Daily report · most polluted
US air quality on 16 October 2026
Tucson Arizona307
HazardousUS AQI
Tucson had the most polluted air of 272 US cities
Updated · AirNow
At 4:00 pm ET on 16 October 2026, 272 US cities were reporting. Tucson had the most polluted air at US AQI 307 (Hazardous), followed by Yuma (188) and San Luis (188). The median across all cities was 31, down from 36 the day before. 4 cities were at Unhealthy or worse (0 the day before). Findlay had the cleanest air at 1.
The biggest deterioration was in Tucson, from 42 to 307. Oxnard improved most, from 136 to 40.
- Good 203
- Moderate 63
- Unhealthy for Sensitive Groups 2
- Unhealthy 3
- Hazardous 1
10 most polluted cities
| # | City | State | US AQI | Change |
|---|---|---|---|---|
| 1 | Tucson | Arizona | 307Hazardous | ▲ 265 |
| 2 | Yuma | Arizona | 188Unhealthy | ▲ 155 |
| 3 | San Luis | Arizona | 188Unhealthy | ▲ 155 |
| 4 | Gilbert | Arizona | 160Unhealthy | ▲ 122 |
| 5 | Phoenix | Arizona | 136Sensitive | ▲ 91 |
| 6 | Hanford | California | 124Sensitive | ▲ 37 |
| 7 | El Cajon | California | 95Moderate | ▲ 50 |
| 8 | Santa Maria | California | 85Moderate | ▲ 30 |
| 9 | Fresno | California | 82Moderate | ▲ 9 |
| 10 | San Francisco | California | 81Moderate | ▲ 24 |
10 cleanest cities
| # | City | State | US AQI | Change |
|---|---|---|---|---|
| 1 | Findlay | Ohio | 1Good | 0 |
| 2 | Aberdeen | South Dakota | 4Good | ▼ 24 |
| 3 | Dubuque | Iowa | 6Good | ▼ 1 |
| 4 | Eau Claire | Wisconsin | 6Good | ▼ 13 |
| 5 | Burlington | Vermont | 6Good | ▼ 2 |
| 6 | Grand Island | Nebraska | 7Good | ▼ 8 |
| 7 | Madison | Wisconsin | 8Good | ▼ 11 |
| 8 | Milwaukee | Wisconsin | 8Good | ▼ 20 |
| 9 | Erie | Pennsylvania | 9Good | ▼ 14 |
| 10 | Lorain | Ohio | 11Good | ▼ 12 |
Biggest rises
All 272 cities on 16 October 2026
| # | City | State | US AQI | Change |
|---|---|---|---|---|
| 1 | Tucson | Arizona | 307Hazardous | ▲ 265 |
| 2 | Yuma | Arizona | 188Unhealthy | ▲ 155 |
| 3 | San Luis | Arizona | 188Unhealthy | ▲ 155 |
| 4 | Gilbert | Arizona | 160Unhealthy | ▲ 122 |
| 5 | Phoenix | Arizona | 136Sensitive | ▲ 91 |
| 6 | Hanford | California | 124Sensitive | ▲ 37 |
| 7 | El Cajon | California | 95Moderate | ▲ 50 |
| 8 | Santa Maria | California | 85Moderate | ▲ 30 |
| 9 | Fresno | California | 82Moderate | ▲ 9 |
| 10 | San Francisco | California | 81Moderate | ▲ 24 |
| 11 | Fairbanks | Alaska | 76Moderate | ▲ 52 |
| 12 | Bakersfield | California | 75Moderate | ▲ 1 |
| 13 | Athens | Georgia | 75Moderate | ▲ 20 |
| 14 | Aiken | South Carolina | 73Moderate | ▲ 5 |
| 15 | Columbia | South Carolina | 72Moderate | ▲ 4 |
| 16 | Chattanooga | Tennessee | 72Moderate | ▲ 2 |
| 17 | Virginia Beach | Virginia | 70Moderate | ▲ 18 |
| 18 | Raleigh | North Carolina | 70Moderate | ▲ 6 |
| 19 | Eureka | California | 69Moderate | ▼ 6 |
| 20 | Las Cruces | New Mexico | 68Moderate | ▲ 31 |
| 21 | Augusta | Georgia | 68Moderate | ▲ 2 |
| 22 | Lewiston Orchards | Idaho | 68Moderate | ▼ 11 |
| 23 | Montgomery | Alabama | 67Moderate | 0 |
| 24 | Houma | Louisiana | 67Moderate | ▲ 23 |
| 25 | Atlanta | Georgia | 66Moderate | ▼ 1 |
| 26 | Seattle | Washington | 66Moderate | ▲ 13 |
| 27 | Huntsville | Alabama | 66Moderate | ▲ 3 |
| 28 | Wilmington | North Carolina | 66Moderate | ▼ 18 |
| 29 | Charlotte | North Carolina | 64Moderate | ▼ 7 |
| 30 | Anchorage | Alaska | 64Moderate | ▲ 20 |
| 31 | Corpus Christi | Texas | 64Moderate | ▲ 15 |
| 32 | Yakima | Washington | 64Moderate | ▲ 9 |
| 33 | El Paso | Texas | 63Moderate | ▼ 13 |
| 34 | Greensboro | North Carolina | 63Moderate | ▲ 24 |
| 35 | Knoxville | Tennessee | 63Moderate | ▲ 6 |
| 36 | Greenville | South Carolina | 63Moderate | ▲ 13 |
| 37 | Richmond | Virginia | 62Moderate | ▲ 8 |
| 38 | Fayetteville | North Carolina | 61Moderate | 0 |
| 39 | Columbus | Georgia | 59Moderate | ▼ 4 |
| 40 | Washington, D.C. | District of Columbia | 58Moderate | ▲ 30 |
| 41 | San Jose | California | 58Moderate | ▲ 1 |
| 42 | Kennewick | Washington | 58Moderate | ▲ 8 |
| 43 | Philadelphia | Pennsylvania | 56Moderate | ▲ 28 |
| 44 | Portland | Oregon | 56Moderate | ▲ 3 |
| 45 | Birmingham | Alabama | 55Moderate | ▼ 7 |
| 46 | Salt Lake City | Utah | 55Moderate | ▼ 2 |
| 47 | Los Angeles | California | 55Moderate | ▲ 1 |
| 48 | Wenatchee | Washington | 55Moderate | ▲ 12 |
| 49 | Wilmington | Delaware | 54Moderate | ▲ 23 |
| 50 | Charleston | South Carolina | 54Moderate | ▲ 3 |
| 51 | New York City | New York | 53Moderate | ▲ 29 |
| 52 | Charleston | West Virginia | 53Moderate | ▲ 35 |
| 53 | Savannah | Georgia | 53Moderate | ▲ 8 |
| 54 | Roanoke | Virginia | 53Moderate | ▲ 7 |
| 55 | Harrisonburg | Virginia | 53Moderate | ▲ 18 |
| 56 | Newark | New Jersey | 52Moderate | ▲ 25 |
| 57 | Baltimore | Maryland | 52Moderate | ▲ 30 |
| 58 | San Antonio | Texas | 52Moderate | 0 |
| 59 | San Diego | California | 52Moderate | ▼ 13 |
| 60 | Sacramento | California | 52Moderate | ▼ 5 |
| 61 | Columbia | Maryland | 52Moderate | ▲ 30 |
| 62 | Asheville | North Carolina | 52Moderate | ▲ 5 |
| 63 | Twin Falls | Idaho | 52Moderate | ▲ 3 |
| 64 | Hattiesburg | Mississippi | 52Moderate | ▼ 10 |
| 65 | Rancho Palos Verdes | California | 52Moderate | ▲ 5 |
| 66 | Prescott Valley | Arizona | 52Moderate | ▼ 9 |
| 67 | San Mateo | California | 51Moderate | ▼ 3 |
| 68 | Chico | California | 51Moderate | ▼ 5 |
| 69 | Winchester | Virginia | 51Moderate | ▲ 28 |
| 70 | Baton Rouge | Louisiana | 50Good | ▼ 11 |
| 71 | Salem | Oregon | 49Good | ▲ 22 |
| 72 | Port Arthur | Texas | 48Good | ▲ 4 |
| 73 | Cleveland | Tennessee | 47Good | ▲ 2 |
| 74 | Brownsville | Texas | 44Good | 0 |
| 75 | Kingsport | Tennessee | 44Good | ▲ 9 |
| 76 | Greenville | North Carolina | 43Good | ▼ 3 |
| 77 | Hilo | Hawaii | 43Good | ▲ 5 |
| 78 | Myrtle Beach | South Carolina | 43Good | ▼ 4 |
| 79 | Tuscaloosa | Alabama | 42Good | ▼ 3 |
| 80 | Auburn | Alabama | 42Good | ▼ 1 |
| 81 | Pullman | Washington | 42Good | ▲ 8 |
| 82 | Reedley | California | 42Good | ▲ 10 |
| 83 | New Orleans | Louisiana | 41Good | ▼ 17 |
| 84 | Reno | Nevada | 41Good | ▼ 12 |
| 85 | Spokane | Washington | 41Good | ▼ 14 |
| 86 | Beaumont | Texas | 41Good | ▼ 1 |
| 87 | Redding | California | 41Good | ▲ 3 |
| 88 | Gulfport | Mississippi | 41Good | ▼ 7 |
| 89 | Jacksonville | Florida | 40Good | ▼ 6 |
| 90 | Oxnard | California | 40Good | ▼ 96 |
| 91 | Houston | Texas | 39Good | ▼ 22 |
| 92 | Denver | Colorado | 39Good | ▲ 8 |
| 93 | Albuquerque | New Mexico | 39Good | ▼ 1 |
| 94 | Rio Rancho | New Mexico | 39Good | ▼ 1 |
| 95 | Bellingham | Washington | 39Good | ▲ 12 |
| 96 | Albany | Georgia | 39Good | ▼ 17 |
| 97 | Billings | Montana | 38Good | ▲ 9 |
| 98 | Eugene | Oregon | 38Good | ▼ 20 |
| 99 | Gainesville | Florida | 38Good | ▲ 7 |
| 100 | Flagstaff | Arizona | 38Good | ▼ 3 |
| 101 | Marysville | Washington | 38Good | ▲ 2 |
| 102 | Palm Springs | California | 38Good | ▼ 4 |
| 103 | Navarre | Florida | 38Good | ▼ 2 |
| 104 | Cedar City | Utah | 38Good | ▲ 7 |
| 105 | Austin | Texas | 37Good | ▼ 18 |
| 106 | Orlando | Florida | 37Good | ▲ 1 |
| 107 | Tallahassee | Florida | 37Good | ▼ 2 |
| 108 | Deltona | Florida | 37Good | ▲ 1 |
| 109 | Lake Charles | Louisiana | 37Good | ▼ 2 |
| 110 | Las Vegas | Nevada | 36Good | 0 |
| 111 | Mobile | Alabama | 36Good | ▼ 16 |
| 112 | Allentown | Pennsylvania | 36Good | ▲ 9 |
| 113 | Medford | Oregon | 36Good | ▼ 2 |
| 114 | Carlsbad | New Mexico | 36Good | ▼ 6 |
| 115 | Saint George | Utah | 35Good | ▲ 3 |
| 116 | Coeur d'Alene | Idaho | 35Good | ▼ 1 |
| 117 | Jackson | Mississippi | 34Good | ▼ 28 |
| 118 | Boise | Idaho | 34Good | ▲ 4 |
| 119 | Santa Fe | New Mexico | 34Good | ▼ 3 |
| 120 | Lafayette | Indiana | 34Good | ▼ 4 |
| 121 | Idaho Falls | Idaho | 34Good | ▲ 16 |
| 122 | Rexburg | Idaho | 34Good | ▲ 16 |
| 123 | Cheyenne | Wyoming | 33Good | ▲ 5 |
| 124 | Colorado Springs | Colorado | 33Good | ▲ 1 |
| 125 | Grand Rapids | Michigan | 33Good | ▼ 9 |
| 126 | McAllen | Texas | 33Good | ▼ 7 |
| 127 | Missoula | Montana | 33Good | ▼ 2 |
| 128 | Panama City | Florida | 33Good | ▼ 1 |
| 129 | Provo | Utah | 32Good | ▼ 22 |
| 130 | Grand Junction | Colorado | 32Good | ▲ 2 |
| 131 | Farmington | New Mexico | 32Good | ▲ 1 |
| 132 | Sumter | South Carolina | 32Good | ▼ 9 |
| 133 | Hobbs | New Mexico | 32Good | ▲ 1 |
| 134 | Omaha | Nebraska | 31Good | ▲ 18 |
| 135 | Lynchburg | Virginia | 31Good | ▲ 12 |
| 136 | Pleasant Grove | Utah | 31Good | ▼ 23 |
| 137 | Indianapolis | Indiana | 30Good | ▼ 28 |
| 138 | Dallas | Texas | 30Good | ▼ 17 |
| 139 | Tampa | Florida | 30Good | ▼ 13 |
| 140 | Shreveport | Louisiana | 30Good | ▼ 15 |
| 141 | Waco | Texas | 30Good | ▼ 9 |
| 142 | Bridgeport | Connecticut | 29Good | ▲ 4 |
| 143 | Fort Lauderdale | Florida | 29Good | ▲ 6 |
| 144 | Tyler | Texas | 29Good | ▼ 7 |
| 145 | The Woodlands | Texas | 29Good | ▼ 22 |
| 146 | Middletown | Connecticut | 29Good | 0 |
| 147 | Weatherford | Texas | 29Good | ▼ 1 |
| 148 | Boston | Massachusetts | 27Good | ▼ 3 |
| 149 | Memphis | Tennessee | 27Good | ▼ 24 |
| 150 | Cape Coral | Florida | 27Good | ▼ 3 |
| 151 | Flint | Michigan | 27Good | ▼ 4 |
| 152 | Lehigh Acres | Florida | 27Good | ▼ 3 |
| 153 | Waterloo | Iowa | 27Good | ▲ 15 |
| 154 | Saint Cloud | Minnesota | 27Good | ▼ 1 |
| 155 | Southaven | Mississippi | 27Good | ▼ 27 |
| 156 | Collierville | Tennessee | 27Good | ▼ 24 |
| 157 | State College | Pennsylvania | 27Good | ▼ 2 |
| 158 | North Kingstown | Rhode Island | 27Good | ▼ 5 |
| 159 | Greenville | Texas | 27Good | ▼ 9 |
| 160 | Portland | Maine | 26Good | ▼ 2 |
| 161 | Sioux Falls | South Dakota | 26Good | ▲ 3 |
| 162 | Miami | Florida | 26Good | ▲ 4 |
| 163 | St. Louis | Missouri | 26Good | ▼ 28 |
| 164 | Pittsburgh | Pennsylvania | 26Good | 0 |
| 165 | Lincoln | Nebraska | 26Good | ▲ 19 |
| 166 | Louisville | Kentucky | 26Good | ▼ 44 |
| 167 | Palm Bay | Florida | 26Good | ▼ 7 |
| 168 | Fort Smith | Arkansas | 26Good | ▼ 3 |
| 169 | Sioux City | Iowa | 26Good | ▲ 19 |
| 170 | Altoona | Pennsylvania | 26Good | ▲ 1 |
| 171 | Annapolis | Maryland | 26Good | ▲ 4 |
| 172 | Morgantown | West Virginia | 26Good | ▲ 13 |
| 173 | Elmira | New York | 26Good | ▲ 3 |
| 174 | Pleasure Ridge Park | Kentucky | 26Good | ▼ 44 |
| 175 | Providence | Rhode Island | 25Good | ▼ 6 |
| 176 | Chicago | Illinois | 25Good | ▼ 32 |
| 177 | Laredo | Texas | 25Good | ▼ 27 |
| 178 | Casper | Wyoming | 25Good | ▼ 6 |
| 179 | Wichita | Kansas | 24Good | ▲ 14 |
| 180 | Minneapolis | Minnesota | 24Good | ▼ 21 |
| 181 | Fargo | North Dakota | 24Good | ▲ 5 |
| 182 | Ironville | Kentucky | 24Good | ▼ 24 |
| 183 | Worcester | Massachusetts | 24Good | ▼ 6 |
| 184 | Topeka | Kansas | 24Good | ▲ 4 |
| 185 | Bismarck | North Dakota | 24Good | ▼ 2 |
| 186 | Jackson | Tennessee | 24Good | ▼ 27 |
| 187 | Kansas City | Missouri | 23Good | ▼ 6 |
| 188 | Oklahoma City | Oklahoma | 23Good | ▼ 5 |
| 189 | Tulsa | Oklahoma | 23Good | ▼ 7 |
| 190 | Cleveland | Ohio | 23Good | ▼ 24 |
| 191 | Overland Park | Kansas | 23Good | ▼ 6 |
| 192 | Springfield | Missouri | 23Good | ▼ 6 |
| 193 | Norman | Oklahoma | 23Good | ▲ 4 |
| 194 | Rochester | Minnesota | 23Good | ▲ 9 |
| 195 | South Bend | Indiana | 23Good | ▼ 2 |
| 196 | Duluth | Minnesota | 23Good | ▲ 4 |
| 197 | Rapid City | South Dakota | 23Good | ▼ 10 |
| 198 | Victoria | Texas | 23Good | ▼ 19 |
| 199 | Bowling Green | Kentucky | 23Good | ▼ 23 |
| 200 | Monroe | Louisiana | 23Good | ▼ 31 |
| 201 | Binghamton | New York | 23Good | ▲ 15 |
| 202 | Mankato | Minnesota | 23Good | ▼ 3 |
| 203 | Manchester | New Hampshire | 22Good | ▼ 10 |
| 204 | Little Rock | Arkansas | 22Good | ▼ 33 |
| 205 | Lansing | Michigan | 22Good | ▼ 6 |
| 206 | Bend | Oregon | 22Good | ▼ 34 |
| 207 | Champaign | Illinois | 22Good | ▼ 34 |
| 208 | Conway | Arkansas | 22Good | ▼ 33 |
| 209 | Minot | North Dakota | 22Good | ▲ 3 |
| 210 | Concord | New Hampshire | 22Good | ▼ 10 |
| 211 | Gillette | Wyoming | 22Good | ▼ 44 |
| 212 | Saratoga Springs | New York | 22Good | ▼ 7 |
| 213 | Detroit | Michigan | 21Good | ▼ 23 |
| 214 | Nashville | Tennessee | 21Good | ▼ 37 |
| 215 | Cincinnati | Ohio | 21Good | ▼ 36 |
| 216 | Springfield | Illinois | 21Good | ▼ 17 |
| 217 | Muskegon | Michigan | 21Good | 0 |
| 218 | Bangor | Maine | 21Good | ▼ 3 |
| 219 | Kingsville | Texas | 21Good | ▼ 23 |
| 220 | Great Falls | Montana | 20Good | ▲ 6 |
| 221 | Bartlesville | Oklahoma | 20Good | ▼ 1 |
| 222 | Columbus | Ohio | 19Good | ▼ 35 |
| 223 | Des Moines | Iowa | 19Good | ▲ 5 |
| 224 | Lexington-Fayette | Kentucky | 19Good | 0 |
| 225 | Honolulu | Hawaii | 19Good | ▲ 2 |
| 226 | Toledo | Ohio | 19Good | ▼ 13 |
| 227 | Rochester | New York | 19Good | ▼ 10 |
| 228 | Rockford | Illinois | 19Good | ▼ 19 |
| 229 | Midland | Texas | 19Good | new |
| 230 | Evansville | Indiana | 19Good | ▼ 33 |
| 231 | Albany | New York | 19Good | ▼ 10 |
| 232 | Lawrence | Kansas | 19Good | ▲ 11 |
| 233 | Mentor | Ohio | 19Good | ▼ 14 |
| 234 | Bozeman | Montana | 19Good | ▼ 24 |
| 235 | Cape Girardeau | Missouri | 19Good | ▼ 2 |
| 236 | Parkersburg | West Virginia | 19Good | ▲ 5 |
| 237 | Port Huron | Michigan | 19Good | ▼ 12 |
| 238 | Carbondale | Illinois | 19Good | ▼ 2 |
| 239 | Fort Wayne | Indiana | 18Good | ▼ 14 |
| 240 | Buffalo | New York | 18Good | ▼ 10 |
| 241 | Clarksville | Tennessee | 18Good | ▼ 18 |
| 242 | Dayton | Ohio | 18Good | ▼ 18 |
| 243 | Joplin | Missouri | 18Good | ▼ 47 |
| 244 | Niagara Falls | New York | 18Good | ▼ 10 |
| 245 | Redmond | Oregon | 18Good | ▲ 3 |
| 246 | Joliet | Illinois | 17Good | ▼ 14 |
| 247 | Peoria | Illinois | 17Good | ▼ 34 |
| 248 | Jefferson City | Missouri | 17Good | ▲ 2 |
| 249 | Kahului | Hawaii | 17Good | ▼ 10 |
| 250 | Syracuse | New York | 16Good | ▼ 11 |
| 251 | Davenport | Iowa | 16Good | ▼ 34 |
| 252 | Kingman | Arizona | 16Good | ▼ 20 |
| 253 | Cedar Rapids | Iowa | 15Good | ▼ 38 |
| 254 | Columbia | Missouri | 15Good | ▲ 2 |
| 255 | Amarillo | Texas | 14Good | ▲ 5 |
| 256 | Pocatello | Idaho | 14Good | ▼ 9 |
| 257 | Quincy | Illinois | 14Good | ▲ 6 |
| 258 | Ridgecrest | California | 14Good | ▼ 38 |
| 259 | Utica | New York | 13Good | new |
| 260 | Pahrump | Nevada | 13Good | ▲ 1 |
| 261 | Butte | Montana | 13Good | ▲ 6 |
| 262 | Juneau | Alaska | 12Good | new |
| 263 | Lorain | Ohio | 11Good | ▼ 12 |
| 264 | Erie | Pennsylvania | 9Good | ▼ 14 |
| 265 | Milwaukee | Wisconsin | 8Good | ▼ 20 |
| 266 | Madison | Wisconsin | 8Good | ▼ 11 |
| 267 | Grand Island | Nebraska | 7Good | ▼ 8 |
| 268 | Burlington | Vermont | 6Good | ▼ 2 |
| 269 | Eau Claire | Wisconsin | 6Good | ▼ 13 |
| 270 | Dubuque | Iowa | 6Good | ▼ 1 |
| 271 | Aberdeen | South Dakota | 4Good | ▼ 24 |
| 272 | Findlay | Ohio | 1Good | 0 |
Snapshot taken at 4:00 pm ET from US EPA AirNow. Values are the latest hourly readings at that time, not daily averages. Cities with no reading are left out.