Maine air quality today

Every Maine metro we track

Sun over Maine today

The strongest UV in Maine today is 6.4 (High) in Portland, arriving around 12pm local time. The mildest of the 2 metros we model here peaks at 4.9 in Bangor.

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

What stands behind these Maine numbers

2 of the 2 metros here report from a named regulatory monitor — Southwest Coast, Eastern Interior. The dominant pollutant across Maine today is PM2.5.

We track 2 metropolitan areas in Maine, 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 Maine looks wrong the answer is often next door.