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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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Wednesday, 
County Site Units 24-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton µg/m³ 16.6 07 AM 20 12 AM
Ashland Bad River Tribal School µg/m³ 11.8 04 AM 11.4 08 AM
Kenosha Chiwaukee Prairie µg/m³ 17.4 05 AM 17.2 11 AM
Sauk Devils Lake µg/m³ 13.7 12 AM 16.2 03 AM
Eau Claire Eau Claire DOT Sign Shop µg/m³ 11.9 12 AM 11.4 03 AM
Brown Green Bay East High µg/m³ 18.5 08 AM 20.7 12 AM
Ozaukee Harrington Beach Park µg/m³ 16.5 06 AM 15.7 01 PM
Jackson Ho-Chunk Nation-Black River Falls µg/m³ 13.2 02 AM 14.1 02 AM
Monroe Ho-Chunk Nation-Tomah µg/m³ 13.1 03 AM 15 01 AM
Dodge Horicon Wildlife Area µg/m³ 17.8 06 AM 20.9 06 AM
Marathon Lake Dubay µg/m³ 13.7 06 AM 18.1 02 AM
Dane Madison East µg/m³ 15.4 05 AM 19.4 04 AM
Dane Madison University Ave. Well #6 µg/m³ 17.3 05 AM 20.2 03 AM
Milwaukee Milwaukee-16th St. Health Center µg/m³ 21.4 06 AM 20 12 PM
Milwaukee Milwaukee-College Ave NR µg/m³ 19.2 05 AM 18.4 08 AM
Forest Potawatomi µg/m³ 16.9 08 AM 20 12 AM
Grant Potosi µg/m³ 15.5 12 AM 14.6 12 AM
Waukesha Waukesha-Cleveland Ave. µg/m³ 19.2 06 AM 19.1 07 AM