| 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 | 362 | 1 | 6 | 106 | 20.0 | (90) | 20.0 | (90) | 21.5 | (90) | 27.5 | (92) | 21.0 | 25.96 | ±15.10
Atlanta,GA | 520 | 361 | 5 | 12 | 125 | 45.0 | (90) | 52.0 | (91) | 59.0 | (88) | 49.0 | (92) | 53.0 | 52.48 | ±18.94
Augusta-Aiken,GA | 600 | 126 | 3 | 12 | 112 | 41.0 | (31) | 56.0 | (31) | 60.5 | (30) | 47.0 | (34) | 51.5 | 50.51 | ±19.99
Austin-San Marcos,TX | 640 | 22 | 0 | 11 | 66 | . | (.) | . | (.) | 27.5 | (10) | 20.0 | (12) | 24.0 | 31.50 | ±18.08
Baltimore,MD | 720 | 364 | 7 | 8 | 119 | 53.5 | (90) | 44.0 | (90) | 57.5 | (92) | 42.5 | (92) | 50.5 | 50.83 | ±21.99
Bergen-Passaic,NJ | 875 | 117 | 4 | 6 | 122 | 39.0 | (27) | 35.0 | (29) | 48.5 | (30) | 37.0 | (31) | 41.0 | 45.13 | ±22.93
Birmingham,AL | 1000 | 364 | 26 | 16 | 145 | 48.0 | (90) | 55.0 | (91) | 68.0 | (91) | 52.0 | (92) | 56.0 | 59.75 | ±24.09
Bismarck,ND | 1010 | 117 | 0 | 5 | 65 | 22.5 | (28) | 14.0 | (31) | 19.0 | (29) | 14.0 | (29) | 17.0 | 20.97 | ±12.80
Boise City,ID | 1080 | 121 | 3 | 4 | 132 | 41.5 | (30) | 12.0 | (30) | 23.5 | (30) | 33.0 | (31) | 22.0 | 30.90 | ±25.75
Charleston-North Charleston,SC | 1440 | 365 | 4 | 8 | 104 | 39.5 | (90) | 36.0 | (91) | 41.5 | (92) | 35.0 | (92) | 37.0 | 40.71 | ±18.66
Charleston,WV | 1480 | 122 | 2 | 14 | 103 | 47.0 | (30) | 54.0 | (31) | 72.5 | (30) | 44.0 | (31) | 53.0 | 53.05 | ±20.86
Charlotte-Gastonia-Rock Hill,NC-SC | 1520 | 361 | 2 | 8 | 110 | 43.0 | (90) | 52.0 | (89) | 61.5 | (92) | 43.0 | (90) | 50.0 | 48.77 | ±19.10
Cheyenne,WY | 1580 | 107 | 0 | 1 | 33 | 12.5 | (28) | 12.5 | (26) | 16.0 | (25) | 8.0 | (28) | 12.0 | 13.33 | ±6.76
Chicago,IL | 1600 | 341 | 10 | 6 | 144 | 56.5 | (84) | 44.0 | (87) | 52.5 | (84) | 52.0 | (86) | 52.0 | 52.31 | ±24.44
Cincinnati,OH-KY-IN | 1640 | 132 | 6 | 17 | 137 | 55.0 | (31) | 58.5 | (32) | 68.0 | (31) | 48.5 | (38) | 56.5 | 58.04 | ±22.05
Cleveland-Lorain-Elyria,OH | 1680 | 140 | 7 | 15 | 129 | 53.0 | (48) | 57.0 | (31) | 66.0 | (30) | 55.0 | (31) | 57.0 | 57.94 | ±23.98
Columbia,SC | 1760 | 351 | 5 | 12 | 106 | 42.0 | (88) | 46.0 | (87) | 52.0 | (85) | 38.0 | (91) | 43.0 | 45.76 | ±18.59
Columbus,OH | 1840 | 110 | 3 | 15 | 123 | 50.0 | (30) | 45.0 | (26) | 61.0 | (23) | 43.0 | (31) | 51.5 | 50.39 | ±20.58
Dallas,TX | 1920 | 364 | 0 | 8 | 96 | 35.0 | (90) | 43.0 | (91) | 43.0 | (92) | 35.0 | (91) | 39.0 | 41.12 | ±16.49
Denver,CO | 2080 | 359 | 0 | 10 | 99 | 33.5 | (90) | 28.0 | (91) | 31.5 | (88) | 30.5 | (90) | 31.0 | 33.64 | ±15.33
Des Moines,IA | 2120 | 350 | 4 | 3 | 117 | 38.0 | (90) | 25.0 | (84) | 31.0 | (86) | 29.0 | (90) | 31.0 | 35.25 | ±20.41
Detroit,MI | 2160 | 365 | 14 | 6 | 160 | 52.0 | (90) | 42.0 | (91) | 51.5 | (92) | 45.5 | (92) | 49.0 | 51.40 | ±27.28
Dover,DE | 2190 | 122 | 0 | 3 | 99 | 45.5 | (30) | 34.0 | (31) | 46.5 | (30) | 31.0 | (31) | 38.0 | 41.37 | ±20.12
Fargo-Moorhead,ND-MN | 2520 | 118 | 0 | 1 | 70 | 30.0 | (27) | 17.0 | (31) | 18.5 | (30) | 18.5 | (30) | 19.0 | 24.02 | ±14.94
Fort Lauderdale,FL | 2680 | 333 | 0 | 7 | 63 | 28.0 | (83) | 27.0 | (91) | 24.0 | (90) | 23.0 | (69) | 26.0 | 28.26 | ±11.80
Fort Worth-Arlington,TX | 2800 | 364 | 0 | 11 | 84 | 35.5 | (90) | 45.0 | (91) | 42.0 | (92) | 36.0 | (91) | 40.0 | 41.21 | ±16.04
Grand Rapids-Muskegon-Holland,MI | 3000 | 365 | 11 | 6 | 157 | 47.5 | (90) | 35.0 | (91) | 38.5 | (92) | 31.0 | (92) | 37.0 | 42.83 | ±25.42
Greensboro-Winston Salem-High Point,NC | 3120 | 364 | 2 | 9 | 108 | 39.0 | (90) | 47.0 | (91) | 58.0 | (92) | 39.0 | (91) | 46.0 | 46.96 | ±19.45
Greenville-Spartanburg-Anderson,SC | 3160 | 365 | 1 | 8 | 122 | 42.0 | (90) | 46.0 | (91) | 58.0 | (92) | 47.5 | (92) | 49.0 | 48.74 | ±19.16
Honolulu,HI | 3320 | 361 | 2 | 4 | 164 | 13.0 | (90) | 12.0 | (91) | 10.0 | (92) | 13.0 | (88) | 12.0 | 14.60 | ±12.60
Houston,TX | 3360 | 330 | 0 | 16 | 99 | 43.0 | (87) | 54.0 | (73) | 54.0 | (81) | 48.0 | (89) | 48.0 | 48.85 | ±15.20
Huntington-Ashland,WV-KY-OH | 3400 | 130 | 4 | 17 | 113 | 45.0 | (34) | 55.0 | (34) | 68.0 | (31) | 52.0 | (31) | 54.5 | 54.87 | ±20.23
Indianapolis,IN | 3480 | 363 | 15 | 8 | 146 | 50.0 | (90) | 46.0 | (90) | 56.0 | (91) | 42.5 | (92) | 50.0 | 51.12 | ±23.30
Jackson,MS | 3560 | 120 | 1 | 7 | 119 | 28.0 | (29) | 41.0 | (31) | 52.0 | (29) | 42.0 | (31) | 42.0 | 42.88 | ±18.83
Jersey City,NJ | 3640 | 115 | 4 | 9 | 109 | 47.0 | (28) | 41.0 | (27) | 53.0 | (29) | 48.0 | (31) | 47.0 | 48.23 | ±21.98
Kansas City,MO-KS | 3760 | 348 | 0 | 11 | 97 | 46.0 | (87) | 39.0 | (83) | 46.0 | (87) | 38.0 | (91) | 42.5 | 44.34 | ±18.97
Las Cruces,NM | 4100 | 122 | 1 | 6 | 104 | 20.0 | (29) | 24.5 | (32) | 24.0 | (30) | 34.0 | (31) | 25.0 | 29.96 | ±18.79
Las Vegas,NV-AZ | 4120 | 348 | 0 | 5 | 95 | 24.0 | (88) | 19.0 | (90) | 24.0 | (87) | 41.0 | (83) | 24.0 | 29.28 | ±17.57
Lincoln,NE | 4360 | 120 | 0 | 6 | 91 | 35.0 | (30) | 19.0 | (30) | 28.0 | (29) | 20.0 | (31) | 27.0 | 31.04 | ±18.31
Little Rock-North Little Rock,AR | 4400 | 357 | 7 | 9 | 117 | 36.0 | (87) | 42.0 | (91) | 58.0 | (88) | 43.0 | (91) | 44.0 | 47.92 | ±21.29
Los Angeles-Long Beach,CA | 4480 | 365 | 22 | 13 | 190 | 44.5 | (90) | 45.0 | (91) | 59.5 | (92) | 64.5 | (92) | 56.0 | 57.27 | ±25.99
Louisville,KY-IN | 4520 | 365 | 9 | 14 | 118 | 44.5 | (90) | 53.0 | (91) | 62.0 | (92) | 49.0 | (92) | 53.0 | 52.83 | ±20.82
Memphis,TN-AR-MS | 4920 | 365 | 7 | 10 | 127 | 35.0 | (90) | 40.0 | (91) | 57.0 | (92) | 41.0 | (92) | 44.0 | 46.39 | ±20.31
Miami,FL | 5000 | 355 | 0 | 11 | 70 | 31.0 | (90) | 30.0 | (91) | 29.0 | (92) | 27.5 | (82) | 30.0 | 31.52 | ±11.45
Middlesex-Somerset-Hunterdon,NJ | 5015 | 108 | 0 | 3 | 98 | 42.0 | (27) | 30.0 | (25) | 46.0 | (26) | 27.0 | (30) | 35.0 | 40.42 | ±20.60
Milwaukee-Waukesha,WI | 5080 | 144 | 4 | 0 | 119 | 54.5 | (38) | 35.0 | (33) | 48.5 | (34) | 47.0 | (39) | 47.0 | 46.99 | ±24.78
Minneapolis-St. Paul,MN-WI | 5120 | 124 | 1 | 8 | 154 | 40.0 | (31) | 34.5 | (32) | 38.0 | (30) | 40.0 | (31) | 39.0 | 42.59 | ±19.67
Monmouth-Ocean,NJ | 5190 | 118 | 0 | 7 | 98 | 36.0 | (29) | 27.0 | (29) | 38.5 | (30) | 30.0 | (30) | 33.5 | 36.39 | ±19.43
Nashville,TN | 5360 | 365 | 9 | 10 | 140 | 37.5 | (90) | 45.0 | (91) | 55.0 | (92) | 42.0 | (92) | 45.0 | 47.36 | ±20.39
Nassau-Suffolk,NY | 5380 | 124 | 1 | 5 | 101 | 39.0 | (32) | 29.0 | (31) | 41.0 | (30) | 32.0 | (31) | 33.5 | 38.89 | ±21.14
New Orleans,LA | 5560 | 350 | 3 | 7 | 138 | 33.5 | (90) | 39.0 | (91) | 45.0 | (78) | 53.0 | (91) | 42.0 | 43.78 | ±18.70
New York,NY | 5600 | 365 | 6 | 9 | 124 | 49.0 | (90) | 40.0 | (91) | 45.0 | (92) | 40.5 | (92) | 44.0 | 45.50 | ±21.70
Newark,NJ | 5640 | 336 | 8 | 7 | 116 | 47.0 | (82) | 41.0 | (87) | 52.0 | (83) | 38.5 | (84) | 44.5 | 46.81 | ±21.36
Norfolk-Virginia Beach-Newport News,VA_NC | 5720 | 328 | 0 | 6 | 97 | 41.0 | (79) | 37.5 | (86) | 49.0 | (73) | 30.5 | (90) | 38.5 | 39.96 | ±18.60
Oklahoma City,OK | 5880 | 365 | 0 | 5 | 89 | 31.5 | (90) | 33.0 | (91) | 36.0 | (92) | 26.5 | (92) | 31.0 | 34.62 | ±16.77
Omaha,NE-IA | 5920 | 352 | 1 | 7 | 123 | 40.0 | (86) | 29.0 | (87) | 32.0 | (89) | 25.0 | (90) | 32.0 | 36.34 | ±19.63
Orange County,CA | 5945 | 339 | 8 | 8 | 129 | 31.0 | (87) | 36.0 | (80) | 48.0 | (91) | 55.0 | (81) | 42.0 | 44.42 | ±21.07
Orlando,FL | 5960 | 363 | 2 | 9 | 113 | 32.0 | (89) | 26.0 | (91) | 31.0 | (91) | 27.0 | (92) | 29.0 | 31.94 | ±15.46
Philadelphia,PA-NJ | 6160 | 358 | 4 | 5 | 116 | 50.5 | (90) | 43.0 | (91) | 53.0 | (89) | 43.5 | (88) | 47.0 | 47.02 | ±21.33
Phoenix-Mesa,AZ | 6200 | 134 | 4 | 10 | 133 | 30.0 | (37) | 41.0 | (35) | 39.0 | (30) | 50.0 | (32) | 40.5 | 42.82 | ±20.46
Pittsburgh,PA | 6280 | 365 | 46 | 7 | 171 | 52.0 | (90) | 56.0 | (91) | 69.0 | (92) | 51.0 | (92) | 57.0 | 62.81 | ±33.39
Portland-Vancouver,OR-WA | 6440 | 122 | 3 | 6 | 150 | 50.5 | (30) | 18.0 | (31) | 22.5 | (30) | 54.0 | (31) | 27.0 | 36.23 | ±25.91
Provo-Orem,UT | 6520 | 348 | 3 | 3 | 139 | 30.0 | (82) | 19.0 | (90) | 26.0 | (89) | 25.0 | (87) | 25.0 | 31.03 | ±20.69
Raleigh-Durham-Chapel Hill,NC | 6640 | 364 | 1 | 8 | 102 | 38.0 | (90) | 46.0 | (91) | 57.5 | (92) | 38.0 | (91) | 44.0 | 45.00 | ±18.61
Rapid City,SD | 6660 | 125 | 0 | 15 | 88 | 29.0 | (30) | 25.0 | (33) | 29.0 | (31) | 26.0 | (31) | 27.0 | 29.36 | ±11.65
Reno,NV | 6720 | 123 | 3 | 6 | 146 | 27.0 | (31) | 16.5 | (32) | 22.0 | (30) | 23.0 | (30) | 20.0 | 27.17 | ±22.73
Richmond-Petersburg,VA | 6760 | 345 | 0 | 7 | 99 | 40.0 | (80) | 40.5 | (88) | 57.0 | (85) | 36.0 | (92) | 41.0 | 43.32 | ±18.73
Riverside-San Bernardino,CA | 6780 | 340 | 25 | 4 | 174 | 47.5 | (80) | 55.0 | (87) | 61.0 | (90) | 76.0 | (83) | 58.5 | 61.38 | ±27.49
St, Louis,MO-IL | 7040 | 365 | 13 | 11 | 116 | 55.0 | (90) | 52.0 | (91) | 58.0 | (92) | 49.0 | (92) | 53.0 | 54.01 | ±21.73
Salt Lake City-Ogden,UT | 7160 | 363 | 20 | 10 | 145 | 43.5 | (90) | 28.0 | (91) | 37.0 | (92) | 34.5 | (90) | 36.0 | 42.64 | ±25.48
San Diego,CA | 7320 | 361 | 3 | 7 | 108 | 34.0 | (90) | 35.0 | (91) | 43.0 | (91) | 56.0 | (89) | 42.0 | 43.24 | ±17.29
Santa Fe,NM | 7490 | 121 | 0 | 6 | 30 | 12.0 | (30) | 12.0 | (31) | 16.0 | (29) | 15.0 | (31) | 14.0 | 14.47 | ±5.47
Seattle-Bellevue-Everett,WA | 7600 | 362 | 1 | 8 | 104 | 32.5 | (90) | 21.0 | (90) | 26.0 | (90) | 31.0 | (92) | 25.5 | 30.59 | ±17.60
Sioux Falls,SD | 7760 | 126 | 0 | 10 | 79 | 37.0 | (32) | 30.0 | (33) | 31.0 | (30) | 26.0 | (31) | 30.5 | 34.45 | ±15.86
Spokane,WA | 7840 | 127 | 0 | 8 | 95 | 42.0 | (32) | 19.0 | (31) | 22.5 | (36) | 41.5 | (28) | 25.0 | 32.69 | ±20.93
Tacoma,WA | 8200 | 120 | 3 | 5 | 111 | 43.0 | (29) | 15.0 | (30) | 23.5 | (30) | 30.0 | (31) | 25.0 | 33.82 | ±26.20
Tampa-St. Petersburg-Clearwater,FL | 8280 | 365 | 3 | 13 | 108 | 35.0 | (90) | 35.0 | (91) | 36.0 | (92) | 33.5 | (92) | 35.0 | 37.36 | ±15.11
Topeka,KS | 8440 | 120 | 0 | 8 | 99 | 43.0 | (28) | 29.0 | (31) | 33.0 | (30) | 26.0 | (31) | 32.0 | 36.50 | ±18.49
Tucson,AZ | 8520 | 338 | 0 | 3 | 52 | 17.0 | (86) | 19.0 | (79) | 18.5 | (88) | 25.0 | (85) | 19.0 | 20.66 | ±7.26
Tulsa,OK | 8560 | 365 | 0 | 6 | 91 | 33.5 | (90) | 36.0 | (91) | 45.0 | (92) | 27.5 | (92) | 36.0 | 38.75 | ±18.55
Washington,DC-MD-VA-WV | 8840 | 365 | 4 | 6 | 110 | 48.0 | (90) | 44.0 | (91) | 61.5 | (92) | 42.0 | (92) | 49.0 | 48.99 | ±21.22
Wichita,KS | 9040 | 120 | 0 | 8 | 91 | 38.0 | (29) | 31.0 | (31) | 34.0 | (30) | 32.0 | (30) | 34.0 | 37.02 | ±17.74
Wilmington-Newark,DE-MD | 9160 | 354 | 2 | 6 | 116 | 52.0 | (88) | 40.0 | (89) | 54.0 | (90) | 40.0 | (87) | 45.0 | 46.47 | ±20.54
Wilmington,NC | 9200 | 114 | 0 | 7 | 98 | 28.5 | (30) | 29.5 | (28) | 32.0 | (28) | 24.5 | (28) | 27.0 | 32.37 | ±17.12