#1: Urban Honolulu, HI #2: Kahului-Wailuku-Lahaina, HI #3: Cheyenne, WY #4: Elmira-Corning, NY #5: Wilmington, NC #6: Casper, WY #7: Bellingham, WA #7: Syracuse-Auburn, NY #9: Duluth, MN-WI #9: Springfield, MA #9: St. George, UT #12: Bismarck, ND #13: Pueblo-Canon City, CO #14: Burlington-South Burlington-Barre, VT #14: Palm Bay-Melbourne-Titusville, FL #16: Anchorage, AK #16: Bangor, ME #18: Grand Island, NE #18: Grand Junction, CO #18: Pittsfield, MA #18: Sioux Falls, SD #22: Colorado Springs, CO #23: Appleton-Oshkosh-Neenah, WI #23: Gainesville-Lake City, FL #23: Salinas, CA
#2: Kahului-Wailuku-Lahaina, HI
#3: Cheyenne, WY
#4: Elmira-Corning, NY
#5: Wilmington, NC
#6: Casper, WY
#7: Bellingham, WA
#7: Syracuse-Auburn, NY
#9: Duluth, MN-WI
#9: Springfield, MA
#9: St. George, UT
#12: Bismarck, ND
#13: Pueblo-Canon City, CO
#14: Burlington-South Burlington-Barre, VT
#14: Palm Bay-Melbourne-Titusville, FL
#16: Anchorage, AK
#16: Bangor, ME
#18: Grand Island, NE
#18: Grand Junction, CO
#18: Pittsfield, MA
#18: Sioux Falls, SD
#22: Colorado Springs, CO
#23: Appleton-Oshkosh-Neenah, WI
#23: Gainesville-Lake City, FL
#23: Salinas, CA
https://www.stateoftheair.org/city-rankings/cleanest-cities.html