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	365	 13	  7	212	 56.0	(90)	 57.0	(91)	 43.0	(92)	 55.0	(92)	 53.0	54.85	±23.58	
Atlanta,GA	 520	357	  0	  5	 55	 15.0	(90)	 26.0	(88)	 28.0	(87)	 19.0	(92)	 21.0	22.70	±10.65	
Atlantic-Cape May,NJ	 560	 51	  0	  8	 53	 17.0	(15)	 15.0	(13)	 22.0	(11)	 14.5	(12)	 16.0	18.25	±8.28	
Augusta-Aiken,GA	 600	 60	  0	  5	 50	 17.0	(15)	 28.0	(15)	 31.0	(15)	 19.0	(15)	 22.0	24.32	±9.99	
Austin-San Marcos,TX	 640	 57	  0	  6	 45	 14.0	(15)	 15.5	(12)	 19.0	(15)	 15.0	(15)	 15.0	16.77	±6.52	
Baltimore,MD	 720	 62	  0	  6	 56	 28.0	(15)	 21.0	(16)	 27.0	(15)	 21.5	(16)	 24.0	25.58	±10.74	
Baton Rouge,LA	 760	 60	  0	 16	 66	 24.0	(15)	 41.0	(14)	 40.0	(15)	 37.5	(16)	 31.0	35.43	±13.35	
Bergen-Passaic,NJ	 875	 48	  0	 10	 66	 39.0	(13)	 28.0	(14)	 29.0	(7)	 22.0	(14)	 28.5	30.40	±13.75	
Biloxi-Gulfport-Pascagoula,MS	 920	 38	  0	  7	 58	   . 	(.)	 22.5	(10)	 19.0	(14)	 19.0	(14)	 19.5	20.84	±9.03	
Birmingham,AL	1000	365	  3	 14	109	 52.0	(90)	 53.0	(91)	 49.0	(92)	 43.5	(92)	 49.0	48.92	±20.17	
Bismarck,ND	1010	365	  0	  3	 51	  8.0	(90)	 13.0	(91)	 16.5	(92)	 10.0	(92)	 12.0	13.34	±7.41	
Boise City,ID	1080	339	  0	  6	 76	 18.0	(90)	 20.0	(67)	 35.0	(92)	 19.0	(90)	 22.0	24.67	±12.95	
Casper,WY	1350	 88	  0	  2	 66	   . 	(.)	 17.5	(30)	 23.0	(30)	 11.0	(28)	 17.0	19.11	±12.52	
Charleston-North Charleston,SC	1440	354	  0	  4	 35	 17.5	(84)	 20.0	(91)	 19.0	(91)	 16.0	(88)	 18.0	18.39	±6.26	
Charleston,WV	1480	363	  0	  4	 77	 14.0	(90)	 20.0	(91)	 26.5	(92)	 16.0	(90)	 19.0	20.58	±10.22	
Charlotte-Gastonia-Rock Hill,NC-SC	1520	 61	  0	  7	 58	 28.0	(15)	 37.0	(15)	 30.0	(15)	 23.0	(16)	 30.0	29.74	±11.97	
Cheyenne,WY	1580	115	  0	  2	 39	  6.5	(28)	 14.0	(31)	 16.0	(26)	  8.5	(30)	 12.0	12.28	±6.95	
Chicago,IL	1600	365	  0	  6	 65	 23.5	(90)	 31.0	(91)	 35.0	(92)	 26.5	(92)	 29.0	30.00	±13.61	
Cincinnati,OH-KY-IN	1640	271	  0	  4	 52	 13.5	(90)	 19.0	(71)	 28.0	(92)	 17.5	(18)	 19.0	21.01	±10.37	
Cleveland-Lorain-Elyria,OH	1680	365	  0	  2	 74	 23.0	(90)	 28.0	(91)	 28.0	(92)	 26.5	(92)	 26.0	28.19	±13.24	
Colorado Springs,CO	1720	121	  0	  6	 74	 22.0	(30)	 19.0	(29)	 16.0	(31)	 21.0	(31)	 19.0	21.44	±10.48	
Columbia,SC	1760	365	  0	  5	 83	 32.0	(90)	 39.0	(91)	 38.0	(92)	 30.0	(92)	 35.0	36.35	±17.18	
Dallas,TX	1920	 61	  0	  6	 59	 26.0	(15)	 29.0	(15)	 31.0	(15)	 20.5	(16)	 27.0	27.15	±10.29	
Dayton-Springfield,OH	2000	 61	  0	  6	 42	 19.0	(15)	 21.0	(15)	 25.0	(15)	 17.5	(16)	 19.0	20.56	±9.26	
Daytona Beach,FL	2020	350	  0	  4	 61	 20.0	(83)	 20.0	(90)	 16.0	(91)	 17.0	(86)	 19.0	19.92	±8.81	
Denver,CO	2080	365	  0	  6	 81	 36.5	(90)	 32.0	(91)	 28.0	(92)	 29.0	(92)	 31.0	32.53	±13.45	
Des Moines,IA	2120	 61	  0	  6	 55	 16.0	(15)	 26.0	(15)	 24.0	(15)	 20.5	(16)	 22.0	24.56	±11.65	
Detroit,MI	2160	357	  0	  5	 66	 22.0	(90)	 27.0	(91)	 27.5	(84)	 27.0	(92)	 26.0	28.07	±13.55	
El Paso,TX	2320	365	 31	  5	501	 52.5	(90)	 63.0	(91)	 38.5	(92)	 52.0	(92)	 52.0	57.70	±45.28	
Eugene-Springfield,OR	2400	131	  0	  2	 58	 13.0	(33)	 12.0	(34)	 21.0	(31)	 18.0	(33)	 17.0	19.30	±11.41	
Fargo-Moorhead,ND-MN	2520	363	  0	  0	 60	  7.0	(88)	 16.0	(91)	 19.0	(92)	 10.5	(92)	 12.0	14.69	±9.51	
Fort Lauderdale,FL	2680	362	  0	  6	 71	 20.0	(90)	 21.0	(91)	 18.0	(89)	 18.5	(92)	 19.0	21.67	±10.01	
Fort Worth-Arlington,TX	2800	 57	  0	  4	 39	 16.0	(15)	 19.0	(13)	 19.5	(14)	 13.0	(15)	 18.0	17.84	±6.89	
Gary,IN	2960	363	  1	  6	119	 20.5	(90)	 28.0	(91)	 24.5	(90)	 19.5	(92)	 23.0	25.77	±12.74	
Grand Rapids-Muskegon-Holland,MI	3000	 61	  0	  2	 42	 14.0	(15)	 14.0	(15)	 19.0	(15)	 20.5	(16)	 16.0	17.51	±8.45	
Great Falls,MT	3040	 26	  0	  2	  9	  2.0	(26)	   . 	(.)	   . 	(.)	   . 	(.)	  2.0	 3.04	±2.03	
Greensboro-Winston Salem-High Point,NC	3120	365	  0	  4	 49	 16.0	(90)	 22.0	(91)	 28.0	(92)	 17.0	(92)	 21.0	21.50	±9.24	
Greenville-Spartanburg-Anderson,SC	3160	347	  0	  3	 69	 17.0	(90)	 23.0	(73)	 28.0	(92)	 17.0	(92)	 20.0	21.61	±9.80	
Hickory-Morganton-Lenoir,NC	3290	 59	  0	  5	 51	 17.0	(15)	 20.0	(15)	 24.0	(15)	 15.0	(14)	 18.0	20.12	±9.80	
Honolulu,HI	3320	363	  0	  6	 67	 17.0	(90)	 16.0	(91)	 14.0	(92)	 16.0	(90)	 16.0	16.66	±6.99	
Huntington-Ashland,WV-KY-OH	3400	 63	  0	  8	 77	 23.0	(15)	 32.0	(16)	 33.0	(16)	 21.0	(16)	 28.0	29.75	±14.29	
Indianapolis,IN	3480	 63	  0	  7	 66	 21.0	(17)	 21.0	(15)	 29.0	(15)	 17.5	(16)	 21.0	25.63	±12.36	
Jacksonville,FL	3600	102	  0	  7	 50	 17.0	(53)	 28.0	(15)	 20.5	(18)	 20.5	(16)	 19.5	21.01	±8.31	
Jersey City,NJ	3640	 53	  0	  7	 50	 27.0	(15)	 17.0	(15)	 24.0	(7)	 17.0	(16)	 20.0	23.02	±11.41	
Kansas City,MO-KS	3760	 63	  0	 12	 69	 31.0	(15)	 39.0	(15)	 32.0	(16)	 44.0	(17)	 34.0	36.92	±14.55	
Las Cruces,NM	4100	365	 20	  6	397	 55.0	(90)	 56.0	(91)	 31.0	(92)	 47.0	(92)	 47.0	52.64	±39.64	
Las Vegas,NV-AZ	4120	365	  4	  7	455	 36.5	(90)	 37.0	(91)	 42.0	(92)	 46.0	(92)	 40.0	42.38	±27.63	
Little Rock-North Little Rock,AR	4400	 61	  0	  9	 39	 17.0	(15)	 29.0	(15)	 23.0	(15)	 20.5	(16)	 21.0	22.34	±7.77	
Los Angeles-Long Beach,CA	4480	365	  0	  3	 82	 15.5	(90)	 25.0	(91)	 29.0	(92)	 24.0	(92)	 24.0	25.16	±13.32	
Louisville,KY-IN	4520	365	  0	  6	 57	 16.0	(90)	 25.0	(91)	 31.0	(92)	 19.0	(92)	 21.0	23.24	±10.18	
Memphis,TN-AR-MS	4920	 61	  0	  6	 64	 17.0	(15)	 32.0	(15)	 23.0	(15)	 19.0	(16)	 21.0	24.20	±12.23	
Miami,FL	5000	 61	  0	 10	 49	 27.0	(15)	 26.0	(15)	 19.0	(15)	 24.0	(16)	 24.0	24.34	±7.58	
Milwaukee-Waukesha,WI	5080	365	  0	  1	 57	 14.0	(90)	 18.0	(91)	 21.5	(92)	 18.0	(92)	 18.0	19.24	±10.15	
Minneapolis-St. Paul,MN-WI	5120	287	  0	  5	 61	 19.0	(90)	 20.0	(87)	 27.0	(41)	 18.0	(69)	 20.0	22.11	±10.23	
Missoula,MT	5140	355	  0	  4	 66	 21.0	(86)	 16.0	(89)	 27.5	(88)	 19.0	(92)	 21.0	23.19	±12.75	
Nashville,TN	5360	 61	  0	  6	 53	 17.0	(15)	 31.0	(15)	 27.0	(15)	 18.0	(16)	 22.0	23.44	±10.34	
New Orleans,LA	5560	 34	  0	 15	 70	   . 	(.)	 47.0	(5)	 30.0	(14)	 51.0	(15)	 35.0	39.94	±16.07	
Norfolk-Virginia Beach-Newport News,VA_NC	5720	 61	  0	  6	 44	 16.0	(15)	 21.0	(15)	 22.0	(15)	 17.0	(16)	 19.0	19.36	±7.36	
Oklahoma City,OK	5880	 61	  0	  5	 67	 19.0	(15)	 29.0	(15)	 20.0	(15)	 19.0	(16)	 20.0	22.52	±10.60	
Olympia,WA	5910	 20	  0	  4	 38	  8.0	(15)	 11.0	(5)	   . 	(.)	   . 	(.)	  9.5	10.40	±7.29	
Omaha,NE-IA	5920	364	  0	  6	 94	 28.0	(90)	 33.0	(91)	 34.0	(92)	 29.0	(91)	 31.0	34.65	±18.54	
Orlando,FL	5960	365	  0	  7	 59	 19.0	(90)	 20.0	(91)	 18.0	(92)	 17.0	(92)	 19.0	19.65	±7.71	
Philadelphia,PA-NJ	6160	365	  2	  6	104	 15.0	(90)	 21.0	(91)	 23.0	(92)	 19.0	(92)	 20.0	22.90	±14.13	
Phoenix-Mesa,AZ	6200	365	220	 12	501	107.0	(90)	145.0	(91)	 90.5	(92)	148.5	(92)	118.0	139.7	±95.07	
Pittsburgh,PA	6280	365	  0	  4	 88	 24.0	(90)	 31.0	(91)	 37.0	(92)	 29.5	(92)	 30.0	33.85	±18.01	
Portland-Vancouver,OR-WA	6440	 61	  0	  5	 49	 17.0	(15)	 14.0	(15)	 18.0	(15)	 20.5	(16)	 17.0	19.10	±9.27	
Provo-Orem,UT	6520	355	  0	  2	 85	 15.0	(87)	 20.0	(88)	 29.0	(89)	 18.0	(91)	 20.0	22.84	±13.65	
Raleigh-Durham-Chapel Hill,NC	6640	311	  0	  3	 40	 14.0	(90)	 20.0	(89)	 19.5	(40)	 15.0	(92)	 17.0	17.47	±7.58	
Rapid City,SD	6660	365	  1	  6	108	 25.0	(90)	 26.0	(91)	 31.0	(92)	 32.0	(92)	 28.0	32.56	±17.06	
Reno,NV	6720	 74	  0	  8	 82	 36.0	(27)	 26.0	(15)	 38.0	(15)	 44.0	(17)	 36.5	39.03	±18.94	
Richland-Kennewick-Pasco,Wa	6740	341	  3	  2	149	  8.0	(79)	 14.0	(87)	 31.0	(84)	 13.0	(91)	 15.0	19.52	±16.45	
Richmond-Petersburg,VA	6760	 11	  0	  6	 26	   . 	(.)	   . 	(.)	   . 	(.)	 12.0	(11)	 12.0	14.18	±5.83	
Riverside-San Bernardino,CA	6780	365	  4	  6	180	 28.5	(90)	 35.0	(91)	 42.0	(92)	 38.0	(92)	 35.0	39.92	±20.90	
St, Louis,MO-IL	7040	364	 24	 10	183	 53.0	(90)	 60.0	(91)	 52.0	(91)	 38.0	(92)	 52.0	54.38	±28.34	
Salt Lake City-Ogden,UT	7160	365	  2	  5	117	 26.5	(90)	 32.0	(91)	 44.0	(92)	 31.0	(92)	 33.0	35.93	±18.36	
San Diego,CA	7320	 74	  0	 12	 90	 52.5	(18)	 34.5	(18)	 38.0	(17)	 48.0	(21)	 42.0	41.65	±19.06	
Santa Fe,NM	7490	 63	  0	  5	 32	 13.0	(15)	 15.0	(17)	 12.0	(15)	 16.0	(16)	 13.0	13.75	±5.24	
Scranton-Wilkes Barre-Hazleton,PA	7560	364	  0	  5	 55	 15.0	(90)	 16.0	(90)	 19.0	(92)	 15.5	(92)	 16.0	17.82	±9.35	
Seattle-Bellevue-Everett,WA	7600	365	  0	  6	 63	 19.0	(90)	 19.0	(91)	 19.0	(92)	 19.0	(92)	 19.0	20.81	±8.97	
Shreveport-Bossier City,LA	7680	 60	  0	  8	 61	 16.5	(14)	 23.0	(15)	 23.0	(15)	 17.0	(16)	 19.5	22.05	±9.76	
Sioux Falls,SD	7760	317	  0	  3	 73	 13.0	(90)	 17.5	(84)	 19.0	(51)	 16.0	(92)	 16.0	17.98	±10.20	
Spokane,WA	7840	352	  0	  4	 74	 18.5	(90)	 20.0	(86)	 30.0	(91)	 19.0	(85)	 21.0	24.07	±13.87	
Tacoma,WA	8200	356	  0	  4	 53	 11.0	(90)	 14.0	(91)	 19.5	(88)	 14.0	(87)	 15.0	16.71	±9.18	
Tampa-St. Petersburg-Clearwater,FL	8280	365	  0	 10	 88	 31.0	(90)	 33.0	(91)	 30.0	(92)	 27.0	(92)	 31.0	32.64	±12.08	
Toledo,OH	8400	327	  0	  3	 58	 13.0	(90)	 15.0	(72)	 21.0	(73)	 17.5	(92)	 17.0	20.06	±12.02	
Topeka,KS	8440	 56	  0	  7	 51	 20.0	(15)	 23.0	(15)	 19.0	(13)	 21.0	(13)	 19.5	22.02	±8.85	
Trenton,NJ	8480	 47	  0	  2	 58	 20.5	(12)	 23.0	(10)	 19.0	(9)	 15.0	(16)	 18.0	19.72	±11.12	
Tucson,AZ	8520	365	  0	  6	 95	 40.5	(90)	 34.0	(91)	 21.0	(92)	 34.0	(92)	 32.0	33.67	±14.22	
Tulsa,OK	8560	 61	  1	  6	101	 18.0	(15)	 42.0	(15)	 26.0	(15)	 15.5	(16)	 23.0	27.13	±17.08	
Washington,DC-MD-VA-WV	8840	 62	  0	 10	 65	 31.0	(15)	 27.0	(15)	 31.0	(16)	 21.0	(16)	 25.0	29.15	±13.43	
West Palm Beach-Boca Raton,FL	8960	 61	  0	  9	 50	 23.0	(15)	 26.0	(15)	 16.0	(15)	 21.5	(16)	 22.0	24.15	±9.57	
Wichita,KS	9040	365	  0	  5	 68	 22.5	(90)	 25.0	(91)	 25.0	(92)	 19.0	(92)	 23.0	24.33	±10.38	
Wilmington-Newark,DE-MD	9160	348	  0	  2	 64	 17.5	(90)	 20.0	(89)	 22.0	(92)	 15.0	(77)	 19.0	20.91	±11.24	
Yakima,WA	9260	 60	  0	  5	 66	 17.0	(15)	 17.0	(15)	 28.0	(15)	 26.0	(15)	 22.0	25.68	±14.05	
Youngstown-Warren,OH	9320	 61	  0	  9	 64	 29.0	(15)	 28.0	(15)	 30.0	(15)	 23.0	(16)	 28.0	28.56	±11.97	
Yuma,AZ	9360	365	  7	  7	146	 42.5	(90)	 42.0	(91)	 41.0	(92)	 45.5	(92)	 43.0	44.59	±18.58