Air Quality in Wyoming

Wyoming has 20 counties with EPA air quality monitoring. Air quality is stable across the state, with an average of 285 "Good" days per county per year. The best air quality is in Uinta (median AQI 7) and the most polluted is Albany (median AQI 50).

County	Median AQI	Max AQI	Good Days	Unhealthy Days	Trend	Top Pollutant
Albany	50	187	190	13	→ stable	Ozone
Big Horn	39	119	315	2	→ stable	Ozone
Campbell	44	161	232	5	→ stable	Ozone
Carbon	8	35	356	0	↓ improving	Ozone
Converse	41	185	300	13	→ stable	Ozone
Fremont	49	139	210	5	→ stable	Ozone
Goshen	43	78	275	0	↓ improving	Ozone
Johnson	40	112	327	1	↑ worsening	Ozone
Laramie	45	151	271	4	→ stable	Ozone
Lincoln	31	77	340	0	↑ worsening	PM10
Natrona	43	136	282	6	→ stable	Ozone
Park	13	88	322	0	↓ improving	PM2.5
Platte	19	927	325	9	↑ worsening	PM10
Sheridan	44	205	281	16	→ stable	Ozone
Sublette	46	115	244	7	→ stable	Ozone
Sweetwater	45	137	247	10	→ stable	Ozone
Teton	44	138	276	2	→ stable	Ozone
Uinta	7	44	297	0	↓ improving	PM10
Washakie	8	83	309	0	↑ worsening	PM2.5
Weston	39	136	320	5	→ stable	Ozone