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Wisconsin air quality today

Updated · LIVE · 2 metros tracked

Across the 2 Wisconsin metros we measure, air is worst right now in Milwaukee at AQI 39 (Good) and cleanest in Madison at AQI 31.

Every Wisconsin metro we track

#MetroAQIUV nowDominant
1 Milwaukee 39Good 3.5 O3
2 Madison 31Good 4 PM2.5

Sun over Wisconsin today

The strongest UV in Wisconsin today is 6.2 (High) in Madison, arriving around 1pm local time. The mildest of the 2 metros we model here peaks at 5.9 in Milwaukee.

6.2 Madison 1pm5.9 Milwaukee 2pm

UV is modelled, not measured — unlike the AQI above it, which comes off an instrument. Hour by hour in Madison →

What stands behind these Wisconsin numbers

2 of the 2 metros here report from a named regulatory monitor — Madison Area, Milwaukee-Ozaukee. The dominant pollutant across Wisconsin today is PM2.5 in some metros, O3 in others.

We track 2 metropolitan areas in Wisconsin, not the whole state, and 2 of them have a page of its own. There is no state-wide average here on purpose: averaging 2 metros into one figure would invent a value for all the ground between them. How we measure, and what we refuse to estimate →

Neighbouring states

Smoke and inversions do not stop at a state line, so when Wisconsin looks wrong the answer is often next door.

IowaIllinoisMichiganMinnesota
Worst air in the US right nowHow Wisconsin compares against every metro we track What the number meansEPA bands, and where “unhealthy for everyone” starts

Updated