Air Quality Rankings for Missouri 2026

Missouri has 21 cities with EPA air quality data. Taney, Missouri has the cleanest air with a 5-year average AQI of 26. St. Louis City, Missouri has the highest AQI at 55.

#	City	5yr Avg AQI	Current AQI	Worst Pollutant	Trend	Grade
1	Taney, Missouri	26	29	PM2.5	Improving	A
2	Stoddard, Missouri	31	37	PM2.5	Improving	B
3	Monroe, Missouri	34	38	Ozone	Stable	B
4	Boone, Missouri	38	42	Ozone	Stable	B
5	Jasper, Missouri	39	42	Ozone	Worsening	C
6	Callaway, Missouri	39	43	Ozone	Stable	B
7	Sainte Genevieve, Missouri	40	44	Ozone	Stable	B
8	Lincoln, Missouri	40	44	Ozone	Stable	C
9	Perry, Missouri	40	44	Ozone	Stable	B
10	Clinton, Missouri	40	44	Ozone	Stable	B
11	Andrew, Missouri	41	43	Ozone	Stable	C
12	Cass, Missouri	41	44	PM2.5	Improving	B
13	Clay, Missouri	41	43	Ozone	Improving	B
14	Saint Charles, Missouri	42	45	Ozone	Stable	C
15	Cedar, Missouri	42	44	PM2.5	Stable	C
16	Jefferson, Missouri	43	44	PM2.5	Improving	B
17	Buchanan, Missouri	44	48	PM2.5	Improving	B
18	Greene, Missouri	44	49	PM2.5	Stable	C
19	Saint Louis, Missouri	45	46	PM2.5	Improving	B
20	Jackson, Missouri	51	52	PM2.5	Worsening	C
21	St. Louis City, Missouri	55	58	PM2.5	Stable	C

Air quality data for Missouri is sourced from the EPA Air Quality System (AQS), which monitors outdoor air quality at thousands of stations nationwide.
— EPA Air Quality System

Frequently Asked Questions

Taney, Missouri has the best air quality in Missouri with a 5-year average AQI of 26 and a grade of A.

Missouri has 21 cities with EPA air quality monitoring data in our database, covering multiple years of AQI measurements.

The Air Quality Index (AQI) measures five major pollutants: ground-level ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. Lower AQI values indicate cleaner air — 0-50 is "Good," while 150+ is "Unhealthy."

Sources: EPA Air Quality System (AQS)

Cities ranked by 5-year average AQI (lower is better). Grades factor in average AQI, trend direction, unhealthy days, and dominant pollutant.

Cleanest Cities Nationwide →All Air Quality in Missouri →