Updated April 2026
Air Quality Answers
A direct answer for each of the 1,020 cities tracked here, drawn from ten years of EPA Air Quality System monitoring: the median AQI, the dominant pollutant, how many unhealthy-air days the city records, and whether the trend is improving or worsening. Every city also has a full side-by-side comparison and a ten-year detail page.
Alabama
- Baldwin, Alabama (Grade B)
- Clay, Alabama (Grade B)
- Colbert, Alabama (Grade B)
- DeKalb, Alabama (Grade C)
- Elmore, Alabama (Grade B)
- Etowah, Alabama (Grade B)
- Houston, Alabama (Grade B)
- Jefferson, Alabama (Grade C)
- Lawrence, Alabama (Grade B)
- Madison, Alabama (Grade C)
- Mobile, Alabama (Grade C)
- Montgomery, Alabama (Grade C)
- Morgan, Alabama (Grade C)
- Russell, Alabama (Grade B)
- Shelby, Alabama (Grade B)
- Sumter, Alabama (Grade B)
- Tuscaloosa, Alabama (Grade A)
Alaska
- Aleutians East, Alaska (Grade B)
- Anchorage, Alaska (Grade A)
- Denali, Alaska (Grade B)
- Fairbanks North Star, Alaska (Grade C)
- Juneau, Alaska (Grade A)
- Kenai Peninsula, Alaska (Grade B)
- Matanuska-Susitna, Alaska (Grade A)
- North Slope, Alaska (Grade A)
Arizona
- Apache, Arizona (Grade A)
- Cochise, Arizona (Grade B)
- Coconino, Arizona (Grade C)
- Gila, Arizona (Grade C)
- La Paz, Arizona (Grade C)
- Maricopa, Arizona (Grade F)
- Mohave, Arizona (Grade B)
- Navajo, Arizona (Grade C)
- Pima, Arizona (Grade C)
- Pinal, Arizona (Grade D)
- Santa Cruz, Arizona (Grade C)
- Yavapai, Arizona (Grade B)
- Yuma, Arizona (Grade C)
Arkansas
- Arkansas, Arkansas (Grade B)
- Ashley, Arkansas (Grade B)
- Clark, Arkansas (Grade B)
- Crittenden, Arkansas (Grade C)
- Garland, Arkansas (Grade B)
- Jackson, Arkansas (Grade B)
- Newton, Arkansas (Grade B)
- Polk, Arkansas (Grade B)
- Pulaski, Arkansas (Grade C)
- Union, Arkansas (Grade C)
- Washington, Arkansas (Grade C)
California
- Alameda, California (Grade C)
- Amador, California (Grade B)
- Butte, California (Grade C)
- Calaveras, California (Grade B)
- Colusa, California (Grade C)
- Contra Costa, California (Grade C)
- Del Norte, California (Grade C)
- El Dorado, California (Grade C)
- Fresno, California (Grade D)
- Glenn, California (Grade C)
- Humboldt, California (Grade A)
- Imperial, California (Grade D)
- Inyo, California (Grade F)
- Kern, California (Grade D)
- Kings, California (Grade D)
- Lake, California (Grade B)
- Los Angeles, California (Grade D)
- Madera, California (Grade C)
- Marin, California (Grade B)
- Mariposa, California (Grade C)
- Mendocino, California (Grade C)
- Merced, California (Grade C)
- Mono, California (Grade D)
- Monterey, California (Grade C)
- Napa, California (Grade B)
- Nevada, California (Grade C)
- Orange, California (Grade C)
- Placer, California (Grade D)
- Plumas, California (Grade D)
- Riverside, California (Grade D)
- Sacramento, California (Grade C)
- San Benito, California (Grade C)
- San Bernardino, California (Grade F)
- San Diego, California (Grade D)
- San Francisco, California (Grade B)
- San Joaquin, California (Grade C)
- San Luis Obispo, California (Grade C)
- San Mateo, California (Grade B)
- Santa Barbara, California (Grade B)
- Santa Clara, California (Grade C)
- Santa Cruz, California (Grade B)
- Shasta, California (Grade C)
- Siskiyou, California (Grade D)
- Solano, California (Grade B)
- Sonoma, California (Grade B)
- Stanislaus, California (Grade D)
- Sutter, California (Grade C)
- Tehama, California (Grade C)
- Trinity, California (Grade C)
- Tulare, California (Grade D)
- Tuolumne, California (Grade B)
- Ventura, California (Grade C)
- Yolo, California (Grade B)
Colorado
- Adams, Colorado (Grade C)
- Alamosa, Colorado (Grade A)
- Arapahoe, Colorado (Grade C)
- Archuleta, Colorado (Grade C)
- Boulder, Colorado (Grade D)
- Chaffee, Colorado (Grade C)
- Clear Creek, Colorado (Grade C)
- Delta, Colorado (Grade C)
- Denver, Colorado (Grade C)
- Douglas, Colorado (Grade D)
- El Paso, Colorado (Grade C)
- Fremont, Colorado (Grade A)
- Garfield, Colorado (Grade C)
- Gilpin, Colorado (Grade C)
- Grand, Colorado (Grade C)
- Gunnison, Colorado (Grade C)
- Jackson, Colorado (Grade B)
- Jefferson, Colorado (Grade D)
- La Plata, Colorado (Grade C)
- Larimer, Colorado (Grade C)
- Mesa, Colorado (Grade B)
- Moffat, Colorado (Grade C)
- Montezuma, Colorado (Grade C)
- Park, Colorado (Grade C)
- Pitkin, Colorado (Grade B)
- Prowers, Colorado (Grade B)
- Pueblo, Colorado (Grade B)
- Rio Blanco, Colorado (Grade C)
- Routt, Colorado (Grade A)
- San Juan, Colorado (Grade B)
- San Miguel, Colorado (Grade C)
- Weld, Colorado (Grade D)
Connecticut
- Fairfield, Connecticut (Grade C)
- Hartford, Connecticut (Grade B)
- Litchfield, Connecticut (Grade B)
- Middlesex, Connecticut (Grade B)
- New Haven, Connecticut (Grade C)
- New London, Connecticut (Grade C)
- Tolland, Connecticut (Grade B)
- Windham, Connecticut (Grade B)
Country Of Mexico
- BAJA CALIFORNIA NORTE, Country Of Mexico (Grade F)
- SONORA, Country Of Mexico (Grade D)
Delaware
- Kent, Delaware (Grade B)
- New Castle, Delaware (Grade C)
- Sussex, Delaware (Grade B)
District Of Columbia
Florida
- Alachua, Florida (Grade B)
- Baker, Florida (Grade C)
- Bay, Florida (Grade C)
- Brevard, Florida (Grade C)
- Broward, Florida (Grade C)
- Citrus, Florida (Grade C)
- Collier, Florida (Grade C)
- Columbia, Florida (Grade C)
- Duval, Florida (Grade C)
- Escambia, Florida (Grade C)
- Flagler, Florida (Grade B)
- Hamilton, Florida (Grade C)
- Highlands, Florida (Grade B)
- Hillsborough, Florida (Grade C)
- Holmes, Florida (Grade C)
- Indian River, Florida (Grade B)
- Lake, Florida (Grade B)
- Lee, Florida (Grade B)
- Leon, Florida (Grade B)
- Liberty, Florida (Grade B)
- Manatee, Florida (Grade B)
- Marion, Florida (Grade C)
- Martin, Florida (Grade C)
- Miami-Dade, Florida (Grade B)
- Nassau, Florida (Grade B)
- Okaloosa, Florida (Grade B)
- Orange, Florida (Grade B)
- Osceola, Florida (Grade B)
- Palm Beach, Florida (Grade B)
- Pasco, Florida (Grade B)
- Pinellas, Florida (Grade C)
- Polk, Florida (Grade B)
- Putnam, Florida (Grade B)
- Santa Rosa, Florida (Grade C)
- Sarasota, Florida (Grade B)
- Seminole, Florida (Grade C)
- St. Lucie, Florida (Grade B)
- Volusia, Florida (Grade C)
- Wakulla, Florida (Grade C)
Georgia
- Bibb, Georgia (Grade C)
- Charlton, Georgia (Grade B)
- Chatham, Georgia (Grade C)
- Chattooga, Georgia (Grade B)
- Clarke, Georgia (Grade C)
- Clayton, Georgia (Grade B)
- Cobb, Georgia (Grade B)
- Coffee, Georgia (Grade B)
- Columbia, Georgia (Grade B)
- Dawson, Georgia (Grade B)
- DeKalb, Georgia (Grade C)
- Dougherty, Georgia (Grade C)
- Douglas, Georgia (Grade B)
- Floyd, Georgia (Grade B)
- Fulton, Georgia (Grade C)
- Glynn, Georgia (Grade B)
- Gwinnett, Georgia (Grade C)
- Hall, Georgia (Grade C)
- Henry, Georgia (Grade B)
- Houston, Georgia (Grade C)
- Lowndes, Georgia (Grade B)
- Murray, Georgia (Grade B)
- Muscogee, Georgia (Grade C)
- Pike, Georgia (Grade B)
- Richmond, Georgia (Grade C)
- Rockdale, Georgia (Grade C)
- Sumter, Georgia (Grade B)
- Walker, Georgia (Grade C)
- Washington, Georgia (Grade C)
Hawaii
- Hawaii, Hawaii (Grade A)
- Honolulu, Hawaii (Grade B)
- Kauai, Hawaii (Grade A)
- Maui, Hawaii (Grade A)
Idaho
- Ada, Idaho (Grade C)
- Bannock, Idaho (Grade C)
- Benewah, Idaho (Grade C)
- Blaine, Idaho (Grade C)
- Boise, Idaho (Grade C)
- Bonner, Idaho (Grade C)
- Bonneville, Idaho (Grade B)
- Butte, Idaho (Grade C)
- Canyon, Idaho (Grade C)
- Custer, Idaho (Grade A)
- Franklin, Idaho (Grade B)
- Idaho, Idaho (Grade C)
- Jerome, Idaho (Grade B)
- Kootenai, Idaho (Grade B)
- Latah, Idaho (Grade B)
- Lemhi, Idaho (Grade B)
- Nez Perce, Idaho (Grade C)
- Shoshone, Idaho (Grade B)
- Twin Falls, Idaho (Grade B)
- Valley, Idaho (Grade D)
Illinois
- Adams, Illinois (Grade C)
- Champaign, Illinois (Grade C)
- Clark, Illinois (Grade B)
- Cook, Illinois (Grade D)
- DuPage, Illinois (Grade D)
- Effingham, Illinois (Grade B)
- Hamilton, Illinois (Grade C)
- Jersey, Illinois (Grade C)
- Jo Daviess, Illinois (Grade B)
- Kane, Illinois (Grade C)
- Lake, Illinois (Grade C)
- Macon, Illinois (Grade C)
- Macoupin, Illinois (Grade B)
- Madison, Illinois (Grade C)
- McHenry, Illinois (Grade C)
- McLean, Illinois (Grade D)
- Peoria, Illinois (Grade C)
- Randolph, Illinois (Grade C)
- Rock Island, Illinois (Grade D)
- Saint Clair, Illinois (Grade C)
- Sangamon, Illinois (Grade D)
- Will, Illinois (Grade C)
- Winnebago, Illinois (Grade D)
Indiana
- Allen, Indiana (Grade B)
- Bartholomew, Indiana (Grade B)
- Boone, Indiana (Grade B)
- Brown, Indiana (Grade B)
- Carroll, Indiana (Grade B)
- Clark, Indiana (Grade C)
- Delaware, Indiana (Grade B)
- Dubois, Indiana (Grade B)
- Elkhart, Indiana (Grade B)
- Floyd, Indiana (Grade A)
- Greene, Indiana (Grade B)
- Hamilton, Indiana (Grade C)
- Hendricks, Indiana (Grade B)
- Henry, Indiana (Grade B)
- Howard, Indiana (Grade B)
- Huntington, Indiana (Grade B)
- Jackson, Indiana (Grade A)
- Knox, Indiana (Grade C)
- Lake, Indiana (Grade C)
- LaPorte, Indiana (Grade B)
- Madison, Indiana (Grade C)
- Marion, Indiana (Grade C)
- Monroe, Indiana (Grade C)
- Morgan, Indiana (Grade A)
- Perry, Indiana (Grade B)
- Porter, Indiana (Grade C)
- Posey, Indiana (Grade B)
- Shelby, Indiana (Grade B)
- Spencer, Indiana (Grade B)
- St. Joseph, Indiana (Grade C)
- Tippecanoe, Indiana (Grade B)
- Vanderburgh, Indiana (Grade C)
- Vigo, Indiana (Grade C)
- Wabash, Indiana (Grade B)
- Warrick, Indiana (Grade B)
- Whitley, Indiana (Grade C)
Iowa
- Black Hawk, Iowa (Grade B)
- Bremer, Iowa (Grade C)
- Cerro Gordo, Iowa (Grade B)
- Clinton, Iowa (Grade C)
- Harrison, Iowa (Grade C)
- Johnson, Iowa (Grade C)
- Lee, Iowa (Grade B)
- Linn, Iowa (Grade C)
- Montgomery, Iowa (Grade B)
- Muscatine, Iowa (Grade B)
- Palo Alto, Iowa (Grade B)
- Polk, Iowa (Grade C)
- Pottawattamie, Iowa (Grade C)
- Scott, Iowa (Grade B)
- Van Buren, Iowa (Grade B)
- Woodbury, Iowa (Grade C)
Kansas
- Chase, Kansas (Grade B)
- Ford, Kansas (Grade B)
- Johnson, Kansas (Grade C)
- Leavenworth, Kansas (Grade B)
- Neosho, Kansas (Grade D)
- Sedgwick, Kansas (Grade C)
- Shawnee, Kansas (Grade C)
- Sherman, Kansas (Grade B)
- Sumner, Kansas (Grade C)
- Trego, Kansas (Grade C)
- Wyandotte, Kansas (Grade C)
Kentucky
- Bell, Kentucky (Grade C)
- Boone, Kentucky (Grade C)
- Boyd, Kentucky (Grade B)
- Bullitt, Kentucky (Grade C)
- Campbell, Kentucky (Grade B)
- Carter, Kentucky (Grade B)
- Christian, Kentucky (Grade C)
- Daviess, Kentucky (Grade C)
- Edmonson, Kentucky (Grade B)
- Fayette, Kentucky (Grade C)
- Greenup, Kentucky (Grade B)
- Hancock, Kentucky (Grade B)
- Hardin, Kentucky (Grade B)
- Henderson, Kentucky (Grade D)
- Jefferson, Kentucky (Grade C)
- Jessamine, Kentucky (Grade B)
- Livingston, Kentucky (Grade B)
- McCracken, Kentucky (Grade C)
- Morgan, Kentucky (Grade B)
- Oldham, Kentucky (Grade B)
- Perry, Kentucky (Grade B)
- Pike, Kentucky (Grade B)
- Pulaski, Kentucky (Grade C)
- Simpson, Kentucky (Grade B)
- Trigg, Kentucky (Grade B)
- Warren, Kentucky (Grade C)
- Washington, Kentucky (Grade B)
Louisiana
- Ascension, Louisiana (Grade B)
- Bossier, Louisiana (Grade C)
- Caddo, Louisiana (Grade B)
- Calcasieu, Louisiana (Grade C)
- East Baton Rouge, Louisiana (Grade B)
- Iberville, Louisiana (Grade C)
- Jefferson, Louisiana (Grade C)
- Lafayette, Louisiana (Grade B)
- Lafourche, Louisiana (Grade C)
- Livingston, Louisiana (Grade C)
- Orleans, Louisiana (Grade B)
- Ouachita, Louisiana (Grade B)
- Pointe Coupee, Louisiana (Grade B)
- Rapides, Louisiana (Grade B)
- St. Bernard, Louisiana (Grade C)
- St. James, Louisiana (Grade B)
- St. John the Baptist, Louisiana (Grade B)
- St. Martin, Louisiana (Grade B)
- St. Tammany, Louisiana (Grade B)
- Tangipahoa, Louisiana (Grade B)
- Terrebonne, Louisiana (Grade C)
- West Baton Rouge, Louisiana (Grade C)
Maine
- Androscoggin, Maine (Grade B)
- Aroostook, Maine (Grade B)
- Cumberland, Maine (Grade B)
- Hancock, Maine (Grade B)
- Kennebec, Maine (Grade B)
- Knox, Maine (Grade B)
- Oxford, Maine (Grade B)
- Penobscot, Maine (Grade B)
- Washington, Maine (Grade B)
- York, Maine (Grade B)
Maryland
- Anne Arundel, Maryland (Grade B)
- Baltimore (City), Maryland (Grade B)
- Baltimore, Maryland (Grade C)
- Calvert, Maryland (Grade B)
- Carroll, Maryland (Grade B)
- Cecil, Maryland (Grade B)
- Charles, Maryland (Grade B)
- Dorchester, Maryland (Grade B)
- Frederick, Maryland (Grade B)
- Garrett, Maryland (Grade B)
- Harford, Maryland (Grade B)
- Howard, Maryland (Grade B)
- Kent, Maryland (Grade B)
- Montgomery, Maryland (Grade B)
- Prince George's, Maryland (Grade B)
- Washington, Maryland (Grade B)
Massachusetts
- Barnstable, Massachusetts (Grade B)
- Berkshire, Massachusetts (Grade B)
- Bristol, Massachusetts (Grade B)
- Dukes, Massachusetts (Grade C)
- Essex, Massachusetts (Grade B)
- Franklin, Massachusetts (Grade C)
- Hampden, Massachusetts (Grade C)
- Hampshire, Massachusetts (Grade B)
- Middlesex, Massachusetts (Grade C)
- Norfolk, Massachusetts (Grade B)
- Plymouth, Massachusetts (Grade C)
- Suffolk, Massachusetts (Grade B)
- Worcester, Massachusetts (Grade C)
Michigan
- Allegan, Michigan (Grade B)
- Bay, Michigan (Grade B)
- Benzie, Michigan (Grade B)
- Berrien, Michigan (Grade B)
- Cass, Michigan (Grade B)
- Chippewa, Michigan (Grade C)
- Clinton, Michigan (Grade B)
- Genesee, Michigan (Grade B)
- Huron, Michigan (Grade B)
- Ingham, Michigan (Grade B)
- Kalamazoo, Michigan (Grade C)
- Kent, Michigan (Grade C)
- Keweenaw, Michigan (Grade B)
- Lenawee, Michigan (Grade C)
- Macomb, Michigan (Grade C)
- Manistee, Michigan (Grade B)
- Mason, Michigan (Grade B)
- Missaukee, Michigan (Grade C)
- Monroe, Michigan (Grade A)
- Muskegon, Michigan (Grade B)
- Oakland, Michigan (Grade B)
- Ottawa, Michigan (Grade C)
- Schoolcraft, Michigan (Grade B)
- St. Clair, Michigan (Grade C)
- Tuscola, Michigan (Grade B)
- Washtenaw, Michigan (Grade C)
- Wayne, Michigan (Grade C)
- Wexford, Michigan (Grade B)
Minnesota
- Anoka, Minnesota (Grade C)
- Becker, Minnesota (Grade C)
- Beltrami, Minnesota (Grade B)
- Carlton, Minnesota (Grade B)
- Cass, Minnesota (Grade C)
- Cook, Minnesota (Grade A)
- Crow Wing, Minnesota (Grade C)
- Dakota, Minnesota (Grade C)
- Goodhue, Minnesota (Grade C)
- Hennepin, Minnesota (Grade C)
- Lake, Minnesota (Grade C)
- Lyon, Minnesota (Grade C)
- Mille Lacs, Minnesota (Grade C)
- Olmsted, Minnesota (Grade C)
- Ramsey, Minnesota (Grade B)
- Saint Louis, Minnesota (Grade B)
- Scott, Minnesota (Grade C)
- Stearns, Minnesota (Grade C)
- Washington, Minnesota (Grade B)
- Winona, Minnesota (Grade B)
- Wright, Minnesota (Grade C)
Mississippi
- Bolivar, Mississippi (Grade C)
- DeSoto, Mississippi (Grade C)
- Forrest, Mississippi (Grade C)
- Hancock, Mississippi (Grade C)
- Harrison, Mississippi (Grade C)
- Hinds, Mississippi (Grade C)
- Jackson, Mississippi (Grade D)
- Lauderdale, Mississippi (Grade B)
- Lee, Mississippi (Grade C)
- Yalobusha, Mississippi (Grade B)
Missouri
- Andrew, Missouri (Grade C)
- Boone, Missouri (Grade B)
- Buchanan, Missouri (Grade B)
- Callaway, Missouri (Grade B)
- Cass, Missouri (Grade B)
- Cedar, Missouri (Grade C)
- Clay, Missouri (Grade B)
- Clinton, Missouri (Grade B)
- Greene, Missouri (Grade C)
- Jackson, Missouri (Grade C)
- Jasper, Missouri (Grade C)
- Jefferson, Missouri (Grade B)
- Lincoln, Missouri (Grade C)
- Monroe, Missouri (Grade B)
- Perry, Missouri (Grade B)
- Saint Charles, Missouri (Grade C)
- Saint Louis, Missouri (Grade B)
- Sainte Genevieve, Missouri (Grade B)
- St. Louis City, Missouri (Grade C)
- Stoddard, Missouri (Grade B)
- Taney, Missouri (Grade A)
Montana
- Cascade, Montana (Grade B)
- Fergus, Montana (Grade C)
- Flathead, Montana (Grade C)
- Gallatin, Montana (Grade B)
- Lake, Montana (Grade B)
- Lewis and Clark, Montana (Grade C)
- Lincoln, Montana (Grade C)
- Missoula, Montana (Grade C)
- Phillips, Montana (Grade C)
- Powder River, Montana (Grade C)
- Powell, Montana (Grade B)
- Ravalli, Montana (Grade B)
- Richland, Montana (Grade B)
- Roosevelt, Montana (Grade B)
- Rosebud, Montana (Grade A)
- Sanders, Montana (Grade D)
- Sheridan, Montana (Grade B)
- Silver Bow, Montana (Grade B)
- Yellowstone, Montana (Grade B)
Nebraska
- Cass, Nebraska (Grade A)
- Douglas, Nebraska (Grade B)
- Hall, Nebraska (Grade B)
- Knox, Nebraska (Grade C)
- Lancaster, Nebraska (Grade B)
- Sarpy, Nebraska (Grade B)
- Scotts Bluff, Nebraska (Grade B)
- Thomas, Nebraska (Grade B)
- Washington, Nebraska (Grade B)
Nevada
- Carson City, Nevada (Grade C)
- Churchill, Nevada (Grade B)
- Clark, Nevada (Grade D)
- Douglas, Nevada (Grade A)
- Elko, Nevada (Grade C)
- Lyon, Nevada (Grade B)
- Nye, Nevada (Grade B)
- Washoe, Nevada (Grade C)
- White Pine, Nevada (Grade C)
New Hampshire
- Belknap, New Hampshire (Grade B)
- Cheshire, New Hampshire (Grade B)
- Coos, New Hampshire (Grade B)
- Grafton, New Hampshire (Grade B)
- Hillsborough, New Hampshire (Grade B)
- Merrimack, New Hampshire (Grade C)
- Rockingham, New Hampshire (Grade B)
New Jersey
- Atlantic, New Jersey (Grade B)
- Bergen, New Jersey (Grade C)
- Camden, New Jersey (Grade C)
- Cumberland, New Jersey (Grade C)
- Essex, New Jersey (Grade C)
- Gloucester, New Jersey (Grade B)
- Hudson, New Jersey (Grade B)
- Hunterdon, New Jersey (Grade C)
- Mercer, New Jersey (Grade C)
- Middlesex, New Jersey (Grade C)
- Monmouth, New Jersey (Grade B)
- Morris, New Jersey (Grade B)
- Ocean, New Jersey (Grade C)
- Passaic, New Jersey (Grade B)
- Union, New Jersey (Grade C)
- Warren, New Jersey (Grade C)
New Mexico
- Bernalillo, New Mexico (Grade D)
- Catron, New Mexico (Grade B)
- Chaves, New Mexico (Grade B)
- Dona Ana, New Mexico (Grade D)
- Eddy, New Mexico (Grade D)
- Lea, New Mexico (Grade C)
- Lincoln, New Mexico (Grade B)
- Los Alamos, New Mexico (Grade B)
- Luna, New Mexico (Grade A)
- Rio Arriba, New Mexico (Grade B)
- San Juan, New Mexico (Grade C)
- Sandoval, New Mexico (Grade C)
- Santa Fe, New Mexico (Grade C)
- Socorro, New Mexico (Grade B)
- Taos, New Mexico (Grade B)
- Valencia, New Mexico (Grade B)
New York
- Albany, New York (Grade C)
- Bronx, New York (Grade C)
- Chautauqua, New York (Grade B)
- Dutchess, New York (Grade B)
- Erie, New York (Grade B)
- Essex, New York (Grade C)
- Franklin, New York (Grade C)
- Hamilton, New York (Grade B)
- Herkimer, New York (Grade B)
- Jefferson, New York (Grade B)
- Kings, New York (Grade C)
- Monroe, New York (Grade C)
- Nassau, New York (Grade B)
- New York, New York (Grade B)
- Niagara, New York (Grade B)
- Oneida, New York (Grade B)
- Onondaga, New York (Grade C)
- Orange, New York (Grade B)
- Oswego, New York (Grade B)
- Putnam, New York (Grade B)
- Queens, New York (Grade C)
- Richmond, New York (Grade B)
- Rockland, New York (Grade B)
- Saratoga, New York (Grade B)
- Steuben, New York (Grade C)
- Suffolk, New York (Grade C)
- Tompkins, New York (Grade B)
- Wayne, New York (Grade B)
- Westchester, New York (Grade B)
North Carolina
- Alexander, North Carolina (Grade B)
- Avery, North Carolina (Grade B)
- Buncombe, North Carolina (Grade B)
- Caldwell, North Carolina (Grade B)
- Carteret, North Carolina (Grade B)
- Caswell, North Carolina (Grade B)
- Catawba, North Carolina (Grade B)
- Cumberland, North Carolina (Grade B)
- Davidson, North Carolina (Grade B)
- Durham, North Carolina (Grade C)
- Edgecombe, North Carolina (Grade B)
- Forsyth, North Carolina (Grade C)
- Graham, North Carolina (Grade C)
- Granville, North Carolina (Grade B)
- Guilford, North Carolina (Grade C)
- Haywood, North Carolina (Grade B)
- Hyde, North Carolina (Grade B)
- Jackson, North Carolina (Grade A)
- Johnston, North Carolina (Grade C)
- Lee, North Carolina (Grade C)
- Lenoir, North Carolina (Grade B)
- Lincoln, North Carolina (Grade B)
- Macon, North Carolina (Grade B)
- Martin, North Carolina (Grade B)
- Mecklenburg, North Carolina (Grade C)
- Mitchell, North Carolina (Grade B)
- Montgomery, North Carolina (Grade C)
- New Hanover, North Carolina (Grade C)
- Northampton, North Carolina (Grade B)
- Person, North Carolina (Grade B)
- Pitt, North Carolina (Grade B)
- Rockingham, North Carolina (Grade B)
- Rowan, North Carolina (Grade C)
- Swain, North Carolina (Grade B)
- Union, North Carolina (Grade B)
- Wake, North Carolina (Grade B)
- Yancey, North Carolina (Grade C)
North Dakota
- Billings, North Dakota (Grade C)
- Burke, North Dakota (Grade C)
- Burleigh, North Dakota (Grade C)
- Cass, North Dakota (Grade C)
- Dunn, North Dakota (Grade C)
- McKenzie, North Dakota (Grade C)
- Mercer, North Dakota (Grade C)
- Oliver, North Dakota (Grade C)
- Ward, North Dakota (Grade C)
- Williams, North Dakota (Grade B)
Ohio
- Adams, Ohio (Grade B)
- Allen, Ohio (Grade C)
- Ashtabula, Ohio (Grade B)
- Athens, Ohio (Grade B)
- Belmont, Ohio (Grade B)
- Butler, Ohio (Grade D)
- Clark, Ohio (Grade C)
- Clermont, Ohio (Grade B)
- Clinton, Ohio (Grade B)
- Columbiana, Ohio (Grade A)
- Cuyahoga, Ohio (Grade C)
- Delaware, Ohio (Grade B)
- Fayette, Ohio (Grade B)
- Franklin, Ohio (Grade C)
- Geauga, Ohio (Grade B)
- Greene, Ohio (Grade B)
- Hamilton, Ohio (Grade C)
- Harrison, Ohio (Grade B)
- Jefferson, Ohio (Grade B)
- Knox, Ohio (Grade B)
- Lake, Ohio (Grade B)
- Lawrence, Ohio (Grade B)
- Licking, Ohio (Grade B)
- Lorain, Ohio (Grade B)
- Lucas, Ohio (Grade B)
- Madison, Ohio (Grade B)
- Mahoning, Ohio (Grade C)
- Medina, Ohio (Grade B)
- Miami, Ohio (Grade B)
- Montgomery, Ohio (Grade C)
- Noble, Ohio (Grade B)
- Portage, Ohio (Grade C)
- Preble, Ohio (Grade C)
- Scioto, Ohio (Grade C)
- Stark, Ohio (Grade C)
- Summit, Ohio (Grade C)
- Trumbull, Ohio (Grade C)
- Warren, Ohio (Grade B)
- Washington, Ohio (Grade B)
- Wood, Ohio (Grade B)
Oklahoma
- Adair, Oklahoma (Grade C)
- Canadian, Oklahoma (Grade C)
- Carter, Oklahoma (Grade C)
- Cleveland, Oklahoma (Grade C)
- Comanche, Oklahoma (Grade C)
- Creek, Oklahoma (Grade C)
- Custer, Oklahoma (Grade A)
- Dewey, Oklahoma (Grade C)
- Grant, Oklahoma (Grade C)
- Johnston, Oklahoma (Grade C)
- Kay, Oklahoma (Grade B)
- Love, Oklahoma (Grade C)
- Mayes, Oklahoma (Grade B)
- McClain, Oklahoma (Grade C)
- Muskogee, Oklahoma (Grade A)
- Oklahoma, Oklahoma (Grade C)
- Osage, Oklahoma (Grade C)
- Ottawa, Oklahoma (Grade C)
- Pittsburg, Oklahoma (Grade C)
- Sequoyah, Oklahoma (Grade C)
- Tulsa, Oklahoma (Grade C)
- Washington, Oklahoma (Grade C)
Oregon
- Baker, Oregon (Grade B)
- Benton, Oregon (Grade B)
- Clackamas, Oregon (Grade B)
- Columbia, Oregon (Grade B)
- Crook, Oregon (Grade B)
- Deschutes, Oregon (Grade B)
- Douglas, Oregon (Grade C)
- Grant, Oregon (Grade C)
- Harney, Oregon (Grade C)
- Jackson, Oregon (Grade C)
- Jefferson, Oregon (Grade A)
- Josephine, Oregon (Grade C)
- Klamath, Oregon (Grade C)
- Lake, Oregon (Grade B)
- Lane, Oregon (Grade C)
- Linn, Oregon (Grade C)
- Marion, Oregon (Grade C)
- Multnomah, Oregon (Grade B)
- Umatilla, Oregon (Grade C)
- Union, Oregon (Grade B)
- Wallowa, Oregon (Grade B)
- Wasco, Oregon (Grade B)
- Washington, Oregon (Grade B)
Pennsylvania
- Adams, Pennsylvania (Grade C)
- Allegheny, Pennsylvania (Grade C)
- Armstrong, Pennsylvania (Grade B)
- Beaver, Pennsylvania (Grade C)
- Berks, Pennsylvania (Grade B)
- Blair, Pennsylvania (Grade B)
- Bradford, Pennsylvania (Grade C)
- Bucks, Pennsylvania (Grade B)
- Cambria, Pennsylvania (Grade B)
- Centre, Pennsylvania (Grade B)
- Chester, Pennsylvania (Grade B)
- Clearfield, Pennsylvania (Grade B)
- Cumberland, Pennsylvania (Grade B)
- Dauphin, Pennsylvania (Grade C)
- Delaware, Pennsylvania (Grade C)
- Elk, Pennsylvania (Grade B)
- Erie, Pennsylvania (Grade B)
- Fayette, Pennsylvania (Grade C)
- Franklin, Pennsylvania (Grade B)
- Greene, Pennsylvania (Grade C)
- Indiana, Pennsylvania (Grade C)
- Lackawanna, Pennsylvania (Grade B)
- Lancaster, Pennsylvania (Grade C)
- Lawrence, Pennsylvania (Grade B)
- Lebanon, Pennsylvania (Grade B)
- Lehigh, Pennsylvania (Grade C)
- Luzerne, Pennsylvania (Grade B)
- Lycoming, Pennsylvania (Grade C)
- Mercer, Pennsylvania (Grade B)
- Monroe, Pennsylvania (Grade B)
- Montgomery, Pennsylvania (Grade C)
- Northampton, Pennsylvania (Grade B)
- Philadelphia, Pennsylvania (Grade C)
- Somerset, Pennsylvania (Grade B)
- Susquehanna, Pennsylvania (Grade B)
- Tioga, Pennsylvania (Grade B)
- Washington, Pennsylvania (Grade B)
- Westmoreland, Pennsylvania (Grade B)
- Wyoming, Pennsylvania (Grade A)
- York, Pennsylvania (Grade B)
Puerto Rico
- Adjuntas, Puerto Rico (Grade A)
- Bayamon, Puerto Rico (Grade A)
- Caguas, Puerto Rico (Grade A)
- Catano, Puerto Rico (Grade D)
- Fajardo, Puerto Rico (Grade B)
- Guayama, Puerto Rico (Grade B)
- Guaynabo, Puerto Rico (Grade C)
- Juncos, Puerto Rico (Grade A)
- Mayagnez, Puerto Rico (Grade C)
- Ponce, Puerto Rico (Grade B)
- San Juan, Puerto Rico (Grade A)
Rhode Island
- Kent, Rhode Island (Grade B)
- Providence, Rhode Island (Grade B)
- Washington, Rhode Island (Grade B)
South Carolina
- Aiken, South Carolina (Grade B)
- Anderson, South Carolina (Grade B)
- Berkeley, South Carolina (Grade B)
- Charleston, South Carolina (Grade C)
- Chesterfield, South Carolina (Grade B)
- Colleton, South Carolina (Grade A)
- Darlington, South Carolina (Grade B)
- Edgefield, South Carolina (Grade C)
- Florence, South Carolina (Grade B)
- Georgetown, South Carolina (Grade A)
- Greenville, South Carolina (Grade C)
- Horry, South Carolina (Grade C)
- Lexington, South Carolina (Grade B)
- Oconee, South Carolina (Grade B)
- Pickens, South Carolina (Grade C)
- Richland, South Carolina (Grade B)
- Spartanburg, South Carolina (Grade C)
- York, South Carolina (Grade C)
South Dakota
- Brookings, South Dakota (Grade C)
- Brown, South Dakota (Grade B)
- Codington, South Dakota (Grade D)
- Custer, South Dakota (Grade C)
- Hughes, South Dakota (Grade A)
- Jackson, South Dakota (Grade B)
- Meade, South Dakota (Grade C)
- Minnehaha, South Dakota (Grade B)
- Pennington, South Dakota (Grade C)
- Union, South Dakota (Grade B)
Tennessee
- Anderson, Tennessee (Grade B)
- Blount, Tennessee (Grade C)
- Claiborne, Tennessee (Grade B)
- Davidson, Tennessee (Grade C)
- DeKalb, Tennessee (Grade B)
- Dyer, Tennessee (Grade B)
- Hamilton, Tennessee (Grade C)
- Jefferson, Tennessee (Grade B)
- Knox, Tennessee (Grade C)
- Lawrence, Tennessee (Grade B)
- Loudon, Tennessee (Grade B)
- Madison, Tennessee (Grade B)
- Maury, Tennessee (Grade B)
- McMinn, Tennessee (Grade B)
- Montgomery, Tennessee (Grade B)
- Putnam, Tennessee (Grade B)
- Roane, Tennessee (Grade A)
- Sevier, Tennessee (Grade B)
- Shelby, Tennessee (Grade C)
- Sullivan, Tennessee (Grade C)
- Sumner, Tennessee (Grade C)
- Williamson, Tennessee (Grade C)
- Wilson, Tennessee (Grade B)
Texas
- Bell, Texas (Grade C)
- Bexar, Texas (Grade C)
- Bowie, Texas (Grade C)
- Brazoria, Texas (Grade C)
- Brewster, Texas (Grade C)
- Cameron, Texas (Grade C)
- Collin, Texas (Grade C)
- Culberson, Texas (Grade C)
- Dallas, Texas (Grade C)
- Denton, Texas (Grade C)
- Ector, Texas (Grade B)
- El Paso, Texas (Grade D)
- Ellis, Texas (Grade B)
- Fayette, Texas (Grade B)
- Galveston, Texas (Grade C)
- Gregg, Texas (Grade B)
- Harris, Texas (Grade D)
- Harrison, Texas (Grade C)
- Hidalgo, Texas (Grade C)
- Hood, Texas (Grade C)
- Hunt, Texas (Grade B)
- Jefferson, Texas (Grade C)
- Johnson, Texas (Grade C)
- Kaufman, Texas (Grade C)
- Kleberg, Texas (Grade C)
- Lubbock, Texas (Grade B)
- Maverick, Texas (Grade B)
- McLennan, Texas (Grade C)
- Montgomery, Texas (Grade C)
- Navarro, Texas (Grade B)
- Nueces, Texas (Grade C)
- Orange, Texas (Grade C)
- Parker, Texas (Grade C)
- Polk, Texas (Grade B)
- Potter, Texas (Grade B)
- Randall, Texas (Grade C)
- Rockwall, Texas (Grade B)
- Smith, Texas (Grade C)
- Tarrant, Texas (Grade D)
- Travis, Texas (Grade C)
- Victoria, Texas (Grade B)
- Webb, Texas (Grade B)
Utah
- Box Elder, Utah (Grade B)
- Cache, Utah (Grade C)
- Carbon, Utah (Grade B)
- Davis, Utah (Grade C)
- Duchesne, Utah (Grade C)
- Garfield, Utah (Grade B)
- Iron, Utah (Grade B)
- Salt Lake, Utah (Grade D)
- San Juan, Utah (Grade C)
- Tooele, Utah (Grade C)
- Uintah, Utah (Grade D)
- Utah, Utah (Grade C)
- Washington, Utah (Grade C)
- Wayne, Utah (Grade B)
- Weber, Utah (Grade C)
Vermont
- Bennington, Vermont (Grade B)
- Chittenden, Vermont (Grade C)
- Rutland, Vermont (Grade B)
- Windham, Vermont (Grade A)
Virgin Islands
- St Croix, Virgin Islands (Grade A)
- St John, Virgin Islands (Grade A)
Virginia
- Albemarle, Virginia (Grade C)
- Alexandria City, Virginia (Grade A)
- Arlington, Virginia (Grade B)
- Bristol City, Virginia (Grade B)
- Caroline, Virginia (Grade B)
- Carroll, Virginia (Grade A)
- Charles, Virginia (Grade B)
- Chesterfield, Virginia (Grade B)
- Fairfax, Virginia (Grade C)
- Fauquier, Virginia (Grade B)
- Frederick, Virginia (Grade C)
- Giles, Virginia (Grade B)
- Hampton City, Virginia (Grade C)
- Hanover, Virginia (Grade B)
- Henrico, Virginia (Grade C)
- Hopewell City, Virginia (Grade A)
- Loudoun, Virginia (Grade B)
- Lynchburg City, Virginia (Grade B)
- Madison, Virginia (Grade B)
- Norfolk City, Virginia (Grade A)
- Prince Edward, Virginia (Grade B)
- Prince William, Virginia (Grade C)
- Richmond City, Virginia (Grade C)
- Roanoke, Virginia (Grade B)
- Rockbridge, Virginia (Grade B)
- Rockingham, Virginia (Grade B)
- Salem City, Virginia (Grade B)
- Stafford, Virginia (Grade B)
- Suffolk City, Virginia (Grade B)
- Virginia Beach City, Virginia (Grade B)
- Winchester City, Virginia (Grade A)
- Wythe, Virginia (Grade B)
Washington
- Adams, Washington (Grade B)
- Asotin, Washington (Grade D)
- Benton, Washington (Grade C)
- Chelan, Washington (Grade C)
- Clallam, Washington (Grade B)
- Clark, Washington (Grade B)
- Columbia, Washington (Grade C)
- Cowlitz, Washington (Grade B)
- Franklin, Washington (Grade B)
- Garfield, Washington (Grade A)
- Grant, Washington (Grade B)
- Grays Harbor, Washington (Grade B)
- Jefferson, Washington (Grade B)
- King, Washington (Grade C)
- Kitsap, Washington (Grade B)
- Kittitas, Washington (Grade B)
- Klickitat, Washington (Grade B)
- Lewis, Washington (Grade B)
- Mason, Washington (Grade B)
- Okanogan, Washington (Grade C)
- Pierce, Washington (Grade C)
- Skagit, Washington (Grade B)
- Snohomish, Washington (Grade C)
- Spokane, Washington (Grade B)
- Stevens, Washington (Grade C)
- Thurston, Washington (Grade B)
- Walla Walla, Washington (Grade B)
- Whatcom, Washington (Grade B)
- Whitman, Washington (Grade B)
- Yakima, Washington (Grade C)
West Virginia
- Berkeley, West Virginia (Grade B)
- Brooke, West Virginia (Grade B)
- Cabell, West Virginia (Grade B)
- Gilmer, West Virginia (Grade B)
- Greenbrier, West Virginia (Grade B)
- Hancock, West Virginia (Grade B)
- Harrison, West Virginia (Grade B)
- Kanawha, West Virginia (Grade C)
- Marion, West Virginia (Grade B)
- Marshall, West Virginia (Grade C)
- Monongalia, West Virginia (Grade B)
- Ohio, West Virginia (Grade B)
- Tucker, West Virginia (Grade B)
- Wood, West Virginia (Grade B)
Wisconsin
- Ashland, Wisconsin (Grade C)
- Brown, Wisconsin (Grade C)
- Columbia, Wisconsin (Grade C)
- Dane, Wisconsin (Grade C)
- Dodge, Wisconsin (Grade C)
- Door, Wisconsin (Grade C)
- Eau Claire, Wisconsin (Grade C)
- Fond du Lac, Wisconsin (Grade B)
- Forest, Wisconsin (Grade C)
- Grant, Wisconsin (Grade C)
- Jefferson, Wisconsin (Grade C)
- Kenosha, Wisconsin (Grade C)
- Kewaunee, Wisconsin (Grade C)
- La Crosse, Wisconsin (Grade C)
- Manitowoc, Wisconsin (Grade B)
- Marathon, Wisconsin (Grade B)
- Milwaukee, Wisconsin (Grade C)
- Outagamie, Wisconsin (Grade C)
- Ozaukee, Wisconsin (Grade C)
- Racine, Wisconsin (Grade C)
- Rock, Wisconsin (Grade C)
- Sauk, Wisconsin (Grade C)
- Sheboygan, Wisconsin (Grade C)
- Taylor, Wisconsin (Grade C)
- Vilas, Wisconsin (Grade B)
- Walworth, Wisconsin (Grade C)
- Waukesha, Wisconsin (Grade C)
Wyoming
- Albany, Wyoming (Grade C)
- Big Horn, Wyoming (Grade B)
- Campbell, Wyoming (Grade C)
- Carbon, Wyoming (Grade A)
- Converse, Wyoming (Grade B)
- Fremont, Wyoming (Grade C)
- Johnson, Wyoming (Grade C)
- Laramie, Wyoming (Grade C)
- Lincoln, Wyoming (Grade C)
- Natrona, Wyoming (Grade C)
- Park, Wyoming (Grade B)
- Platte, Wyoming (Grade B)
- Sheridan, Wyoming (Grade C)
- Sublette, Wyoming (Grade C)
- Sweetwater, Wyoming (Grade C)
- Teton, Wyoming (Grade C)
- Uinta, Wyoming (Grade A)
- Weston, Wyoming (Grade B)