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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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Tuesday, 
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 48.1 48.4 50.2 52.4 52.7 52.6 52.2 51.5 50.6 49.9 49.5 49.7 50.3 51.2 52.3 53.5 54.8 55.9 56.6 56.8 56.6 56.2 55.9 55.4
Brown Green Bay UW ppb 65.2 63.6 62.1 59.8 56.4 53.4 49.8 47 45 45.3 46.3 48.3 51.6 54.5 58.2 61.9 64.9 66.6 68.1 68.9 69.3 69.5 69.1 68.3
Columbia Columbus ppb 48.5 46.8 44.8 42.6 40.3 38.2 35.9 34.5 34.3 35.2 37.7 40.8 44.5 48.7 53.3 57.3 60.3 61.8 61.7 61.1 59.6 57.5 55.3 53.5
Dane Madison East ppb 42.4 39.5 37.1 34.1 30.9 27.9 25.6 24.9 25.3 27 30.4 35.1 40.6 46 51.1 55.6 59.1 61 61 60.6 59.7 58.7 57.2 55.3
Dodge Horicon Wildlife Area ppb 56.9 55 53.4 51.5 49 46.3 43.3 40.1 38.3 38.9 40.7 43.7 47.5 51.9 56.8 62 65.9 67.2 67 65.9 64.5 62.6 59.9 56.8
Door Newport Park ppb 64.8 62.6 59.3 56.3 53.3 50.5 48.2 47.1 47.1 48.2 48.7 50.6 53.5 56.9 60.3 63.6 65.5 66.6 66.8 67.7 68.2 67.9 67.1 66.1
Eau Claire Eau Claire DOT Sign Shop ppb 55.2 54.4 53.5 52.3 51.2 49 47 45.3 44.6 44.5 44.8 45.8 47.5 50.1 52.6 54.7 56 56.8 57 56.7 56.1 55.4 54.4 53.1
Fond du Lac Fond Du Lac ppb 54.4 53.7 52.8 51.9 50.2 47.7 45 42.2 40.4 40.5 42.1 43.9 46.6 49.8 53.7 57.6 60.4 60.9 60.3 60.3 59.6 58.5 56.8 54.8
Forest Potawatomi ppb 54.1 53.7 53.5 53.2 52.9 52.6 52.4 52.3 51.9 52 53 54.3 55.8 57.2 58.7 59 60.2 60.8 60.5 60.1 59.7 59.3 59 58.4
Jefferson Jefferson-Laatsch ppb 36.6 32.4 29.5 26.4 22.8 20.5 17.7 17 18.3 21.7 26.5 32.4 39.2 46 53 58.7 62.9 64.4 63.8 62 59.1 55.3 52 48.9
Kenosha Chiwaukee Prairie ppb 60.8 58.3 54.5 49.3 42.9 36.4 29.5 23.6 18.8 16.3 15.9 18 22.2 28.5 37.6 45.8 53.1 59.1 64.6 68.3 71.1 71.5 68.3 63.5
Kenosha Kenosha-Water Tower ppb 60.6 56.5 52 46.8 40.3 34 28.4 23.4 20.2 20.8 23.7 28.6 35 41.7 49.3 56.6 62.3 66.3 68.8 69.7 70.4 70 66.2 61.7
Kewaunee Kewaunee ppb 61.3 58.5 56.4 55.4 53.8 52.7 51 49.3 48.4 49.1 50.1 50.8 52.6 54.7 57.4 60.3 62.8 64.6 65.4 66.1 66.9 67.6 67.6 67.7
La Crosse La Crosse DOT ppb 58 56.5 55 53.4 50.8 48.9 46.7 45.1 43.7 42.9 43.5 44.7 46.9 49 51.3 53.7 55.8 57.6 58.1 57.8 56.7 54.9 53.2 51.3
Manitowoc Manitowoc ppb 56.8 54.2 50.7 46.7 44.2 42 40.5 39.9 39.4 39 40.6 43.3 45.6 48.7 51.8 54.5 56.7 58.6 59.5 60.8 62.6 63.7 64.2 64.3
Marathon Lake Dubay ppb 48 46.5 45.1 43.2 41.5 39.9 38.6 37.2 37 38.2 37.9 38.1 41.9 45.8 49.9 53.9 56.5 56.8 56.1 55.3 54.2 53.3 52.4 51.5
Milwaukee Bayside ppb 45.5 37.5 30.7 23.9 16.9 11.2 8.2 7 7.8 11.5 15.7 20.9 27.1 33.7 41.1 48.1 54.8 58.9 62.9 65.6 67.6 69.4 70 68.9
Milwaukee Milwaukee-16th St. Health Center ppb 48.8 45.7 44 41.8 37.2 31.1 26.3 24.2 23.2 23.4 25.3 28.7 34.7 42.5 49.5 54.6 58.7 60.8 61.1 59.6 58.3 57.1 55.3 52.1
Milwaukee Milwaukee-UWM UPark ppb 45.2 38.6 33.7 29.7 24.9 22.1 19.5 17.6 18.2 21.2 24.8 28.4 33.1 38.4 45.4 51.3 55.9 59.2 62.2 65.1 67.2 69 69.2 67.3
Outagamie Appleton ppb 53.2 51.4 50.3 48.6 46 42.4 39.1 37.4 36.4 35.9 36.3 39.2 43.2 47.7 52.8 56.3 59.3 61.9 63.4 62.4 62.1 61.6 60.7 59.8
Ozaukee Grafton ppb 56.1 52.3 47.5 43.1 36.5 31 26.3 23.9 22 21.6 23.8 27.5 34.5 41.8 49.9 55.9 61.6 65.9 69.3 71.9 73.4 74.3 74.2 73.4
Ozaukee Harrington Beach Park ppb 58.5 55.7 53.3 50.5 47.5 44 41.2 39.5 38.5 37.5 36.8 37.5 39.6 43.1 48.2 53.1 57.4 62.7 67 69.7 70.9 71.3 71 70.2
Racine Racine-Payne & Dolan ppb 53.9 52.8 50.9 47.4 43.2 39.1 34.3 30.1 27.4 24.8 23.5 24.4 27.1 30.6 36 41.8 46.8 51.5 55.5 58.7 60.9 62.3 61.9 59.2
Rock Beloit-Converse ppb 19.6 14.3 11.8 11.3 11.2 10.8 10.5 10.8 13 17.4 23 29.6 37 44.5 52.1 57.7 61.4 62.4 61.8 60 57.1 54.6 52.6 50.7
Sauk Devils Lake ppb 50.3 49.6 50.2 51.5 52.1 51.3 50.1 49.2 48.8 48.4 48.1 48.7 49.9 51.3 53.2 54.8 56 57 57.2 57.1 56.9 56.8 56.7 56.4
Sheboygan Sheboygan-Haven ppb 57.8 54.3 51 48.9 47.6 46.1 43.8 41.5 40.3 40.1 41.2 43 45.9 49.9 55.5 61.5 66 69.3 71.6 73.3 73.7 73 71.3 69.2
Sheboygan Sheboygan-Kohler Andrae ppb 41.5 39.9 39.1 36.6 33.6 29.5 25.1 23.7 22.9 22.1 21.1 22.5 24 29.1 34 38.2 41.8 45.3 48.5 50.9 52.5 52.3 51.4 50.1
Vilas Trout Lake ppb 50.4 50.7 52 53.3 52.5 51.2 50.2 49.5 48.8 48.2 48.1 48.7 51 53.6 55.9 57.5 57.5 58 57.9 57.7 57.1 56.3 55.8 55.4
Walworth Elkhorn ppb 44.6 43.5 43.8 42.9 41.4 39.5 38.1 36 36.9 38.7 41.1 44.4 47.4 50.5 54.2 58.3 60.1 60.2 58.4 56 53 49.8 46.5 44
Waukesha Waukesha-Cleveland Ave. ppb 59.1 53.3 46.6 40 32.5 26.3 20.4 16.9 16.3 18.6 22.7 27.8 34.5 41.6 49.3 55.9 60.2 63.1 64.7 65.1 65 64.4 62.4 59.6