Air Quality in South Carolina

South Carolina has 20 counties with EPA air quality monitoring. Air quality is generally improving across the state, with an average of 183 "Good" days per county per year. The best air quality is in Georgetown (median AQI 14) and the most polluted is Spartanburg (median AQI 49).

County	Median AQI	Max AQI	Good Days	Unhealthy Days	Trend	Top Pollutant
Abbeville	25	33	9	0	↓ improving	Ozone
Aiken	39	84	238	0	→ stable	Ozone
Anderson	43	115	213	1	→ stable	Ozone
Berkeley	37	90	255	0	→ stable	Ozone
Charleston	43	77	269	0	→ stable	PM2.5
Cherokee	41	101	148	1	↓ improving	Ozone
Chesterfield	44	143	234	2	→ stable	PM2.5
Colleton	26	41	7	0	↓ improving	PM2.5
Darlington	40	100	224	0	→ stable	Ozone
Edgefield	44	98	231	0	→ stable	PM2.5
Florence	44	99	230	0	→ stable	PM2.5
Georgetown	14	52	91	0	↓ improving	PM10
Greenville	48	99	198	0	→ stable	PM2.5
Horry	40	87	287	0	↑ worsening	PM2.5
Lexington	41	77	96	0	→ stable	PM2.5
Oconee	37	74	241	0	↓ improving	PM2.5
Pickens	44	84	77	0	↓ improving	Ozone
Richland	47	141	210	1	→ stable	PM2.5
Spartanburg	49	112	188	4	→ stable	PM2.5
York	46	112	226	1	↑ worsening	PM2.5