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	
Atlanta,GA	 520	366	  0	  1	 26	  4.0	(91)	  4.0	(91)	  4.0	(92)	  4.0	(92)	  4.0	 5.25	±4.23	
Augusta-Aiken,GA	 600	150	  0	  1	 15	  3.0	(48)	  1.0	(79)	  1.0	(23)	   . 	(.)	  1.0	 2.31	±2.09	
Austin-San Marcos,TX	 640	152	  0	  1	  4	   . 	(.)	  1.0	(46)	  1.0	(79)	  1.0	(27)	  1.0	 1.27	±0.75	
Baltimore,MD	 720	366	  0	  1	 29	 10.0	(91)	  4.0	(91)	  4.0	(92)	  7.0	(92)	  6.0	 7.51	±5.05	
Baton Rouge,LA	 760	366	  0	  1	 69	  9.0	(91)	  6.0	(91)	  9.0	(92)	 10.0	(92)	  9.0	10.96	±8.73	
Bergen-Passaic,NJ	 875	351	  0	  1	 31	  9.0	(90)	  4.0	(90)	  4.0	(83)	  4.0	(88)	  4.0	 6.19	±4.84	
Biloxi-Gulfport-Pascagoula,MS	 920	359	  0	  1	 19	  3.0	(91)	  3.0	(91)	  3.0	(85)	  6.0	(92)	  4.0	 4.09	±2.85	
Birmingham,AL	1000	365	  0	  1	 28	  4.0	(91)	  3.0	(91)	  3.0	(91)	  3.0	(92)	  3.0	 3.85	±3.17	
Bismarck,ND	1010	366	  0	  1	 60	 10.0	(91)	  9.0	(91)	  6.0	(92)	  6.0	(92)	  7.0	10.54	±10.87	
Boston,MA-NH	1120	366	  0	  4	 58	 15.0	(91)	  6.0	(91)	  6.0	(92)	  9.0	(92)	  7.0	 9.87	±6.49	
Burlington,VT	1305	360	  0	  1	 19	  4.0	(88)	  4.0	(90)	  1.0	(90)	  4.0	(92)	  4.0	 3.37	±2.32	
Charleston-North Charleston,SC	1440	366	  0	  1	 31	  6.0	(91)	  1.0	(91)	  3.0	(92)	  4.0	(92)	  3.0	 4.08	±3.65	
Charleston,WV	1480	364	  0	  1	 63	 12.0	(89)	  9.0	(91)	 14.0	(92)	 18.0	(92)	 13.0	14.90	±9.31	
Charlotte-Gastonia-Rock Hill,NC-SC	1520	364	  0	  1	 19	  6.0	(89)	  3.0	(91)	  3.0	(92)	  3.0	(92)	  3.0	 4.46	±3.71	
Chicago,IL	1600	366	  0	  4	 71	 15.0	(91)	 13.0	(91)	 12.0	(92)	 12.0	(92)	 13.0	15.01	±9.03	
Cincinnati,OH-KY-IN	1640	366	  0	  1	 64	 18.0	(91)	 16.0	(91)	 14.0	(92)	 14.0	(92)	 15.0	18.17	±12.76	
Cleveland-Lorain-Elyria,OH	1680	366	  0	  1	 73	 15.0	(91)	 12.0	(91)	 13.0	(92)	 12.0	(92)	 13.0	15.49	±10.23	
Columbia,SC	1760	366	  0	  1	 28	  7.0	(91)	  6.0	(91)	  3.0	(92)	  4.0	(92)	  4.0	 6.08	±4.85	
Columbus,OH	1840	362	  0	  1	 35	  7.0	(91)	  4.0	(91)	  4.0	(91)	  6.0	(89)	  4.0	 6.29	±5.78	
Dallas,TX	1920	366	  0	  1	 29	  3.0	(91)	  3.0	(91)	  3.0	(92)	  1.0	(92)	  3.0	 3.35	±3.27	
Denver,CO	2080	365	  0	  1	 24	  4.0	(91)	  3.0	(91)	  4.0	(91)	  4.0	(92)	  4.0	 4.52	±3.05	
Detroit,MI	2160	366	  0	  1	 68	  7.0	(91)	  9.0	(91)	 11.0	(92)	  9.5	(92)	  9.0	13.61	±12.76	
Fargo-Moorhead,ND-MN	2520	351	  0	  1	  4	  1.0	(76)	  1.0	(91)	  1.0	(92)	  1.0	(92)	  1.0	 1.12	±0.48	
Fort Lauderdale,FL	2680	350	  0	  1	 28	  1.0	(90)	  1.0	(89)	  1.0	(81)	  1.0	(90)	  1.0	 2.04	±3.29	
Gary,IN	2960	366	  0	  1	 63	 10.0	(91)	  6.0	(91)	  7.0	(92)	 10.0	(92)	  7.0	10.40	±8.38	
Grand Rapids-Muskegon-Holland,MI	3000	356	  0	  1	 19	  1.0	(84)	  1.0	(91)	  1.0	(92)	  1.0	(89)	  1.0	 2.01	±1.94	
Greensboro-Winston Salem-High Point,NC	3120	353	  0	  1	 38	  7.0	(79)	  4.0	(90)	  4.0	(92)	  6.0	(92)	  6.0	 6.60	±5.52	
Greenville-Spartanburg-Anderson,SC	3160	354	  0	  1	 24	  4.0	(91)	  3.0	(91)	  3.0	(85)	  3.0	(87)	  3.0	 3.69	±3.29	
Hartford,CT	3280	346	  0	  1	 31	  4.0	(81)	  1.0	(89)	  3.0	(84)	  4.0	(92)	  3.0	 4.54	±4.44	
Honolulu,HI	3320	366	  0	  1	 15	  1.0	(91)	  1.0	(91)	  1.0	(92)	  3.0	(92)	  1.0	 2.00	±1.60	
Houston,TX	3360	366	  0	  3	 44	 10.0	(91)	  9.0	(91)	  9.0	(92)	 10.0	(92)	  9.0	10.86	±5.82	
Huntington-Ashland,WV-KY-OH	3400	366	  0	  4	 65	 16.0	(91)	 13.0	(91)	  9.0	(92)	 15.0	(92)	 13.0	15.81	±9.31	
Indianapolis,IN	3480	366	  0	  3	 55	 12.0	(91)	 10.0	(91)	 10.0	(92)	 13.0	(92)	 12.0	13.14	±8.09	
Jackson,MS	3560	362	  0	  1	  9	  1.0	(91)	  1.0	(90)	  1.0	(89)	  1.0	(92)	  1.0	 1.52	±1.19	
Jacksonville,FL	3600	362	  0	  1	 46	  6.0	(91)	  4.0	(91)	  3.0	(88)	  3.0	(92)	  4.0	 5.77	±6.23	
Jersey City,NJ	3640	366	  0	  3	 44	 15.0	(91)	 12.0	(91)	  9.0	(92)	 12.0	(92)	 12.0	13.14	±6.56	
Kansas City,MO-KS	3760	366	  0	  1	 85	  9.0	(91)	  4.0	(91)	  6.0	(92)	  7.0	(92)	  6.0	 9.19	±10.16	
Knoxville,TN	3840	366	  0	  1	 73	 22.0	(91)	 16.0	(91)	  9.5	(92)	 14.0	(92)	 15.5	21.40	±17.20	
Las Cruces,NM	4100	360	  0	  1	  7	  1.0	(91)	  1.0	(91)	  1.0	(92)	  1.0	(86)	  1.0	 1.30	±0.82	
Las Vegas,NV-AZ	4120	360	  0	  1	 10	  7.0	(88)	  1.0	(91)	  1.0	(92)	  1.0	(89)	  1.0	 2.94	±3.13	
Lexington,KY	4280	360	  0	  1	 22	  6.0	(90)	  3.0	(88)	  3.0	(90)	  6.0	(92)	  4.0	 5.15	±3.98	
Little Rock-North Little Rock,AR	4400	353	  0	  1	 10	  4.0	(82)	  1.0	(91)	  1.0	(92)	  3.0	(88)	  3.0	 2.62	±2.01	
Los Angeles-Long Beach,CA	4480	366	  0	  1	 22	  6.0	(91)	  7.0	(91)	 10.0	(92)	 10.0	(92)	  9.0	 8.52	±2.94	
Louisville,KY-IN	4520	366	  0	  1	 57	 13.0	(91)	 13.0	(91)	 13.0	(92)	 10.0	(92)	 13.0	14.49	±8.60	
Memphis,TN-AR-MS	4920	366	  0	  4	 59	  7.0	(91)	  9.0	(91)	  6.0	(92)	 10.0	(92)	  7.0	 9.53	±7.13	
Miami,FL	5000	242	  0	  1	  3	   . 	(.)	  1.0	(84)	  1.0	(77)	  1.0	(81)	  1.0	 1.04	±0.29	
Middlesex-Somerset-Hunterdon,NJ	5015	363	  0	  1	 29	  9.0	(91)	  4.0	(91)	  4.0	(89)	  6.0	(92)	  4.0	 6.34	±4.60	
Milwaukee-Waukesha,WI	5080	363	  0	  3	 21	  3.0	(91)	  3.0	(91)	  3.0	(91)	  4.0	(90)	  3.0	 4.74	±3.09	
Minneapolis-St. Paul,MN-WI	5120	366	  0	  1	 73	  6.0	(91)	  6.0	(91)	  3.0	(92)	  3.0	(92)	  4.0	 6.45	±9.11	
Mobile,AL	5160	358	  0	  1	 12	  3.0	(91)	  3.0	(91)	  1.0	(84)	  1.0	(92)	  1.0	 2.20	±1.78	
Nashville,TN	5360	366	  0	  1	 24	  7.0	(91)	  3.0	(91)	  3.0	(92)	  4.0	(92)	  3.0	 4.41	±3.95	
Nassau-Suffolk,NY	5380	366	  0	  1	 50	 13.0	(91)	  6.0	(91)	  4.0	(92)	 12.0	(92)	  7.0	10.42	±8.19	
New Haven-Meriden,CT	5480	364	  0	  1	 43	 10.0	(89)	  4.0	(91)	  4.0	(92)	  7.0	(92)	  6.0	 7.62	±6.58	
New Orleans,LA	5560	351	  0	  1	 64	  3.0	(88)	  3.0	(86)	  3.0	(92)	  4.0	(85)	  3.0	 4.77	±6.96	
New York,NY	5600	366	  0	  4	 56	 24.0	(91)	 12.0	(91)	 10.0	(92)	 21.0	(92)	 16.0	17.57	±9.32	
Newark,NJ	5640	366	  0	  3	 37	 13.0	(91)	 10.0	(91)	  9.0	(92)	 10.0	(92)	 10.0	11.28	±6.07	
Norfolk-Virginia Beach-Newport News,VA_NC	5720	366	  0	  1	 31	 10.0	(91)	  6.0	(91)	  4.0	(92)	  7.0	(92)	  7.0	 8.34	±5.68	
Oakland,CA	5775	366	  0	  1	 15	  4.0	(91)	  3.0	(91)	  4.0	(92)	  3.5	(92)	  4.0	 4.22	±2.16	
Oklahoma City,OK	5880	354	  0	  1	  4	  1.0	(88)	  1.0	(91)	  1.0	(86)	  1.0	(89)	  1.0	 1.21	±0.63	
Omaha,NE-IA	5920	364	  0	  1	 65	  1.0	(91)	  1.0	(89)	  1.0	(92)	  3.0	(92)	  1.0	 2.72	±4.60	
Orange County,CA	5945	357	  0	  1	 12	  1.0	(91)	  1.0	(91)	  3.0	(83)	  3.0	(92)	  1.0	 2.34	±1.83	
Orlando,FL	5960	345	  0	  1	  7	  1.0	(91)	  1.0	(91)	  1.0	(77)	  1.0	(86)	  1.0	 1.51	±1.13	
Philadelphia,PA-NJ	6160	366	  0	  1	 46	 13.0	(91)	  9.0	(91)	  6.0	(92)	 12.0	(92)	  9.0	11.14	±7.02	
Phoenix-Mesa,AZ	6200	366	  0	  1	 13	  3.0	(91)	  3.0	(91)	  4.0	(92)	  4.0	(92)	  3.0	 3.72	±1.75	
Pittsburgh,PA	6280	366	  0	  7	 72	 26.0	(91)	 21.0	(91)	 21.0	(92)	 24.0	(92)	 22.0	25.18	±12.48	
Pocatello,ID	6340	366	  0	  1	 34	  1.0	(91)	  6.0	(91)	  6.0	(92)	  4.0	(92)	  4.0	 5.90	±5.34	
Portland,ME	6400	366	  0	  1	 31	  6.0	(91)	  3.0	(91)	  3.0	(92)	  4.0	(92)	  3.0	 4.63	±3.78	
Providence-Fall River-Warwick,RI-MA	6480	366	  0	  1	 43	 18.0	(91)	  7.0	(91)	  4.0	(92)	 13.0	(92)	  9.0	11.32	±7.56	
Raleigh-Durham-Chapel Hill,NC	6640	245	  0	  1	 19	   . 	(.)	  3.0	(61)	  3.0	(92)	  4.0	(92)	  3.0	 3.77	±2.84	
Richmond-Petersburg,VA	6760	366	  0	  1	 32	  9.0	(91)	  7.0	(91)	  5.0	(92)	  6.0	(92)	  7.0	 7.77	±5.27	
Riverside-San Bernardino,CA	6780	366	  0	  1	 22	  4.0	(91)	  7.0	(91)	  3.0	(92)	  3.0	(92)	  4.0	 5.10	±3.90	
St, Louis,MO-IL	7040	366	  0	  4	 76	 15.0	(91)	 12.0	(91)	 15.0	(92)	 18.0	(92)	 15.0	19.49	±14.26	
Salt Lake City-Ogden,UT	7160	366	  0	  1	 22	 10.0	(91)	  4.0	(91)	  4.0	(92)	  4.0	(92)	  6.0	 6.54	±3.89	
San Diego,CA	7320	366	  0	  4	 22	  9.0	(91)	  6.0	(91)	 10.0	(92)	 12.0	(92)	  9.0	 9.23	±3.65	
Seattle-Bellevue-Everett,WA	7600	352	  0	  1	 28	  3.0	(91)	  3.0	(91)	  4.0	(78)	  6.0	(92)	  4.0	 4.28	±3.28	
Shreveport-Bossier City,LA	7680	366	  0	  1	  9	  3.0	(91)	  3.0	(91)	  4.0	(92)	  4.0	(92)	  3.0	 3.58	±1.38	
Sioux Falls,SD	7760	363	  0	  1	 10	  1.0	(89)	  1.0	(90)	  1.0	(92)	  1.0	(92)	  1.0	 1.28	±0.91	
Springfield,MA	8000	366	  0	  1	 38	  9.0	(91)	  4.0	(91)	  4.0	(92)	  9.0	(92)	  7.0	 8.05	±5.73	
Tampa-St. Petersburg-Clearwater,FL	8280	366	  0	  1	 56	 10.0	(91)	  9.0	(91)	  7.0	(92)	  9.0	(92)	  9.0	10.85	±8.35	
Tucson,AZ	8520	366	  0	  1	  9	  1.0	(91)	  1.0	(91)	  1.0	(92)	  3.0	(92)	  1.0	 1.64	±1.17	
Tulsa,OK	8560	366	  0	  1	 60	  9.0	(91)	 15.0	(91)	  9.0	(92)	 10.0	(92)	 10.0	13.55	±11.26	
Washington,DC-MD-VA-WV	8840	366	  0	  3	 37	 13.0	(91)	 13.0	(91)	 12.0	(92)	 12.0	(92)	 12.0	13.08	±5.57	
Wilmington-Newark,DE-MD	9160	366	  0	  1	 65	 15.0	(91)	 12.0	(91)	  7.0	(92)	  9.0	(92)	 10.0	12.38	±9.24	
Wilmington,NC	9200	358	  0	  1	 32	  7.0	(89)	  4.0	(91)	  6.0	(87)	  6.0	(91)	  6.0	 7.46	±6.07