Where is the air worst in Wisconsin right now?

Milwaukee College Ave-Near Road has the highest current reading at AQI 31 (Good).

How often are readings updated?

Monitors report every hour. We refresh this page with the latest hour from EPA AirNow.

Wisconsin Air Quality

Current AQI at 16 monitors, highest 31 (Good) · Measured 10/30/2026, 8:00 AM PT

Monitors: 16
Highest AQI: 31; Good
Typical (median): 22; Good
Above 100: 0

Monitoring sites in Wisconsin

Worst first. Times are local.

31Milwaukee College Ave-Near RoadGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
26Appleton AALGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
25Lake DubayGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
24ChiwaukeeGood · Ozone · Fri 10/30/2026, 9:00 AM CDT
23Eau ClaireGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
23Green Bay East HighGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
23Waukesha-Cleveland AveGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
22PotosiGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
19Horicon Wildlife AreaGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
19Madison EastGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
19PotawatomiGood · Ozone · Fri 10/30/2026, 9:00 AM CDT
17Harrington BeachGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
16PerkinstownGood · Ozone · Fri 10/30/2026, 9:00 AM CDT
13Bad River Tribal SchoolGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
11Devils LakeGood · Fine particles (PM2.5) · Fri 10/30/2026, 9:00 AM CDT
11Kenosha-Water TowerGood · Ozone · Fri 10/30/2026, 9:00 AM CDT

By county

Highest current AQI among the county's monitors

Frequently asked questions

Where is the air worst in Wisconsin right now?: Milwaukee College Ave-Near Road has the highest current reading at AQI 31 (Good).
How often are readings updated?: Monitors report every hour. We refresh this page with the latest hour from EPA AirNow.

Source: EPA AirNow · Last updated 10/30/2026 · Data are preliminary and subject to change

What the AQI means

0-50Good. Air quality is satisfactory and poses little or no risk.
51-100Moderate. Acceptable. A few unusually sensitive people may have symptoms.
101-150Unhealthy for Sensitive Groups. People with heart or lung disease, older adults, children and teens should limit long or heavy outdoor exertion.
151-200Unhealthy. Everyone may begin to feel effects. Sensitive groups should avoid long or heavy outdoor exertion.
201-300Very Unhealthy. Health alert: the risk of health effects is increased for everyone.
301-500Hazardous. Health warning of emergency conditions. Everyone is more likely to be affected.

Data sources

AirNowU.S. Environmental Protection Agency · Official site

Data as of 10/30/2026

See something wrong? Request a correction

More about Wisconsin

More national data

About this data

Environmental hazards and flood zones: Flood zones, hazard scores and pollution data come from federal and state agencies and are for general information only. They are not an official flood zone determination, environmental assessment or insurance rating. For a property decision, request an official determination from your community floodplain administrator, insurer or a licensed professional. Maps may not show recent changes.

Weather and emergencies: Weather, air quality and hazard information on this page is delayed and may be incomplete. It is not a substitute for official warnings. Always follow the National Weather Service, local emergency management and public safety officials. In an emergency, call 911. For evacuation orders, use your local official alert system.

DatenUS is a private website and is not affiliated with or endorsed by any government agency. We republish public data from the sources listed on this page. Data can be incomplete, delayed or wrong. Always check the original source before you make a decision.

Our servers read this data automatically from government sources. Errors can come from the source itself or from the way we read, process or display it, and we do not guarantee that it is accurate, complete or current. Verify anything important with the official source.

Report an error Read the full disclaimer