US counties by median Air Quality Index (US EPA), 2010

Riverside County 87, the highest of 1055 counties, 2010

Baldwin County: 47 indexClay County: 53 indexColbert County: 54 indexDeKalb County: 44 indexElmore County: 43 indexEtowah County: 59 indexHouston County: 55 indexJefferson County: 63 indexLawrence County: 45 indexMadison County: 47 indexMobile County: 42 indexMontgomery County: 56 indexMorgan County: 56 indexRussell County: 50 indexShelby County: 48 indexSumter County: 39 indexTalladega County: 55 indexTuscaloosa County: 60 indexWalker County: 54 indexAleutians East Borough: 11 indexAnchorage Municipality: 36 indexDenali Borough: 33 indexFairbanks North Star Borough: 48 indexJuneau City and Borough: 35 indexKenai Peninsula Borough: 7 indexMatanuska-Susitna Borough: 17 indexYukon-Koyukuk Census Area: 6 indexApache County: 14 indexCochise County: 45 indexCoconino County: 47 indexGila County: 44 indexLa Paz County: 48 indexMaricopa County: 64 indexMohave County: 16 indexNavajo County: 44 indexPima County: 49 indexPinal County: 69 indexSanta Cruz County: 47 indexYavapai County: 42 indexYuma County: 41 indexArkansas County: 55 indexAshley County: 54 indexClark County: 35 indexCrittenden County: 44 indexFaulkner County: 54 indexGarland County: 54 indexJackson County: 54 indexNewton County: 40 indexPhillips County: 55 indexPolk County: 45 indexPope County: 54 indexPulaski County: 59 indexSebastian County: 55 indexUnion County: 55 indexVan Buren County: 31 indexWashington County: 42 indexWhite County: 56 indexAlameda County: 52 indexAmador County: 35 indexButte County: 53 indexCalaveras County: 44 indexColusa County: 39 indexContra Costa County: 40 indexDel Norte County: 14 indexEl Dorado County: 42 indexFresno County: 71 indexGlenn County: 44 indexHumboldt County: 30 indexImperial County: 57 indexInyo County: 44 indexKern County: 81 indexKings County: 72 indexLake County: 35 indexLos Angeles County: 78 indexMadera County: 47 indexMarin County: 49 indexMariposa County: 52 indexMendocino County: 42 indexMerced County: 59 indexMono County: 18 indexMonterey County: 40 indexNapa County: 46 indexNevada County: 44 indexOrange County: 61 indexPlacer County: 55 indexPlumas County: 44 indexRiverside County: 87 indexSacramento County: 53 indexSan Benito County: 41 indexSan Bernardino County: 84 indexSan Diego County: 64 indexSan Francisco County: 51 indexSan Joaquin County: 52 indexSan Luis Obispo County: 55 indexSan Mateo County: 42 indexSanta Barbara County: 47 indexSanta Clara County: 51 indexSanta Cruz County: 37 indexShasta County: 43 indexSiskiyou County: 33 indexSolano County: 42 indexSonoma County: 36 indexStanislaus County: 58 indexSutter County: 52 indexTehama County: 55 indexTrinity County: 11 indexTulare County: 72 indexTuolumne County: 41 indexVentura County: 48 indexYolo County: 41 indexAdams County: 44 indexAlamosa County: 20 indexArapahoe County: 48 indexArchuleta County: 17 indexBoulder County: 46 indexChaffee County: 50 indexClear Creek County: 74 indexDelta County: 19 indexDenver County: 51 indexDouglas County: 46 indexElbert County: 23 indexEl Paso County: 46 indexFremont County: 14 indexGarfield County: 51 indexGunnison County: 42 indexJackson County: 9 indexJefferson County: 46 indexLa Plata County: 48 indexLarimer County: 53 indexMesa County: 48 indexMontezuma County: 46 indexPark County: 51 indexPitkin County: 49 indexProwers County: 24 indexPueblo County: 31 indexRio Blanco County: 47 indexRoutt County: 16 indexSan Juan County: 11 indexSan Miguel County: 19 indexSummit County: 12 indexTeller County: 51 indexWeld County: 47 indexKent County: 44 indexNew Castle County: 55 indexSussex County: 48 indexDistrict of Columbia: 55 indexAlachua County: 46 indexBaker County: 36 indexBay County: 52 indexBrevard County: 48 indexBroward County: 49 indexCitrus County: 42 indexCollier County: 46 indexColumbia County: 52 indexDuval County: 52 indexEscambia County: 53 indexHamilton County: 51 indexHighlands County: 36 indexHillsborough County: 55 indexHolmes County: 53 indexIndian River County: 39 indexLake County: 49 indexLee County: 46 indexLeon County: 54 indexLiberty County: 36 indexManatee County: 37 indexMarion County: 49 indexMartin County: 46 indexMiami-Dade County: 53 indexOkaloosa County: 37 indexOrange County: 51 indexOsceola County: 36 indexPalm Beach County: 49 indexPasco County: 39 indexPinellas County: 52 indexPolk County: 51 indexPutnam County: 15 indexSt. Lucie County: 47 indexSanta Rosa County: 52 indexSarasota County: 56 indexSeminole County: 39 indexVolusia County: 46 indexWakulla County: 38 indexBibb County: 58 indexCharlton County: 39 indexChatham County: 52 indexChattooga County: 41 indexClarke County: 54 indexClayton County: 58 indexCobb County: 56 indexCoffee County: 48 indexColumbia County: 44 indexCoweta County: 53 indexDawson County: 43 indexDeKalb County: 61 indexDougherty County: 56 indexDouglas County: 45 indexFloyd County: 61 indexFulton County: 58 indexGlynn County: 42 indexGwinnett County: 54 indexHall County: 60 indexHenry County: 53 indexHouston County: 57 indexLowndes County: 59 indexMurray County: 45 indexMuscogee County: 55 indexPaulding County: 52 indexPike County: 41 indexRichmond County: 54 indexRockdale County: 36 indexSumter County: 42 indexWalker County: 57 indexWashington County: 52 indexWilkinson County: 57 indexHawaii County: 69 indexHonolulu County: 49 indexMaui County: 24 indexAda County: 55 indexBannock County: 23 indexBenewah County: 43 indexBonner County: 9 indexButte County: 43 indexCanyon County: 30 indexCassia County: 45 indexCuster County: 10 indexFranklin County: 58 indexIdaho County: 13 indexKootenai County: 37 indexLatah County: 13 indexLemhi County: 43 indexNez Perce County: 22 indexPower County: 20 indexShoshone County: 54 indexTwin Falls County: 32 indexAdams County: 37 indexChampaign County: 35 indexClark County: 40 indexCook County: 62 indexDuPage County: 54 indexEffingham County: 44 indexHamilton County: 47 indexJackson County: 20 indexJersey County: 38 indexJo Daviess County: 37 indexKane County: 37 indexLake County: 38 indexLaSalle County: 42 indexMcHenry County: 44 indexMcLean County: 41 indexMacon County: 52 indexMacoupin County: 37 indexMadison County: 64 indexPeoria County: 56 indexRandolph County: 36 indexRock Island County: 33 indexSt. Clair County: 52 indexSangamon County: 40 indexWill County: 38 indexWinnebago County: 37 indexAllen County: 61 indexBoone County: 45 indexCarroll County: 45 indexClark County: 61 indexDelaware County: 48 indexDubois County: 58 indexElkhart County: 47 indexFloyd County: 57 indexGibson County: 56 indexGreene County: 47 indexHamilton County: 44 indexHancock County: 45 indexHendricks County: 41 indexHenry County: 55 indexHoward County: 53 indexHuntington County: 41 indexJackson County: 45 indexJohnson County: 44 indexKnox County: 42 indexLake County: 67 indexLaPorte County: 45 indexMadison County: 53 indexMarion County: 64 indexMonroe County: 56 indexMorgan County: 40 indexPerry County: 48 indexPorter County: 57 indexPosey County: 43 indexSt. Joseph County: 58 indexShelby County: 44 indexSpencer County: 57 indexTippecanoe County: 58 indexVanderburgh County: 61 indexVigo County: 57 indexWabash County: 38 indexWarrick County: 48 indexWashington County: 53 indexWhitley County: 50 indexBlack Hawk County: 52 indexBremer County: 38 indexCerro Gordo County: 18 indexClinton County: 59 indexDelaware County: 15 indexHarrison County: 40 indexJohnson County: 57 indexLee County: 53 indexLinn County: 53 indexMontgomery County: 49 indexMuscatine County: 57 indexPalo Alto County: 46 indexPolk County: 51 indexPottawattamie County: 32 indexScott County: 60 indexStory County: 36 indexTama County: 42 indexVan Buren County: 42 indexWarren County: 37 indexWoodbury County: 45 indexBrown County: 38 indexChase County: 31 indexFord County: 14 indexJohnson County: 41 indexLeavenworth County: 36 indexLinn County: 40 indexNeosho County: 19 indexRiley County: 38 indexSedgwick County: 44 indexShawnee County: 41 indexSherman County: 19 indexSumner County: 43 indexTrego County: 43 indexWyandotte County: 52 indexBell County: 48 indexBoone County: 42 indexBoyd County: 52 indexBullitt County: 54 indexCampbell County: 52 indexCarter County: 47 indexChristian County: 51 indexDaviess County: 57 indexEdmonson County: 44 indexFayette County: 53 indexFranklin County: 55 indexGreenup County: 43 indexHancock County: 46 indexHardin County: 53 indexHenderson County: 52 indexJefferson County: 45 indexJessamine County: 46 indexKenton County: 50 indexLivingston County: 43 indexMcCracken County: 51 indexMadison County: 53 indexMarshall County: 16 indexMorgan County: 41 indexOhio County: 48 indexOldham County: 48 indexPerry County: 46 indexPike County: 47 indexPulaski County: 44 indexSimpson County: 46 indexTrigg County: 45 indexWarren County: 51 indexWashington County: 41 indexAscension Parish: 36 indexBossier Parish: 52 indexCaddo Parish: 44 indexCalcasieu Parish: 53 indexEast Baton Rouge Parish: 57 indexIberville Parish: 45 indexJefferson Parish: 53 indexLafayette Parish: 58 indexLafourche Parish: 46 indexLivingston Parish: 49 indexOrleans Parish: 49 indexOuachita Parish: 45 indexPointe Coupee Parish: 41 indexRapides Parish: 46 indexSt. Bernard Parish: 58 indexSt. Charles Parish: 35 indexSt. James Parish: 37 indexSt. John the Baptist Parish: 38 indexSt. Tammany Parish: 50 indexTangipahoa Parish: 49 indexTerrebonne Parish: 47 indexWest Baton Rouge Parish: 59 indexWinn Parish: 42 indexAndroscoggin County: 39 indexAroostook County: 35 indexCumberland County: 39 indexHancock County: 37 indexKennebec County: 36 indexKnox County: 40 indexOxford County: 34 indexPenobscot County: 38 indexPiscataquis County: 21 indexSagadahoc County: 38 indexWashington County: 35 indexYork County: 36 indexAnne Arundel County: 53 indexBaltimore County: 46 indexCalvert County: 47 indexCarroll County: 46 indexCecil County: 52 indexCharles County: 47 indexDorchester County: 40 indexFrederick County: 49 indexGarrett County: 48 indexHarford County: 50 indexKent County: 46 indexMontgomery County: 53 indexPrince George's County: 56 indexWashington County: 54 indexWorcester County: 45 indexBaltimore city: 55 indexBarnstable County: 40 indexBerkshire County: 41 indexBristol County: 44 indexDukes County: 42 indexEssex County: 44 indexHampden County: 49 indexHampshire County: 39 indexMiddlesex County: 35 indexNorfolk County: 40 indexPlymouth County: 39 indexSuffolk County: 54 indexWorcester County: 49 indexAllegan County: 44 indexBay County: 33 indexBenzie County: 41 indexBerrien County: 45 indexCass County: 45 indexChippewa County: 31 indexClinton County: 42 indexGenesee County: 45 indexHuron County: 40 indexIngham County: 40 indexKalamazoo County: 44 indexKent County: 38 indexKeweenaw County: 14 indexLenawee County: 46 indexMacomb County: 46 indexManistee County: 40 indexMason County: 39 indexMissaukee County: 35 indexMonroe County: 47 indexMuskegon County: 43 indexOakland County: 44 indexOttawa County: 44 indexSt. Clair County: 42 indexSchoolcraft County: 33 indexTuscola County: 36 indexWashtenaw County: 39 indexWayne County: 56 indexWexford County: 35 indexAnoka County: 53 indexBecker County: 37 indexCarlton County: 18 indexCass County: 22 indexCook County: 27 indexCrow Wing County: 39 indexDakota County: 48 indexGoodhue County: 38 indexHennepin County: 44 indexLake County: 30 indexLyon County: 52 indexMille Lacs County: 33 indexOlmsted County: 50 indexRamsey County: 50 indexRock County: 34 indexSt. Louis County: 41 indexScott County: 38 indexStearns County: 40 indexWashington County: 40 indexWinona County: 31 indexWright County: 51 indexAdams County: 44 indexBolivar County: 54 indexDeSoto County: 54 indexForrest County: 55 indexGrenada County: 51 indexHancock County: 44 indexHarrison County: 54 indexHinds County: 54 indexJackson County: 41 indexJones County: 58 indexLauderdale County: 54 indexLee County: 54 indexYalobusha County: 36 indexAndrew County: 41 indexBoone County: 40 indexBuchanan County: 54 indexCallaway County: 42 indexCass County: 53 indexCedar County: 53 indexClay County: 52 indexClinton County: 44 indexGreene County: 44 indexJackson County: 55 indexJasper County: 39 indexJefferson County: 54 indexLincoln County: 44 indexMonroe County: 41 indexPerry County: 47 indexSt. Charles County: 40 indexSte. Genevieve County: 43 indexSt. Louis County: 56 indexStoddard County: 49 indexTaney County: 42 indexSt. Louis city: 61 indexCascade County: 39 indexFergus County: 14 indexFlathead County: 49 indexGallatin County: 38 indexGlacier County: 41 indexLake County: 13 indexLewis and Clark County: 33 indexLincoln County: 52 indexMissoula County: 61 indexPowder River County: 39 indexPowell County: 13 indexRavalli County: 37 indexRichland County: 38 indexRoosevelt County: 20 indexRosebud County: 35 indexSanders County: 31 indexSheridan County: 17 indexSilver Bow County: 39 indexYellowstone County: 26 indexCass County: 21 indexDawson County: 19 indexDouglas County: 52 indexGarden County: 18 indexHall County: 35 indexKnox County: 36 indexLancaster County: 30 indexSarpy County: 54 indexScotts Bluff County: 43 indexThomas County: 22 indexWashington County: 44 indexChurchill County: 40 indexClark County: 58 indexDouglas County: 8 indexElko County: 20 indexLyon County: 37 indexMineral County: 11 indexNye County: 27 indexWashoe County: 47 indexWhite Pine County: 45 indexCarson City: 38 indexBelknap County: 38 indexCheshire County: 42 indexCoos County: 44 indexGrafton County: 38 indexHillsborough County: 39 indexMerrimack County: 40 indexRockingham County: 39 indexAtlantic County: 44 indexBergen County: 39 indexCamden County: 50 indexCumberland County: 43 indexEssex County: 45 indexGloucester County: 41 indexHudson County: 52 indexHunterdon County: 47 indexMercer County: 48 indexMiddlesex County: 43 indexMonmouth County: 34 indexMorris County: 39 indexOcean County: 46 indexPassaic County: 42 indexUnion County: 54 indexWarren County: 41 indexBernalillo County: 61 indexCatron County: 13 indexChaves County: 27 indexDoña Ana County: 56 indexEddy County: 39 indexGrant County: 45 indexLea County: 37 indexLincoln County: 15 indexLos Alamos County: 13 indexLuna County: 39 indexMcKinley County: 12 indexRio Arriba County: 12 indexSandoval County: 48 indexSan Juan County: 45 indexSanta Fe County: 44 indexSocorro County: 15 indexTaos County: 19 indexValencia County: 43 indexAlbany County: 44 indexBronx County: 54 indexChautauqua County: 40 indexChemung County: 35 indexDutchess County: 34 indexErie County: 53 indexEssex County: 42 indexFranklin County: 12 indexHamilton County: 36 indexHerkimer County: 36 indexJefferson County: 35 indexKings County: 49 indexMadison County: 36 indexMonroe County: 40 indexNassau County: 44 indexNew York County: 57 indexNiagara County: 47 indexOneida County: 38 indexOnondaga County: 34 indexOrange County: 43 indexOswego County: 34 indexPutnam County: 36 indexQueens County: 52 indexRensselaer County: 36 indexRichmond County: 48 indexRockland County: 42 indexSaratoga County: 35 indexSchenectady County: 31 indexSteuben County: 38 indexSuffolk County: 44 indexTompkins County: 37 indexUlster County: 37 indexWayne County: 35 indexWestchester County: 43 indexAlamance County: 53 indexAlexander County: 46 indexAvery County: 44 indexBuncombe County: 52 indexCaldwell County: 44 indexCarteret County: 37 indexCaswell County: 51 indexCatawba County: 54 indexChatham County: 44 indexCumberland County: 54 indexDavidson County: 54 indexDavie County: 48 indexDuplin County: 47 indexDurham County: 53 indexEdgecombe County: 48 indexForsyth County: 58 indexFranklin County: 44 indexGaston County: 54 indexGraham County: 48 indexGranville County: 48 indexGuilford County: 54 indexHaywood County: 50 indexHyde County: 32 indexJackson County: 51 indexJohnston County: 49 indexLenoir County: 47 indexLincoln County: 46 indexMcDowell County: 52 indexMacon County: 36 indexMartin County: 48 indexMecklenburg County: 59 indexMitchell County: 52 indexMontgomery County: 43 indexNew Hanover County: 44 indexPerson County: 48 indexPitt County: 47 indexRobeson County: 52 indexRockingham County: 49 indexRowan County: 56 indexSwain County: 53 indexUnion County: 45 indexWake County: 56 indexWatauga County: 47 indexWayne County: 53 indexYancey County: 48 indexBillings County: 38 indexBurke County: 40 indexBurleigh County: 42 indexCass County: 44 indexDunn County: 41 indexMcKenzie County: 41 indexMercer County: 40 indexOliver County: 37 indexWard County: 5 indexAdams County: 57 indexAllen County: 49 indexAshtabula County: 44 indexAthens County: 33 indexButler County: 49 indexClark County: 57 indexClermont County: 58 indexClinton County: 49 indexColumbiana County: 23 indexCrawford County: 41 indexCuyahoga County: 65 indexDelaware County: 44 indexFayette County: 40 indexFranklin County: 56 indexGeauga County: 46 indexGreene County: 55 indexHamilton County: 71 indexHancock County: 22 indexJefferson County: 57 indexKnox County: 42 indexLake County: 52 indexLawrence County: 59 indexLicking County: 46 indexLorain County: 55 indexLucas County: 53 indexMadison County: 47 indexMahoning County: 55 indexMedina County: 48 indexMiami County: 44 indexMontgomery County: 59 indexNoble County: 43 indexPortage County: 43 indexPreble County: 56 indexScioto County: 24 indexStark County: 60 indexSummit County: 63 indexTrumbull County: 54 indexWarren County: 59 indexWashington County: 46 indexWood County: 44 indexAdair County: 60 indexCaddo County: 40 indexCanadian County: 37 indexCarter County: 39 indexCherokee County: 40 indexCleveland County: 52 indexComanche County: 52 indexCreek County: 38 indexDewey County: 44 indexEllis County: 27 indexJefferson County: 40 indexKay County: 51 indexLincoln County: 33 indexLove County: 43 indexMcClain County: 37 indexMcCurtain County: 38 indexMayes County: 45 indexMuskogee County: 33 indexOklahoma County: 54 indexOsage County: 38 indexOttawa County: 51 indexPittsburg County: 53 indexSequoyah County: 38 indexTulsa County: 59 indexBaker County: 33 indexBenton County: 20 indexClackamas County: 27 indexColumbia County: 29 indexCrook County: 27 indexDeschutes County: 34 indexDouglas County: 28 indexGrant County: 33 indexHarney County: 33 indexJackson County: 39 indexJefferson County: 33 indexJosephine County: 29 indexKlamath County: 35 indexLake County: 28 indexLane County: 47 indexLinn County: 34 indexMarion County: 31 indexMultnomah County: 36 indexUmatilla County: 40 indexUnion County: 33 indexWallowa County: 26 indexWasco County: 25 indexWashington County: 33 indexYamhill County: 21 indexAdams County: 54 indexAllegheny County: 69 indexArmstrong County: 56 indexBeaver County: 54 indexBerks County: 50 indexBlair County: 34 indexBucks County: 54 indexCambria County: 58 indexCentre County: 50 indexChester County: 57 indexClearfield County: 45 indexCumberland County: 59 indexDauphin County: 53 indexDelaware County: 56 indexElk County: 37 indexErie County: 51 indexFranklin County: 45 indexGreene County: 45 indexIndiana County: 45 indexLackawanna County: 46 indexLancaster County: 54 indexLawrence County: 33 indexLehigh County: 31 indexLuzerne County: 29 indexLycoming County: 40 indexMercer County: 52 indexMonroe County: 45 indexMontgomery County: 52 indexNorthampton County: 58 indexPerry County: 30 indexPhiladelphia County: 57 indexSomerset County: 37 indexTioga County: 44 indexWashington County: 59 indexWestmoreland County: 58 indexYork County: 56 indexKent County: 38 indexProvidence County: 43 indexWashington County: 43 indexAbbeville County: 41 indexAiken County: 39 indexAnderson County: 41 indexBerkeley County: 35 indexCharleston County: 52 indexCherokee County: 40 indexChesterfield County: 44 indexColleton County: 36 indexDarlington County: 41 indexEdgefield County: 41 indexFlorence County: 53 indexGeorgetown County: 22 indexGreenville County: 56 indexHorry County: 41 indexLexington County: 54 indexOconee County: 41 indexPickens County: 41 indexRichland County: 54 indexSpartanburg County: 56 indexYork County: 35 indexBrookings County: 37 indexBrown County: 41 indexCodington County: 23 indexCuster County: 40 indexJackson County: 37 indexMeade County: 37 indexMinnehaha County: 49 indexPennington County: 33 indexUnion County: 47 indexAnderson County: 44 indexBlount County: 48 indexBradley County: 16 indexClaiborne County: 37 indexDavidson County: 56 indexDeKalb County: 38 indexHamilton County: 52 indexJefferson County: 46 indexKnox County: 44 indexLawrence County: 55 indexLoudon County: 45 indexMcMinn County: 18 indexMadison County: 15 indexMeigs County: 46 indexMontgomery County: 55 indexRoane County: 57 indexRutherford County: 45 indexSevier County: 50 indexShelby County: 58 indexSullivan County: 40 indexSumner County: 49 indexUnion County: 23 indexWilliamson County: 45 indexWilson County: 46 indexBell County: 37 indexBexar County: 51 indexBowie County: 56 indexBrazoria County: 36 indexBrewster County: 44 indexCameron County: 48 indexCollin County: 38 indexCulberson County: 18 indexDallas County: 54 indexDenton County: 49 indexEctor County: 41 indexEllis County: 50 indexEl Paso County: 58 indexFayette County: 40 indexGalveston County: 45 indexGregg County: 37 indexHarris County: 60 indexHarrison County: 52 indexHays County: 34 indexHidalgo County: 50 indexHood County: 35 indexHunt County: 36 indexJeff Davis County: 21 indexJefferson County: 54 indexJohnson County: 36 indexKaufman County: 49 indexKleberg County: 47 indexLubbock County: 35 indexMcLennan County: 44 indexMaverick County: 39 indexMontgomery County: 53 indexNavarro County: 49 indexNueces County: 47 indexOrange County: 52 indexParker County: 38 indexPolk County: 39 indexPotter County: 31 indexRandall County: 40 indexRockwall County: 37 indexSmith County: 38 indexTarrant County: 53 indexTravis County: 46 indexVictoria County: 32 indexWebb County: 48 indexWichita County: 34 indexBox Elder County: 47 indexCache County: 55 indexDaggett County: 47 indexDavis County: 40 indexGarfield County: 11 indexSalt Lake County: 52 indexSan Juan County: 47 indexTooele County: 51 indexUintah County: 54 indexUtah County: 54 indexWashington County: 48 indexWayne County: 12 indexWeber County: 54 indexBennington County: 38 indexChittenden County: 41 indexRutland County: 38 indexAlbemarle County: 48 indexArlington County: 43 indexCaroline County: 46 indexCarroll County: 13 indexCharles City County: 41 indexChesterfield County: 48 indexCulpeper County: 14 indexFairfax County: 52 indexFauquier County: 43 indexFrederick County: 46 indexGiles County: 43 indexHanover County: 49 indexHenrico County: 52 indexKing William County: 13 indexLoudoun County: 42 indexMadison County: 44 indexPage County: 48 indexPrince Edward County: 39 indexPrince William County: 31 indexRoanoke County: 37 indexRockbridge County: 45 indexRockingham County: 43 indexStafford County: 46 indexWarren County: 15 indexWythe County: 44 indexAlexandria city: 43 indexBristol city: 54 indexFredericksburg city: 15 indexHampton city: 45 indexHopewell city: 14 indexLynchburg city: 48 indexNewport News city: 23 indexNorfolk city: 52 indexRichmond city: 22 indexRoanoke city: 52 indexSalem city: 52 indexSuffolk city: 47 indexVirginia Beach city: 48 indexWinchester city: 14 indexAdams County: 23 indexAsotin County: 34 indexBenton County: 27 indexChelan County: 29 indexClallam County: 38 indexClark County: 31 indexColumbia County: 24 indexCowlitz County: 21 indexFranklin County: 27 indexGrant County: 27 indexGrays Harbor County: 22 indexJefferson County: 24 indexKing County: 45 indexKitsap County: 24 indexKittitas County: 26 indexKlickitat County: 22 indexLewis County: 25 indexMason County: 28 indexOkanogan County: 38 indexPend Oreille County: 18 indexPierce County: 43 indexSkagit County: 31 indexSnohomish County: 36 indexSpokane County: 43 indexStevens County: 41 indexThurston County: 27 indexWalla Walla County: 29 indexWhatcom County: 32 indexWhitman County: 24 indexYakima County: 34 indexBerkeley County: 51 indexBrooke County: 21 indexCabell County: 49 indexGilmer County: 32 indexGreenbrier County: 44 indexHancock County: 43 indexHarrison County: 56 indexKanawha County: 44 indexMarion County: 58 indexMarshall County: 58 indexMonongalia County: 49 indexOhio County: 53 indexRaleigh County: 52 indexTucker County: 39 indexWood County: 51 indexAshland County: 34 indexBrown County: 46 indexChippewa County: 8 indexColumbia County: 40 indexDane County: 55 indexDodge County: 46 indexDoor County: 37 indexEau Claire County: 40 indexFlorence County: 34 indexFond du Lac County: 39 indexForest County: 36 indexGrant County: 49 indexJefferson County: 41 indexKenosha County: 47 indexKewaunee County: 39 indexLa Crosse County: 42 indexManitowoc County: 38 indexMarathon County: 38 indexMilwaukee County: 44 indexOneida County: 36 indexOutagamie County: 40 indexOzaukee County: 42 indexRacine County: 42 indexRock County: 41 indexSt. Croix County: 42 indexSauk County: 40 indexSheboygan County: 41 indexTaylor County: 36 indexVernon County: 39 indexVilas County: 37 indexWalworth County: 41 indexWashington County: 39 indexWaukesha County: 41 indexAlbany County: 48 indexBig Horn County: 38 indexCampbell County: 46 indexCarbon County: 45 indexConverse County: 23 indexCrook County: 43 indexFremont County: 48 indexJohnson County: 8 indexLaramie County: 23 indexLincoln County: 17 indexNatrona County: 22 indexPark County: 21 indexPlatte County: 12 indexSheridan County: 22 indexSublette County: 48 indexSweetwater County: 45 indexTeton County: 44 indexUinta County: 44 index

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