Air Quality Rankings for Wyoming 2026

Wyoming has 18 cities with EPA air quality data. Carbon, Wyoming has the cleanest air with a 5-year average AQI of 16. Albany, Wyoming has the highest AQI at 48.

#	City	5yr Avg AQI	Current AQI	Worst Pollutant	Trend	Grade
1	Carbon, Wyoming	16	8	Ozone	Improving	A
2	Platte, Wyoming	16	14	PM10	Stable	B
3	Park, Wyoming	20	14	PM2.5	Stable	B
4	Uinta, Wyoming	21	6	Ozone	Improving	A
5	Lincoln, Wyoming	29	44	PM10	Worsening	C
6	Big Horn, Wyoming	38	39	Ozone	Stable	B
7	Johnson, Wyoming	40	40	Ozone	Worsening	C
8	Weston, Wyoming	41	42	Ozone	Stable	B
9	Sheridan, Wyoming	41	43	Ozone	Worsening	C
10	Converse, Wyoming	41	42	Ozone	Stable	B
11	Natrona, Wyoming	42	42	Ozone	Stable	C
12	Laramie, Wyoming	43	45	Ozone	Stable	C
13	Teton, Wyoming	43	43	Ozone	Stable	C
14	Campbell, Wyoming	44	45	Ozone	Stable	C
15	Sweetwater, Wyoming	46	47	Ozone	Stable	C
16	Sublette, Wyoming	46	47	Ozone	Stable	C
17	Fremont, Wyoming	46	49	Ozone	Stable	C
18	Albany, Wyoming	48	48	Ozone	Stable	C

Air quality data for Wyoming 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

Carbon, Wyoming has the best air quality in Wyoming with a 5-year average AQI of 16 and a grade of A.

Wyoming has 18 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 Wyoming →