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	  0	 20	100	 35.0	(90)	 48.0	(91)	 47.0	(92)	 33.0	(92)	 40.0	42.59	±12.95	
Asheville,NC	 480	211	  7	  5	132	 23.0	(1)	 41.0	(87)	 39.0	(92)	 22.0	(31)	 38.0	43.17	±22.70	
Atlanta,GA	 520	246	 37	 12	202	 33.0	(32)	 43.0	(91)	 58.5	(92)	 27.0	(31)	 42.0	57.17	±38.49	
Augusta-Aiken,GA	 600	362	 11	  8	142	 28.0	(90)	 45.0	(91)	 45.5	(92)	 24.0	(89)	 34.0	39.13	±22.46	
Austin-San Marcos,TX	 640	365	  5	  6	140	 29.5	(90)	 36.0	(91)	 34.0	(92)	 27.0	(92)	 30.0	33.57	±16.76	
Baltimore,MD	 720	365	 39	  2	202	 26.0	(90)	 46.0	(91)	 74.0	(92)	 20.5	(92)	 34.0	47.21	±39.53	
Baton Rouge,LA	 760	365	  6	 10	154	 30.0	(90)	 42.0	(91)	 38.5	(92)	 27.5	(92)	 33.0	36.63	±17.51	
Bergen-Passaic,NJ	 875	365	 20	  2	174	 23.0	(90)	 38.0	(91)	 44.5	(92)	 20.0	(92)	 29.0	37.43	±29.44	
Biloxi-Gulfport-Pascagoula,MS	 920	243	  1	 11	114	 36.0	(32)	 37.0	(91)	 36.5	(90)	 30.0	(30)	 35.0	38.72	±14.25	
Birmingham,AL	1000	307	 17	  2	169	 31.5	(32)	 43.0	(91)	 46.0	(92)	 20.0	(92)	 36.0	41.24	±26.65	
Boise City,ID	1080	215	  1	  6	109	  6.0	(1)	 41.0	(91)	 43.0	(92)	 30.0	(31)	 40.0	42.44	±14.34	
Boston,MA-NH	1120	365	 19	  3	205	 26.0	(90)	 40.0	(91)	 41.0	(92)	 24.0	(92)	 30.0	39.13	±29.53	
Charleston-North Charleston,SC	1440	365	  1	  9	111	 30.0	(90)	 37.0	(91)	 35.5	(92)	 24.0	(92)	 30.0	33.02	±13.45	
Charleston,WV	1480	214	  6	  2	124	 24.0	(1)	 39.0	(91)	 44.0	(92)	 15.5	(30)	 38.0	43.08	±24.28	
Charlotte-Gastonia-Rock Hill,NC-SC	1520	233	 38	  4	187	 34.0	(13)	 48.0	(91)	 69.0	(92)	 25.0	(37)	 47.0	60.57	±39.24	
Chicago,IL	1600	365	 21	  6	179	 23.5	(90)	 38.0	(91)	 48.0	(92)	 21.0	(92)	 30.0	39.15	±29.82	
Cincinnati,OH-KY-IN	1640	246	 29	  8	182	 27.5	(32)	 42.0	(91)	 57.5	(92)	 22.0	(31)	 41.0	52.13	±34.21	
Cleveland-Lorain-Elyria,OH	1680	215	 31	  9	195	 28.0	(1)	 41.0	(91)	 59.0	(92)	 25.0	(31)	 43.0	59.41	±40.31	
Columbia,SC	1760	365	 18	  4	150	 28.0	(90)	 46.0	(91)	 48.0	(92)	 24.0	(92)	 33.0	39.91	±23.54	
Columbus,OH	1840	215	 28	  5	185	 26.0	(1)	 45.0	(91)	 52.0	(92)	 24.0	(31)	 45.0	56.87	±34.27	
Dallas,TX	1920	365	 22	  7	185	 31.0	(90)	 41.0	(91)	 48.5	(92)	 27.0	(92)	 34.0	43.24	±27.09	
Denver,CO	2080	365	  7	  3	124	 33.5	(90)	 46.0	(91)	 49.0	(92)	 33.0	(92)	 37.0	42.51	±19.41	
Des Moines,IA	2120	215	  0	  3	 59	 18.0	(1)	 34.0	(91)	 30.5	(92)	 18.0	(31)	 31.0	30.66	±9.76	
Detroit,MI	2160	184	 21	 15	174	 23.0	(1)	 35.0	(91)	 45.0	(92)	   . 	(.)	 38.0	50.86	±32.25	
Dover,DE	2190	227	 10	 11	135	 33.0	(13)	 42.0	(91)	 46.0	(92)	 25.0	(31)	 40.0	45.84	±23.92	
Fargo-Moorhead,ND-MN	2520	331	  0	  7	 56	 25.0	(63)	 35.0	(91)	 30.0	(85)	 20.0	(92)	 27.0	27.29	±9.07	
Fayetteville,NC	2560	215	 18	  5	159	 16.0	(1)	 45.0	(91)	 48.5	(92)	 27.0	(31)	 44.0	50.87	±29.38	
Fort Lauderdale,FL	2680	365	  1	  9	114	 30.0	(90)	 27.0	(91)	 20.0	(92)	 27.5	(92)	 26.0	27.10	±9.73	
Fort Wayne,IN	2760	184	 15	 19	140	 20.0	(1)	 38.0	(91)	 44.5	(92)	   . 	(.)	 41.0	50.19	±26.24	
Fort Worth-Arlington,TX	2800	365	 33	  5	202	 33.0	(90)	 42.0	(91)	 48.0	(92)	 26.0	(92)	 35.0	44.96	±31.68	
Gary,IN	2960	184	 23	 10	187	 10.0	(1)	 38.0	(91)	 47.0	(92)	   . 	(.)	 41.0	53.84	±31.84	
Grand Rapids-Muskegon-Holland,MI	3000	184	 20	 22	185	 27.0	(1)	 38.0	(91)	 44.0	(92)	   . 	(.)	 41.0	52.76	±31.57	
Greensboro-Winston Salem-High Point,NC	3120	215	 30	  7	177	 22.0	(1)	 48.0	(91)	 55.0	(92)	 22.0	(31)	 47.0	57.00	±34.77	
Greenville-Spartanburg-Anderson,SC	3160	364	 28	  2	156	 27.0	(90)	 45.0	(91)	 56.0	(92)	 23.0	(91)	 35.0	43.22	±28.95	
Hartford,CN	3280	365	 21	  2	201	 22.0	(90)	 41.0	(91)	 40.0	(92)	 20.0	(92)	 28.0	36.65	±30.30	
Honolulu,HI	3320	361	  0	  3	 35	 23.0	(90)	 18.0	(89)	 13.5	(92)	 22.0	(90)	 19.0	19.40	±6.52	
Houston,TX	3360	365	 29	  9	209	 30.0	(90)	 48.0	(91)	 46.0	(92)	 27.0	(92)	 35.0	46.16	±33.07	
Huntington-Ashland,WV-KY-OH	3400	246	 25	  4	159	 31.5	(32)	 44.0	(91)	 50.5	(92)	 23.0	(31)	 41.5	52.20	±31.48	
Indianapolis,IN	3480	184	 24	 21	203	 21.0	(1)	 45.0	(91)	 56.0	(92)	   . 	(.)	 48.0	62.10	±34.96	
Jackson,MS	3560	246	  2	 11	114	 33.0	(32)	 36.0	(91)	 36.5	(92)	 24.0	(31)	 34.0	36.10	±13.40	
Jacksonville,FL	3600	365	  0	  6	 79	 30.0	(90)	 33.0	(91)	 29.0	(92)	 30.0	(92)	 30.0	30.90	±10.54	
Jersey City,NJ	3640	365	  6	  2	135	 19.5	(90)	 32.0	(91)	 37.0	(92)	 14.0	(92)	 23.0	28.71	±21.42	
Kansas City,MO-KS	3760	365	 12	  3	145	 22.5	(90)	 41.0	(91)	 51.0	(92)	 17.0	(92)	 30.0	37.07	±25.06	
Knoxville,TN	3840	365	 45	 20	156	 40.0	(90)	 51.0	(91)	 78.0	(92)	 38.0	(92)	 44.0	56.01	±30.73	
Lafayette,LA	3880	358	  0	  8	 97	 27.0	(90)	 33.0	(89)	 31.0	(88)	 27.0	(91)	 29.0	31.06	±12.49	
Las Cruces,NM	4100	365	  3	 20	114	 34.0	(90)	 44.0	(91)	 48.0	(92)	 31.0	(92)	 38.0	41.71	±14.26	
Las Vegas,NV-AZ	4120	365	  6	 20	122	 34.0	(90)	 54.0	(91)	 52.5	(92)	 33.0	(92)	 42.0	47.08	±19.36	
Lexington,KY	4280	246	  6	  7	122	 29.0	(32)	 38.0	(91)	 46.0	(92)	 20.0	(31)	 37.0	40.90	±20.54	
Lincoln,NE	4360	214	  0	  3	 46	 21.0	(1)	 31.0	(91)	 30.0	(91)	 19.0	(31)	 29.0	28.27	±8.47	
Little Rock-North Little Rock,AR	4400	365	  9	  7	116	 24.0	(90)	 38.0	(91)	 45.0	(92)	 26.0	(92)	 30.0	35.47	±19.54	
Los Angeles-Long Beach,CA	4480	365	 68	 16	209	 34.0	(90)	 69.0	(91)	 97.0	(92)	 34.0	(92)	 43.0	62.51	±43.14	
Louisville,KY-IN	4520	246	 26	  6	169	 30.0	(32)	 41.0	(91)	 56.0	(92)	 21.0	(31)	 40.5	51.10	±32.17	
Memphis,TN-AR-MS	4920	365	 16	  6	156	 23.0	(90)	 41.0	(91)	 49.0	(92)	 23.0	(92)	 32.0	39.30	±26.44	
Miami,FL	5000	365	  0	 13	 79	 30.0	(90)	 30.0	(91)	 23.0	(92)	 34.0	(92)	 30.0	30.46	±9.18	
Middlesex-Somerset-Hunterdon,NJ	5015	363	 29	  3	177	 25.5	(88)	 41.0	(91)	 48.5	(92)	 21.5	(92)	 30.0	41.16	±31.54	
Milwaukee-Waukesha,WI	5080	185	 12	 16	154	   . 	(.)	 39.0	(78)	 42.0	(92)	 24.0	(15)	 39.0	47.67	±27.12	
Minneapolis-St. Paul,MN-WI	5120	199	  2	  9	124	  9.0	(1)	 37.0	(91)	 36.0	(92)	 19.0	(15)	 36.0	37.60	±14.85	
Mobile,AL	5160	246	  1	 13	101	 34.5	(32)	 38.0	(91)	 37.0	(92)	 26.0	(31)	 35.0	38.18	±15.23	
Monmouth-Ocean,NJ	5190	243	 31	  5	207	 34.0	(21)	 42.0	(91)	 51.0	(92)	 27.0	(39)	 40.0	54.10	±38.52	
Nashville,TN	5360	365	 21	  5	159	 24.0	(90)	 43.0	(91)	 50.0	(92)	 21.5	(92)	 34.0	40.39	±26.45	
Nassau-Suffolk,NY	5380	365	 18	  3	202	 27.0	(90)	 39.0	(91)	 39.5	(92)	 24.0	(92)	 30.0	38.01	±27.00	
New Haven-Meriden,CT	5480	184	 24	 13	205	 31.0	(1)	 39.0	(91)	 40.5	(92)	   . 	(.)	 40.0	54.51	±37.18	
New London-Norwich,CT-RI	5520	181	  7	  9	202	 35.0	(1)	 36.0	(91)	 34.0	(89)	   . 	(.)	 35.0	42.22	±25.43	
New Orleans,LA	5560	365	  2	 13	124	 32.0	(90)	 37.0	(91)	 34.5	(92)	 29.0	(92)	 33.0	35.30	±14.35	
New York,NY	5600	365	 30	  2	190	 23.0	(90)	 41.0	(91)	 46.0	(92)	 21.0	(92)	 29.0	40.13	±32.67	
Newark,NJ	5640	365	 27	  9	203	 26.0	(90)	 41.0	(91)	 46.5	(92)	 23.0	(92)	 30.0	41.17	±30.77	
Norfolk-Virginia Beach-Newport News,VA_NC	5720	215	 15	 13	182	 29.0	(1)	 41.0	(91)	 45.0	(92)	 30.0	(31)	 41.0	49.57	±28.28	
Oakland,CA	5775	365	  6	  4	154	 27.0	(90)	 36.0	(91)	 38.0	(92)	 29.0	(92)	 32.0	34.50	±16.42	
Oklahoma City,OK	5880	365	  3	  3	116	 30.0	(90)	 40.0	(91)	 48.0	(92)	 24.0	(92)	 34.0	37.26	±17.93	
Omaha,NE-IA	5920	215	  0	  4	 74	 19.0	(1)	 37.0	(91)	 36.0	(92)	 20.0	(31)	 33.0	34.13	±11.98	
Orange County,CA	5945	365	  1	  8	122	 28.5	(90)	 39.0	(91)	 40.5	(92)	 29.5	(92)	 34.0	36.08	±13.93	
Orlando,FL	5960	365	  1	  7	111	 31.5	(90)	 41.0	(91)	 30.0	(92)	 31.5	(92)	 33.0	35.03	±13.30	
Philadelphia,PA-NJ	6160	365	 37	  5	203	 28.0	(90)	 46.0	(91)	 67.5	(92)	 23.0	(92)	 34.0	48.25	±39.04	
Phoenix-Mesa,AZ	6200	365	 14	 20	156	 39.0	(90)	 56.0	(91)	 59.0	(92)	 38.5	(92)	 45.0	52.28	±21.60	
Pittsburgh,PA	6280	365	 32	  2	174	 16.0	(90)	 43.0	(91)	 50.0	(92)	 17.5	(92)	 31.0	40.48	±33.50	
Portland,ME	6400	273	  5	  3	147	 33.0	(1)	 33.0	(91)	 30.0	(92)	 22.0	(89)	 29.0	33.19	±19.92	
Portland-Vancouver,OR-WA	6440	154	  1	 12	101	   . 	(.)	 30.0	(62)	 29.0	(92)	   . 	(.)	 30.0	31.22	±10.97	
Providence-Fall River-Warwick,RI-MA	6480	183	 14	 15	190	   . 	(.)	 41.0	(91)	 39.0	(92)	   . 	(.)	 41.0	50.29	±30.07	
Provo-Orem,UT	6520	154	  1	 20	101	   . 	(.)	 46.0	(62)	 46.0	(92)	   . 	(.)	 46.0	49.62	±15.79	
Raleigh-Durham-Chapel Hill,NC	6640	365	 29	  6	169	 26.0	(90)	 48.0	(91)	 59.0	(92)	 22.0	(92)	 33.0	44.20	±32.05	
Rapid City,SD	6660	145	  0	 21	 82	   . 	(.)	 42.0	(52)	 40.0	(92)	 21.0	(1)	 41.0	41.15	±9.70	
Reno,NV	6720	365	  0	 17	 92	 32.0	(90)	 41.0	(91)	 46.0	(92)	 33.0	(92)	 37.0	39.75	±11.62	
Richmond-Petersburg,VA	6760	215	 25	 14	201	 26.0	(1)	 45.0	(91)	 50.5	(92)	 26.0	(31)	 45.0	56.80	±35.01	
Riverside-San Bernardino,CA	6780	365	 97	 25	207	 39.0	(90)	 90.0	(91)	116.0	(92)	 38.0	(92)	 50.0	75.89	±48.42	
St, Louis,MO-IL	7040	365	 32	  5	187	 24.0	(90)	 41.0	(91)	 56.0	(92)	 20.0	(92)	 31.0	41.97	±33.76	
Salt Lake City-Ogden,UT	7160	154	  9	 29	129	   . 	(.)	 47.0	(62)	 46.5	(92)	   . 	(.)	 47.0	55.37	±21.51	
San Antonio,TX	7240	365	 17	  9	166	 34.5	(90)	 41.0	(91)	 37.0	(92)	 27.0	(92)	 34.0	40.89	±24.37	
San Diego,CA	7320	365	 13	 22	140	 38.0	(90)	 46.0	(91)	 49.0	(92)	 35.0	(92)	 42.0	47.44	±19.65	
Seattle-Bellevue-Everett,WA	7600	154	  0	 14	 97	   . 	(.)	 31.0	(62)	 30.0	(92)	   . 	(.)	 30.0	32.41	±12.52	
Shreveport-Bossier City,LA	7680	365	  0	  9	 90	 29.0	(90)	 37.0	(91)	 39.5	(92)	 26.0	(92)	 32.0	33.55	±13.30	
Sioux Falls,SD	7760	111	  0	 14	 59	   . 	(.)	 40.5	(38)	 34.0	(72)	 14.0	(1)	 35.0	35.44	±8.89	
Spokane,WA	7840	154	  0	 23	 77	   . 	(.)	 38.0	(62)	 37.5	(92)	   . 	(.)	 38.0	38.66	±8.09	
Springfield,MA	8000	364	 12	  5	185	 30.0	(89)	 38.0	(91)	 39.5	(92)	 26.0	(92)	 31.0	37.43	±23.48	
Tacoma,WA	8200	365	  0	  5	 74	 34.0	(90)	 36.0	(91)	 34.0	(92)	 32.5	(92)	 34.0	34.06	±7.84	
Tampa-St. Petersburg-Clearwater,FL	8280	365	  0	 10	 97	 35.0	(90)	 44.0	(91)	 34.0	(92)	 34.0	(92)	 36.0	37.90	±12.26	
Tucson,AZ	8520	365	  1	 18	114	 34.0	(90)	 44.0	(91)	 43.0	(92)	 34.0	(92)	 38.0	39.59	±10.67	
Tusla,OK	8560	365	  6	  3	137	 30.0	(90)	 40.0	(91)	 48.0	(92)	 26.5	(92)	 34.0	39.06	±20.09	
Washington,DC-MD-VA-WV	8840	365	 38	  5	204	 26.0	(90)	 48.0	(91)	 73.0	(92)	 20.0	(92)	 34.0	46.98	±37.71	
Wichita,KS	9040	365	  2	  5	111	 28.5	(90)	 41.0	(91)	 46.5	(92)	 20.5	(92)	 33.0	36.10	±17.00	
Wilmington-Newark,DE-MD	9160	365	 21	  4	201	 22.0	(90)	 41.0	(91)	 48.5	(92)	 18.5	(92)	 30.0	38.79	±31.60	
Wilmington,NC	9200	213	  1	  8	109	 21.0	(1)	 41.0	(91)	 37.0	(90)	 30.0	(31)	 38.0	38.64	±16.39