Air Quality in Kentucky

Kentucky has 28 counties with EPA air quality monitoring. Air quality is generally improving across the state, with an average of 223 "Good" days per county per year. The best air quality is in Carter (median AQI 37) and the most polluted is Henderson (median AQI 53).

County	Median AQI	Max AQI	Good Days	Unhealthy Days	Trend	Top Pollutant
Bell	44	88	244	0	↑ worsening	PM2.5
Boone	43	129	183	1	→ stable	Ozone
Boyd	42	93	275	0	→ stable	PM2.5
Bullitt	43	105	201	1	→ stable	Ozone
Campbell	40	108	285	3	↓ improving	PM2.5
Carter	37	62	321	0	→ stable	PM2.5
Christian	42	84	274	0	→ stable	PM2.5
Daviess	37	62	31	0	→ stable	PM2.5
Edmonson	38	77	329	0	↓ improving	Ozone
Fayette	41	77	266	0	→ stable	Ozone
Greenup	40	74	221	0	→ stable	Ozone
Hancock	44	100	200	0	→ stable	Ozone
Hardin	41	67	129	0	↓ improving	PM2.5
Henderson	53	71	29	0	↓ improving	PM2.5
Jefferson	50	156	186	12	→ stable	PM2.5
Jessamine	43	93	200	0	→ stable	Ozone
Livingston	42	90	220	0	→ stable	Ozone
Madison	39	73	84	0	↓ improving	PM2.5
McCracken	42	101	269	1	↓ improving	PM2.5
Morgan	38	64	334	0	→ stable	Ozone
Oldham	43	136	194	5	→ stable	Ozone
Perry	40	117	290	1	→ stable	PM2.5
Pike	38	79	285	0	↓ improving	PM2.5
Pulaski	41	68	292	0	→ stable	PM2.5
Simpson	43	97	204	0	→ stable	Ozone
Trigg	39	80	116	0	→ stable	Ozone
Warren	39	87	290	0	→ stable	PM2.5
Washington	39	74	315	0	→ stable	Ozone