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Michigan air quality today

Updated · LIVE · 2 metros tracked

Across the 2 Michigan metros we measure, air is worst right now in Detroit at AQI 55 (Moderate) and cleanest in Grand Rapids at AQI 42.

Every Michigan metro we track

#MetroAQIUV nowDominant
1 Detroitno page yet 55Moderate 5.3 PM2.5
2 Grand Rapidsno page yet 42Good 3 PM2.5

Sun over Michigan today

The strongest UV in Michigan today is 5.7 (High) in Grand Rapids, arriving around 3pm local time. The mildest of the 2 metros we model here peaks at 5.3 in Detroit.

5.7 Grand Rapids 3pm5.3 Detroit 1pm

UV is modelled, not measured — unlike the AQI above it, which comes off an instrument. How we handle UV →

What stands behind these Michigan numbers

2 of the 2 metros here report from a named regulatory monitor — Southeast, Grand Rapids. The dominant pollutant across Michigan today is PM2.5.

We track 2 metropolitan areas in Michigan, not the whole state, and none of them has its own page yet — a metro page ships only after thirty days of our own history, and that clock is running. 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 Michigan looks wrong the answer is often next door.

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

Updated