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Missouri air quality today

Updated · LIVE · 2 metros tracked

Across the 2 Missouri metros we measure, air is worst right now in St. Louis at AQI 49 (Good) and cleanest in Kansas City at AQI 39.

Every Missouri metro we track

#MetroAQIUV nowDominant
1 St. Louis 49Good 5.8 PM2.5
2 Kansas Cityno page yet 39Good 3 O3

Sun over Missouri today

The strongest UV in Missouri today is 6.7 (High) in St. Louis, arriving around 1pm local time. The mildest of the 2 metros we model here peaks at 6.6 in Kansas City.

6.7 St. Louis 1pm6.6 Kansas City 2pm

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

What stands behind these Missouri numbers

2 of the 2 metros here report from a named regulatory monitor — St. Louis (Metro-east), Kansas City. The dominant pollutant across Missouri today is PM2.5 in some metros, O3 in others.

We track 2 metropolitan areas in Missouri, not the whole state, and 1 of them has 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 Missouri looks wrong the answer is often next door.

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

Updated