38.8 42.8 48.4 54 58.1 60.5 59.9 58.8 57.6 56.9 54.7 51.8
Milwaukee Milwaukee-UWM UPark ppb 31.1 26 21.9 19.2 17.6 17.7 17.8 17.9 20.3 24.3 29.4 34.5 36.8 41.5 47.9 55.7 61 64.6 65.1 64.9 64.6 61.2 56.1 50.9
Outagamie Appleton ppb 52.5 51.3 49.7 47.3 46.1 40.7 35.7 32.5 30.9 31.4 32.3 35 38.4 44.3 50.3 55.1 58.3 59.9 60.5 60.1 59.1 58.4 57 55
Ozaukee Grafton ppb 45.2 41.1 38.6 35.6 34 30.8 28.3 27.7 28.2 30.6 33.7 38.6 42 48.4 54.9 61.2 66.1 69.7 71.4 71.7 70.5 68.4 64.5 60
Ozaukee Harrington Beach Park ppb 49.8 47.5 45.1 42.5 40.6 38.1 35.9 34.3 33.6 33.5 34.1 36.2 39.1 43 48.4 54.3 59.3 62.7 65.4 67.4 68.2 68.3 65.8 62
Racine Racine-Payne & Dolan ppb 32.2 28.6 25.5 24.3 23.3 23.8 23.4 23.6 24.9 27.3 29.5 31.7 34 37.3 42.4 47.6 51.4 53.6 55.7 57.2 57.8 57.6 56.7 55.4
Rock Beloit-Converse ppb 31.3 27.5 26 22.9 21.9 18 13 10.9 12.6 16.8 23 30 33.7 40.9 48.3 53.6 56.7 57.9 54.9 49.5 43.1 36.6 29.7 24.7
Sauk Devils Lake ppb 48.8 48.6 49.2 48.5 48.4 46.8 45.4 44.4 43.7 43.9 45.3 47.2 48.7 50.9 53.1 55.2 57.1 58.3 57.9 55.8 53.8 53 52.2 51.3
Sheboygan Sheboygan-Haven ppb 47.1 44.4 42.1 40.2 39.1 37.9 36 33.8 32.9 35.2 38.9 42.7 45.1 48.9 54.2 59.9 64.7 68 69.8 70 68.8 66.6 63.6 60.7
Sheboygan Sheboygan-Kohler Andrae ppb 36.4 32.9 29.2 25.1 24.1 22.7 18.4 15.9 15.3 16.1 18.2 21 22.4 25.1 29.9 33.9 37.1 40 42 43.3 45.2 44.8 45 43.5
Vilas Trout Lake ppb 47 47.1 47 46.8 47.2 47 45.7 44.6 44.1 44.1 44.6 45.2 46.1 47.6 49.6 51.6 53.1 54 53.7 52.9 52.5 52 51.3 50.7
Walworth Elkhorn ppb 44.7 42.1 41.4 38 37 35.2 33.5 32.4 33.3 36.7 40.9 46.5 48.6 52.7 56.7 60.1 61.3 60.1 57.2 54.9 53.4 52 49.6 47.1
Waukesha Waukesha-Cleveland Ave. ppb 48.7 43.1 37.9 33.1 29.3 25.2 23 22.1 23.2 27.2 32.1 37.6 40.6 45.6 50.8 55.8 60.1 63.2 65.6 67.1 67.8 66.9 65.5 62.8