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	362	  2	  6	153	 24.0	(89)	 33.0	(89)	 18.0	(92)	 23.0	(92)	 24.0	27.41	±16.16	
Atlanta,GA	 520	366	  7	  9	120	 51.0	(91)	 54.0	(91)	 59.0	(92)	 53.0	(92)	 54.0	53.70	±18.55	
Augusta-Aiken,GA	 600	123	  1	 14	105	 46.0	(31)	 51.5	(30)	 50.0	(31)	 44.0	(31)	 49.0	48.73	±18.32	
Baltimore,MD	 720	366	  8	 11	113	 51.0	(91)	 49.0	(91)	 54.0	(92)	 44.0	(92)	 49.5	50.37	±21.44	
Baton Rouge,LA	 760	364	  0	  8	 96	 36.5	(90)	 34.0	(91)	 52.5	(92)	 36.0	(91)	 38.0	41.01	±16.11	
Bergen-Passaic,NJ	 875	119	  1	 12	110	 31.0	(31)	 41.5	(28)	 42.0	(31)	 27.0	(29)	 35.0	38.88	±20.80	
Biloxi-Gulfport-Pascagoula,MS	 920	119	  1	 11	104	 33.0	(31)	 34.0	(29)	 48.0	(29)	 38.5	(30)	 38.0	39.93	±19.36	
Birmingham,AL	1000	366	 11	 14	126	 47.0	(91)	 52.0	(91)	 60.0	(92)	 47.5	(92)	 52.0	54.63	±21.75	
Boise City,ID	1080	122	  5	  6	117	 27.0	(31)	 14.0	(30)	 19.0	(31)	 37.5	(30)	 20.5	28.96	±23.97	
Charleston-North Charleston,SC	1440	364	  0	 10	 92	 37.0	(91)	 36.0	(91)	 39.0	(91)	 36.0	(91)	 37.0	39.86	±16.76	
Charleston,WV	1480	122	  0	 14	 94	 38.0	(31)	 50.0	(30)	 67.0	(31)	 45.0	(30)	 50.0	49.16	±18.82	
Charlotte-Gastonia-Rock Hill,NC-SC	1520	364	  2	  9	108	 44.0	(90)	 48.5	(90)	 53.0	(92)	 48.5	(92)	 50.0	48.55	±18.05	
Cheyenne,WY	1580	115	  0	  4	 73	  8.0	(30)	 14.0	(30)	 15.0	(28)	 14.0	(27)	 14.0	15.88	±11.02	
Chicago,IL	1600	355	  8	  8	128	 57.0	(89)	 41.5	(90)	 54.5	(86)	 49.5	(90)	 52.0	50.26	±20.34	
Cincinnati,OH-KY-IN	1640	353	  3	  9	115	 48.0	(81)	 48.0	(90)	 55.0	(92)	 44.5	(90)	 49.0	48.54	±18.35	
Cleveland-Lorain-Elyria,OH	1680	362	 13	  9	131	 48.5	(88)	 50.0	(91)	 58.0	(92)	 49.0	(91)	 52.0	52.22	±23.12	
Columbia,SC	1760	332	  1	 12	106	 40.0	(85)	 52.0	(73)	 46.0	(88)	 44.5	(86)	 44.0	45.32	±17.41	
Columbus,OH	1840	364	  1	  9	101	 44.0	(91)	 45.0	(91)	 53.0	(91)	 45.0	(91)	 46.0	46.83	±18.98	
Dallas,TX	1920	364	  0	  6	 94	 38.0	(91)	 37.0	(91)	 46.0	(92)	 29.5	(90)	 37.5	39.52	±16.06	
Denver,CO	2080	330	  0	  0	100	 32.0	(85)	 25.5	(80)	 29.0	(84)	 31.0	(81)	 29.5	31.41	±14.46	
Des Moines,IA	2120	347	  0	  6	 92	 38.0	(81)	 22.0	(87)	 27.0	(87)	 27.5	(92)	 28.0	31.60	±17.13	
Detroit,MI	2160	362	  4	  8	119	 52.0	(89)	 40.0	(91)	 52.0	(91)	 41.0	(91)	 44.0	47.51	±22.12	
Dover,DE	2190	126	  0	 11	 94	 30.0	(33)	 46.0	(31)	 46.0	(32)	 27.5	(30)	 33.5	40.02	±19.67	
Fargo-Moorhead,ND-MN	2520	118	  0	  5	 76	 29.0	(30)	 18.0	(29)	 19.0	(31)	 21.5	(28)	 19.5	23.88	±15.12	
Fort Wayne,IN	2760	122	  0	 11	 96	 40.0	(31)	 36.5	(30)	 41.0	(31)	 34.5	(30)	 37.5	39.61	±18.93	
Fort Worth-Arlington,TX	2800	366	  0	  7	 94	 38.0	(91)	 35.0	(91)	 47.0	(92)	 29.5	(92)	 36.0	39.27	±16.37	
Gary,IN	2960	122	  6	 13	115	 60.0	(31)	 48.5	(30)	 59.0	(31)	 56.0	(30)	 56.5	56.65	±22.47	
Grand Rapids-Muskegon-Holland,MI	3000	364	  3	  6	113	 46.5	(90)	 29.0	(91)	 37.0	(92)	 30.0	(91)	 34.0	39.00	±21.41	
Greensboro-Winston Salem-High Point,NC	3120	363	  2	 11	107	 42.0	(89)	 54.0	(90)	 57.5	(92)	 44.5	(92)	 52.0	48.38	±18.94	
Greenville-Spartanburg-Anderson,SC	3160	362	  0	 10	 98	 41.0	(88)	 47.0	(91)	 55.0	(91)	 47.0	(92)	 47.0	47.30	±17.93	
Houston,TX	3360	348	  1	  9	112	 44.5	(90)	 45.0	(90)	 55.0	(90)	 38.0	(78)	 47.0	46.71	±16.02	
Huntington-Ashland,WV-KY-OH	3400	126	  0	 13	 89	 38.0	(34)	 44.0	(30)	 63.0	(31)	 42.0	(31)	 44.0	46.79	±17.27	
Indianapolis,IN	3480	366	  1	  9	107	 48.0	(91)	 44.0	(91)	 52.0	(92)	 46.5	(92)	 48.0	46.75	±18.99	
Jackson,MS	3560	121	  0	  7	 87	 37.0	(31)	 34.0	(29)	 44.0	(31)	 33.0	(30)	 38.0	41.69	±16.44	
Jersey City,NJ	3640	120	  0	 14	100	 36.0	(31)	 41.0	(28)	 38.0	(31)	 33.5	(30)	 38.0	41.95	±20.66	
Kansas City,MO-KS	3760	353	  0	 10	 96	 45.0	(90)	 35.5	(88)	 36.0	(86)	 32.0	(89)	 37.0	38.87	±15.79	
Knoxville,TN	3840	361	  1	 11	132	 41.0	(90)	 52.0	(91)	 58.0	(89)	 45.0	(91)	 49.0	48.34	±18.21	
Lafayette,LA	3880	120	  0	  9	 93	 30.0	(30)	 26.0	(30)	 36.0	(31)	 29.0	(29)	 30.0	33.77	±15.76	
Las Cruces,NM	4100	121	  0	  6	 98	 32.5	(30)	 28.0	(30)	 26.0	(31)	 26.0	(30)	 28.0	32.56	±18.31	
Las Vegas,NV-AZ	4120	366	  2	 13	139	 39.0	(91)	 45.0	(91)	 39.0	(92)	 38.0	(92)	 39.0	41.93	±15.80	
Lincoln,NE	4360	117	  0	  7	 93	 33.5	(30)	 21.0	(30)	 25.5	(28)	 20.0	(29)	 25.0	28.31	±15.83	
Little Rock-North Little Rock,AR	4400	366	  0	  7	 98	 40.0	(91)	 41.0	(91)	 47.5	(92)	 38.0	(92)	 41.0	42.07	±16.53	
Los Angeles-Long Beach,CA	4480	366	 31	 12	157	 63.0	(91)	 55.0	(91)	 56.0	(92)	 60.5	(92)	 57.5	62.36	±25.56	
Louisville,KY-IN	4520	366	  2	 11	111	 43.0	(91)	 46.0	(91)	 56.5	(92)	 41.0	(92)	 46.0	47.49	±17.79	
Memphis,TN-AR-MS	4920	364	  0	  8	 96	 39.0	(91)	 38.5	(90)	 47.5	(92)	 33.0	(91)	 40.0	41.60	±16.52	
Miami,FL	5000	344	  2	 12	147	 30.0	(87)	 31.0	(91)	 28.0	(74)	 25.5	(92)	 28.0	31.09	±14.03	
Middlesex-Somerset-Hunterdon,NJ	5015	118	  0	  8	 98	 30.0	(31)	 33.0	(26)	 38.0	(31)	 24.0	(30)	 31.0	34.34	±19.48	
Milwaukee-Waukesha,WI	5080	149	  4	 10	118	 52.0	(39)	 27.0	(41)	 36.0	(35)	 33.5	(34)	 36.0	41.24	±21.59	
Minneapolis-St. Paul,MN-WI	5120	126	  0	 12	 97	 43.0	(31)	 27.5	(30)	 31.0	(33)	 31.0	(32)	 32.5	37.44	±18.06	
Monmouth-Ocean,NJ	5190	106	  0	 11	 94	 25.0	(30)	 30.0	(26)	 26.5	(24)	 20.0	(26)	 25.0	31.94	±18.78	
Nashville,TN	5360	366	  0	  9	 93	 39.0	(91)	 39.0	(91)	 51.5	(92)	 34.5	(92)	 40.0	42.49	±16.38	
Nassau-Suffolk,NY	5380	125	  0	  6	 97	 33.0	(31)	 35.0	(31)	 28.0	(32)	 29.0	(31)	 32.0	35.98	±19.32	
New Orleans,LA	5560	366	  2	 11	110	 35.0	(91)	 30.0	(91)	 46.0	(92)	 34.0	(92)	 36.0	38.84	±16.42	
New York,NY	5600	366	  5	  8	125	 42.0	(91)	 46.0	(91)	 38.5	(92)	 39.0	(92)	 42.0	45.17	±20.60	
Newark,NJ	5640	341	  7	  9	132	 41.0	(84)	 51.0	(83)	 44.0	(84)	 38.0	(90)	 44.0	45.87	±21.51	
Norfolk-Virginia Beach-Newport News,VA_NC	5720	350	  1	  7	102	 40.5	(86)	 43.0	(90)	 37.5	(84)	 37.5	(90)	 40.0	39.91	±17.80	
Oklahoma City,OK	5880	366	  0	  5	 88	 32.0	(91)	 27.0	(91)	 36.5	(92)	 22.0	(92)	 28.5	31.45	±15.30	
Omaha,NE-IA	5920	364	  1	  7	124	 38.0	(89)	 26.0	(91)	 29.0	(92)	 26.5	(92)	 29.0	32.23	±17.12	
Orlando,FL	5960	343	  0	  9	 77	 34.0	(91)	 31.0	(90)	 31.0	(71)	 28.0	(91)	 31.0	32.73	±12.47	
Philadelphia,PA-NJ	6160	366	  2	  6	120	 45.0	(91)	 46.0	(91)	 44.5	(92)	 38.0	(92)	 44.0	45.40	±20.48	
Phoenix-Mesa,AZ	6200	149	  0	  5	 95	 40.0	(37)	 28.0	(36)	 30.0	(37)	 42.0	(39)	 33.0	36.75	±16.85	
Pittsburgh,PA	6280	365	 39	 10	167	 45.0	(91)	 55.0	(91)	 73.5	(92)	 49.0	(91)	 55.0	59.98	±31.78	
Portland-Vancouver,OR-WA	6440	129	  3	  7	114	 35.0	(31)	 22.0	(30)	 24.0	(31)	 53.0	(37)	 30.0	36.05	±23.07	
Provo-Orem,UT	6520	359	 22	  3	161	 48.0	(90)	 22.0	(88)	 21.0	(91)	 35.0	(90)	 26.0	37.73	±31.55	
Raleigh-Durham-Chapel Hill,NC	6640	365	  1	 10	103	 39.0	(91)	 52.0	(91)	 52.0	(92)	 44.0	(91)	 46.0	45.22	±17.75	
Rapid City,SD	6660	123	  0	  9	 78	 32.0	(31)	 26.0	(31)	 31.0	(31)	 28.0	(30)	 28.0	30.11	±11.96	
Reno,NV	6720	128	  0	  5	 79	 17.0	(32)	 16.5	(30)	 21.0	(31)	 31.0	(35)	 21.0	25.55	±15.74	
Richmond-Petersburg,VA	6760	309	  0	  9	 96	 37.0	(88)	 49.5	(84)	 55.0	(69)	 38.5	(68)	 41.0	42.99	±17.64	
St, Louis,MO-IL	7040	366	  2	 13	116	 49.0	(91)	 46.0	(91)	 53.0	(92)	 44.0	(92)	 48.0	48.00	±17.89	
Salt Lake City-Ogden,UT	7160	363	 36	  5	168	 59.5	(90)	 26.0	(91)	 24.0	(91)	 38.0	(91)	 32.0	44.57	±35.24	
Santa Fe,NM	7490	114	  0	  6	 56	 14.0	(30)	 14.5	(26)	 14.0	(28)	 15.5	(30)	 14.0	15.62	±6.43	
Seattle-Bellevue-Everett,WA	7600	360	  1	  8	107	 25.0	(87)	 22.0	(91)	 26.5	(90)	 36.0	(92)	 27.0	31.24	±17.63	
Shreveport-Bossier City,LA	7680	118	  0	  6	 81	 30.0	(30)	 31.5	(28)	 47.0	(31)	 29.0	(29)	 33.5	37.79	±15.60	
Sioux Falls,SD	7760	123	  0	 10	 88	 32.5	(30)	 26.0	(31)	 31.0	(32)	 29.0	(30)	 31.0	32.43	±14.00	
Spokane,WA	7840	119	  0	  5	 93	 32.5	(32)	 20.0	(30)	 26.0	(29)	 39.0	(28)	 28.0	31.17	±18.10	
Tacoma,WA	8200	115	  3	  6	133	 27.0	(27)	 18.0	(30)	 24.0	(28)	 40.0	(30)	 25.0	32.36	±26.01	
Tampa-St. Petersburg-Clearwater,FL	8280	366	  0	 11	 92	 41.0	(91)	 40.0	(91)	 32.0	(92)	 34.0	(92)	 36.0	37.81	±13.60	
Topeka,KS	8440	125	  0	  6	 95	 37.0	(31)	 25.5	(30)	 30.5	(34)	 27.0	(30)	 29.0	31.68	±15.48	
Tucson,AZ	8520	355	  0	  6	 53	 22.0	(87)	 18.0	(90)	 15.0	(91)	 19.0	(87)	 18.0	19.05	±6.86	
Tulsa,OK	8560	366	  0	  6	 89	 38.0	(91)	 33.0	(91)	 38.5	(92)	 24.0	(92)	 31.0	34.75	±16.14	
Washington,DC-MD-VA-WV	8840	366	  3	 10	113	 42.0	(91)	 51.0	(91)	 58.5	(92)	 42.0	(92)	 49.0	48.06	±20.37	
Wichita,KS	9040	126	  0	  9	 72	 36.0	(31)	 30.0	(33)	 32.5	(32)	 29.0	(30)	 32.0	34.59	±14.82	
Wilmington-Newark,DE-MD	9160	357	  2	  9	126	 47.0	(89)	 43.5	(86)	 46.0	(91)	 37.0	(91)	 44.0	45.99	±19.84	
Wilmington,NC	9200	112	  0	  3	 75	 29.0	(29)	 37.0	(30)	 42.0	(23)	 29.0	(30)	 32.0	33.16	±15.34