Quarterly Median		
	Days with	Range	Q1	Q2	Q3	Q4	Annual	Annual	
MSA Name	MSA Code	N	AQI >100	Min	Max	Median	(n)	Median	(n)	Median	(n)	Median	(n)	Median	Mean	±SD	
Albuquerque,NM	 200	366	  0	 21	 82	 37.0	(91)	 48.0	(91)	 48.0	(92)	 31.0	(92)	 40.5	41.16	±10.64	
Atlanta,GA	 520	246	 11	 19	169	 41.0	(32)	 44.0	(91)	 48.0	(92)	 30.0	(31)	 42.5	49.00	±23.09	
Augusta-Aiken,GA	 600	366	  3	  9	111	 27.0	(91)	 42.0	(91)	 38.0	(92)	 25.0	(92)	 31.0	34.89	±16.53	
Austin-San Marcos,TX	 640	366	  2	 11	119	 27.0	(91)	 32.0	(91)	 44.0	(92)	 26.0	(92)	 30.0	33.08	±15.32	
Baltimore,MD	 720	215	 10	  5	156	  5.0	(1)	 45.0	(91)	 45.0	(92)	 23.0	(31)	 43.0	47.54	±25.30	
Baton Rouge,LA	 760	366	 11	 13	164	 31.0	(91)	 38.0	(91)	 41.5	(92)	 28.0	(92)	 34.0	39.76	±21.51	
Bergen-Passaic,NJ	 875	363	  3	  2	127	 23.0	(88)	 38.0	(91)	 32.0	(92)	 18.5	(92)	 27.0	29.67	±17.25	
Biloxi-Gulfport-Pascagoula,MS	 920	241	  3	 20	116	 41.0	(32)	 36.0	(91)	 39.0	(87)	 38.0	(31)	 38.0	42.11	±16.34	
Birmingham,AL	1000	366	  4	  2	132	 18.0	(91)	 40.0	(91)	 41.0	(92)	 20.0	(92)	 31.0	33.49	±18.78	
Boise City,ID	1080	215	  0	 16	 79	 33.0	(1)	 42.0	(91)	 39.0	(92)	 28.0	(31)	 41.0	40.15	±10.58	
Charleston-North Charleston,SC	1440	365	  1	 13	104	 33.0	(90)	 37.0	(91)	 30.0	(92)	 27.0	(92)	 31.0	33.31	±11.38	
Charleston,WV	1480	214	  0	  6	100	   . 	(.)	 37.0	(91)	 35.0	(92)	 20.0	(31)	 34.0	33.99	±12.45	
Charlotte-Gastonia-Rock Hill,NC-SC	1520	238	  5	 12	156	 38.0	(23)	 44.0	(91)	 44.0	(92)	 30.0	(32)	 42.0	46.09	±21.63	
Chicago,IL	1600	366	  1	  5	109	 25.0	(91)	 38.0	(91)	 40.0	(92)	 20.0	(92)	 30.0	31.83	±14.11	
Cincinnati,OH-KY-IN	1640	246	  3	  5	106	 31.5	(32)	 43.0	(91)	 42.0	(92)	 27.0	(31)	 39.5	41.98	±17.93	
Cleveland-Lorain-Elyria,OH	1680	215	  5	  9	109	 20.0	(1)	 41.0	(91)	 41.0	(92)	 27.0	(31)	 39.0	42.74	±18.82	
Columbia,SC	1760	366	  4	 13	135	 30.0	(91)	 47.0	(91)	 38.5	(92)	 26.5	(92)	 34.0	37.70	±17.41	
Columbus,OH	1840	215	  1	  5	104	 19.0	(1)	 41.0	(91)	 41.0	(92)	 27.0	(31)	 40.0	42.34	±16.52	
Dallas,TX	1920	366	 20	  9	159	 30.0	(91)	 38.0	(91)	 50.5	(92)	 26.0	(92)	 34.0	41.81	±25.68	
Denver,CO	2080	366	  0	 10	 92	 34.0	(91)	 45.0	(91)	 45.0	(92)	 31.0	(92)	 38.0	39.28	±12.82	
Des Moines,IA	2120	215	  0	  6	 50	  8.0	(1)	 31.0	(91)	 28.0	(92)	 20.0	(31)	 29.0	28.71	±7.94	
Detroit,MI	2160	184	  0	 14	 97	 28.0	(1)	 35.0	(91)	 37.0	(92)	   . 	(.)	 35.5	38.33	±14.17	
Dover,DE	2190	211	  0	  2	100	 11.0	(1)	 41.0	(91)	 35.5	(92)	 21.0	(27)	 37.0	37.02	±14.77	
Fargo-Moorhead,ND-MN	2520	366	  0	  5	 54	 30.0	(91)	 32.0	(91)	 27.0	(92)	 18.5	(92)	 27.0	26.87	±8.36	
Fort Wayne,IN	2760	184	  0	 13	100	 22.0	(1)	 38.0	(91)	 37.0	(92)	   . 	(.)	 38.0	37.93	±11.22	
Fort Worth-Arlington,TX	2800	366	 15	  2	159	 30.0	(91)	 39.0	(91)	 66.5	(92)	 27.0	(92)	 34.0	42.03	±25.43	
Gary,IN	2960	184	  0	 14	100	 29.0	(1)	 36.0	(91)	 38.0	(92)	   . 	(.)	 36.0	39.07	±12.66	
Grand Rapids-Muskegon-Holland,MI	3000	184	  1	 19	156	 20.0	(1)	 36.0	(91)	 39.0	(92)	   . 	(.)	 36.5	40.92	±16.72	
Greensboro-Winston Salem-High Point,NC	3120	217	  1	  6	101	 15.0	(1)	 42.0	(91)	 42.0	(92)	 30.0	(33)	 40.0	41.65	±16.58	
Greenville-Spartanburg-Anderson,SC	3160	366	  2	  5	109	 27.0	(91)	 43.0	(91)	 43.0	(92)	 23.0	(92)	 32.5	35.69	±17.32	
Houston,TX	3360	366	 37	 10	201	 32.0	(91)	 40.0	(91)	 56.0	(92)	 28.5	(92)	 35.0	46.99	±33.77	
Huntington-Ashland,WV-KY-OH	3400	246	  0	 10	 92	 33.5	(32)	 40.0	(91)	 39.0	(92)	 27.0	(31)	 37.0	37.08	±11.43	
Indianapolis,IN	3480	184	  1	 18	111	 18.0	(1)	 41.0	(91)	 42.0	(92)	   . 	(.)	 41.0	44.18	±13.88	
Jackson,MS	3560	246	  0	 14	 95	 40.5	(32)	 34.0	(91)	 34.0	(92)	 30.0	(31)	 35.0	35.07	±11.50	
Jersey City,NJ	3640	366	  1	  2	109	 18.0	(91)	 34.0	(91)	 29.0	(92)	 12.5	(92)	 23.0	24.52	±14.79	
Kansas City,MO-KS	3760	366	  0	  8	 90	 30.0	(91)	 40.0	(91)	 43.5	(92)	 22.0	(92)	 33.5	33.83	±13.09	
Knoxville,TN	3840	366	  3	 21	129	 39.0	(91)	 47.0	(91)	 48.0	(92)	 36.0	(92)	 42.0	45.37	±14.47	
Lafayette,LA	3880	366	  1	 10	116	 31.0	(91)	 31.0	(91)	 38.0	(92)	 27.0	(92)	 30.0	33.78	±15.06	
Las Cruces,NM	4100	366	  0	 14	 92	 34.0	(91)	 45.0	(91)	 46.0	(92)	 30.0	(92)	 38.0	39.53	±12.10	
Las Vegas,NV-AZ	4120	366	  3	 16	109	 36.0	(91)	 50.0	(91)	 48.0	(92)	 30.0	(92)	 42.0	44.51	±16.30	
Lincoln,NE	4360	215	  0	  6	 45	  6.0	(1)	 32.0	(91)	 27.0	(92)	 23.0	(31)	 28.0	28.36	±6.98	
Little Rock-North Little Rock,AR	4400	366	  1	  4	104	 30.0	(91)	 35.0	(91)	 40.0	(92)	 23.0	(92)	 31.0	32.72	±12.94	
Los Angeles-Long Beach,CA	4480	366	 65	 17	204	 34.0	(91)	 56.0	(91)	 95.0	(92)	 34.0	(92)	 46.0	61.20	±36.97	
Louisville,KY-IN	4520	246	  2	  4	145	 33.0	(32)	 42.0	(91)	 41.5	(92)	 26.0	(31)	 39.0	40.64	±16.22	
Memphis,TN-AR-MS	4920	366	  2	  3	122	 29.0	(91)	 39.0	(91)	 45.0	(92)	 21.0	(92)	 33.0	35.49	±17.31	
Miami,FL	5000	366	  1	 11	109	 34.0	(91)	 29.0	(91)	 21.0	(92)	 33.0	(92)	 30.0	30.26	±10.18	
Middlesex-Somerset-Hunterdon,NJ	5015	366	  6	  5	137	 27.0	(91)	 41.0	(91)	 37.5	(92)	 22.5	(92)	 30.0	33.77	±18.92	
Milwaukee-Waukesha,WI	5080	358	  2	  2	140	 20.0	(83)	 33.0	(91)	 36.0	(92)	 17.5	(92)	 27.0	28.35	±15.69	
Minneapolis-St. Paul,MN-WI	5120	366	  0	  2	 69	 25.0	(91)	 35.0	(91)	 34.5	(92)	 17.0	(92)	 27.0	28.10	±10.78	
Monmouth-Ocean,NJ	5190	223	  8	 13	145	 37.5	(6)	 44.0	(91)	 38.0	(92)	 23.0	(34)	 38.0	43.87	±23.14	
Nashville,TN	5360	246	  1	 13	109	 37.5	(32)	 41.0	(91)	 40.5	(92)	 30.0	(31)	 39.0	42.07	±14.37	
Nassau-Suffolk,NY	5380	366	  3	  4	114	 29.0	(91)	 38.0	(91)	 35.0	(92)	 23.0	(92)	 30.0	33.02	±15.16	
New Orleans,LA	5560	366	  3	 13	124	 30.0	(91)	 34.0	(91)	 38.5	(92)	 29.5	(92)	 33.0	35.42	±15.81	
New York,NY	5600	366	  3	  2	154	 21.0	(91)	 39.0	(91)	 34.0	(92)	 20.0	(92)	 27.0	31.35	±19.13	
Newark,NJ	5640	362	  0	  5	 92	 28.0	(88)	 38.0	(91)	 31.0	(92)	 21.0	(91)	 28.0	30.45	±12.57	
Norfolk-Virginia Beach-Newport News,VA_NC	5720	215	  1	 14	137	 21.0	(1)	 42.0	(91)	 38.0	(92)	 30.0	(31)	 38.0	38.99	±14.98	
Oklahoma City,OK	5880	366	  0	  7	 95	 28.0	(91)	 39.0	(91)	 45.0	(92)	 24.5	(92)	 34.0	35.10	±13.84	
Omaha,NE-IA	5920	215	  0	 12	 74	 16.0	(1)	 37.0	(91)	 34.0	(92)	 25.0	(31)	 34.0	35.10	±10.25	
Orlando,FL	5960	363	  2	  2	111	 33.0	(91)	 40.0	(91)	 34.0	(89)	 31.5	(92)	 34.0	35.95	±13.48	
Philadelphia,PA-NJ	6160	366	  9	  6	147	 29.0	(91)	 45.0	(91)	 45.0	(92)	 23.0	(92)	 32.0	38.42	±21.88	
Phoenix-Mesa,AZ	6200	366	  1	 23	106	 35.0	(91)	 51.0	(91)	 50.5	(92)	 31.0	(92)	 43.0	45.97	±16.29	
Pittsburgh,PA	6280	366	  1	  2	111	 24.0	(91)	 41.0	(91)	 44.0	(92)	 18.5	(92)	 30.0	33.63	±17.75	
Portland-Vancouver,OR-WA	6440	154	  0	 11	100	   . 	(.)	 28.0	(62)	 26.0	(92)	   . 	(.)	 27.0	29.87	±11.29	
Provo-Orem,UT	6520	154	  0	 26	 77	   . 	(.)	 44.0	(62)	 43.0	(92)	   . 	(.)	 43.5	43.90	±8.19	
Raleigh-Durham-Chapel Hill,NC	6640	276	  1	  2	101	 20.0	(1)	 43.0	(91)	 38.0	(92)	 22.0	(92)	 34.0	36.95	±18.27	
Rapid City,SD	6660	154	  0	 18	 51	   . 	(.)	 37.0	(62)	 38.0	(92)	   . 	(.)	 37.0	36.58	±6.68	
Reno,NV	6720	366	  0	 18	 85	 33.0	(91)	 43.0	(91)	 43.0	(92)	 29.5	(92)	 36.0	37.40	±9.65	
Richmond-Petersburg,VA	6760	215	  1	 16	116	 16.0	(1)	 42.0	(91)	 39.5	(92)	 27.0	(31)	 39.0	41.64	±16.96	
St, Louis,MO-IL	7040	366	  0	  6	 95	 25.0	(91)	 41.0	(91)	 42.5	(92)	 19.0	(92)	 31.0	34.12	±17.57	
Salt Lake City-Ogden,UT	7160	154	  0	 27	 82	   . 	(.)	 48.0	(62)	 45.0	(92)	   . 	(.)	 46.0	47.73	±11.81	
San Antonio,TX	7240	366	  7	 15	127	 30.0	(91)	 34.0	(91)	 45.0	(92)	 29.5	(92)	 32.0	36.47	±17.21	
Seattle-Bellevue-Everett,WA	7600	154	  1	  9	106	   . 	(.)	 30.5	(62)	 27.0	(92)	   . 	(.)	 28.0	32.01	±14.19	
Shreveport-Bossier City,LA	7680	366	  0	  7	 97	 30.0	(91)	 34.0	(91)	 38.5	(92)	 24.0	(92)	 30.0	32.48	±12.38	
Sioux Falls,SD	7760	104	  0	 13	 61	   . 	(.)	 31.0	(21)	 34.0	(82)	 27.0	(1)	 33.5	32.74	±8.74	
Spokane,WA	7840	154	  0	 20	 77	   . 	(.)	 37.0	(62)	 35.0	(92)	   . 	(.)	 36.0	37.14	±8.97	
Tacoma,WA	8200	366	  0	 13	 85	 34.0	(91)	 34.0	(91)	 30.0	(92)	 29.0	(92)	 32.0	32.43	±8.41	
Tampa-St. Petersburg-Clearwater,FL	8280	366	  0	 14	100	 37.0	(91)	 43.0	(91)	 34.0	(92)	 34.0	(92)	 37.0	39.07	±14.15	
Tucson,AZ	8520	366	  0	 21	 77	 37.0	(91)	 45.0	(91)	 43.0	(92)	 32.0	(92)	 38.0	39.70	±9.89	
Tulsa,OK	8560	366	  0	  6	 92	 29.0	(91)	 36.0	(91)	 45.0	(92)	 25.5	(92)	 33.0	34.73	±13.03	
Washington,DC-MD-VA-WV	8840	366	  8	  4	197	 26.0	(91)	 45.0	(91)	 45.0	(92)	 22.0	(92)	 32.0	37.33	±23.10	
Wichita,KS	9040	366	  0	  5	 79	 26.0	(91)	 36.0	(91)	 39.0	(92)	 19.0	(92)	 31.0	30.52	±11.50	
Wilmington-Newark,DE-MD	9160	362	  4	  2	135	 25.0	(87)	 42.0	(91)	 38.5	(92)	 20.0	(92)	 29.0	33.33	±18.44	
Wilmington,NC	9200	215	  0	 11	 82	 24.0	(1)	 38.0	(91)	 30.0	(92)	 30.0	(31)	 34.0	34.50	±11.67