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	  1	 20	101	 35.0	(90)	 47.0	(91)	 48.0	(92)	 32.0	(92)	 41.0	41.44	±11.33	
Asheville,NC	 480	211	  1	 10	101	 16.0	(1)	 41.0	(87)	 40.0	(92)	 33.0	(31)	 39.0	39.75	±13.96	
Atlanta,GA	 520	246	 18	 13	174	 35.0	(32)	 47.0	(91)	 50.5	(92)	 32.0	(31)	 43.0	52.81	±27.75	
Augusta-Aiken,GA	 600	365	  4	  7	150	 29.0	(90)	 45.0	(91)	 45.0	(92)	 29.5	(92)	 36.0	40.90	±19.74	
Austin-San Marcos,TX	 640	365	  1	  3	101	 27.0	(90)	 36.0	(91)	 35.5	(92)	 28.0	(92)	 31.0	33.21	±13.76	
Baltimore,MD	 720	365	 26	  2	203	 24.5	(90)	 46.0	(91)	 48.5	(92)	 23.0	(92)	 34.0	43.30	±33.11	
Baton Rouge,LA	 760	365	  5	  9	151	 30.0	(90)	 43.0	(91)	 41.0	(92)	 30.0	(92)	 34.0	38.75	±19.10	
Bergen-Passaic,NJ	 875	365	 14	  2	177	 22.5	(90)	 41.0	(91)	 44.0	(92)	 19.5	(92)	 29.0	35.14	±26.13	
Biloxi-Gulfport-Pascagoula,MS	 920	246	  3	  9	116	 38.0	(32)	 41.0	(91)	 39.5	(92)	 33.0	(31)	 39.0	41.33	±17.68	
Birmingham,AL	1000	365	 12	  2	156	 21.0	(90)	 41.0	(91)	 41.5	(92)	 23.0	(92)	 33.0	37.33	±24.36	
Boise City,ID	1080	175	  1	  9	104	 39.0	(52)	 38.0	(92)	 27.0	(31)	   . 	(.)	 37.0	37.21	±13.25	
Boston,MA-NH	1120	365	 16	  2	182	 16.0	(90)	 40.0	(91)	 39.0	(92)	 20.0	(92)	 27.0	33.40	±25.90	
Charleston-North Charleston,SC	1440	365	  0	  9	 74	 27.0	(90)	 40.0	(91)	 34.0	(92)	 30.0	(92)	 32.0	33.35	±11.02	
Charleston,WV	1480	215	  1	  2	111	  2.0	(1)	 42.0	(91)	 41.5	(92)	 27.0	(31)	 41.0	41.68	±17.75	
Charlotte-Gastonia-Rock Hill,NC-SC	1520	224	 26	 22	195	 32.0	(5)	 50.0	(91)	 59.0	(92)	 34.0	(36)	 48.5	59.31	±31.01	
Chicago,IL	1600	365	 16	  5	147	 26.0	(90)	 41.0	(91)	 41.0	(92)	 21.0	(92)	 31.0	36.61	±22.32	
Cincinnati,OH-KY-IN	1640	246	 12	  9	151	 29.0	(32)	 42.0	(91)	 44.5	(92)	 28.0	(31)	 40.0	46.55	±23.64	
Cleveland-Lorain-Elyria,OH	1680	215	 24	 19	151	 27.0	(1)	 44.0	(91)	 47.0	(92)	 28.0	(31)	 41.0	54.44	±31.08	
Columbia,SC	1760	365	  7	  6	132	 28.5	(90)	 47.0	(91)	 44.0	(92)	 29.0	(92)	 36.0	41.59	±20.92	
Columbus,OH	1840	215	  9	 14	145	 23.0	(1)	 46.0	(91)	 44.5	(92)	 30.0	(31)	 44.0	49.62	±23.25	
Dallas,TX	1920	365	 24	 11	169	 29.5	(90)	 44.0	(91)	 53.5	(92)	 30.0	(92)	 37.0	45.11	±27.19	
Denver,CO	2080	365	  2	 10	114	 30.0	(90)	 43.0	(91)	 48.0	(92)	 30.0	(92)	 35.0	39.00	±15.93	
Des Moines,IA	2120	215	  0	  7	 61	  7.0	(1)	 32.0	(91)	 30.0	(92)	 24.0	(31)	 30.0	30.44	±8.42	
Detroit,MI	2160	184	 16	 15	151	 33.0	(1)	 39.0	(91)	 41.0	(92)	   . 	(.)	 40.0	48.90	±28.63	
Dover,DE	2190	229	  8	 16	161	 33.0	(13)	 41.0	(91)	 41.0	(92)	 29.0	(33)	 38.0	43.83	±22.15	
Fargo-Moorhead,ND-MN	2520	365	  0	  6	 49	 29.5	(90)	 35.0	(91)	 30.0	(92)	 20.5	(92)	 29.0	28.58	±8.69	
Fayetteville,NC	2560	215	  4	 16	116	 16.0	(1)	 48.0	(91)	 44.5	(92)	 33.0	(31)	 44.0	49.67	±20.70	
Fort Lauderdale,FL	2680	365	  2	 11	135	 29.0	(90)	 32.0	(91)	 19.0	(92)	 27.5	(92)	 27.0	28.67	±12.43	
Fort Wayne,IN	2760	184	  3	 11	122	 28.0	(1)	 41.0	(91)	 39.5	(92)	   . 	(.)	 41.0	44.52	±17.68	
Fort Worth-Arlington,TX	2800	365	 25	  8	201	 30.0	(90)	 44.0	(91)	 49.5	(92)	 32.5	(92)	 36.0	45.56	±28.00	
Gary,IN	2960	184	 10	 14	132	 23.0	(1)	 41.0	(91)	 41.0	(92)	   . 	(.)	 41.0	48.07	±23.69	
Grand Rapids-Muskegon-Holland,MI	3000	184	 11	 13	145	 27.0	(1)	 40.0	(91)	 37.5	(92)	   . 	(.)	 39.0	47.72	±26.48	
Greensboro-Winston Salem-High Point,NC	3120	215	 20	 15	150	 15.0	(1)	 48.0	(91)	 50.0	(92)	 33.0	(31)	 48.0	55.45	±27.22	
Greenville-Spartanburg-Anderson,SC	3160	365	 13	  2	135	 27.0	(90)	 47.0	(91)	 48.0	(92)	 29.0	(92)	 38.0	41.36	±22.40	
Hartford,CN	3280	358	 16	  2	195	 26.5	(90)	 41.0	(91)	 41.5	(92)	 16.0	(85)	 31.0	35.92	±29.13	
Honolulu,HI	3320	360	  0	  4	 36	 22.0	(86)	 19.5	(90)	 12.0	(92)	 21.0	(92)	 18.5	18.41	±6.67	
Houston,TX	3360	365	 37	  3	206	 30.0	(90)	 43.0	(91)	 47.0	(92)	 33.5	(92)	 38.0	48.49	±36.12	
Huntington-Ashland,WV-KY-OH	3400	246	 11	  9	127	 31.5	(32)	 47.0	(91)	 46.5	(92)	 34.0	(31)	 43.5	48.91	±22.01	
Indianapolis,IN	3480	184	 10	 18	147	 30.0	(1)	 45.0	(91)	 45.0	(92)	   . 	(.)	 45.0	55.48	±25.62	
Jackson,MS	3560	246	  0	  9	 92	 35.5	(32)	 41.0	(91)	 38.0	(92)	 30.0	(31)	 38.0	39.72	±14.31	
Jacksonville,FL	3600	363	  0	  9	 97	 29.0	(90)	 41.0	(91)	 32.5	(90)	 28.0	(92)	 31.0	32.55	±12.19	
Jersey City,NJ	3640	362	  6	  2	179	 20.0	(90)	 34.0	(91)	 38.0	(92)	 14.0	(89)	 25.0	29.41	±22.50	
Kansas City,MO-KS	3760	365	  4	  2	119	 22.5	(90)	 43.0	(91)	 46.0	(92)	 22.5	(92)	 31.0	35.90	±19.96	
Knoxville,TN	3840	365	 17	 23	147	 39.0	(90)	 59.0	(91)	 59.0	(92)	 38.0	(92)	 45.0	53.66	±22.38	
Lafayette,LA	3880	365	  1	  3	101	 27.0	(90)	 36.0	(91)	 32.0	(92)	 26.0	(92)	 29.0	31.25	±14.07	
Las Cruces,NM	4100	365	  1	 17	122	 35.0	(90)	 47.0	(91)	 47.0	(92)	 32.0	(92)	 40.0	41.77	±12.59	
Las Vegas,NV-AZ	4120	365	  2	 16	119	 34.0	(90)	 51.0	(91)	 50.0	(92)	 31.0	(92)	 41.0	45.70	±17.80	
Lexington,KY	4280	246	  1	  6	116	 29.0	(32)	 42.0	(91)	 41.5	(92)	 30.0	(31)	 40.0	40.35	±14.23	
Lincoln,NE	4360	204	  0	  7	 48	 28.0	(2)	 30.0	(91)	 27.5	(80)	 23.0	(31)	 28.0	27.82	±7.06	
Little Rock-North Little Rock,AR	4400	365	  4	  2	109	 26.0	(90)	 40.0	(91)	 43.5	(92)	 26.0	(92)	 34.0	36.94	±18.10	
Los Angeles-Long Beach,CA	4480	365	 42	 12	205	 30.0	(90)	 61.0	(91)	 79.0	(92)	 30.0	(92)	 45.0	57.03	±37.03	
Louisville,KY-IN	4520	246	 10	 14	140	 30.0	(32)	 46.0	(91)	 48.5	(92)	 28.0	(31)	 42.0	48.40	±22.75	
Memphis,TN-AR-MS	4920	365	 13	  3	174	 24.5	(90)	 44.0	(91)	 48.5	(92)	 26.0	(92)	 35.0	40.93	±24.96	
Miami,FL	5000	365	  1	 16	132	 31.5	(90)	 33.0	(91)	 24.0	(92)	 33.0	(92)	 30.0	32.14	±11.17	
Middlesex-Somerset-Hunterdon,NJ	5015	365	 21	  2	190	 23.0	(90)	 41.0	(91)	 45.0	(92)	 22.0	(92)	 31.0	38.71	±28.27	
Milwaukee-Waukesha,WI	5080	185	 12	 14	185	 42.0	(78)	 39.0	(92)	 29.0	(15)	   . 	(.)	 39.0	46.89	±28.07	
Minneapolis-St. Paul,MN-WI	5120	201	  3	  3	145	 20.0	(1)	 38.0	(91)	 36.0	(92)	 29.0	(17)	 36.0	39.18	±17.32	
Mobile,AL	5160	246	  2	 13	111	 38.0	(32)	 40.0	(91)	 35.0	(92)	 31.0	(31)	 37.0	39.19	±16.20	
Monmouth-Ocean,NJ	5190	235	 21	 20	195	 34.0	(16)	 44.0	(91)	 46.0	(92)	 33.5	(36)	 41.0	51.71	±31.27	
Nashville,TN	5360	365	  7	  4	147	 23.5	(90)	 45.0	(91)	 48.0	(92)	 25.0	(92)	 37.0	39.81	±22.49	
Nassau-Suffolk,NY	5380	365	  9	  6	182	 26.5	(90)	 38.0	(91)	 38.0	(92)	 23.0	(92)	 31.0	35.01	±22.70	
New Haven-Meriden,CT	5480	184	 13	 18	204	 29.0	(1)	 41.0	(91)	 39.5	(92)	   . 	(.)	 40.5	49.01	±29.65	
New London-Norwich,CT-RI	5520	182	  7	 19	137	 29.0	(1)	 39.0	(90)	 38.0	(91)	   . 	(.)	 38.0	43.82	±20.33	
New Orleans,LA	5560	365	  5	 12	124	 30.0	(90)	 41.0	(91)	 41.5	(92)	 32.0	(92)	 35.0	38.52	±18.19	
New York,NY	5600	365	 20	  4	169	 24.0	(90)	 42.0	(91)	 45.5	(92)	 20.0	(92)	 32.0	38.74	±27.59	
Newark,NJ	5640	365	 13	  3	159	 27.0	(90)	 41.0	(91)	 43.0	(92)	 22.0	(92)	 31.0	37.58	±24.55	
Norfolk-Virginia Beach-Newport News,VA_N	5720	215	  6	 19	159	 20.0	(1)	 44.0	(91)	 41.0	(92)	 31.0	(31)	 41.0	45.11	±19.22	
Oakland,CA	5775	365	  4	  9	145	 27.0	(90)	 39.0	(91)	 32.0	(92)	 26.0	(92)	 30.0	33.61	±15.64	
Oklahoma City,OK	5880	365	  2	  5	116	 26.5	(90)	 43.0	(91)	 49.0	(92)	 27.0	(92)	 35.0	39.52	±18.84	
Omaha,NE-IA	5920	216	  0	 13	 61	 30.5	(2)	 31.0	(91)	 31.5	(92)	 24.0	(31)	 31.0	31.30	±9.18	
Orange County,CA	5945	365	  4	  8	132	 28.0	(90)	 40.0	(91)	 38.0	(92)	 26.0	(92)	 34.0	36.07	±16.09	
Orlando,FL	5960	365	  3	 11	106	 32.5	(90)	 41.0	(91)	 34.0	(92)	 29.5	(92)	 34.0	36.09	±14.54	
Philadelphia,PA-NJ	6160	365	 30	  4	187	 26.5	(90)	 47.0	(91)	 54.0	(92)	 24.0	(92)	 35.0	44.55	±32.28	
Phoenix-Mesa,AZ	6200	365	 12	 23	137	 36.0	(90)	 61.0	(91)	 56.0	(92)	 36.5	(92)	 46.0	50.99	±20.07	
Pittsburgh,PA	6280	364	 20	  2	150	 15.0	(89)	 47.0	(91)	 48.5	(92)	 18.0	(92)	 32.5	38.27	±29.61	
Portland,ME	6400	180	  8	 16	151	 34.0	(88)	 33.5	(92)	   . 	(.)	   . 	(.)	 34.0	40.02	±23.20	
Portland-Vancouver,OR-WA	6440	154	  0	 13	 90	 33.0	(62)	 27.0	(92)	   . 	(.)	   . 	(.)	 29.0	30.59	±10.89	
Providence-Fall River-Warwick,RI-MA	6480	184	 13	 17	197	 25.0	(1)	 38.0	(91)	 38.0	(92)	   . 	(.)	 38.0	47.98	±30.26	
Provo-Orem,UT	6520	154	  0	 27	 92	 46.0	(62)	 45.0	(92)	   . 	(.)	   . 	(.)	 45.0	48.47	±11.69	
Raleigh-Durham-Chapel Hill,NC	6640	362	  9	  5	137	 23.0	(90)	 54.0	(91)	 50.0	(92)	 26.0	(89)	 34.0	42.52	±24.49	
Reno,NV	6720	365	  0	 14	 92	 31.0	(90)	 44.0	(91)	 45.0	(92)	 31.0	(92)	 37.0	38.49	±10.90	
Richmond-Petersburg,VA	6760	215	 14	 18	159	 19.0	(1)	 46.0	(91)	 45.0	(92)	 30.0	(31)	 43.0	49.60	±24.86	
Riverside-San Bernardino,CA	6780	365	 94	 22	209	 36.5	(90)	101.0	(91)	102.5	(92)	 37.0	(92)	 54.0	75.33	±48.44	
St, Louis,MO-IL	7040	365	 14	  4	137	 24.0	(90)	 43.0	(91)	 48.5	(92)	 23.0	(92)	 32.0	38.91	±24.25	
Salt Lake City-Ogden,UT	7160	154	  6	 28	161	 48.0	(62)	 49.0	(92)	   . 	(.)	   . 	(.)	 48.0	55.29	±21.12	
San Antonio,TX	7240	365	  1	  7	114	 30.0	(90)	 37.0	(91)	 37.5	(92)	 32.0	(92)	 34.0	36.25	±13.99	
San Diego,CA	7320	365	 17	 22	179	 35.0	(90)	 48.0	(91)	 49.5	(92)	 36.0	(92)	 41.0	49.14	±22.82	
Seattle-Bellevue-Everett,WA	7600	154	  1	  9	114	 32.0	(62)	 24.5	(92)	   . 	(.)	   . 	(.)	 28.0	29.81	±12.53	
Shreveport-Bossier City,LA	7680	365	  3	  9	119	 29.0	(90)	 39.0	(91)	 41.0	(92)	 29.0	(92)	 34.0	37.60	±17.70	
Sioux Falls,SD	7760	352	  0	  9	 82	 28.0	(89)	 35.0	(82)	 38.0	(89)	 24.0	(92)	 30.5	31.74	±9.50	
Spokane,WA	7840	154	  0	 23	 87	 38.0	(62)	 38.5	(92)	   . 	(.)	   . 	(.)	 38.0	39.79	±9.61	
Springfield,MA	8000	365	 13	  2	187	 30.5	(90)	 42.0	(91)	 39.5	(92)	 24.0	(92)	 33.0	37.75	±22.60	
Tacoma,WA	8200	365	  0	 13	 92	 33.0	(90)	 38.0	(91)	 32.5	(92)	 32.0	(92)	 33.0	34.17	±8.19	
Tampa-St. Petersburg-Clearwater,FL	8280	365	  6	 13	151	 34.0	(90)	 44.0	(91)	 36.0	(92)	 33.0	(92)	 35.0	40.10	±18.23	
Tucson,AZ	8520	365	  0	 21	 77	 34.0	(90)	 45.0	(91)	 41.0	(92)	 31.0	(92)	 37.0	38.22	±8.82	
Tusla,OK	8560	365	  7	  5	164	 27.0	(90)	 41.0	(91)	 56.0	(92)	 30.0	(92)	 38.0	42.18	±21.63	
Washington,DC-MD-VA-WV	8840	365	 23	  2	166	 24.5	(90)	 48.0	(91)	 48.0	(92)	 24.0	(92)	 35.0	42.98	±29.95	
Wichita,KS	9040	365	  3	  4	124	 27.0	(90)	 39.0	(91)	 48.5	(92)	 29.0	(92)	 35.0	38.59	±18.08	
Wilmington-Newark,DE-MD	9160	365	 20	  3	179	 23.0	(90)	 43.0	(91)	 45.5	(92)	 21.5	(92)	 31.0	38.65	±28.51	
Wilmington,NC	9200	215	  0	 16	 90	 21.0	(1)	 42.0	(91)	 34.0	(92)	 31.0	(31)	 38.0	39.36	±13.66