Air Quality in North Carolina

North Carolina has 45 counties with EPA air quality monitoring. Air quality is generally improving across the state, with an average of 219 "Good" days per county per year. The best air quality is in Hyde (median AQI 24) and the most polluted is Wayne (median AQI 53).

County	Median AQI	Max AQI	Good Days	Unhealthy Days	Trend	Top Pollutant
Alamance	42	67	103	0	↓ improving	PM2.5
Alexander	41	93	213	0	→ stable	Ozone
Avery	38	90	222	0	→ stable	Ozone
Buncombe	43	81	245	0	→ stable	PM2.5
Caldwell	40	87	221	0	→ stable	Ozone
Carteret	35	71	357	0	→ stable	Ozone
Caswell	38	84	225	0	→ stable	Ozone
Catawba	42	93	232	0	→ stable	PM2.5
Chatham	38	64	197	0	↓ improving	Ozone
Cumberland	46	110	233	1	→ stable	PM2.5
Davidson	43	89	229	0	→ stable	PM2.5
Duplin	34	70	267	0	↓ improving	PM2.5
Durham	51	97	170	0	→ stable	PM2.5
Edgecombe	37	80	302	0	→ stable	PM2.5
Forsyth	47	122	210	4	→ stable	PM2.5
Franklin	43	93	171	0	↓ improving	Ozone
Gaston	38	65	29	0	↓ improving	PM2.5
Graham	44	90	199	0	→ stable	Ozone
Granville	42	101	206	1	→ stable	Ozone
Guilford	44	122	249	1	→ stable	PM2.5
Haywood	44	101	238	1	→ stable	Ozone
Hyde	24	60	89	0	↓ improving	PM2.5
Jackson	38	73	75	0	↓ improving	PM2.5
Johnston	43	84	261	0	→ stable	PM2.5
Lee	52	85	95	0	↓ improving	PM2.5
Lenoir	34	77	295	0	→ stable	Ozone
Lincoln	40	80	223	0	→ stable	Ozone
Macon	34	71	348	0	→ stable	Ozone
Martin	31	61	304	0	↓ improving	Ozone
McDowell	41	89	220	0	↓ improving	PM2.5
Mecklenburg	51	156	169	4	→ stable	PM2.5
Mitchell	31	93	288	0	→ stable	PM2.5
Montgomery	42	83	257	0	→ stable	PM2.5
New Hanover	39	97	293	0	↑ worsening	PM2.5
Northampton	32	82	289	0	↓ improving	PM2.5
Person	39	77	225	0	→ stable	Ozone
Pitt	37	74	302	0	→ stable	Ozone
Rockingham	43	100	205	0	→ stable	Ozone
Rowan	44	97	252	0	→ stable	Ozone
Swain	38	83	305	0	→ stable	PM2.5
Union	41	97	212	0	→ stable	Ozone
Wake	46	112	226	1	↓ improving	PM2.5
Watauga	30	85	188	0	↓ improving	PM2.5
Wayne	53	87	63	0	↓ improving	PM2.5
Yancey	44	84	167	0	→ stable	Ozone