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	
Akron,OH	  80	215	  0	  9	 95	 26.0	(1)	 40.0	(91)	 38.0	(92)	 20.0	(31)	 37.0	37.30	±14.95	
Albuquerque,NM	 200	365	  0	 17	 90	 36.5	(90)	 48.0	(91)	 43.0	(92)	 30.0	(92)	 39.0	41.16	±11.97	
Atlanta,GA	 520	246	 29	 19	192	 39.0	(32)	 50.0	(91)	 54.0	(92)	 32.0	(31)	 46.5	59.60	±33.03	
Atlantic-Cape May,NJ	 560	360	  1	  5	124	 27.0	(88)	 38.0	(90)	 38.5	(92)	 22.0	(90)	 30.0	31.92	±13.55	
Augusta-Aiken,GA	 600	362	  4	  8	122	 27.5	(90)	 45.0	(91)	 43.0	(92)	 26.0	(89)	 37.5	37.99	±16.69	
Austin-San Marcos,TX	 640	365	  4	  2	116	 32.0	(90)	 42.0	(91)	 34.5	(92)	 30.0	(92)	 34.0	38.69	±17.15	
Baltimore,MD	 720	365	 16	  2	164	 23.5	(90)	 44.0	(91)	 47.0	(92)	 19.0	(92)	 30.0	37.63	±26.73	
Baton Rouge,LA	 760	365	 15	 13	145	 34.0	(90)	 50.0	(91)	 43.5	(92)	 34.0	(92)	 38.0	44.46	±22.23	
Bergen-Passaic,NJ	 875	362	  4	  2	124	 23.0	(90)	 35.0	(91)	 35.0	(92)	 20.0	(89)	 27.5	30.13	±17.52	
Biloxi-Gulfport-Pascagoula,MS	 920	246	  4	 14	122	 39.5	(32)	 41.0	(91)	 35.0	(92)	 38.0	(31)	 38.0	41.99	±17.57	
Birmingham,AL	1000	365	 15	  5	161	 26.0	(90)	 47.0	(91)	 48.0	(92)	 20.0	(92)	 38.0	40.83	±24.62	
Bismarck,ND	1010	337	  0	  6	 54	 23.0	(65)	 34.0	(88)	 35.0	(92)	 19.0	(92)	 27.0	27.47	±9.65	
Boise City,ID	1080	153	  2	 16	114	   . 	(.)	 45.0	(61)	 48.0	(92)	   . 	(.)	 47.0	49.33	±16.62	
Charleston-North Charleston,SC	1440	365	  1	 14	111	 31.0	(90)	 45.0	(91)	 37.0	(92)	 28.0	(92)	 34.0	36.97	±13.61	
Charleston,WV	1480	214	  1	  4	111	   . 	(.)	 40.0	(91)	 38.5	(92)	 24.0	(31)	 37.5	37.36	±15.76	
Charlotte-Gastonia-Rock Hill,NC-SC	1520	365	 17	  8	147	 29.0	(90)	 50.0	(91)	 48.0	(92)	 26.0	(92)	 37.0	43.50	±24.16	
Chicago,IL	1600	365	  3	  5	116	 25.0	(90)	 41.0	(91)	 40.0	(92)	 20.0	(92)	 30.0	32.18	±15.80	
Cincinnati,OH-KY-IN	1640	246	  7	 11	135	 28.0	(32)	 45.0	(91)	 45.0	(92)	 27.0	(31)	 40.0	43.96	±21.72	
Cleveland-Lorain-Elyria,OH	1680	215	  5	 18	137	 26.0	(1)	 41.0	(91)	 41.5	(92)	 25.0	(31)	 40.0	43.82	±20.04	
Colorado Springs,CO	1720	365	  0	 11	 87	 34.0	(90)	 47.0	(91)	 43.5	(92)	 30.0	(92)	 38.0	39.45	±11.93	
Columbia,SC	1760	365	  2	 11	116	 30.0	(90)	 48.0	(91)	 42.0	(92)	 25.5	(92)	 36.0	38.75	±16.81	
Dallas,TX	1920	365	 26	 10	154	 34.0	(90)	 47.0	(91)	 48.5	(92)	 30.0	(92)	 40.0	47.29	±26.20	
Dayton-Springfield,OH	2000	215	  2	  9	116	 26.0	(1)	 44.0	(91)	 40.5	(92)	 27.0	(31)	 41.0	41.58	±16.14	
Daytona Beach,FL	2020	365	  0	 10	 79	 33.5	(90)	 40.0	(91)	 30.0	(92)	 30.5	(92)	 33.0	33.97	±10.47	
Denver,CO	2080	365	  8	 17	129	 36.5	(90)	 50.0	(91)	 51.0	(92)	 32.5	(92)	 39.0	45.88	±19.42	
Des Moines,IA	2120	215	  0	  8	 69	 23.0	(1)	 38.0	(91)	 34.0	(92)	 22.0	(31)	 34.0	34.08	±10.49	
Detroit,MI	2160	357	  1	  2	116	 20.0	(86)	 38.0	(91)	 37.5	(92)	 12.0	(88)	 27.0	28.80	±18.04	
Dover,DE	2190	219	  4	  4	111	 41.0	(1)	 41.0	(91)	 39.5	(90)	 26.0	(37)	 38.0	39.76	±16.91	
El Paso,TX	2320	365	  5	 18	119	 33.0	(90)	 48.0	(91)	 43.0	(92)	 31.0	(92)	 37.0	40.68	±15.50	
Eugene-Springfield,OR	2400	154	  0	 10	100	   . 	(.)	 30.5	(62)	 33.0	(92)	   . 	(.)	 32.0	33.73	±14.56	
Fargo-Moorhead,ND-MN	2520	365	  0	  5	 54	 28.0	(90)	 37.0	(91)	 31.0	(92)	 18.0	(92)	 29.0	28.19	±9.35	
Fayetteville-Springdale-Rogers,AR	2580	 89	  0	  9	 44	   . 	(.)	   . 	(.)	   . 	(.)	 25.0	(89)	 25.0	24.80	±7.13	
Fort Lauderdale,FL	2680	364	  2	 10	122	 33.5	(90)	 34.0	(91)	 20.0	(91)	 31.0	(92)	 30.0	31.19	±12.49	
Fort Worth-Arlington,TX	2800	365	 23	  9	156	 34.0	(90)	 46.0	(91)	 46.0	(92)	 29.0	(92)	 37.0	45.56	±26.11	
Gary,IN	2960	184	  2	 13	104	 15.0	(1)	 38.0	(91)	 39.0	(92)	   . 	(.)	 38.0	40.35	±14.41	
Grand Rapids-Muskegon-Holland,MI	3000	184	  6	 13	151	 16.0	(1)	 39.0	(91)	 37.5	(92)	   . 	(.)	 38.0	42.64	±21.55	
Greensboro-Winston Salem-High Point,NC	3120	215	  5	 12	116	 35.0	(1)	 46.0	(91)	 43.0	(92)	 27.0	(31)	 43.0	46.23	±19.27	
Greenville-Spartanburg-Anderson,SC	3160	365	  5	  9	124	 30.0	(90)	 46.0	(91)	 47.0	(92)	 27.0	(92)	 37.0	40.46	±17.94	
Hickory-Morganton-Lenoir,NC	3290	215	  0	  6	 95	 29.0	(1)	 45.0	(91)	 41.0	(92)	 28.0	(31)	 41.0	41.16	±13.09	
Honolulu,HI	3320	363	  0	  2	 33	 23.0	(90)	 15.0	(90)	  7.0	(91)	 12.0	(92)	 13.0	14.36	±7.77	
Huntington-Ashland,WV-KY-OH	3400	246	  4	  9	122	 31.5	(32)	 45.0	(91)	 45.0	(92)	 27.0	(31)	 40.0	42.93	±17.83	
Indianapolis,IN	3480	184	  2	 16	109	 24.0	(1)	 44.0	(91)	 42.0	(92)	   . 	(.)	 42.5	46.17	±17.47	
Jackson,MS	3560	246	  1	 11	101	 37.0	(32)	 39.0	(91)	 37.0	(92)	 30.0	(31)	 37.0	38.40	±13.20	
Jacksonville,FL	3600	365	  1	 13	111	 34.0	(90)	 42.0	(91)	 37.0	(92)	 32.0	(92)	 35.0	37.06	±13.14	
Jersey City,NJ	3640	359	  6	  2	122	 20.0	(90)	 32.0	(91)	 34.0	(89)	 16.0	(89)	 23.0	26.89	±17.12	
Johnson City-Kingsport-Bristol,TN-VA	3660	246	  4	 11	135	 36.0	(32)	 44.0	(91)	 41.5	(92)	 26.0	(31)	 40.5	42.38	±17.28	
Kansas City,MO-KS	3760	365	 16	  9	154	 28.0	(90)	 45.0	(91)	 47.0	(92)	 23.0	(92)	 34.0	40.05	±23.24	
Lafayette,LA	3880	365	  3	  5	122	 30.0	(90)	 39.0	(91)	 35.5	(92)	 27.0	(92)	 32.0	34.68	±15.30	
Las Cruces,NM	4100	365	  2	 21	111	 34.0	(90)	 48.0	(91)	 42.0	(92)	 32.0	(92)	 38.0	40.81	±13.05	
Las Vegas,NV-AZ	4120	365	  8	 17	135	 36.0	(90)	 56.0	(91)	 49.5	(92)	 31.0	(92)	 42.0	46.99	±19.40	
Lincoln,NE	4360	215	  0	  5	 54	  9.0	(1)	 33.0	(91)	 23.5	(92)	 20.0	(31)	 28.0	27.46	±8.12	
Little Rock-North Little Rock,AR	4400	365	  5	  9	119	 29.0	(90)	 41.0	(91)	 42.0	(92)	 26.0	(92)	 34.0	36.48	±16.25	
Los Angeles-Long Beach,CA	4480	365	 51	 19	202	 34.0	(90)	 61.0	(91)	 87.0	(92)	 33.5	(92)	 41.0	57.90	±36.98	
Louisville,KY-IN	4520	246	  6	  6	142	 32.5	(32)	 45.0	(91)	 42.5	(92)	 25.0	(31)	 40.0	43.65	±20.13	
Memphis,TN-AR-MS	4920	365	  9	  8	151	 30.0	(90)	 48.0	(91)	 43.5	(92)	 23.0	(92)	 36.0	40.62	±22.49	
Miami,FL	5000	365	  1	  8	140	 37.0	(90)	 35.0	(91)	 23.0	(92)	 33.5	(92)	 32.0	33.64	±13.81	
Middlesex-Somerset-Hunterdon,NJ	5015	360	  9	  3	154	 27.0	(88)	 39.0	(91)	 40.0	(92)	 22.0	(89)	 30.0	35.05	±20.72	
Milwaukee-Waukesha,WI	5080	364	  2	  2	122	 22.5	(90)	 36.0	(91)	 37.5	(92)	 15.0	(91)	 29.0	28.67	±15.16	
Minneapolis-St. Paul,MN-WI	5120	365	  0	  6	 90	 28.5	(90)	 40.0	(91)	 36.5	(92)	 20.0	(92)	 30.0	31.07	±12.67	
Monmouth-Ocean,NJ	5190	232	 10	 14	145	 33.0	(9)	 40.0	(91)	 41.0	(92)	 26.5	(40)	 37.5	42.75	±22.03	
Nashville,TN	5360	246	  7	 19	135	 36.5	(32)	 48.0	(91)	 46.0	(92)	 30.0	(31)	 44.0	47.65	±19.17	
Nassau-Suffolk,NY	5380	365	  5	  5	203	 30.0	(90)	 39.0	(91)	 39.5	(92)	 25.0	(92)	 32.0	35.67	±19.62	
New Orleans,LA	5560	365	  3	 12	127	 34.5	(90)	 45.0	(91)	 38.0	(92)	 30.0	(92)	 36.0	39.52	±16.89	
New York,NY	5600	365	  8	  8	172	 28.0	(90)	 39.0	(91)	 38.0	(92)	 23.0	(92)	 31.0	35.17	±19.69	
Newark,NJ	5640	345	  8	  4	140	 25.0	(89)	 43.5	(90)	 37.0	(74)	 23.0	(92)	 30.0	35.13	±20.89	
Norfolk-Virginia Beach-Newport News,VA_NC	5720	215	  2	 13	116	 45.0	(1)	 44.0	(91)	 41.0	(92)	 29.0	(31)	 41.0	42.59	±14.94	
Oklahoma City,OK	5880	365	 11	  9	127	 30.0	(90)	 47.0	(91)	 46.0	(92)	 27.0	(92)	 38.0	42.48	±20.80	
Olympia,WA	5910	154	  0	  2	100	   . 	(.)	 30.0	(62)	 26.0	(92)	   . 	(.)	 27.5	29.06	±11.52	
Omaha,NE-IA	5920	215	  0	 10	 77	 20.0	(1)	 38.0	(91)	 33.0	(92)	 22.0	(31)	 34.0	34.05	±11.37	
Orlando,FL	5960	365	  1	 15	109	 35.0	(90)	 45.0	(91)	 34.0	(92)	 31.0	(92)	 36.0	38.89	±14.50	
Philadelphia,PA-NJ	6160	365	 13	  6	177	 28.5	(90)	 43.0	(91)	 45.0	(92)	 23.0	(92)	 33.0	39.82	±24.04	
Phoenix-Mesa,AZ	6200	365	 11	 19	129	 38.0	(90)	 61.0	(91)	 51.0	(92)	 36.0	(92)	 43.0	50.42	±20.74	
Pittsburgh,PA	6280	365	  5	  2	122	 27.0	(90)	 44.0	(91)	 42.0	(92)	 20.5	(92)	 31.0	35.20	±19.27	
Portland-Vancouver,OR-WA	6440	154	  1	 11	154	   . 	(.)	 31.0	(62)	 28.5	(92)	   . 	(.)	 30.0	33.44	±15.18	
Provo-Orem,UT	6520	154	  0	 26	 95	   . 	(.)	 48.0	(62)	 47.0	(92)	   . 	(.)	 47.5	50.62	±14.60	
Raleigh-Durham-Chapel Hill,NC	6640	361	  2	  2	116	 27.0	(86)	 45.0	(91)	 44.0	(92)	 22.0	(92)	 35.0	36.69	±17.66	
Rapid City,SD	6660	365	  0	  7	 49	 29.0	(90)	 34.0	(91)	 32.0	(92)	 21.0	(92)	 29.0	29.18	±7.79	
Reno,NV	6720	365	  0	 10	 82	 33.0	(90)	 42.0	(91)	 47.0	(92)	 30.0	(92)	 37.0	38.35	±12.25	
Richmond-Petersburg,VA	6760	215	  9	 13	132	 41.0	(1)	 44.0	(91)	 44.5	(92)	 27.0	(31)	 41.0	45.84	±20.93	
Riverside-San Bernardino,CA	6780	365	 85	 30	208	 39.5	(90)	 92.0	(91)	105.0	(92)	 38.0	(92)	 48.0	69.81	±41.79	
St, Louis,MO-IL	7040	365	 17	  3	135	 23.0	(90)	 45.0	(91)	 49.0	(92)	 19.0	(92)	 32.0	38.53	±24.96	
Salt Lake City-Ogden,UT	7160	365	  5	  4	127	 27.0	(90)	 47.0	(91)	 50.0	(92)	 19.5	(92)	 34.0	38.35	±22.60	
San Diego,CA	7320	365	 14	 19	140	 38.0	(90)	 48.0	(91)	 51.0	(92)	 38.0	(92)	 42.0	49.69	±21.33	
Scranton-Wilkes Barre-Hazleton,PA	7560	215	  0	 11	 95	 38.0	(1)	 38.0	(91)	 34.0	(92)	 25.0	(31)	 34.0	35.72	±12.69	
Seattle-Bellevue-Everett,WA	7600	230	  4	  2	166	   . 	(.)	 34.0	(62)	 30.0	(92)	 13.5	(76)	 26.0	29.72	±21.88	
Shreveport-Bossier City,LA	7680	365	  5	  5	111	 31.0	(90)	 42.0	(91)	 45.0	(92)	 29.5	(92)	 35.0	39.97	±17.58	
Sioux Falls,SD	7760	350	  0	  2	 69	 27.0	(90)	 40.0	(76)	 33.0	(92)	 21.0	(92)	 28.0	29.30	±10.74	
Spokane,WA	7840	154	  0	 11	 82	   . 	(.)	 38.0	(62)	 40.0	(92)	   . 	(.)	 39.0	40.08	±9.82	
Tacoma,WA	8200	364	  3	  4	159	 32.0	(90)	 34.0	(91)	 33.0	(92)	 24.0	(91)	 31.0	32.15	±13.31	
Tampa-St. Petersburg-Clearwater,FL	8280	365	  3	 18	119	 38.0	(90)	 47.0	(91)	 38.0	(92)	 34.0	(92)	 38.0	42.09	±16.25	
Toledo,OH	8400	215	  0	 12	 92	 23.0	(1)	 41.0	(91)	 38.5	(92)	 23.0	(31)	 38.0	38.63	±13.80	
Topeka,KS	8440	 62	  0	 11	 41	   . 	(.)	   . 	(.)	   . 	(.)	 22.0	(62)	 22.0	22.19	±5.67	
Trenton,NJ	8480	361	  6	  4	147	 27.0	(90)	 39.0	(90)	 41.0	(92)	 20.0	(89)	 30.0	34.15	±20.05	
Tucson,AZ	8520	365	  0	 22	 97	 38.0	(90)	 46.0	(91)	 43.0	(92)	 34.0	(92)	 39.0	41.80	±11.39	
Tulsa,OK	8560	365	  9	 12	169	 29.5	(90)	 44.0	(91)	 50.0	(92)	 27.0	(92)	 38.0	41.98	±21.03	
Washington,DC-MD-VA-WV	8840	365	 21	  5	201	 27.0	(90)	 44.0	(91)	 47.5	(92)	 22.0	(92)	 34.0	41.07	±28.47	
West Palm Beach-Boca Raton,FL	8960	363	  0	 13	100	 33.0	(90)	 38.0	(91)	 22.0	(90)	 30.0	(92)	 30.0	31.78	±11.13	
Wichita,KS	9040	365	  0	  8	 92	 24.0	(90)	 41.0	(91)	 40.0	(92)	 22.0	(92)	 31.0	33.06	±13.57	
Wilmington-Newark,DE-MD	9160	365	  6	  5	142	 23.5	(90)	 41.0	(91)	 41.0	(92)	 20.0	(92)	 30.0	34.89	±20.95	
Wilmington,NC	9200	212	  0	  2	 87	 41.0	(1)	 41.0	(88)	 33.0	(92)	 30.0	(31)	 36.5	36.49	±11.98	
Youngstown-Warren,OH	9320	215	  2	 14	111	 28.0	(1)	 39.0	(91)	 38.0	(92)	 23.0	(31)	 36.0	39.16	±16.06	
Yuma,AZ	9360	365	  0	 15	 85	 34.0	(90)	 43.0	(91)	 34.0	(92)	 30.0	(92)	 35.0	36.02	±9.66