Air Quality in Texas

Texas has 46 counties with EPA air quality monitoring. Air quality is generally worsening across the state, with an average of 226 "Good" days per county per year. The best air quality is in Karnes (median AQI 7) and the most polluted is El Paso (median AQI 67).

County	Median AQI	Max AQI	Good Days	Unhealthy Days	Trend	Top Pollutant
Atascosa	44	116	198	8	↑ worsening	PM2.5
Bell	46	129	226	5	↑ worsening	Ozone
Bexar	52	199	174	22	→ stable	PM2.5
Bowie	49	97	189	0	→ stable	PM2.5
Brazoria	37	164	303	6	→ stable	Ozone
Brazos	39	102	232	1	↑ worsening	PM2.5
Brewster	43	112	231	2	→ stable	Ozone
Cameron	61	171	99	61	↑ worsening	PM2.5
Collin	40	161	283	11	→ stable	Ozone
Culberson	26	88	99	0	↑ worsening	PM2.5
Dallas	55	185	129	19	→ stable	PM2.5
Denton	47	187	210	28	→ stable	Ozone
Ector	36	88	280	0	→ stable	PM2.5
El Paso	67	431	81	63	→ stable	Ozone
Ellis	36	101	323	1	↓ improving	Ozone
Fayette	34	96	262	0	↓ improving	PM2.5
Galveston	44	159	245	8	↑ worsening	Ozone
Gregg	37	129	322	2	→ stable	Ozone
Harris	61	201	50	47	→ stable	PM2.5
Harrison	44	263	233	3	→ stable	PM2.5
Hidalgo	54	157	150	24	→ stable	PM2.5
Hood	40	154	274	6	→ stable	Ozone
Hunt	37	133	324	2	→ stable	Ozone
Jefferson	53	143	137	8	→ stable	PM2.5
Johnson	39	129	286	10	→ stable	Ozone
Karnes	7	33	363	0	↑ worsening	Ozone
Kaufman	46	147	226	8	→ stable	Ozone
Kleberg	43	121	204	4	→ stable	PM2.5
Lubbock	23	91	330	0	↓ improving	PM2.5
Maverick	37	100	233	0	→ stable	PM2.5
McLennan	53	133	126	5	↑ worsening	PM2.5
Montgomery	55	166	111	21	→ stable	PM2.5
Navarro	48	129	205	8	→ stable	Ozone
Nueces	51	153	178	16	→ stable	PM2.5
Orange	44	119	238	3	→ stable	PM2.5
Parker	36	156	299	6	→ stable	Ozone
Polk	33	93	338	0	→ stable	Ozone
Potter	29	138	294	1	→ stable	PM2.5
Randall	43	108	283	2	→ stable	Ozone
Rockwall	34	126	315	2	→ stable	Ozone
Smith	39	105	314	1	→ stable	Ozone
Tarrant	54	203	130	31	→ stable	PM2.5
Travis	52	141	156	7	→ stable	PM2.5
Victoria	35	105	324	2	→ stable	Ozone
Webb	45	129	211	15	→ stable	Ozone
Wilson	7	34	190	0	↑ worsening	Ozone