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	  8	  7	134	 39.0	(91)	 66.0	(91)	 52.0	(92)	 46.0	(92)	 50.0	49.74	±22.35	
Atlanta,GA	 520	366	  0	  5	 58	 18.0	(91)	 23.0	(91)	 24.0	(92)	 18.0	(92)	 21.0	22.19	±10.24	
Augusta-Aiken,GA	 600	 61	  0	  4	 56	 17.0	(15)	 22.0	(15)	 20.0	(16)	 23.0	(15)	 19.0	21.61	±9.81	
Austin-San Marcos,TX	 640	 58	  0	  6	 47	 14.0	(15)	 16.5	(14)	 20.0	(14)	 12.0	(15)	 15.0	16.95	±8.00	
Baltimore,MD	 720	362	  0	  4	 56	 19.0	(88)	 24.0	(91)	 21.0	(92)	 19.0	(91)	 20.0	22.45	±10.84	
Baton Rouge,LA	 760	 60	  0	  9	 61	 26.0	(15)	 30.0	(15)	 25.5	(16)	 26.5	(14)	 26.0	28.30	±11.46	
Bergen-Passaic,NJ	 875	 39	  0	  8	 54	 24.0	(13)	 33.0	(11)	 25.0	(15)	   . 	(.)	 29.0	28.79	±11.87	
Biloxi-Gulfport-Pascagoula,MS	 920	 50	  0	  6	 51	 15.5	(14)	 20.0	(12)	 15.5	(14)	 14.5	(10)	 15.0	18.38	±9.08	
Birmingham,AL	1000	364	  3	  9	132	 38.0	(91)	 45.0	(91)	 54.0	(90)	 37.5	(92)	 44.0	45.18	±20.89	
Boise City,ID	1080	354	  0	  6	 60	 23.5	(90)	 20.0	(91)	 27.0	(91)	 20.5	(82)	 23.0	25.18	±12.44	
Casper,WY	1350	 94	  0	  2	 53	 11.5	(14)	 14.0	(23)	 19.0	(27)	 10.5	(30)	 14.0	15.24	±8.39	
Charleston-North Charleston,SC	1440	336	  0	  5	 50	 17.0	(82)	 19.0	(78)	 19.0	(84)	 16.5	(92)	 19.0	18.29	±6.74	
Charleston,WV	1480	363	  0	  4	 46	 14.0	(91)	 21.5	(90)	 26.0	(90)	 17.0	(92)	 19.0	20.23	±9.26	
Charlotte-Gastonia-Rock Hill,NC-SC	1520	 63	  0	  7	 52	 21.0	(17)	 28.0	(15)	 27.5	(16)	 24.0	(15)	 25.0	26.14	±10.93	
Cheyenne,WY	1580	109	  0	  2	 36	  8.5	(26)	 15.0	(30)	 14.0	(26)	  9.0	(27)	 11.0	12.07	±6.38	
Chicago,IL	1600	366	  0	  5	 70	 25.0	(91)	 31.0	(91)	 36.0	(92)	 27.5	(92)	 30.0	31.39	±14.88	
Cincinnati,OH-KY-IN	1640	352	  0	  2	 60	 14.0	(89)	 19.5	(86)	 20.0	(90)	 14.0	(87)	 16.0	18.14	±9.21	
Cleveland-Lorain-Elyria,OH	1680	366	  0	  8	 72	 28.0	(91)	 29.0	(91)	 34.0	(92)	 29.0	(92)	 30.0	32.22	±14.08	
Columbia,SC	1760	366	  1	  4	112	 35.0	(91)	 33.0	(91)	 37.0	(92)	 38.0	(92)	 35.0	36.01	±17.26	
Columbus,OH	1840	250	  0	  5	 66	 18.5	(88)	 19.5	(24)	 30.0	(51)	 21.0	(87)	 20.5	23.44	±12.70	
Dallas,TX	1920	 60	  0	 10	 72	 28.0	(15)	 26.0	(15)	 24.0	(15)	 19.0	(15)	 25.0	28.17	±12.78	
Denver,CO	2080	366	  0	  8	 75	 31.0	(91)	 30.0	(91)	 32.0	(92)	 31.0	(92)	 31.0	33.20	±14.08	
Des Moines,IA	2120	319	  0	  5	 61	 16.0	(82)	 20.0	(75)	 23.0	(77)	 17.0	(85)	 18.0	20.57	±10.42	
Detroit,MI	2160	359	  2	  3	144	 30.0	(91)	 28.0	(87)	 31.0	(89)	 27.5	(92)	 30.0	32.82	±18.57	
Fargo-Moorhead,ND-MN	2520	238	  0	  2	 54	 12.0	(30)	 14.0	(31)	 16.0	(85)	 14.0	(92)	 14.0	16.79	±10.30	
Fort Wayne,IN	2760	 61	  0	  6	 64	 22.0	(15)	 27.0	(15)	 27.5	(16)	 29.0	(15)	 25.0	27.21	±14.47	
Fort Worth-Arlington,TX	2800	 60	  0	  7	 49	 16.0	(15)	 17.0	(15)	 21.0	(15)	 12.0	(15)	 16.0	17.72	±7.73	
Gary,IN	2960	366	  5	  6	174	 21.0	(91)	 29.0	(91)	 28.5	(92)	 20.5	(92)	 25.0	29.92	±19.97	
Grand Rapids-Muskegon-Holland,MI	3000	 61	  0	  6	 39	 12.0	(15)	 14.0	(15)	 20.5	(16)	 15.0	(15)	 16.0	16.84	±7.72	
Greensboro-Winston Salem-High Point,NC	3120	366	  0	  5	 54	 19.0	(91)	 25.0	(91)	 25.5	(92)	 19.0	(92)	 21.5	21.88	±9.00	
Greenville-Spartanburg-Anderson,SC	3160	359	  0	  1	 52	 16.0	(91)	 23.0	(87)	 23.0	(90)	 19.0	(91)	 20.0	20.33	±8.56	
Houston,TX	3360	129	  0	  7	 75	 26.0	(31)	 38.0	(34)	 33.0	(33)	 28.0	(31)	 31.0	34.12	±15.77	
Huntington-Ashland,WV-KY-OH	3400	 61	  0	  6	 70	 21.0	(15)	 28.0	(15)	 30.5	(16)	 26.0	(15)	 26.0	28.75	±12.36	
Indianapolis,IN	3480	 63	  0	  4	 72	 19.0	(15)	 31.0	(17)	 31.0	(16)	 19.0	(15)	 23.0	27.30	±13.73	
Jersey City,NJ	3640	 59	  0	  8	 57	 23.0	(15)	 24.0	(15)	 22.0	(15)	 22.0	(14)	 23.0	25.31	±10.53	
Kansas City,MO-KS	3760	122	  0	  4	 50	 19.0	(31)	 23.0	(30)	 24.5	(30)	 19.0	(31)	 21.0	22.40	±10.35	
Knoxville,TN	3840	361	  2	  6	131	 31.0	(91)	 39.0	(90)	 31.0	(92)	 30.0	(88)	 32.0	36.46	±18.52	
Las Cruces,NM	4100	366	 22	  6	501	 50.0	(91)	 57.0	(91)	 36.0	(92)	 37.0	(92)	 46.5	51.43	±40.37	
Las Vegas,NV-AZ	4120	366	  5	 12	165	 45.0	(91)	 45.0	(91)	 49.0	(92)	 39.5	(92)	 45.0	46.37	±18.84	
Little Rock-North Little Rock,AR	4400	 62	  0	  6	 49	 26.0	(15)	 23.0	(15)	 24.5	(16)	 16.5	(16)	 21.5	23.85	±9.68	
Los Angeles-Long Beach,CA	4480	356	  0	  3	 65	 21.0	(83)	 29.0	(91)	 29.0	(92)	 18.5	(90)	 26.0	26.31	±12.66	
Louisville,KY-IN	4520	366	  0	  6	 71	 18.0	(91)	 27.0	(91)	 29.0	(92)	 18.0	(92)	 22.0	23.96	±11.18	
Memphis,TN-AR-MS	4920	 60	  0	  9	 46	 24.0	(15)	 23.5	(16)	 30.0	(15)	 18.5	(14)	 23.5	24.18	±7.61	
Miami,FL	5000	 58	  0	  8	 54	 25.0	(15)	 23.0	(15)	 22.0	(13)	 20.0	(15)	 22.5	24.34	±8.21	
Milwaukee-Waukesha,WI	5080	290	  0	 -6	 64	 29.0	(15)	 16.0	(91)	 21.5	(92)	 15.0	(92)	 17.0	20.48	±14.25	
Minneapolis-St. Paul,MN-WI	5120	362	  0	  3	 76	 22.0	(91)	 20.0	(91)	 24.0	(92)	 17.0	(88)	 20.0	23.32	±12.19	
Nashville,TN	5360	 61	  0	  4	 44	 23.0	(15)	 23.0	(15)	 26.5	(16)	 19.0	(15)	 22.0	24.00	±9.26	
Nassau-Suffolk,NY	5380	 58	  0	  2	 43	 11.0	(15)	 17.0	(14)	 11.5	(16)	 11.0	(13)	 12.0	13.69	±7.66	
New Orleans,LA	5560	 61	  0	 12	 65	 23.0	(15)	 19.0	(15)	 23.5	(16)	 19.0	(15)	 22.0	23.93	±9.43	
New York,NY	5600	 61	  0	  7	 45	 13.0	(15)	 16.0	(15)	 17.0	(16)	 19.0	(15)	 17.0	18.67	±8.68	
Norfolk-Virginia Beach-Newport News,VA_NC	5720	 61	  0	  8	 34	 12.0	(15)	 16.0	(15)	 17.0	(16)	 18.0	(15)	 16.0	17.36	±6.68	
Oklahoma City,OK	5880	 62	  0	  4	 49	 19.0	(16)	 23.0	(15)	 26.5	(16)	 15.0	(15)	 20.5	21.98	±9.39	
Omaha,NE-IA	5920	366	  1	  3	108	 22.0	(91)	 35.0	(91)	 35.0	(92)	 31.0	(92)	 31.0	34.41	±17.23	
Orlando,FL	5960	283	  0	  6	 52	 19.0	(90)	 18.0	(91)	 16.5	(50)	 15.0	(52)	 17.0	18.05	±6.25	
Philadelphia,PA-NJ	6160	365	  0	  6	 55	 19.0	(90)	 26.0	(91)	 24.0	(92)	 19.0	(92)	 21.0	22.88	±10.17	
Phoenix-Mesa,AZ	6200	348	  3	  7	386	 33.0	(87)	 39.0	(85)	 35.0	(84)	 56.0	(92)	 39.0	44.08	±27.02	
Pittsburgh,PA	6280	366	  1	  6	104	 24.0	(91)	 35.0	(91)	 46.0	(92)	 31.0	(92)	 33.0	37.36	±19.89	
Portland-Vancouver,OR-WA	6440	 71	  0	  6	 80	 26.0	(15)	 17.0	(15)	 21.0	(17)	 25.0	(24)	 21.0	22.89	±12.02	
Provo-Orem,UT	6520	363	  1	  2	103	 29.0	(91)	 19.0	(89)	 25.0	(91)	 21.5	(92)	 23.0	26.20	±15.64	
Raleigh-Durham-Chapel Hill,NC	6640	266	  0	  4	 46	 15.5	(16)	 22.0	(69)	 20.0	(89)	 17.0	(92)	 19.0	19.12	±7.76	
Rapid City,SD	6660	366	  1	  6	102	 34.0	(91)	 38.0	(91)	 34.0	(92)	 29.5	(92)	 34.0	36.24	±18.07	
Reno,NV	6720	 66	  0	 10	 86	 36.0	(15)	 31.0	(15)	 40.0	(16)	 34.0	(20)	 33.0	36.30	±16.16	
Richmond-Petersburg,VA	6760	 30	  0	  9	 30	 13.0	(15)	 13.0	(15)	   . 	(.)	   . 	(.)	 13.0	15.30	±6.17	
St, Louis,MO-IL	7040	366	 12	  6	141	 37.0	(91)	 50.0	(91)	 51.0	(92)	 36.5	(92)	 44.0	46.74	±23.59	
Salt Lake City-Ogden,UT	7160	366	  1	  7	118	 46.0	(91)	 31.0	(91)	 36.5	(92)	 37.5	(92)	 38.0	38.34	±18.41	
San Antonio,TX	7240	352	  0	  4	 76	 17.0	(91)	 19.0	(90)	 24.0	(91)	 17.0	(80)	 19.0	20.73	±10.02	
Santa Fe,NM	7490	 61	  0	  4	 25	  6.0	(15)	 12.0	(15)	  9.0	(16)	  8.0	(15)	  9.0	 9.82	±4.10	
Seattle-Bellevue-Everett,WA	7600	184	  0	  6	 52	   . 	(.)	   . 	(.)	 20.5	(92)	 26.0	(92)	 23.0	23.43	±8.24	
Shreveport-Bossier City,LA	7680	 59	  0	  8	 52	 14.0	(15)	 18.0	(15)	 19.0	(15)	 15.0	(14)	 17.0	18.68	±8.05	
Sioux Falls,SD	7760	364	  0	  4	 51	 12.0	(91)	 15.0	(89)	 17.5	(92)	 13.0	(92)	 14.0	16.46	±8.32	
Spokane,WA	7840	361	  0	  2	 92	 20.0	(91)	 19.0	(88)	 27.0	(90)	 21.0	(92)	 22.0	24.55	±14.11	
Tampa-St. Petersburg-Clearwater,FL	8280	365	  0	  9	 90	 30.0	(91)	 30.0	(91)	 25.0	(91)	 28.5	(92)	 29.0	29.45	±9.55	
Topeka,KS	8440	 61	  0	  6	 40	 14.0	(15)	 19.0	(15)	 24.0	(16)	 17.0	(15)	 18.0	19.66	±7.73	
Tucson,AZ	8520	366	  0	  5	 98	 27.0	(91)	 31.0	(91)	 23.0	(92)	 26.5	(92)	 28.0	28.59	±11.86	
Tulsa,OK	8560	 61	  0	  8	 88	 24.0	(15)	 22.0	(15)	 24.0	(16)	 16.0	(15)	 21.0	26.26	±16.07	
Washington,DC-MD-VA-WV	8840	 63	  0	  9	 53	 24.0	(15)	 28.0	(15)	 25.0	(17)	 24.0	(16)	 25.0	28.03	±11.11	
Wichita,KS	9040	366	  0	  5	 54	 17.0	(91)	 23.0	(91)	 27.0	(92)	 18.0	(92)	 21.0	21.82	±9.00	
Wilmington-Newark,DE-MD	9160	366	  0	  5	 58	 15.0	(91)	 19.0	(91)	 19.0	(92)	 16.0	(92)	 17.0	18.31	±8.12