US counties by share of days unhealthy for sensitive groups or worse (US EPA AQI), 2018

San Bernardino County 42.2%, the highest of 1001 counties, 2018

Baldwin County: 0 %Clay County: 0 %Colbert County: 0 %DeKalb County: 0 %Elmore County: 0 %Etowah County: 0.3 %Houston County: 0 %Jefferson County: 1.1 %Lawrence County: 0 %Madison County: 0.3 %Mobile County: 0.3 %Montgomery County: 0 %Morgan County: 0 %Russell County: 0 %Shelby County: 0.4 %Sumter County: 0 %Tuscaloosa County: 0.3 %Aleutians East Borough: 0 %Anchorage Municipality: 0 %Bethel Census Area: 0 %Denali Borough: 0 %Fairbanks North Star Borough: 10.7 %Juneau City and Borough: 0 %Kenai Peninsula Borough: 0 %Matanuska-Susitna Borough: 1.1 %Apache County: 0 %Cochise County: 0 %Coconino County: 0.8 %Gila County: 6.3 %La Paz County: 0.8 %Maricopa County: 17.5 %Mohave County: 0.3 %Navajo County: 0.6 %Pima County: 3 %Pinal County: 14 %Santa Cruz County: 0.5 %Yavapai County: 0.3 %Yuma County: 4.4 %Arkansas County: 0 %Ashley County: 0.8 %Clark County: 0 %Craighead County: 0 %Crittenden County: 0.8 %Garland County: 0 %Jackson County: 0 %Newton County: 0 %Polk County: 0 %Pulaski County: 0.5 %Union County: 0.8 %Washington County: 0 %Alameda County: 4.7 %Amador County: 1.6 %Butte County: 11 %Calaveras County: 5.5 %Colusa County: 7.7 %Contra Costa County: 4.9 %Del Norte County: 0 %El Dorado County: 10.1 %Fresno County: 26.8 %Glenn County: 4.4 %Humboldt County: 1.6 %Imperial County: 13.7 %Inyo County: 10.1 %Kern County: 35.6 %Kings County: 15.9 %Lake County: 0.8 %Los Angeles County: 29.6 %Madera County: 9.6 %Marin County: 3.6 %Mariposa County: 11 %Mendocino County: 5.8 %Merced County: 11.2 %Mono County: 7.9 %Monterey County: 1.9 %Napa County: 3.3 %Nevada County: 7.7 %Orange County: 4.9 %Placer County: 6.8 %Plumas County: 2.9 %Riverside County: 38.4 %Sacramento County: 9.6 %San Benito County: 3 %San Bernardino County: 42.2 %San Diego County: 9.6 %San Francisco County: 3.8 %San Joaquin County: 9 %San Luis Obispo County: 2.5 %San Mateo County: 3.6 %Santa Barbara County: 0.5 %Santa Clara County: 4.7 %Santa Cruz County: 2.7 %Shasta County: 5.8 %Siskiyou County: 11 %Solano County: 4.1 %Sonoma County: 3.6 %Stanislaus County: 12.9 %Sutter County: 9.6 %Tehama County: 7.9 %Trinity County: 6.5 %Tulare County: 33.2 %Tuolumne County: 6 %Ventura County: 4.7 %Yolo County: 3.8 %Adams County: 0.8 %Alamosa County: 0.3 %Arapahoe County: 4.1 %Archuleta County: 0 %Boulder County: 8 %Chaffee County: 3.7 %Clear Creek County: 9.6 %Delta County: 0 %Denver County: 2.7 %Douglas County: 7.4 %El Paso County: 2.2 %Fremont County: 0 %Garfield County: 4.4 %Grand County: 1.2 %Gunnison County: 1.4 %Jackson County: 0 %Jefferson County: 10.1 %La Plata County: 5.5 %Larimer County: 7.7 %Mesa County: 1.4 %Moffat County: 0.3 %Montezuma County: 1.1 %Montrose County: 0.3 %Park County: 5.6 %Pitkin County: 0 %Prowers County: 0.3 %Pueblo County: 0.8 %Rio Blanco County: 0.5 %Routt County: 0 %San Juan County: 0 %San Miguel County: 0.8 %Teller County: 7.5 %Weld County: 2.7 %Kent County: 0.5 %New Castle County: 1.6 %Sussex County: 1.1 %District of Columbia: 1.6 %Alachua County: 0 %Baker County: 0 %Bay County: 0.3 %Brevard County: 0.3 %Broward County: 0 %Citrus County: 0 %Collier County: 0 %Columbia County: 0.3 %Duval County: 1.4 %Escambia County: 0 %Flagler County: 0 %Hamilton County: 0 %Highlands County: 0.3 %Hillsborough County: 1.1 %Holmes County: 0 %Indian River County: 0.3 %Lake County: 0.3 %Lee County: 0.3 %Leon County: 0 %Liberty County: 0 %Manatee County: 0.5 %Marion County: 0 %Martin County: 0.3 %Miami-Dade County: 1.1 %Nassau County: 0 %Okaloosa County: 0 %Orange County: 0.5 %Osceola County: 0.5 %Palm Beach County: 0 %Pasco County: 0.5 %Pinellas County: 0 %Polk County: 0.5 %Putnam County: 0 %St. Lucie County: 0 %Santa Rosa County: 0 %Sarasota County: 0 %Seminole County: 0.5 %Volusia County: 0 %Wakulla County: 0 %Bibb County: 0.3 %Charlton County: 0 %Chatham County: 0 %Chattooga County: 0 %Clarke County: 0.6 %Clayton County: 0 %Cobb County: 0 %Coffee County: 0 %Columbia County: 0 %Dawson County: 0.8 %DeKalb County: 0 %Dougherty County: 0.3 %Douglas County: 0 %Floyd County: 0 %Fulton County: 1.1 %Glynn County: 0 %Gwinnett County: 0 %Hall County: 0 %Henry County: 0.8 %Houston County: 0.6 %Lowndes County: 0 %Murray County: 0 %Muscogee County: 0 %Pike County: 0.3 %Richmond County: 1.1 %Rockdale County: 0.8 %Sumter County: 0 %Walker County: 0 %Washington County: 0 %Hawaii County: 3.8 %Honolulu County: 0 %Kauai County: 0 %Maui County: 0 %Ada County: 1.9 %Bannock County: 1.1 %Benewah County: 3.6 %Blaine County: 0.8 %Boise County: 1.6 %Bonner County: 4.4 %Bonneville County: 0.9 %Butte County: 0.8 %Canyon County: 1.4 %Custer County: 2.2 %Franklin County: 0.9 %Idaho County: 0.5 %Jerome County: 1.6 %Kootenai County: 3 %Latah County: 1.6 %Lemhi County: 0.8 %Nez Perce County: 1.4 %Shoshone County: 3.6 %Twin Falls County: 1.4 %Valley County: 0.6 %Adams County: 0 %Champaign County: 1.1 %Clark County: 0.3 %Cook County: 5.2 %DuPage County: 1.1 %Effingham County: 0.4 %Hamilton County: 0.8 %Jersey County: 0.8 %Jo Daviess County: 0.6 %Kane County: 1.4 %Lake County: 2.3 %McHenry County: 2.2 %McLean County: 0.3 %Macon County: 0.8 %Macoupin County: 0.9 %Madison County: 2.7 %Peoria County: 0.8 %Randolph County: 0.3 %Rock Island County: 0.3 %St. Clair County: 1.4 %Sangamon County: 0.3 %Will County: 1.1 %Winnebago County: 0.8 %Allen County: 1.6 %Bartholomew County: 1.1 %Boone County: 1.4 %Brown County: 0 %Carroll County: 0.8 %Clark County: 1.1 %Delaware County: 1.1 %Dubois County: 0 %Elkhart County: 0.8 %Floyd County: 1.4 %Greene County: 0.8 %Hamilton County: 1.6 %Hendricks County: 0.5 %Henry County: 0.9 %Howard County: 1.4 %Huntington County: 0 %Jackson County: 0 %Knox County: 1.1 %Lake County: 1.6 %LaPorte County: 1.9 %Madison County: 1.9 %Marion County: 3 %Monroe County: 0 %Morgan County: 0 %Perry County: 0 %Porter County: 1.4 %Posey County: 0 %St. Joseph County: 1.9 %Shelby County: 1.4 %Spencer County: 0 %Sullivan County: 0 %Tippecanoe County: 0 %Vanderburgh County: 0.8 %Vigo County: 0.8 %Wabash County: 1.4 %Warrick County: 0.8 %Whitley County: 0 %Black Hawk County: 0 %Bremer County: 0.8 %Cerro Gordo County: 0 %Clinton County: 0 %Harrison County: 0.8 %Johnson County: 0 %Lee County: 0 %Linn County: 1.1 %Montgomery County: 0 %Muscatine County: 0 %Palo Alto County: 0.5 %Polk County: 0.5 %Pottawattamie County: 0.8 %Scott County: 1.1 %Van Buren County: 0 %Woodbury County: 0 %Chase County: 0 %Ford County: 0.3 %Johnson County: 0 %Leavenworth County: 0 %Neosho County: 0 %Sedgwick County: 0 %Shawnee County: 0 %Sherman County: 0 %Sumner County: 0 %Trego County: 0.3 %Wyandotte County: 0.8 %Bell County: 0 %Boone County: 0.8 %Boyd County: 0.3 %Bullitt County: 0.9 %Campbell County: 0.3 %Carter County: 0 %Christian County: 0 %Daviess County: 0.3 %Edmonson County: 0 %Fayette County: 0 %Greenup County: 0.4 %Hancock County: 0 %Hardin County: 0 %Henderson County: 0.6 %Jefferson County: 2.2 %Jessamine County: 0 %Livingston County: 0 %McCracken County: 0 %Morgan County: 0 %Oldham County: 0.4 %Perry County: 0 %Pike County: 0 %Pulaski County: 0 %Simpson County: 0 %Trigg County: 0 %Warren County: 0 %Washington County: 0 %Ascension Parish: 0.8 %Bossier Parish: 0 %Caddo Parish: 0.6 %Calcasieu Parish: 1.6 %East Baton Rouge Parish: 3 %Iberville Parish: 2.2 %Jefferson Parish: 0.3 %Lafayette Parish: 0 %Lafourche Parish: 0 %Livingston Parish: 0 %Orleans Parish: 0 %Ouachita Parish: 0 %Pointe Coupee Parish: 0 %Rapides Parish: 0 %St. Bernard Parish: 0.8 %St. James Parish: 0 %St. John the Baptist Parish: 0.3 %St. Martin Parish: 0 %St. Tammany Parish: 0.3 %Tangipahoa Parish: 0 %Terrebonne Parish: 0 %West Baton Rouge Parish: 0.8 %Androscoggin County: 0 %Aroostook County: 0.5 %Cumberland County: 0 %Hancock County: 0.3 %Kennebec County: 0 %Knox County: 0.5 %Oxford County: 0 %Penobscot County: 0 %Washington County: 0.3 %York County: 0.9 %Anne Arundel County: 3.4 %Baltimore County: 1.4 %Calvert County: 0.4 %Carroll County: 0 %Cecil County: 2 %Charles County: 0.4 %Dorchester County: 0.5 %Frederick County: 0 %Garrett County: 0 %Harford County: 2.8 %Howard County: 0 %Kent County: 0.8 %Montgomery County: 0.3 %Prince George's County: 2.2 %Washington County: 0 %Baltimore city: 2.2 %Barnstable County: 1.1 %Berkshire County: 0.3 %Bristol County: 2.7 %Dukes County: 0.8 %Essex County: 1.1 %Franklin County: 0 %Hampden County: 0.5 %Hampshire County: 0.6 %Middlesex County: 0 %Norfolk County: 0.3 %Plymouth County: 0.8 %Suffolk County: 0.3 %Worcester County: 1.1 %Allegan County: 2.8 %Bay County: 0 %Benzie County: 0.8 %Berrien County: 3.3 %Cass County: 2.9 %Chippewa County: 0 %Clinton County: 1.6 %Genesee County: 0.8 %Huron County: 1.2 %Ingham County: 0.6 %Kalamazoo County: 1.1 %Kent County: 1.1 %Keweenaw County: 0 %Lenawee County: 1.2 %Macomb County: 3.3 %Manistee County: 0.4 %Mason County: 0.4 %Missaukee County: 0 %Monroe County: 0 %Muskegon County: 2.5 %Oakland County: 3.2 %Ottawa County: 1.4 %St. Clair County: 2.3 %Schoolcraft County: 0.6 %Tuscola County: 0.3 %Washtenaw County: 1.6 %Wayne County: 1.9 %Wexford County: 0.6 %Anoka County: 0.3 %Becker County: 0 %Beltrami County: 0.3 %Carlton County: 0 %Cass County: 0 %Cook County: 0 %Crow Wing County: 0.3 %Dakota County: 0 %Goodhue County: 0.4 %Hennepin County: 0.3 %Lake County: 0 %Lyon County: 0 %Mille Lacs County: 0 %Olmsted County: 0 %Ramsey County: 0.3 %St. Louis County: 0.5 %Scott County: 0.6 %Stearns County: 0.3 %Washington County: 0 %Winona County: 0 %Wright County: 0.8 %Bolivar County: 0.6 %DeSoto County: 0.8 %Forrest County: 0.3 %Grenada County: 0 %Hancock County: 0.3 %Harrison County: 0.8 %Hinds County: 0.3 %Jackson County: 0.6 %Lauderdale County: 0 %Lee County: 0 %Yalobusha County: 0 %Andrew County: 0.4 %Boone County: 0.4 %Buchanan County: 0 %Callaway County: 0 %Cass County: 0 %Cedar County: 0 %Clay County: 3 %Clinton County: 0.8 %Greene County: 0 %Jackson County: 0 %Jasper County: 0 %Jefferson County: 1.7 %Lincoln County: 1.2 %Monroe County: 0.3 %Perry County: 0.4 %St. Charles County: 3.3 %Ste. Genevieve County: 0 %St. Louis County: 1.6 %Stoddard County: 0 %Taney County: 0 %St. Louis city: 2.7 %Cascade County: 1.7 %Fergus County: 1.6 %Flathead County: 4.4 %Gallatin County: 1.6 %Lake County: 2.5 %Lewis and Clark County: 2.7 %Lincoln County: 5.5 %Missoula County: 1.1 %Phillips County: 1.1 %Powder River County: 1.1 %Powell County: 0 %Ravalli County: 0 %Richland County: 0.3 %Roosevelt County: 1.9 %Rosebud County: 0.5 %Sanders County: 3.8 %Sheridan County: 0.9 %Silver Bow County: 0.3 %Yellowstone County: 0.9 %Cass County: 0 %Douglas County: 1.1 %Hall County: 0 %Knox County: 0 %Lancaster County: 0 %Sarpy County: 0 %Scotts Bluff County: 0 %Thomas County: 0 %Washington County: 0 %Churchill County: 1.5 %Clark County: 13.4 %Douglas County: 2.8 %Elko County: 1.2 %Lyon County: 2.2 %Nye County: 0 %Washoe County: 5.2 %White Pine County: 1.7 %Carson City: 2.2 %Belknap County: 0 %Cheshire County: 0 %Coos County: 1.1 %Grafton County: 0 %Hillsborough County: 0 %Merrimack County: 0 %Rockingham County: 0.8 %Atlantic County: 0.3 %Bergen County: 3.8 %Camden County: 1.4 %Cumberland County: 0 %Essex County: 1.1 %Gloucester County: 2.5 %Hudson County: 2.5 %Hunterdon County: 1.4 %Mercer County: 1.9 %Middlesex County: 1.6 %Monmouth County: 0 %Morris County: 1.4 %Ocean County: 2.3 %Passaic County: 1.1 %Union County: 0 %Warren County: 0.3 %Bernalillo County: 5.2 %Catron County: 0 %Chaves County: 0 %Doña Ana County: 8.8 %Eddy County: 5.5 %Lea County: 1.6 %Lincoln County: 0 %Los Alamos County: 0 %Luna County: 0.8 %Rio Arriba County: 0.8 %Sandoval County: 3.4 %San Juan County: 4.4 %Santa Fe County: 0.8 %Socorro County: 0 %Taos County: 0 %Valencia County: 1.4 %Albany County: 0.5 %Bronx County: 2.5 %Chautauqua County: 1.1 %Dutchess County: 0.6 %Erie County: 0.5 %Essex County: 0.5 %Hamilton County: 0 %Herkimer County: 0 %Jefferson County: 0.6 %Kings County: 0 %Monroe County: 1.1 %Nassau County: 0 %New York County: 3 %Niagara County: 0.3 %Oneida County: 0 %Onondaga County: 0.5 %Orange County: 0.3 %Oswego County: 0.3 %Putnam County: 0.6 %Queens County: 2.2 %Richmond County: 1.7 %Rockland County: 1.6 %Saratoga County: 0.3 %Steuben County: 0 %Suffolk County: 3 %Tompkins County: 0.3 %Wayne County: 1.7 %Westchester County: 3.3 %Alexander County: 0 %Avery County: 0 %Buncombe County: 0 %Caldwell County: 0 %Carteret County: 0 %Caswell County: 0 %Catawba County: 0 %Cumberland County: 0 %Davidson County: 0 %Durham County: 0 %Edgecombe County: 0 %Forsyth County: 0.5 %Graham County: 0 %Granville County: 0 %Guilford County: 0.3 %Haywood County: 0.4 %Hyde County: 0 %Jackson County: 0.4 %Johnston County: 0 %Lee County: 0 %Lenoir County: 0.4 %Lincoln County: 0 %Macon County: 0 %Martin County: 0 %Mecklenburg County: 1.4 %Mitchell County: 0 %Montgomery County: 0 %New Hanover County: 0 %Person County: 0 %Pitt County: 0 %Rockingham County: 0 %Rowan County: 0 %Swain County: 0 %Union County: 1.6 %Wake County: 0 %Yancey County: 0 %Billings County: 0 %Burke County: 0.3 %Burleigh County: 1.1 %Cass County: 0.3 %Dunn County: 0 %McKenzie County: 0 %Mercer County: 0.5 %Oliver County: 0.8 %Ward County: 0.8 %Williams County: 0 %Adams County: 0 %Allen County: 1.4 %Ashtabula County: 1.2 %Athens County: 0 %Belmont County: 0 %Butler County: 1.6 %Clark County: 1.1 %Clermont County: 0.6 %Clinton County: 0.4 %Columbiana County: 0 %Cuyahoga County: 3 %Delaware County: 0 %Fayette County: 0 %Franklin County: 0.5 %Geauga County: 3.7 %Greene County: 0.3 %Hamilton County: 2.2 %Harrison County: 0 %Jefferson County: 0.6 %Knox County: 0.4 %Lake County: 2.5 %Lawrence County: 0.5 %Licking County: 0 %Lorain County: 0.3 %Lucas County: 2.9 %Madison County: 0.4 %Mahoning County: 0 %Medina County: 0 %Miami County: 0.4 %Montgomery County: 1.1 %Noble County: 0 %Portage County: 0 %Preble County: 0.3 %Scioto County: 0 %Stark County: 0.8 %Summit County: 0.3 %Trumbull County: 1.1 %Warren County: 1.4 %Washington County: 1.2 %Wood County: 0.8 %Adair County: 0.5 %Bryan County: 1 %Canadian County: 1.7 %Carter County: 0.6 %Choctaw County: 0 %Cleveland County: 1.6 %Comanche County: 1.1 %Creek County: 0.3 %Custer County: 0.3 %Dewey County: 1.9 %Jefferson County: 1.9 %Kay County: 0.5 %Le Flore County: 0 %Love County: 2.6 %McClain County: 0.9 %Mayes County: 0.4 %Muskogee County: 0.6 %Nowata County: 0 %Oklahoma County: 2.5 %Osage County: 1.9 %Ottawa County: 0.3 %Pittsburg County: 0.3 %Sequoyah County: 0 %Tulsa County: 2.2 %Washington County: 0 %Baker County: 0.6 %Benton County: 0.6 %Clackamas County: 2.8 %Columbia County: 1.1 %Crook County: 1.9 %Deschutes County: 3.9 %Douglas County: 0.6 %Grant County: 0.8 %Harney County: 1.7 %Jackson County: 11.5 %Jefferson County: 3.3 %Josephine County: 10.7 %Klamath County: 11.1 %Lake County: 6.1 %Lane County: 2.2 %Linn County: 1.4 %Marion County: 1.7 %Multnomah County: 2.5 %Umatilla County: 2.4 %Union County: 1.7 %Wallowa County: 0.6 %Wasco County: 1.5 %Washington County: 1.9 %Adams County: 0.5 %Allegheny County: 3.6 %Armstrong County: 0.3 %Beaver County: 1.6 %Berks County: 1.4 %Blair County: 0.3 %Bradford County: 0 %Bucks County: 3.6 %Cambria County: 0 %Centre County: 0.5 %Chester County: 0.3 %Clearfield County: 0.3 %Cumberland County: 0 %Dauphin County: 0.3 %Delaware County: 1.6 %Elk County: 0 %Erie County: 0 %Fayette County: 0.4 %Franklin County: 0 %Greene County: 0 %Indiana County: 0.3 %Lackawanna County: 0 %Lancaster County: 1.4 %Lawrence County: 0 %Lebanon County: 0.5 %Lehigh County: 0.5 %Luzerne County: 0.3 %Lycoming County: 0 %Mercer County: 0.8 %Monroe County: 0.6 %Montgomery County: 2 %Northampton County: 1.4 %Philadelphia County: 2.7 %Somerset County: 0 %Susquehanna County: 0 %Tioga County: 0 %Washington County: 0.5 %Westmoreland County: 0.5 %York County: 0.3 %Kent County: 1.7 %Providence County: 2.2 %Washington County: 1.4 %Aiken County: 0 %Anderson County: 0 %Berkeley County: 0 %Charleston County: 0 %Chesterfield County: 0.3 %Colleton County: 0 %Darlington County: 0 %Edgefield County: 0 %Florence County: 0 %Georgetown County: 0 %Greenville County: 0 %Horry County: 0 %Lexington County: 0 %Oconee County: 0 %Pickens County: 0 %Richland County: 0.3 %Spartanburg County: 0 %York County: 0.8 %Brookings County: 0.3 %Brown County: 1.7 %Codington County: 0.3 %Custer County: 0 %Hughes County: 0.3 %Jackson County: 0.3 %Meade County: 0 %Minnehaha County: 0.8 %Pennington County: 0.5 %Union County: 0.8 %Anderson County: 0 %Blount County: 0.3 %Claiborne County: 0 %Davidson County: 1.4 %DeKalb County: 0 %Dyer County: 0 %Hamilton County: 0.3 %Jefferson County: 0 %Knox County: 0.3 %Lawrence County: 0 %Loudon County: 0.3 %McMinn County: 0 %Madison County: 0 %Maury County: 0 %Montgomery County: 0 %Putnam County: 0 %Roane County: 0 %Sevier County: 1.1 %Shelby County: 2.2 %Sullivan County: 0.3 %Sumner County: 0.6 %Williamson County: 0.4 %Wilson County: 1 %Bell County: 1.4 %Bexar County: 3 %Bowie County: 0.3 %Brazoria County: 1.4 %Brewster County: 0 %Cameron County: 0 %Collin County: 4.4 %Culberson County: 0 %Dallas County: 5.2 %Denton County: 3.8 %Ector County: 0 %Ellis County: 2.2 %El Paso County: 4.7 %Fayette County: 0 %Galveston County: 2.7 %Gregg County: 0 %Harris County: 7.4 %Harrison County: 0.3 %Hidalgo County: 1.1 %Hood County: 1.4 %Hunt County: 1.1 %Jefferson County: 2.2 %Johnson County: 2.3 %Kaufman County: 0.3 %Kleberg County: 1.2 %Lubbock County: 0.3 %McLennan County: 0 %Maverick County: 0 %Montgomery County: 3 %Navarro County: 1.1 %Nueces County: 0 %Orange County: 1.6 %Parker County: 1.7 %Polk County: 0 %Potter County: 0.3 %Randall County: 2.5 %Rockwall County: 1.6 %Smith County: 0.5 %Tarrant County: 5.2 %Travis County: 2.5 %Victoria County: 0.7 %Webb County: 0.6 %Box Elder County: 2.5 %Cache County: 1.9 %Carbon County: 1.4 %Davis County: 3.6 %Duchesne County: 3 %Garfield County: 0.5 %Iron County: 0 %Salt Lake County: 11.2 %San Juan County: 2 %Tooele County: 2.7 %Uintah County: 3 %Utah County: 8.8 %Washington County: 0.3 %Wayne County: 0 %Weber County: 4.7 %Bennington County: 0.3 %Chittenden County: 0 %Rutland County: 0 %Windham County: 0 %Albemarle County: 0 %Arlington County: 0.8 %Caroline County: 0 %Carroll County: 0 %Charles City County: 0.3 %Chesterfield County: 0 %Fairfax County: 0.3 %Fauquier County: 0 %Frederick County: 0 %Giles County: 0 %Hanover County: 0 %Henrico County: 0.3 %Loudoun County: 0 %Madison County: 0 %Prince Edward County: 0 %Prince William County: 0 %Roanoke County: 0 %Rockbridge County: 0 %Rockingham County: 0 %Stafford County: 0.4 %Wythe County: 0 %Alexandria city: 0 %Bristol city: 0 %Hampton city: 0 %Hopewell city: 0 %Lynchburg city: 0 %Norfolk city: 0 %Richmond city: 0 %Salem city: 0 %Suffolk city: 0 %Virginia Beach city: 0 %Winchester city: 0 %Adams County: 2.3 %Asotin County: 2.5 %Benton County: 3.8 %Chelan County: 6.8 %Clallam County: 2.2 %Clark County: 1.6 %Columbia County: 2.3 %Cowlitz County: 1.1 %Franklin County: 1.9 %Garfield County: 1.1 %Grant County: 3 %Grays Harbor County: 1.1 %Jefferson County: 1.7 %King County: 3.8 %Kitsap County: 1.4 %Kittitas County: 3.4 %Klickitat County: 1.9 %Lewis County: 1.6 %Mason County: 1.6 %Okanogan County: 9 %Pierce County: 3 %Skagit County: 2.2 %Snohomish County: 2.5 %Spokane County: 3.3 %Stevens County: 4.7 %Thurston County: 1.7 %Walla Walla County: 2.2 %Whatcom County: 2.5 %Whitman County: 1.9 %Yakima County: 4.4 %Berkeley County: 0 %Brooke County: 0 %Cabell County: 0 %Gilmer County: 0 %Greenbrier County: 0 %Hancock County: 0.3 %Harrison County: 0 %Kanawha County: 0.3 %Marion County: 0 %Marshall County: 0 %Monongalia County: 0 %Ohio County: 0.4 %Tucker County: 0 %Wood County: 0 %Ashland County: 0 %Brown County: 0.3 %Columbia County: 0.4 %Dane County: 0.5 %Dodge County: 0.8 %Door County: 1.8 %Eau Claire County: 0.3 %Fond du Lac County: 0.4 %Forest County: 0 %Grant County: 0 %Jefferson County: 0.8 %Kenosha County: 3.8 %Kewaunee County: 2.1 %La Crosse County: 0 %Manitowoc County: 2.9 %Marathon County: 0 %Milwaukee County: 1.4 %Outagamie County: 0.3 %Ozaukee County: 1.9 %Racine County: 4.7 %Rock County: 0.4 %Sauk County: 0.3 %Sheboygan County: 4.6 %Taylor County: 0 %Vilas County: 0 %Walworth County: 0.8 %Waukesha County: 0.8 %Albany County: 0.8 %Big Horn County: 0 %Campbell County: 1.1 %Carbon County: 0 %Converse County: 0.3 %Fremont County: 0 %Johnson County: 0 %Laramie County: 0.3 %Lincoln County: 0 %Natrona County: 0 %Park County: 0.9 %Platte County: 0 %Sheridan County: 0.8 %Sublette County: 0 %Sweetwater County: 2.2 %Teton County: 0.3 %Uinta County: 0.3 %Weston County: 0.3 %

Boundaries: U.S. Census Bureau cartographic boundary files.