-
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

Filter by County:
Filter by Site:
Wednesday, 
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 27.7 24.6 24.2 24.6 25.1 23 20.3 18.8 19 21.1 21.4 22.6 24.7 28.2 30.9 32.6 33.9 34.9 33.8 31.2 27.3 22.4 18.6 14.9
Brown Green Bay UW ppb 36.8 35.5 33.6 32.2 30.6 28.7 26.3 25 24.8 24.9 26.3 29 33.5 38.9 45.5 50.8 54.8 57.8 58.9 58.7 57.1 54.4 50.4 46.1
Columbia Columbus ppb 19.1 16.5 15 14.4 14.8 15.3 16.6 18.9 22.3 26.1 30.6 35.4 40 45.1 49.9 54 56.5 57.3 56.7 55.4 53.5 51.1 48.6 45.6
Dane Madison East ppb 21.8 20.7 20.7 21.3 22.5 23.9 25.8 27.8 30.1 32.9 35.6 38.6 41.5 44.7 47.6 50.1 51.8 52.1 50.8 48 44.8 41.3 37.6 34.3
Dodge Horicon Wildlife Area ppb 29.1 27.9 27.2 27 26.6 26.2 26.2 27.3 29.6 32.7 36.2 39.9 44.4 49.2 53.4 56.7 58.5 58.7 58.1 56.7 54.2 51.1 48 44.8
Door Newport Park ppb 38.9 38.4 37.1 35.3 33.9 32.3 30.9 30.3 30.1 30.4 31.6 33.6 36.3 39.4 43 46.8 50.7 54.2 57.1 59 59.9 60.1 59.9 59.2
Eau Claire Eau Claire DOT Sign Shop ppb 27.1 23.1 20.5 19 15.9 13.4 12.3 12.5 12.6 12.2 11.4 16.3 23.6 32.2 40.7 48.3 54.6 54.3 53.3 52.8 50.6 48.1 44.9 41.3
Fond du Lac Fond Du Lac ppb 29.4 28 27.4 27.1 26.5 25.9 25.3 25.8 27.1 29.8 33.3 36.5 40 44.2 48.7 52.1 54.7 55.3 54.3 53.3 51.3 48.5 44.9 41.3
Forest Potawatomi ppb 32.2 32.2 32.2 32 31.4 30.7 30 29.2 28.5 28.2 28.3 28.6 29.6 31.4 33.5 35.7 38.1 39.8 41.2 42.2 43 43.1 42.7 41.9
Jefferson Jefferson-Laatsch ppb 18.4 17.3 17.2 17.7 18.6 20.3 23.3 26.3 30.1 33.8 37.3 41.2 45.2 48.8 51.2 53.7 54.9 54.6 53.2 49.9 45.1 39.9 33.9 27.6
Kenosha Chiwaukee Prairie ppb 31.5 30.4 29.3 28.5 27.7 27.3 27.7 29.2 30.3 32.8 34.7 35.4 36.2 38.8 42.6 44.8 47.1 46.9 44.6 43 41.2 37.1 31.1 25.3
Kenosha Kenosha-Water Tower ppb 29.4 29 28.3 27.9 27.3 27.1 29.3 31.9 34 35.2 37.3 39.1 39.3 40.3 39.5 39.1 39.5 40.7 41.1 42.2 43.3 45.2 46.9 48.2
Kewaunee Kewaunee ppb 41 39.5 38 36.3 34.9 33.6 32.4 31.7 31.9 32.5 34 36.6 39.5 43.1 47.3 51.4 55.1 57.5 58.1 57.4 56 53.7 50.4 46.4
La Crosse La Crosse DOT ppb 34.4 30.5 27.4 24.5 20.7 17 13.4 11.1 9.9 9.4 10 11.6 14.5 18.6 23.8 28.2 32.8 36.9 39.1 40.1 40.8 40.3 38.5 36.4
Manitowoc Manitowoc ppb 39.4 38 37 35.8 34.6 33.6 32.9 32.1 31.5 32.2 33.8 35.8 39 42.8 46.4 50.6 54.1 55.7 55.7 55.2 54.2 52.3 49.7 43.6
Marathon Lake Dubay ppb 33.5 30.8 28 25.3 22.9 20.8 18.8 17.2 16.2 15.7 16.4 18.2 21.5 25.7 30.8 35.8 40.6 44.4 47 48.3 48.3 47 44.6 41.9
Milwaukee Bayside ppb 33.3 32 30.8 29.6 28 26.2 24.7 23.8 22.4 21.3 23 26.4 30.8 35.1 38 40.6 44.1 47.1 45.8 42.1 36.8 31.2 26.9 22.3
Milwaukee Milwaukee-16th St. Health Center ppb 27.3 26.9 26.4 25.9 25.1 23.6 22.1 22.4 23.7 26.1 28.6 31.1 33.9 38 42.3 45.2 46.8 47 45.5 43.7 40.7 38.4 37.3 35.9
Milwaukee Milwaukee-UWM UPark ppb 33.7 32.6 31.9 31.1 29.9 28.8 28.2 28.1 28.5 30.1 31.4 34.2 37.8 40.8 42.9 44.5 45.6 44.9 43 38.6 34.1 30.1 26 23
Outagamie Appleton ppb 29.1 27 25 23.1 21.6 18.8 16.1 14.2 14.2 14.7 17.2 20.8 25.6 32.4 39.2 45.3 49.8 53.6 54.5 53.9 50.9 46.5 41.6 36.8
Ozaukee Grafton ppb 35.5 34 32.1 30 28.7 26.6 24.2 22.7 22.4 24 27.2 31.1 35.4 40.9 45.8 48.9 51.5 52.4 51.6 49.3 43.4 38 34.1 31
Ozaukee Harrington Beach Park ppb 38.6 37.4 36.3 35 33.8 32.7 31.6 30.7 31 33.1 34.6 37.5 41.4 45.8 49.8 52.3 54.3 54.8 55.4 54.3 51.3 47.2 43 40.1
Racine Racine-Payne & Dolan ppb 28.8 28.3 28 27.8 27.4 27.4 27.3 28.2 29.4 30.9 32.6 34.1 35.3 36.1 37.8 39.6 40.9 41.6 41.3 42.7 44 45.7 45.7 44.5
Rock Beloit-Converse ppb 23 23.4 24.1 24.7 26.5 29.7 33 36.6 39.7 41.9 43.7 45.9 47.3 45.7 44.6 43.8 43 41.6 39.4 36.6 33.8 32.9 30.2 26.2
Sauk Devils Lake ppb 28.6 27.3 26.7 26.4 27.2 28.4 29.4 30.3 31.3 32.3 33.8 35.9 37.8 39.8 42.3 45.2 47.8 48.4 46.7 44 41.1 37.8 34.2 29.9
Sheboygan Sheboygan-Haven ppb 35.8 35.4 34.4 33.3 31.8 30.7 29.5 28.6 28 28.5 30.6 32.3 35.6 39.2 43.6 48.1 51.8 53.3 53.2 53.2 51.7 48.5 44.2 39.6
Sheboygan Sheboygan-Kohler Andrae ppb 39 38.2 37.2 36.4 35.9 35.1 34.3 33.5 32.5 32.6 34 37.1 40.2 44.4 48.5 51.5 53.9 55.8 57 56.6 54.4 50.1 44.7 40.6
Vilas Trout Lake ppb 37.5 36 34.4 32.5 30.7 29.1 28 27 26.7 26.2 26.2 26.7 28.1 30.5 33.5 37 39.8 41.7 42.9 41.5 39 35.8 32.8 29.6
Walworth Elkhorn ppb 16.4 17.7 20 22.7 25.9 28.7 32.1 35.7 38.4 40.4 42.5 44.7 46.2 47.4 47.7 47.8 47.8 47 43.6 40.2 36.7 34.5 32.5 30.7
Waukesha Waukesha-Cleveland Ave. ppb 28 27.8 27.7 27.3 26.8 26.4 26.1 26.7 28.7 31.2 34.3 38 42.1 46.5 50.1 52.3 52.8 52.4 51.1 48.1 43.9 39.5 35 31.1