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	364	  2	 16	112	 45.0	(90)	 36.0	(91)	 36.0	(92)	 52.0	(91)	 42.0	44.02	±16.19	
Asheville,NC	 480	103	  2	  1	167	 32.0	(26)	 52.0	(23)	 54.0	(28)	 36.0	(26)	 40.0	43.15	±23.96	
Atlanta,GA	 520	364	 20	 16	165	 54.5	(90)	 57.0	(91)	 62.0	(91)	 49.0	(92)	 56.0	58.45	±24.45	
Augusta-Aiken,GA	 600	358	  1	  0	117	 36.0	(89)	 45.5	(90)	 52.0	(90)	 34.0	(89)	 42.0	43.53	±17.02	
Austin-San Marcos,TX	 640	365	  0	 10	 99	 34.5	(90)	 36.0	(91)	 33.0	(92)	 31.0	(92)	 33.0	36.39	±15.49	
Baltimore,MD	 720	357	 17	 13	147	 53.5	(84)	 55.0	(89)	 57.5	(92)	 45.5	(92)	 53.0	54.54	±24.34	
Baton Rouge,LA	 760	365	  2	 10	108	 43.0	(90)	 41.0	(91)	 48.0	(92)	 40.5	(92)	 43.0	45.18	±16.33	
Bergen-Passaic,NJ	 875	285	 14	 13	135	 56.0	(33)	 52.0	(70)	 62.0	(91)	 42.0	(91)	 54.0	54.78	±25.21	
Biloxi-Gulfport-Pascagoula,MS	 920	355	  1	 10	106	 39.0	(89)	 45.0	(87)	 42.0	(88)	 36.0	(91)	 39.0	41.39	±15.59	
Birmingham,AL	1000	365	 34	  9	162	 56.5	(90)	 59.0	(91)	 68.0	(92)	 57.5	(92)	 59.0	62.70	±24.88	
Bismarck,ND	1010	119	  0	  7	 64	 27.0	(29)	 22.0	(31)	 20.5	(28)	 18.0	(31)	 22.0	23.55	±12.31	
Boise City,ID	1080	365	 14	  0	157	 42.5	(90)	 16.0	(91)	 21.0	(92)	 30.5	(92)	 23.0	31.60	±25.27	
Boston,MA-NH	1120	348	  3	 10	133	 54.0	(90)	 47.0	(91)	 43.5	(86)	 40.0	(81)	 47.0	48.88	±19.17	
Burlington,VT	1305	202	  1	  3	102	 36.0	(30)	 26.0	(31)	 34.0	(50)	 29.0	(91)	 32.0	35.76	±19.73	
Charleston-North Charleston,SC	1440	361	  0	  6	 89	 43.0	(88)	 44.5	(90)	 42.0	(91)	 31.0	(92)	 39.0	40.78	±16.17	
Charleston,WV	1480	122	  5	 12	124	 52.0	(30)	 53.0	(31)	 63.0	(30)	 36.0	(31)	 53.0	53.20	±22.74	
Charlotte-Gastonia-Rock Hill,NC-SC	1520	364	  3	 16	116	 45.0	(90)	 52.0	(91)	 59.0	(91)	 43.5	(92)	 49.0	50.23	±17.37	
Cheyenne,WY	1580	107	  0	  4	 44	 17.0	(27)	 14.0	(23)	 18.0	(27)	 10.0	(30)	 15.0	16.23	±8.33	
Chicago,IL	1600	365	 19	 13	144	 72.0	(90)	 56.0	(91)	 54.0	(92)	 55.0	(92)	 58.0	58.35	±23.51	
Cincinnati,OH-KY-IN	1640	365	 14	 15	132	 55.0	(90)	 56.0	(91)	 60.5	(92)	 46.0	(92)	 55.0	55.82	±22.57	
Cleveland-Lorain-Elyria,OH	1680	364	 25	  7	155	 61.0	(90)	 63.5	(90)	 60.5	(92)	 52.0	(92)	 60.0	59.86	±25.36	
Columbia,SC	1760	346	  0	 16	 99	 44.0	(83)	 54.0	(91)	 57.0	(80)	 45.0	(92)	 49.5	50.37	±15.80	
Columbus,OH	1840	365	 12	 10	142	 56.5	(90)	 53.0	(91)	 57.5	(92)	 43.5	(92)	 53.0	53.41	±22.80	
Dallas,TX	1920	365	  0	  7	 99	 44.0	(90)	 44.0	(91)	 42.5	(92)	 37.0	(92)	 42.0	43.72	±15.97	
Denver,CO	2080	365	  7	 10	153	 53.0	(90)	 32.0	(91)	 32.0	(92)	 35.5	(92)	 36.0	39.68	±19.36	
Des Moines,IA	2120	364	  0	  6	 92	 39.0	(89)	 32.0	(91)	 36.0	(92)	 30.5	(92)	 35.0	37.87	±16.71	
Detroit,MI	2160	365	 20	  9	134	 61.5	(90)	 57.0	(91)	 52.5	(92)	 48.5	(92)	 56.0	55.77	±24.72	
Dover,DE	2190	134	  3	 11	130	 46.0	(31)	 44.5	(34)	 42.0	(32)	 31.0	(37)	 40.0	44.46	±22.28	
Fargo-Moorhead,ND-MN	2520	347	  0	  0	 93	 13.0	(85)	 15.0	(88)	 19.0	(92)	 19.0	(82)	 16.0	20.62	±14.90	
Fayetteville,NC	2560	338	  1	 16	110	 44.5	(64)	 60.0	(91)	 56.0	(92)	 39.0	(91)	 52.0	51.78	±17.87	
Fayetteville-Springdale-Rogers,AR	2580	 99	  0	  7	 75	 37.0	(17)	 36.0	(27)	 41.0	(25)	 23.0	(30)	 36.0	35.82	±15.69	
Fort Lauderdale,FL	2680	365	  1	  6	135	 32.0	(90)	 29.0	(91)	 26.0	(92)	 21.0	(92)	 26.0	30.37	±14.25	
Fort Wayne,IN	2760	120	  0	  7	 90	 55.0	(29)	 41.5	(30)	 38.0	(30)	 39.0	(31)	 42.5	44.36	±20.04	
Fort Worth-Arlington,TX	2800	365	  0	  7	 91	 43.0	(90)	 40.0	(91)	 39.5	(92)	 33.5	(92)	 39.0	40.68	±15.64	
Gary,IN	2960	365	 25	 16	153	 73.5	(90)	 53.0	(91)	 52.0	(92)	 46.5	(92)	 55.0	58.05	±25.15	
Grand Rapids-Muskegon-Holland,MI	3000	365	  9	 10	115	 55.0	(90)	 41.0	(91)	 43.5	(92)	 38.0	(92)	 44.0	45.42	±23.25	
Greensboro-Winston Salem-High Point,NC	3120	365	  4	 13	119	 41.5	(90)	 56.0	(91)	 59.0	(92)	 41.0	(92)	 49.0	50.30	±18.53	
Greenville-Spartanburg-Anderson,SC	3160	364	  3	 17	145	 44.5	(90)	 55.0	(91)	 58.0	(92)	 52.0	(91)	 52.0	51.81	±17.69	
Hartford,CN	3280	362	  2	  6	103	 39.0	(87)	 30.0	(91)	 36.0	(92)	 36.0	(92)	 36.0	39.92	±20.03	
Honolulu,HI	3320	364	  2	  5	197	 15.0	(89)	 11.0	(91)	 11.0	(92)	 15.0	(92)	 13.0	15.55	±14.18	
Houston,TX	3360	365	  4	  6	127	 45.0	(90)	 47.0	(91)	 43.5	(92)	 43.5	(92)	 45.0	46.22	±16.89	
Huntington-Ashland,WV-KY-OH	3400	127	  5	 13	134	 50.5	(30)	 57.5	(32)	 61.5	(32)	 42.0	(33)	 54.0	54.77	±23.48	
Indianapolis,IN	3480	365	  8	 10	154	 59.0	(90)	 54.0	(91)	 56.0	(92)	 49.0	(92)	 56.0	54.82	±22.16	
Jackson,MS	3560	119	  0	 15	100	 47.0	(29)	 43.0	(30)	 45.5	(30)	 48.0	(30)	 46.0	45.70	±17.55	
Jacksonville,FL	3600	358	  3	  8	130	 37.5	(88)	 35.0	(91)	 34.0	(89)	 28.0	(90)	 33.5	36.24	±17.07	
Jacksonville,NC	3605	114	  0	  1	 96	 35.5	(28)	 40.0	(31)	 36.0	(24)	 25.0	(31)	 33.0	35.83	±16.87	
Jersey City,NJ	3640	115	  2	  6	125	 53.0	(25)	 39.0	(30)	 55.0	(29)	 42.0	(31)	 48.0	47.83	±24.04	
Kansas City,MO-KS	3760	364	  4	 12	147	 53.0	(89)	 52.0	(91)	 52.5	(92)	 44.0	(92)	 51.0	49.40	±19.54	
Knoxville,TN	3840	362	 10	 11	163	 47.5	(90)	 54.5	(90)	 61.5	(90)	 48.5	(92)	 55.0	54.19	±23.42	
Lafayette,LA	3880	122	  0	  8	 88	 34.0	(30)	 32.0	(31)	 30.5	(30)	 35.0	(31)	 33.5	37.20	±17.66	
Las Cruces,NM	4100	365	 11	  3	215	 24.5	(90)	 42.0	(91)	 23.0	(92)	 42.0	(92)	 32.0	37.98	±26.27	
Las Vegas,NV-AZ	4120	353	  3	  7	132	 26.0	(89)	 28.0	(87)	 29.0	(89)	 40.5	(88)	 30.0	33.90	±17.19	
Lexington,KY	4280	125	  3	 13	121	 53.0	(31)	 50.0	(31)	 59.0	(30)	 40.0	(33)	 48.0	50.71	±20.11	
Lincoln,NE	4360	105	  0	  6	 82	 44.0	(27)	 28.0	(23)	 33.0	(24)	 21.0	(31)	 30.0	32.31	±15.32	
Little Rock-North Little Rock,AR	4400	362	  1	  6	106	 47.0	(89)	 45.0	(91)	 57.0	(90)	 42.0	(92)	 49.0	48.34	±19.30	
Los Angeles-Long Beach,CA	4480	364	 91	 16	173	 81.0	(89)	 69.0	(91)	 70.5	(92)	 94.0	(92)	 74.0	80.87	±33.03	
Louisville,KY-IN	4520	363	 15	 13	141	 55.0	(89)	 55.0	(91)	 69.0	(92)	 44.0	(91)	 55.0	56.02	±23.02	
Memphis,TN-AR-MS	4920	364	  4	  9	154	 49.0	(89)	 46.0	(91)	 49.5	(92)	 40.0	(92)	 47.0	47.20	±19.90	
Miami,FL	5000	359	  0	 11	 96	 34.0	(88)	 31.0	(91)	 29.0	(88)	 27.0	(92)	 31.0	32.69	±12.48	
Middlesex-Somerset-Hunterdon,NJ	5015	324	  5	 10	131	 33.0	(72)	 38.0	(90)	 45.0	(89)	 31.0	(73)	 36.0	41.20	±21.35	
Milwaukee-Waukesha,WI	5080	365	 11	  6	161	 59.0	(90)	 41.0	(91)	 39.0	(92)	 37.5	(92)	 44.0	47.58	±24.93	
Minneapolis-St. Paul,MN-WI	5120	365	  4	  3	118	 44.5	(90)	 41.0	(91)	 36.0	(92)	 37.5	(92)	 40.0	42.43	±20.62	
Mobile,AL	5160	122	  0	 16	 98	 38.5	(30)	 40.0	(31)	 41.0	(30)	 35.0	(31)	 39.0	42.14	±16.06	
Monmouth-Ocean,NJ	5190	 87	  1	  5	107	 42.0	(9)	 30.5	(20)	 34.0	(27)	 26.0	(31)	 31.0	33.87	±21.16	
Nashville,TN	5360	363	  0	 10	 97	 47.5	(88)	 53.0	(91)	 56.0	(92)	 42.0	(92)	 49.0	49.58	±18.52	
Nassau-Suffolk,NY	5380	365	  6	 13	124	 39.0	(90)	 36.0	(91)	 42.0	(92)	 37.5	(92)	 39.0	44.15	±20.36	
New Haven-Meriden,CT	5480	343	  7	  2	136	 55.0	(82)	 41.0	(88)	 49.0	(87)	 51.5	(86)	 51.0	50.40	±21.98	
New London-Norwich,CT-RI	5520	102	  1	  7	107	 39.0	(29)	 34.0	(20)	 39.0	(29)	 33.0	(24)	 36.0	39.09	±20.19	
New Orleans,LA	5560	350	  1	 11	103	 40.5	(86)	 41.0	(83)	 41.0	(92)	 35.0	(89)	 40.0	42.19	±16.63	
New York,NY	5600	365	 25	 19	144	 59.5	(90)	 54.0	(91)	 58.0	(92)	 55.5	(92)	 56.0	60.62	±23.19	
Newark,NJ	5640	364	 11	 13	135	 52.0	(89)	 49.0	(91)	 56.0	(92)	 47.0	(92)	 52.0	51.74	±23.14	
Norfolk-Virginia Beach-Newport News,VA_N	5720	364	  3	 16	120	 42.0	(90)	 49.0	(91)	 42.0	(91)	 39.0	(92)	 42.0	44.18	±17.59	
Oakland,CA	5775	212	 10	  4	175	 33.0	(82)	 26.0	(20)	 31.0	(18)	 56.0	(92)	 41.5	46.57	±27.91	
Oklahoma City,OK	5880	356	  0	  7	 93	 40.0	(89)	 33.0	(88)	 33.0	(92)	 23.0	(87)	 33.0	35.90	±16.96	
Omaha,NE-IA	5920	355	  3	  6	122	 52.0	(87)	 29.0	(87)	 33.5	(90)	 29.0	(91)	 34.0	37.86	±17.93	
Orange County,CA	5945	277	 29	 12	154	 57.5	(80)	 49.5	(70)	 49.0	(39)	 71.0	(88)	 57.0	60.81	±28.30	
Orlando,FL	5960	365	  3	 10	140	 39.0	(90)	 45.0	(91)	 39.0	(92)	 26.5	(92)	 36.0	39.18	±16.36	
Philadelphia,PA-NJ	6160	365	 18	 13	289	 61.0	(90)	 52.0	(91)	 54.5	(92)	 49.0	(92)	 53.0	54.66	±27.25	
Phoenix-Mesa,AZ	6200	363	  4	 13	146	 39.0	(89)	 28.0	(90)	 26.0	(92)	 45.0	(92)	 31.0	37.61	±19.12	
Pittsburgh,PA	6280	365	 54	 13	170	 54.5	(90)	 64.0	(91)	 74.0	(92)	 60.5	(92)	 62.0	66.19	±32.09	
Pocatello,ID	6340	346	  7	  5	122	 45.5	(84)	 17.0	(86)	 21.0	(88)	 20.5	(88)	 22.0	29.91	±23.10	
Portland,ME	6400	352	  1	  0	101	 36.0	(85)	 26.0	(83)	 26.0	(92)	 26.0	(92)	 27.0	31.71	±19.37	
Portland-Vancouver,OR-WA	6440	365	  3	  6	127	 42.0	(90)	 26.0	(91)	 25.5	(92)	 37.0	(92)	 31.0	35.96	±18.83	
Providence-Fall River-Warwick,RI-MA	6480	363	  2	  9	110	 41.0	(88)	 30.0	(91)	 36.0	(92)	 37.0	(92)	 36.0	40.20	±19.39	
Provo-Orem,UT	6520	356	 20	  7	161	 38.0	(89)	 20.0	(91)	 24.5	(92)	 32.0	(84)	 26.0	35.86	±29.39	
Raleigh-Durham-Chapel Hill,NC	6640	365	  3	 14	118	 42.0	(90)	 58.0	(91)	 57.5	(92)	 42.0	(92)	 52.0	50.89	±18.41	
Rapid City,SD	6660	261	  0	 10	 93	 31.0	(30)	 22.5	(90)	 26.0	(85)	 26.0	(56)	 26.0	27.25	±11.32	
Reno,NV	6720	128	  3	  3	171	 29.0	(31)	 27.0	(32)	 28.0	(31)	 29.5	(34)	 28.0	34.39	±23.63	
Richmond-Petersburg,VA	6760	365	  4	 10	126	 45.0	(90)	 54.0	(91)	 53.0	(92)	 39.5	(92)	 49.0	49.53	±19.13	
Riverside-San Bernardino,CA	6780	333	 98	 11	170	 65.0	(81)	 76.5	(84)	 79.0	(81)	 89.0	(87)	 78.0	82.72	±36.28	
St, Louis,MO-IL	7040	365	 13	 14	143	 66.0	(90)	 53.0	(91)	 57.5	(92)	 47.5	(92)	 56.0	57.22	±21.88	
Salt Lake City-Ogden,UT	7160	346	 23	  7	160	 42.5	(90)	 21.0	(85)	 26.5	(86)	 42.0	(85)	 30.0	39.93	±31.52	
San Antonio,TX	7240	365	  0	  3	 80	 31.5	(90)	 31.0	(91)	 26.0	(92)	 26.0	(92)	 29.0	31.80	±14.02	
San Diego,CA	7320	365	 14	 16	139	 61.5	(90)	 52.0	(91)	 50.0	(92)	 66.5	(92)	 56.0	57.81	±21.10	
Santa Fe,NM	7490	120	  0	  5	 37	 17.5	(30)	 14.0	(30)	 13.0	(29)	 14.0	(31)	 14.5	15.90	±5.67	
Seattle-Bellevue-Everett,WA	7600	365	  6	 16	118	 56.0	(90)	 32.0	(91)	 39.0	(92)	 42.0	(92)	 39.0	44.95	±18.68	
Shreveport-Bossier City,LA	7680	364	  0	  3	 90	 26.0	(90)	 37.0	(90)	 41.5	(92)	 29.5	(92)	 32.0	35.55	±17.74	
Sioux Falls,SD	7760	123	  0	 12	 90	 38.0	(32)	 28.0	(31)	 31.5	(30)	 28.0	(30)	 30.0	34.24	±14.44	
Spokane,WA	7840	362	  0	  3	 97	 45.5	(90)	 29.0	(91)	 31.0	(89)	 34.0	(92)	 32.0	36.52	±16.60	
Springfield,MA	8000	344	  4	  6	147	 44.0	(77)	 34.5	(88)	 38.5	(90)	 42.0	(89)	 40.0	43.46	±21.67	
Tacoma,WA	8200	365	 12	 13	139	 55.0	(90)	 29.0	(91)	 32.5	(92)	 41.5	(92)	 36.0	42.28	±22.78	
Tampa-St. Petersburg-Clearwater,FL	8280	363	  1	  6	223	 45.0	(90)	 44.0	(91)	 43.5	(90)	 32.5	(92)	 41.0	43.05	±17.75	
Topeka,KS	8440	175	  0	  8	 70	 32.5	(84)	 30.0	(30)	 33.5	(30)	 22.0	(31)	 31.0	33.31	±13.80	
Tucson,AZ	8520	112	  0	  8	 62	 21.0	(24)	 19.5	(20)	 21.0	(23)	 32.0	(45)	 23.0	26.83	±12.41	
Tusla,OK	8560	362	  1	  7	102	 45.5	(90)	 41.0	(90)	 42.0	(91)	 34.0	(91)	 41.0	43.21	±18.60	
Washington,DC-MD-VA-WV	8840	363	 13	 14	131	 52.0	(90)	 55.0	(90)	 57.0	(91)	 52.0	(92)	 53.0	54.14	±22.63	
Wichita,KS	9040	122	  0	 10	 77	 49.5	(30)	 34.0	(31)	 34.5	(30)	 27.0	(31)	 36.0	37.20	±15.96	
Wilmington-Newark,DE-MD	9160	365	 18	 15	139	 59.5	(90)	 54.0	(91)	 56.5	(92)	 51.5	(92)	 54.0	56.74	±23.12	
Wilmington,NC	9200	115	  0	  9	 78	 35.0	(29)	 41.0	(28)	 35.0	(29)	 25.0	(29)	 33.0	36.10	±15.95