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Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy PM2.5 levels is in effect from 8/4/2025 12:00 to 8/5/2025 12:00 for these counties: Adams,Ashland,Barron,Bayfield,Brown,Buffalo,Burnett,Calumet,Chippewa,Clark,Columbia,Crawford,Dane,Dodge,Door,Douglas,Dunn,Eau Claire,Florence,Fond du Lac,Forest,Grant,Green,Green Lake,Iowa,Iron,Jackson,Juneau,Jefferson,Kenosha,Kewaunee,Lafayette,La Crosse,Langlade,Lincoln,Manitowoc,Marathon,Marinette,Marquette,Menominee,Milwaukee,Monroe,Oconto,Oneida,Outagamie,Ozaukee,Pepin,Pierce,Polk,Portage,Price,Racine,Richland,Rock,Rusk,Sauk,Sawyer,Shawano,Sheboygan,St. Croix,Taylor,Trempealeau,Vernon,Vilas,Walworth,Washburn,Washington,Waukesha,Waupaca,Waushara,Winnebago,Wood .

Highest PM2.5

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Saturday, 
County Site Units 24-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton µg/m³ 38.6 07 AM 42.1 12 AM
Ashland Bad River Tribal School µg/m³ 48.9 12 AM 35.3 12 AM
Kenosha Chiwaukee Prairie µg/m³ 24.5 11 AM 40.9 04 AM
Sauk Devils Lake µg/m³ 21.9 03 PM 40.1 12 AM
Eau Claire Eau Claire DOT Sign Shop µg/m³ 44.6 12 AM 19.6 06 AM
Brown Green Bay East High µg/m³ 46.4 05 AM 42.9 12 AM
Ozaukee Harrington Beach Park µg/m³ 32.2 10 AM 33.5 12 AM
Jackson Ho-Chunk Nation-Black River Falls µg/m³ 21.2 05 AM 30.6 06 AM
Monroe Ho-Chunk Nation-Tomah µg/m³ 19.8 11 AM 33 06 AM
Dodge Horicon Wildlife Area µg/m³ 27.6 09 AM 34.2 12 AM
Marathon Lake Dubay µg/m³ 26 11 AM 37.8 04 AM
Dane Madison East µg/m³ 22.5 11 AM 36.3 12 AM
Dane Madison University Ave. Well #6 µg/m³ 28.7 10 AM 43.8 12 AM
Milwaukee Milwaukee-16th St. Health Center µg/m³ 37.6 11 AM 46.2 12 AM
Milwaukee Milwaukee-College Ave NR µg/m³ 32.9 11 AM 44.6 03 AM
Forest Potawatomi µg/m³ 56.5 09 AM 62.6 08 AM
Grant Potosi µg/m³ 4.6 05 AM 5.9 08 PM
Waukesha Waukesha-Cleveland Ave. µg/m³ 34.3 11 AM 47.3 12 AM