Air Quality in Nebraska

Nebraska has 13 counties with EPA air quality monitoring. Air quality is generally improving across the state, with an average of 207 "Good" days per county per year. The best air quality is in Thomas (median AQI 12) and the most polluted is Douglas (median AQI 45).

County	Median AQI	Max AQI	Good Days	Unhealthy Days	Trend	Top Pollutant
Cass	17	68	259	0	↓ improving	PM10
Dawson	14	49	12	0	↓ improving	PM10
Douglas	45	101	233	1	→ stable	PM2.5
Gage	35	70	224	0	↑ worsening	PM2.5
Garden	16	75	113	0	↓ improving	PM2.5
Hall	32	80	248	0	→ stable	PM2.5
Knox	36	108	300	1	→ stable	Ozone
Lancaster	41	82	237	0	→ stable	Ozone
Sarpy	37	110	244	1	↓ improving	PM2.5
Scotts Bluff	16	89	284	0	↓ improving	PM2.5
Sioux	44	143	254	8	↑ worsening	Ozone
Thomas	12	36	22	0	→ stable	PM2.5
Washington	34	81	268	0	↓ improving	PM2.5