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Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy PM2.5 levels is in effect from 7/31/2025 12:00 to 8/1/2025 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,Jefferson,Juneau,Kenosha,Kewaunee,La Crosse,Lafayette,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 8.8 11 AM 11.1 12 AM
Ashland Bad River Tribal School µg/m³ 8 03 AM 30.2 09 PM
Kenosha Chiwaukee Prairie µg/m³ 6.9 11 PM 13.9 11 PM
Sauk Devils Lake µg/m³ 7.1 02 AM 7.7 06 AM
Eau Claire Eau Claire DOT Sign Shop µg/m³ 6.4 03 AM 7.8 01 AM
Brown Green Bay East High µg/m³ 9 03 AM 11.3 01 PM
Ozaukee Harrington Beach Park µg/m³ 7.6 08 PM 10.1 08 PM
Dodge Horicon Wildlife Area µg/m³ 8.9 12 PM 10.4 04 AM
Marathon Lake Dubay µg/m³
Dane Madison East µg/m³ 7.8 06 AM 12.3 09 PM
Dane Madison University Ave. Well #6 µg/m³ 10.8 06 AM 15.2 06 AM
Milwaukee Milwaukee-16th St. Health Center µg/m³ 9.5 11 PM 13.5 08 PM
Milwaukee Milwaukee-College Ave NR µg/m³ 9.6 11 PM 18.4 09 PM
Forest Potawatomi µg/m³ 5.9 05 PM 9.4 08 AM
Grant Potosi µg/m³ 8.4 12 AM 9.4 04 AM
Waukesha Waukesha-Cleveland Ave. µg/m³ 10.1 05 PM 14.1 04 PM