-
Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy for Sensitive Groups OZONE levels is in effect from 7/4/2025 08:00 to 7/4/2025 23:00 for these counties: Kenosha,Milwaukee,Ozaukee,Racine .
  • 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

Filter by County:
Filter by Site:
Wednesday, 
County Site Units 24-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton µg/m³ 8.8 12 AM 7.6 07 AM
Ashland Bad River Tribal School µg/m³ 6.3 12 AM 6.1 03 AM
Kenosha Chiwaukee Prairie µg/m³ 7.4 12 AM 8.3 10 AM
Sauk Devils Lake µg/m³ 8 12 AM 6.3 08 PM
Eau Claire Eau Claire DOT Sign Shop µg/m³ 8.5 12 AM 5.6 10 PM
Brown Green Bay East High µg/m³ 8.6 01 AM 9.5 01 AM
Ozaukee Harrington Beach Park µg/m³ 7.2 12 AM 7.2 12 AM
Dodge Horicon Wildlife Area µg/m³ 7.5 12 AM 6.5 08 AM
Marathon Lake Dubay µg/m³
Dane Madison East µg/m³ 7.3 12 AM 7.1 07 AM
Dane Madison University Ave. Well #6 µg/m³ 8 12 AM 7.7 07 AM
Milwaukee Milwaukee-16th St. Health Center µg/m³ 8.9 12 AM 7.8 10 AM
Milwaukee Milwaukee-College Ave NR µg/m³ 7.9 12 AM 7.3 09 AM
Forest Potawatomi µg/m³ 8.8 01 AM 13.4 12 AM
Grant Potosi µg/m³ 8.1 12 AM 9.6 06 PM
Waukesha Waukesha-Cleveland Ave. µg/m³ 8.4 12 AM 7.9 09 AM