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	  3	 42	 15.0	(90)	  9.0	(91)	  9.0	(92)	 16.0	(92)	 11.0	13.56	±7.16	
Atlanta,GA	 520	365	  0	  3	 33	 10.0	(90)	 11.0	(91)	 11.0	(92)	 15.0	(92)	 11.0	12.34	±4.93	
Austin-San Marcos,TX	 640	364	  0	  3	 10	  5.0	(90)	  3.0	(91)	  3.0	(91)	  3.0	(92)	  3.0	 4.13	±1.62	
Baltimore,MD	 720	365	  0	  3	 32	 10.0	(90)	  8.0	(91)	  6.5	(92)	 11.0	(92)	  8.0	 9.93	±5.70	
Baton Rouge,LA	 760	362	  0	  3	 35	  9.0	(87)	  8.0	(91)	  8.0	(92)	 10.0	(92)	  9.0	 9.81	±4.82	
Bergen-Passaic,NJ	 875	364	  0	  6	 30	 13.0	(90)	 14.0	(91)	 13.0	(91)	 14.5	(92)	 14.0	14.15	±4.55	
Birmingham,AL	1000	365	  0	  3	 70	 14.5	(90)	  9.0	(91)	 10.0	(92)	 18.5	(92)	 13.0	14.86	±9.37	
Boise City,ID	1080	365	  0	  6	 42	 22.0	(90)	 17.0	(91)	 20.0	(92)	 25.0	(92)	 20.0	21.16	±6.46	
Boston,MA-NH	1120	365	  0	  3	 30	  9.0	(90)	  9.0	(91)	  8.0	(92)	 10.5	(92)	  9.0	 9.78	±3.61	
Burlington,VT	1305	341	  0	  3	 22	  9.5	(66)	  8.0	(91)	  8.0	(92)	 10.0	(92)	  9.0	 9.17	±2.77	
Charleston-North Charleston,SC	1440	365	  0	  3	 34	  7.0	(90)	  5.0	(91)	  6.0	(92)	  7.0	(92)	  6.0	 6.98	±4.02	
Charlotte-Gastonia-Rock Hill,NC-SC	1520	362	  0	  3	 34	  7.0	(87)	  8.0	(91)	  6.0	(92)	 12.0	(92)	  8.0	 9.33	±5.44	
Chicago,IL	1600	365	  0	  3	 40	 19.0	(90)	 15.0	(91)	 18.0	(92)	 23.0	(92)	 19.0	18.99	±6.51	
Cincinnati,OH-KY-IN	1640	365	  0	  3	 25	  9.0	(90)	  8.0	(91)	  8.0	(92)	  9.0	(92)	  8.0	 8.75	±3.50	
Cleveland-Lorain-Elyria,OH	1680	365	  0	  5	 40	 16.5	(90)	 22.0	(91)	 14.0	(92)	 13.0	(92)	 18.0	17.63	±6.30	
Columbia,SC	1760	362	  0	  3	 28	 10.0	(90)	  9.0	(88)	  8.0	(92)	 10.0	(92)	  9.0	 9.43	±4.34	
Columbus,OH	1840	365	  0	  3	 40	  9.0	(90)	  8.0	(91)	  8.0	(92)	  9.0	(92)	  9.0	 9.41	±4.01	
Dallas,TX	1920	357	  0	  3	 26	  6.0	(90)	  6.0	(91)	  5.0	(92)	  7.0	(84)	  6.0	 6.51	±3.98	
Denver,CO	2080	365	  0	  6	 69	 16.0	(90)	 10.0	(91)	 11.0	(92)	 19.0	(92)	 13.0	15.50	±8.26	
Des Moines,IA	2120	365	  0	  7	 27	 14.0	(90)	 11.0	(91)	 11.0	(92)	 13.0	(92)	 11.0	13.01	±3.71	
Detroit,MI	2160	365	  0	  3	 40	  7.0	(90)	  7.0	(91)	  9.0	(92)	  7.5	(92)	  7.0	 9.34	±5.48	
Fayetteville,NC	2560	183	  0	  6	 47	 14.0	(90)	 11.0	(1)	   . 	(.)	 16.0	(92)	 15.0	16.37	±7.50	
Fort Lauderdale,FL	2680	365	  0	  5	 45	 15.0	(90)	 11.0	(91)	 13.0	(92)	 18.0	(92)	 14.0	15.41	±6.58	
Fort Wayne,IN	2760	343	  0	  3	 35	  9.5	(68)	 15.0	(91)	 10.0	(92)	 10.0	(92)	 11.0	11.22	±5.11	
Fort Worth-Arlington,TX	2800	365	  0	  3	 24	  7.0	(90)	  6.0	(91)	  5.0	(92)	  7.0	(92)	  7.0	 7.10	±3.59	
Gary,IN	2960	343	  0	  3	 57	 14.0	(77)	 15.0	(91)	 11.0	(83)	  8.0	(92)	 11.0	12.91	±6.89	
Grand Rapids-Muskegon-Holland,MI	3000	365	  0	  3	 30	  5.0	(90)	  5.0	(91)	  6.0	(92)	  6.0	(92)	  5.0	 6.38	±4.08	
Greensboro-Winston Salem-High Point,NC	3120	365	  0	  3	 51	 15.5	(90)	  9.0	(91)	 11.0	(92)	 16.0	(92)	 13.0	13.92	±7.11	
Greenville-Spartanburg-Anderson,SC	3160	353	  0	  3	 35	  7.0	(78)	  5.0	(91)	  5.0	(92)	 12.0	(92)	  7.0	 8.67	±6.51	
Hartford,CN	3280	365	  0	  7	 63	 27.0	(90)	 25.0	(91)	 25.0	(92)	 25.0	(92)	 25.0	26.85	±9.99	
Honolulu,HI	3320	365	  0	  7	 26	 14.0	(90)	 10.0	(91)	 11.0	(92)	 13.0	(92)	 11.0	12.38	±3.46	
Houston,TX	3360	365	  0	  5	 55	 13.0	(90)	 10.0	(91)	 11.0	(92)	 15.0	(92)	 11.0	13.38	±5.76	
Huntington-Ashland,WV-KY-OH	3400	179	  0	  3	 18	  3.0	(87)	  3.0	(91)	  3.0	(1)	   . 	(.)	  3.0	 4.17	±2.54	
Indianapolis,IN	3480	365	  0	  3	 35	 13.0	(90)	 11.0	(91)	 10.0	(92)	 11.0	(92)	 11.0	11.82	±3.89	
Jackson,MS	3560	365	  0	  3	 44	  7.0	(90)	  5.0	(91)	  5.0	(92)	  7.0	(92)	  6.0	 7.39	±5.54	
Jacksonville,FL	3600	365	  0	  3	 34	 13.0	(90)	  9.0	(91)	  9.0	(92)	 15.0	(92)	 11.0	12.05	±4.95	
Jersey City,NJ	3640	361	  0	  6	 34	 18.0	(90)	 17.0	(91)	 16.0	(89)	 19.0	(91)	 17.0	17.57	±5.72	
Kansas City,MO-KS	3760	314	  0	  3	 34	 13.0	(90)	  3.0	(40)	 10.0	(92)	  9.0	(92)	  9.0	10.56	±6.02	
Las Cruces,NM	4100	365	  0	  3	 32	 12.0	(90)	  7.0	(91)	  5.0	(92)	 15.0	(92)	  8.0	 9.67	±6.49	
Las Vegas,NV-AZ	4120	365	  0	  6	 61	 23.5	(90)	 13.0	(91)	 16.0	(92)	 28.0	(92)	 19.0	22.01	±13.23	
Lexington,KY	4280	181	  0	  3	 15	  3.0	(89)	  3.0	(91)	  3.0	(1)	   . 	(.)	  3.0	 3.84	±1.89	
Lincoln,NE	4360	365	  0	  3	 48	 11.0	(90)	  9.0	(91)	  8.0	(92)	 13.0	(92)	 10.0	11.07	±5.82	
Little Rock-North Little Rock,AR	4400	363	  0	  3	 27	 10.5	(88)	  6.0	(91)	  3.0	(92)	  8.0	(92)	  7.0	 8.17	±5.40	
Los Angeles-Long Beach,CA	4480	365	  0	  7	 79	 30.0	(90)	 13.0	(91)	 16.0	(92)	 37.0	(92)	 19.0	24.93	±15.26	
Louisville,KY-IN	4520	365	  0	  3	 41	 18.0	(90)	 13.0	(91)	  9.5	(92)	 14.0	(92)	 14.0	14.34	±6.51	
Memphis,TN-AR-MS	4920	359	  0	  3	 40	 10.0	(90)	 10.0	(91)	 14.0	(86)	 14.0	(92)	 11.0	13.56	±6.53	
Miami,FL	5000	365	  0	  5	 41	 17.0	(90)	 20.0	(91)	 22.0	(92)	 14.0	(92)	 19.0	19.04	±6.28	
Middlesex-Somerset-Hunterdon,NJ	5015	364	  0	  3	 24	 11.0	(90)	  9.0	(91)	  9.0	(91)	 10.0	(92)	  9.0	10.12	±3.68	
Milwaukee-Waukesha,WI	5080	365	  0	  3	 42	  9.0	(90)	  6.0	(91)	  7.0	(92)	  8.0	(92)	  8.0	 8.32	±4.71	
Minneapolis-St. Paul,MN-WI	5120	365	  0	  3	 50	 13.0	(90)	 11.0	(91)	 10.0	(92)	 10.0	(92)	 11.0	12.12	±6.94	
Monmouth-Ocean,NJ	5190	365	  0	  3	 33	  9.0	(90)	  9.0	(91)	 10.0	(92)	 10.5	(92)	 10.0	10.37	±4.01	
Nashville,TN	5360	365	  0	  3	 49	 17.0	(90)	 14.0	(91)	 16.0	(92)	 17.0	(92)	 16.0	17.34	±7.36	
Nassau-Suffolk,NY	5380	365	  0	  3	 23	  3.0	(90)	  3.0	(91)	  3.0	(92)	  3.0	(92)	  3.0	 4.73	±3.43	
New Haven-Meriden,CT	5480	365	  0	  3	 24	  9.0	(90)	  8.0	(91)	  9.0	(92)	  9.0	(92)	  9.0	 9.59	±3.59	
New Orleans,LA	5560	365	  0	  7	 42	 16.0	(90)	 13.0	(91)	 14.0	(92)	 15.0	(92)	 14.0	14.86	±4.60	
New York,NY	5600	365	  0	  8	 38	 16.0	(90)	 17.0	(91)	 17.0	(92)	 18.0	(92)	 17.0	17.84	±4.79	
Newark,NJ	5640	365	  0	  5	 43	 14.0	(90)	 18.0	(91)	 14.0	(92)	 16.0	(92)	 15.0	16.53	±6.83	
Norfolk-Virginia Beach-Newport News,VA_NC	5720	364	  0	  3	 43	  8.0	(90)	  7.0	(91)	  6.0	(91)	  9.0	(92)	  7.0	 8.49	±5.61	
Oakland,CA	5775	365	  0	  3	 50	 17.5	(90)	  8.0	(91)	  6.5	(92)	 15.0	(92)	 10.0	12.50	±7.68	
Oklahoma City,OK	5880	358	  0	  3	 32	 11.0	(90)	  8.0	(91)	  3.0	(87)	  7.0	(90)	  8.0	 9.03	±5.65	
Omaha,NE-IA	5920	365	  0	  3	 43	  9.5	(90)	  9.0	(91)	  9.0	(92)	  9.0	(92)	  9.0	10.93	±5.91	
Orange County,CA	5945	365	  0	  3	 65	 18.5	(90)	  7.0	(91)	  8.0	(92)	 22.0	(92)	 11.0	15.08	±10.51	
Orlando,FL	5960	365	  0	  3	 23	 13.0	(90)	 13.0	(91)	 10.0	(92)	 11.0	(92)	 11.0	11.64	±3.82	
Philadelphia,PA-NJ	6160	365	  0	  6	 44	 14.5	(90)	 13.0	(91)	 15.0	(92)	 16.5	(92)	 14.0	15.41	±6.23	
Phoenix-Mesa,AZ	6200	365	  0	  5	 68	 31.0	(90)	 15.0	(91)	 11.0	(92)	 35.0	(92)	 20.0	23.88	±13.57	
Pittsburgh,PA	6280	365	  0	  3	 40	  7.0	(90)	  6.0	(91)	  7.0	(92)	 10.5	(92)	  7.0	 8.88	±5.48	
Portland,ME	6400	154	  0	  3	  9	   . 	(.)	  3.0	(61)	  3.0	(92)	  3.0	(1)	  3.0	 4.58	±2.03	
Portland-Vancouver,OR-WA	6440	365	  0	  9	 53	 26.0	(90)	 15.0	(91)	 14.0	(92)	 24.0	(92)	 19.0	20.76	±8.64	
Providence-Fall River-Warwick,RI-MA	6480	365	  0	  3	 28	 14.0	(90)	 10.0	(91)	  9.0	(92)	 12.0	(92)	 10.0	11.67	±4.54	
Provo-Orem,UT	6520	365	  0	  3	 47	 17.0	(90)	  7.0	(91)	  9.0	(92)	 18.0	(92)	 11.0	14.36	±8.89	
Raleigh-Durham-Chapel Hill,NC	6640	311	  0	  3	 38	 14.0	(90)	  6.0	(50)	  5.0	(79)	 19.0	(92)	 11.0	12.53	±7.76	
Reno,NV	6720	365	  0	  3	 45	 19.0	(90)	  8.0	(91)	 13.0	(92)	 20.0	(92)	 14.0	16.16	±9.15	
Richmond-Petersburg,VA	6760	365	  0	  3	 27	  9.5	(90)	  6.0	(91)	  7.0	(92)	 10.0	(92)	  8.0	 8.92	±4.53	
Riverside-San Bernardino,CA	6780	365	  0	  5	 51	 17.0	(90)	 11.0	(91)	 14.0	(92)	 21.0	(92)	 15.0	16.26	±6.65	
St, Louis,MO-IL	7040	365	  0	  6	 36	 11.0	(90)	 11.0	(91)	 11.0	(92)	 10.0	(92)	 11.0	12.32	±5.06	
Salt Lake City-Ogden,UT	7160	365	  0	  7	 58	 22.0	(90)	 13.0	(91)	 14.0	(92)	 23.5	(92)	 16.0	19.18	±9.81	
San Antonio,TX	7240	361	  0	  3	 33	  9.0	(89)	  7.0	(91)	  8.0	(92)	  9.0	(89)	  8.0	 8.82	±3.98	
San Diego,CA	7320	365	  1	  6	120	 22.0	(90)	 13.0	(91)	 11.0	(92)	 24.0	(92)	 15.0	18.88	±11.47	
Santa Fe,NM	7490	363	  0	  3	 26	  6.0	(90)	  6.0	(89)	 10.0	(92)	 10.0	(92)	  8.0	 8.37	±3.48	
Seattle-Bellevue-Everett,WA	7600	365	  0	  7	 77	 25.0	(90)	 16.0	(91)	 15.0	(92)	 22.5	(92)	 18.0	21.18	±9.18	
Spokane,WA	7840	365	  0	  9	 56	 29.0	(90)	 23.0	(91)	 23.0	(92)	 27.0	(92)	 25.0	26.28	±8.49	
Springfield,MA	8000	365	  0	  3	 35	 13.0	(90)	  6.0	(91)	  5.0	(92)	 10.0	(92)	  8.0	 9.60	±6.46	
Tacoma,WA	8200	365	  0	  3	 63	 17.0	(90)	 10.0	(91)	 11.0	(92)	 13.0	(92)	 13.0	14.41	±9.02	
Tampa-St. Petersburg-Clearwater,FL	8280	365	  0	  6	 41	 17.0	(90)	 13.0	(91)	 16.0	(92)	 16.0	(92)	 15.0	15.98	±4.75	
Tucson,AZ	8520	365	  0	  6	 35	 16.0	(90)	 11.0	(91)	 13.0	(92)	 17.0	(92)	 14.0	14.92	±5.24	
Tusla,OK	8560	365	  0	  3	 35	 15.0	(90)	 10.0	(91)	  9.0	(92)	 13.0	(92)	 11.0	12.18	±4.79	
Washington,DC-MD-VA-WV	8840	365	  0	  8	 51	 18.0	(90)	 15.0	(91)	 14.0	(92)	 17.0	(92)	 16.0	18.02	±7.51	
Wichita,KS	9040	365	  0	  3	 39	 12.0	(90)	  6.0	(91)	  5.0	(92)	  9.0	(92)	  7.0	 9.43	±6.49	
Wilmington-Newark,DE-MD	9160	365	  0	  3	 30	  9.5	(90)	  7.0	(91)	  3.0	(92)	 10.5	(92)	  7.0	 8.16	±4.88	
Wilmington,NC	9200	174	  0	  3	 42	 11.0	(88)	 11.0	(1)	   . 	(.)	 16.0	(85)	 14.0	14.76	±7.37