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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 7/5/2025 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.

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 11.8 11 PM 16.4 08 PM
Ashland Bad River Tribal School µg/m³ 6.7 09 PM 13.3 07 PM
Kenosha Chiwaukee Prairie µg/m³ 5.9 08 PM 7.7 02 PM
Sauk Devils Lake µg/m³ 9.4 11 PM 11.3 02 PM
Eau Claire Eau Claire DOT Sign Shop µg/m³ 12.5 11 PM 18.3 08 AM
Brown Green Bay East High µg/m³ 12 11 PM 19.1 07 PM
Ozaukee Harrington Beach Park µg/m³ 8.1 11 PM 10.1 12 PM
Dodge Horicon Wildlife Area µg/m³ 8.7 10 PM 11.1 01 PM
Marathon Lake Dubay µg/m³
Dane Madison East µg/m³ 8.1 10 PM 11.8 08 PM
Dane Madison University Ave. Well #6 µg/m³ 8.8 10 PM 16.3 06 PM
Milwaukee Milwaukee-16th St. Health Center µg/m³ 8.3 09 PM 15.8 08 PM
Milwaukee Milwaukee-College Ave NR µg/m³ 9.2 09 PM 15.6 07 PM
Forest Potawatomi µg/m³ 8.3 11 PM 13.6 11 PM
Grant Potosi µg/m³ 8.3 09 PM 10.8 01 PM
Waukesha Waukesha-Cleveland Ave. µg/m³ 7.9 09 PM 14.5 07 PM