SmogRank / Countries / United States / 2026
Most polluted cities in United States, 2026
664 cities in United States ranked by their average PM2.5 so far (273 of 365 days); 595 above the WHO annual guideline (5.0 µg/m³). Worst: Calexico at 21.6 µg/m³, #215 of 2,181 cities in the world. Cleanest: Oro Valley at 0.2. A city needs measurements on 70% of the days to be ranked.
- 1CalexicoCalifornia 21.64.3×
- 2Jurupa ValleyCalifornia 14.12.8×
- 3LaredoTexas 13.62.7×
- 4Wake Forestlow-cost sensorsNorth Carolina 13.22.6×
- 5NampaIdaho 12.82.6×
- 6WyomingMichigan 12.72.5×
- 7MaconGeorgia 12.62.5×
- 7Royal Oaklow-cost sensorsMichigan 12.62.5×
- 7RiversideCalifornia 12.62.5×
- 10PerrysburgOhio 12.52.5×
- 10WhittierCalifornia 12.52.5×
- 12MissionTexas 12.32.5×
- 12Tularelow-cost sensorsCalifornia 12.32.5×
- 14Camdenlow-cost sensorsNew Jersey 12.22.4×
- 14Delanolow-cost sensorsCalifornia 12.22.4×
- 14VisaliaCalifornia 12.22.4×
- 17BakersfieldCalifornia 11.92.4×
- 18El PasoTexas 11.72.3×
- 19OregonOhio 11.62.3×
- 19SuperiorWisconsin 11.62.3×
- 21Corpus ChristiTexas 11.52.3×
- 21FontanaCalifornia 11.52.3×
- 23ShreveportLouisiana 11.42.3×
- 23BaytownTexas 11.42.3×
- 23EdinburgTexas 11.42.3×
- 26BrownsvilleTexas 11.32.3×
- 26RedfordMichigan 11.32.3×
- 26CorcoranCalifornia 11.32.3×
- 26Eagle PassTexas 11.32.3×
- 30PhiladelphiaPennsylvania 11.22.2×
- 30YorkPennsylvania 11.22.2×
- 30Franklin ParkIllinois 11.22.2×
- 30ToledoOhio 11.22.2×
- 30Los AngelesCalifornia 11.22.2×
- 35BrookfieldIllinois 11.12.2×
- 35ComptonCalifornia 11.12.2×
- 35Redmondlow-cost sensorsWashington 11.12.2×
- 38Little RockArkansas 11.02.2×
- 38DoltonIllinois 11.02.2×
- 38FresnoCalifornia 11.02.2×
- 41MiddletownOhio 10.92.2×
- 41BridgeviewIllinois 10.92.2×
- 41Oconomowoclow-cost sensorsWisconsin 10.92.2×
- 44PortsmouthOhio 10.82.2×
- 44ElginIllinois 10.82.2×
- 44ClevelandOhio 10.82.2×
- 47DetroitMichigan 10.72.1×
- 47HanfordCalifornia 10.72.1×
- 49SpartanburgSouth Carolina 10.62.1×
- 49AustinTexas 10.62.1×
- 49San AntonioTexas 10.62.1×
- 49WestervilleOhio 10.62.1×
- 49LancasterPennsylvania 10.62.1×
- 49South Lake TahoeCalifornia 10.62.1×
- 49Great FallsMontana 10.62.1×
- 56West MemphisArkansas 10.52.1×
- 56HoustonTexas 10.52.1×
- 56DearbornMichigan 10.52.1×
- 56WenatcheeWashington 10.52.1×
- 60AugustaGeorgia 10.42.1×
- 61FlintMichigan 10.32.1×
- 61Lincoln ParkMichigan 10.32.1×
- 61SteubenvilleOhio 10.32.1×
- 64SpringdaleArkansas 10.22.0×
- 64ChattanoogaTennessee 10.22.0×
- 64Calumet CityIllinois 10.22.0×
- 64Elmwood ParkIllinois 10.22.0×
- 64Oak LawnIllinois 10.22.0×
- 64Grand RapidsMichigan 10.22.0×
- 64West MifflinPennsylvania 10.22.0×
- 71ValdostaGeorgia 10.12.0×
- 71TulsaOklahoma 10.12.0×
- 71Live OakTexas 10.12.0×
- 71Evanstonlow-cost sensorsIllinois 10.12.0×
- 71AnaheimCalifornia 10.12.0×
- 76WichitaKansas 10.02.0×
- 76PasadenaTexas 10.02.0×
- 76Fort WayneIndiana 10.02.0×
- 76Bay CityMichigan 10.02.0×
- 76CantonOhio 10.02.0×
- 76LewistonIdaho 10.02.0×
- 82PennsaukenNew Jersey 9.92.0×
- 82ChicagoIllinois 9.92.0×
- 82KalamazooMichigan 9.92.0×
- 82LebanonPennsylvania 9.92.0×
- 82PortervilleCalifornia 9.92.0×
- 87NorwoodOhio 9.82.0×
- 87FlorenceSouth Carolina 9.82.0×
- 87TexarkanaTexas 9.82.0×
- 87SocorroTexas 9.82.0×
- 91Warner RobinsGeorgia 9.71.9×
- 91Granite CityIllinois 9.71.9×
- 91Port HuronMichigan 9.71.9×
- 91DuluthMinnesota 9.71.9×
- 91LimaOhio 9.71.9×
- 91HarrisburgPennsylvania 9.71.9×
- 91WaukeshaWisconsin 9.71.9×
- 91ClovisCalifornia 9.71.9×
- 91Inglewoodlow-cost sensorsCalifornia 9.71.9×
- 100TallahasseeFlorida 9.61.9×
- 100AlbanyGeorgia 9.61.9×
- 100NapervilleIllinois 9.61.9×
- 100HammondIndiana 9.61.9×
- 100SouthfieldMichigan 9.61.9×
- 100MedinaOhio 9.61.9×
- 100WarrenOhio 9.61.9×
- 100Brookfieldlow-cost sensorsWisconsin 9.61.9×
- 100San DiegoCalifornia 9.61.9×
- 109IndianapolisIndiana 9.51.9×
- 109ColumbusOhio 9.51.9×
- 109WaterlooIowa 9.51.9×
- 109RockfordIllinois 9.51.9×
- 109PortageIndiana 9.51.9×
- 109LansingMichigan 9.51.9×
- 109Green BayWisconsin 9.51.9×
- 116ColumbusGeorgia 9.41.9×
- 116McAlesterOklahoma 9.41.9×
- 116Des PlainesIllinois 9.41.9×
- 116TaylorMichigan 9.41.9×
- 116YpsilantiMichigan 9.41.9×
- 116Long BeachCalifornia 9.41.9×
- 116MaderaCalifornia 9.41.9×
- 123MonroeLouisiana 9.31.9×
- 123FayettevilleNorth Carolina 9.31.9×
- 123LexingtonNorth Carolina 9.31.9×
- 123NashvilleTennessee 9.31.9×
- 123Fort WorthTexas 9.31.9×
- 123NorthbrookIllinois 9.31.9×
- 123PeoriaIllinois 9.31.9×
- 123MarquetteMichigan 9.31.9×
- 123BensalemPennsylvania 9.31.9×
- 123MilwaukeeWisconsin 9.31.9×
- 123South MilwaukeeWisconsin 9.31.9×
- 123BurbankCalifornia 9.31.9×
- 123GlendoraCalifornia 9.31.9×
- 136MontgomeryAlabama 9.21.8×
- 136AthensGeorgia 9.21.8×
- 136JacksonMississippi 9.21.8×
- 136MooreOklahoma 9.21.8×
- 136BartlettTennessee 9.21.8×
- 136ConroeTexas 9.21.8×
- 136Missouri CityTexas 9.21.8×
- 136ElkhartIndiana 9.21.8×
- 136JenisonMichigan 9.21.8×
- 136PittsburghPennsylvania 9.21.8×
- 136MercedCalifornia 9.21.8×
- 136Candler-McAfeeGeorgia 9.21.8×
- 148Upper AltonIllinois 9.11.8×
- 148DerbyKansas 9.11.8×
- 148CarlislePennsylvania 9.11.8×
- 148ReadingPennsylvania 9.11.8×
- 152BirminghamAlabama 9.01.8×
- 152WilmingtonDelaware 9.01.8×
- 152Kendale LakesFlorida 9.01.8×
- 152AtlantaGeorgia 9.01.8×
- 152LouisvilleKentucky 9.01.8×
- 152BaltimoreMaryland 9.01.8×
- 152DaytonOhio 9.01.8×
- 152East ChicagoIndiana 9.01.8×
- 152EastpointeMichigan 9.01.8×
- 152AppletonWisconsin 9.01.8×
- 152Chula VistaCalifornia 9.01.8×
- 163GadsdenAlabama 8.91.8×
- 163DoverDelaware 8.91.8×
- 163TopekaKansas 8.91.8×
- 163OwensboroKentucky 8.91.8×
- 163Oklahoma CityOklahoma 8.91.8×
- 163North CharlestonSouth Carolina 8.91.8×
- 163Saint AndrewsSouth Carolina 8.91.8×
- 163DentonTexas 8.91.8×
- 163Mission BendTexas 8.91.8×
- 163AuroraIllinois 8.91.8×
- 163AkronOhio 8.91.8×
- 163WilkinsburgPennsylvania 8.91.8×
- 163Mission ViejoCalifornia 8.91.8×
- 163Santa Monicalow-cost sensorsCalifornia 8.91.8×
- 163BoiseIdaho 8.91.8×
- 163MillcreekUtah 8.91.8×
- 163MidwayFlorida 8.91.8×
- 180SavannahGeorgia 8.81.8×
- 180EvansvilleIndiana 8.81.8×
- 180JeffersonvilleIndiana 8.81.8×
- 180AshlandKentucky 8.81.8×
- 180HattiesburgMississippi 8.81.8×
- 180CincinnatiOhio 8.81.8×
- 180Ponca CityOklahoma 8.81.8×
- 180Cleveland HeightsOhio 8.81.8×
- 180South BendIndiana 8.81.8×
- 180SpokaneWashington 8.81.8×
- 190WashingtonDistrict of Columbia 8.71.7×
- 190LawrencevilleGeorgia 8.71.7×
- 190Valley StationKentucky 8.71.7×
- 190CharlotteNorth Carolina 8.71.7×
- 190MorrisvilleNorth Carolina 8.71.7×
- 190Winston-SalemNorth Carolina 8.71.7×
- 190SpringfieldOhio 8.71.7×
- 190JenksOklahoma 8.71.7×
- 190Port ArthurTexas 8.71.7×
- 190JolietIllinois 8.71.7×
- 190GaryIndiana 8.71.7×
- 190Michigan CityIndiana 8.71.7×
- 190BuffaloNew York 8.71.7×
- 190Shaker HeightsOhio 8.71.7×
- 190Lake ElsinoreCalifornia 8.71.7×
- 190RichmondCalifornia 8.71.7×
- 190Coeur d'AleneIdaho 8.71.7×
- 207OcalaFlorida 8.61.7×
- 207St. LouisMissouri 8.61.7×
- 207CorsicanaTexas 8.61.7×
- 207El CajonCalifornia 8.61.7×
- 207OceansideCalifornia 8.61.7×
- 207PendletonOregon 8.61.7×
- 207Moses LakeWashington 8.61.7×
- 214Ponte Vedra BeachFlorida 8.51.7×
- 214East Saint LouisIllinois 8.51.7×
- 214Kansas CityKansas 8.51.7×
- 214New OrleansLouisiana 8.51.7×
- 214EdmondOklahoma 8.51.7×
- 214SaginawTexas 8.51.7×
- 214CaryIllinois 8.51.7×
- 214New York CityNew York 8.51.7×
- 214YoungstownOhio 8.51.7×
- 214WeirtonWest Virginia 8.51.7×
- 214OdessaTexas 8.51.7×
- 214Spokane ValleyWashington 8.51.7×
- 214YakimaWashington 8.51.7×
- 227DecaturAlabama 8.41.7×
- 227HuntsvilleAlabama 8.41.7×
- 227GainesvilleGeorgia 8.41.7×
- 227SulphurLouisiana 8.41.7×
- 227ChesterPennsylvania 8.41.7×
- 227GreenvilleSouth Carolina 8.41.7×
- 227KnoxvilleTennessee 8.41.7×
- 227College StationTexas 8.41.7×
- 227SpringfieldVirginia 8.41.7×
- 227EwingNew Jersey 8.41.7×
- 227NorristownPennsylvania 8.41.7×
- 227NogalesArizona 8.41.7×
- 227Huntington Beachlow-cost sensorsCalifornia 8.41.7×
- 227Torrancelow-cost sensorsCalifornia 8.41.7×
- 241Ferry PassFlorida 8.31.7×
- 241Baton RougeLouisiana 8.31.7×
- 241HernandoMississippi 8.31.7×
- 241ClemmonsNorth Carolina 8.31.7×
- 241HendersonvilleTennessee 8.31.7×
- 241JacksonTennessee 8.31.7×
- 241GalvestonTexas 8.31.7×
- 241ChesapeakeVirginia 8.31.7×
- 241ZionIllinois 8.31.7×
- 241MuncieIndiana 8.31.7×
- 241MinneapolisMinnesota 8.31.7×
- 241ElizabethNew Jersey 8.31.7×
- 241JohnstownPennsylvania 8.31.7×
- 241Eau ClaireWisconsin 8.31.7×
- 241Pasadenalow-cost sensorsCalifornia 8.31.7×
- 241San JoseCalifornia 8.31.7×
- 241Santa ClaritaCalifornia 8.31.7×
- 241Walla WallaWashington 8.31.7×
- 259BessemerAlabama 8.21.6×
- 259VeniceFlorida 8.21.6×
- 259DecaturIllinois 8.21.6×
- 259BloomingtonIndiana 8.21.6×
- 259South LaurelMaryland 8.21.6×
- 259BeltonTexas 8.21.6×
- 259CharlottesvilleVirginia 8.21.6×
- 259ClintonIowa 8.21.6×
- 259DublinOhio 8.21.6×
- 259BethlehemPennsylvania 8.21.6×
- 259TurlockCalifornia 8.21.6×
- 259SunnysideWashington 8.21.6×
- 271BearDelaware 8.11.6×
- 271NewarkDelaware 8.11.6×
- 271JasperIndiana 8.11.6×
- 271New AlbanyIndiana 8.11.6×
- 271OlatheKansas 8.11.6×
- 271Hunt ValleyMaryland 8.11.6×
- 271Saint JosephMissouri 8.11.6×
- 271San MarcosTexas 8.11.6×
- 271AshburnVirginia 8.11.6×
- 271HollandMichigan 8.11.6×
- 271BurnsvilleMinnesota 8.11.6×
- 271McKeesportPennsylvania 8.11.6×
- 271State CollegePennsylvania 8.11.6×
- 271PhoenixArizona 8.11.6×
- 271PowayCalifornia 8.11.6×
- 271San Luis ObispoCalifornia 8.11.6×
- 271Sunland ParkNew Mexico 8.11.6×
- 288PrichardAlabama 8.01.6×
- 288TaylorTexas 8.01.6×
- 288CharlestonWest Virginia 8.01.6×
- 288Fort DodgeIowa 8.01.6×
- 288Iowa CityIowa 8.01.6×
- 288Jersey CityNew Jersey 8.01.6×
- 288MantecaCalifornia 8.01.6×
- 288ModestoCalifornia 8.01.6×
- 288StocktonCalifornia 8.01.6×
- 288West JordanUtah 8.01.6×
- 298Bonita SpringsFlorida 7.91.6×
- 298Saint MatthewsKentucky 7.91.6×
- 298Columbialow-cost sensorsMissouri 7.91.6×
- 298GulfportMississippi 7.91.6×
- 298ClaytonNorth Carolina 7.91.6×
- 298Toms RiverNew Jersey 7.91.6×
- 298LawtonOklahoma 7.91.6×
- 298Cedar ParkTexas 7.91.6×
- 298La PorteTexas 7.91.6×
- 298HarrisonburgVirginia 7.91.6×
- 298PortlandMaine 7.91.6×
- 298Saint PaulMinnesota 7.91.6×
- 298HermitagePennsylvania 7.91.6×
- 298MadisonWisconsin 7.91.6×
- 298OaklandCalifornia 7.91.6×
- 313LemayMissouri 7.81.6×
- 313GreensboroNorth Carolina 7.81.6×
- 313HickoryNorth Carolina 7.81.6×
- 313RaleighNorth Carolina 7.81.6×
- 313AndersonIndiana 7.81.6×
- 313BlaineMinnesota 7.81.6×
- 313ScrantonPennsylvania 7.81.6×
- 313Upper Saint ClairPennsylvania 7.81.6×
- 313Santa BarbaraCalifornia 7.81.6×
- 313VictorvilleCalifornia 7.81.6×
- 313BillingsMontana 7.81.6×
- 313BadgerAlaska 7.81.6×
- 325MiamiFlorida 7.71.5×
- 325BrunswickGeorgia 7.71.5×
- 325JeffersontownKentucky 7.71.5×
- 325KennerLouisiana 7.71.5×
- 325MaryvilleTennessee 7.71.5×
- 325HopewellVirginia 7.71.5×
- 325Rose HillVirginia 7.71.5×
- 325MuscatineIowa 7.71.5×
- 325ChampaignIllinois 7.71.5×
- 325MolineIllinois 7.71.5×
- 325MankatoMinnesota 7.71.5×
- 325LindenNew Jersey 7.71.5×
- 325PatersonNew Jersey 7.71.5×
- 325AllentownPennsylvania 7.71.5×
- 325EriePennsylvania 7.71.5×
- 325WoodlandCalifornia 7.71.5×
- 325HermistonOregon 7.71.5×
- 342SpringfieldIllinois 7.61.5×
- 342ChalmetteLouisiana 7.61.5×
- 342SpringfieldMissouri 7.61.5×
- 342GreenvilleNorth Carolina 7.61.5×
- 342ClarksvilleTennessee 7.61.5×
- 342ColumbiaTennessee 7.61.5×
- 342PflugervilleTexas 7.61.5×
- 342RichmondVirginia 7.61.5×
- 342Short PumpVirginia 7.61.5×
- 342Cedar RapidsIowa 7.61.5×
- 342DavenportIowa 7.61.5×
- 342Fort LeeNew Jersey 7.61.5×
- 342AlbanyNew York 7.61.5×
- 342HolbrookNew York 7.61.5×
- 342Simi ValleyCalifornia 7.61.5×
- 342Yuba CityCalifornia 7.61.5×
- 358AshevilleNorth Carolina 7.51.5×
- 358Roanoke RapidsNorth Carolina 7.51.5×
- 358MasonOhio 7.51.5×
- 358Des MoinesIowa 7.51.5×
- 358RochesterMinnesota 7.51.5×
- 358ShakopeeMinnesota 7.51.5×
- 358BridgeportConnecticut 7.51.5×
- 358San FranciscoCalifornia 7.51.5×
- 358Twin FallsIdaho 7.51.5×
- 358AltamontOregon 7.51.5×
- 358West Valley CityUtah 7.51.5×
- 369Fort LauderdaleFlorida 7.41.5×
- 369JacksonvilleFlorida 7.41.5×
- 369ElktonMaryland 7.41.5×
- 369ScaggsvilleMaryland 7.41.5×
- 369PascagoulaMississippi 7.41.5×
- 369SewellNew Jersey 7.41.5×
- 369HartfordConnecticut 7.41.5×
- 369LafayetteIndiana 7.41.5×
- 369TrentonNew Jersey 7.41.5×
- 369PainesvilleOhio 7.41.5×
- 369AltoonaPennsylvania 7.41.5×
- 369Weirton HeightsWest Virginia 7.41.5×
- 369IndioCalifornia 7.41.5×
- 369ButteMontana 7.41.5×
- 369EllensburgWashington 7.41.5×
- 384Fort SmithArkansas 7.31.5×
- 384TampaFlorida 7.31.5×
- 384ElizabethtownKentucky 7.31.5×
- 384University CityMissouri 7.31.5×
- 384LebanonOhio 7.31.5×
- 384East HamptonVirginia 7.31.5×
- 384DanburyConnecticut 7.31.5×
- 384WaterburyConnecticut 7.31.5×
- 384GahannaOhio 7.31.5×
- 384San LeandroCalifornia 7.31.5×
- 384Arden-ArcadeCalifornia 7.31.5×
- 384RandolphNew Jersey 7.31.5×
- 396PaducahKentucky 7.21.4×
- 396Oak RidgeFlorida 7.21.4×
- 396EdgewoodMaryland 7.21.4×
- 396PleasantvilleNew Jersey 7.21.4×
- 396South VinelandNew Jersey 7.21.4×
- 396AnkenyIowa 7.21.4×
- 396Saint CloudMinnesota 7.21.4×
- 396Saint MichaelMinnesota 7.21.4×
- 396BrookingsSouth Dakota 7.21.4×
- 396Casa GrandeArizona 7.21.4×
- 396SalinasCalifornia 7.21.4×
- 396RedmondOregon 7.21.4×
- 408Pompano BeachFlorida 7.11.4×
- 408ValricoFlorida 7.11.4×
- 408Lexington-FayetteKentucky 7.11.4×
- 408Atlantic CityNew Jersey 7.11.4×
- 408DyersburgTennessee 7.11.4×
- 408New HavenConnecticut 7.11.4×
- 408BloomingtonIllinois 7.11.4×
- 408Apple ValleyMinnesota 7.11.4×
- 408BerkeleyCalifornia 7.11.4×
- 408HobbsNew Mexico 7.11.4×
- 408MedfordOregon 7.11.4×
- 408Tri-CitiesWashington 7.11.4×
- 420Fruit CoveFlorida 7.01.4×
- 420Palm CityFlorida 7.01.4×
- 420St. PetersburgFlorida 7.01.4×
- 420NicholasvilleKentucky 7.01.4×
- 420Kansas CityMissouri 7.01.4×
- 420DurhamNorth Carolina 7.01.4×
- 420RoanokeVirginia 7.01.4×
- 420SalemVirginia 7.01.4×
- 420West FargoNorth Dakota 7.01.4×
- 420LincolnNebraska 7.01.4×
- 420New BrunswickNew Jersey 7.01.4×
- 420NipomoCalifornia 7.01.4×
- 420BozemanMontana 7.01.4×
- 433FairhopeAlabama 6.91.4×
- 433West PensacolaFlorida 6.91.4×
- 433SpringfieldMassachusetts 6.91.4×
- 433BayonneNew Jersey 6.91.4×
- 433RochesterNew York 6.91.4×
- 433RutlandVermont 6.91.4×
- 433PaysonArizona 6.91.4×
- 433Arroyo GrandeCalifornia 6.91.4×
- 433DavisCalifornia 6.91.4×
- 433RosevilleCalifornia 6.91.4×
- 433VallejoCalifornia 6.91.4×
- 433OremUtah 6.91.4×
- 445GainesvilleFlorida 6.81.4×
- 445Fort ThomasKentucky 6.81.4×
- 445HagerstownMaryland 6.81.4×
- 445ArnoldMissouri 6.81.4×
- 445BrocktonMassachusetts 6.81.4×
- 445YumaArizona 6.81.4×
- 445BrawleyCalifornia 6.81.4×
- 445El CentroCalifornia 6.81.4×
- 445LivermoreCalifornia 6.81.4×
- 445SacramentoCalifornia 6.81.4×
- 445GreeleyColorado 6.81.4×
- 445Salt Lake CityUtah 6.81.4×
- 445Columbia CityWashington 6.81.4×
- 458Daytona BeachFlorida 6.71.3×
- 458Deerfield BeachFlorida 6.71.3×
- 458Delray BeachFlorida 6.71.3×
- 458LeawoodKansas 6.71.3×
- 458White OakOhio 6.71.3×
- 458WatertownSouth Dakota 6.71.3×
- 458BanningCalifornia 6.71.3×
- 458ThorntonColorado 6.71.3×
- 458RenoNevada 6.71.3×
- 458BendOregon 6.71.3×
- 458The DallesOregon 6.71.3×
- 458Oxon Hill-GlassmanorMaryland 6.71.3×
- 470HueytownAlabama 6.61.3×
- 470OrlandoFlorida 6.61.3×
- 470CookevilleTennessee 6.61.3×
- 470OmahaNebraska 6.61.3×
- 470TempeArizona 6.61.3×
- 470Rapid CitySouth Dakota 6.61.3×
- 470BountifulUtah 6.61.3×
- 470TacomaWashington 6.61.3×
- 470SheridanWyoming 6.61.3×
- 479LibertyMissouri 6.51.3×
- 479KingsportTennessee 6.51.3×
- 479FillmoreCalifornia 6.51.3×
- 479TucsonArizona 6.51.3×
- 479GaltCalifornia 6.51.3×
- 479LincolnCalifornia 6.51.3×
- 479Santa CruzCalifornia 6.51.3×
- 479Four CornersFlorida 6.51.3×
- 487DavieFlorida 6.41.3×
- 487New LondonConnecticut 6.41.3×
- 487BostonMassachusetts 6.41.3×
- 487GreenfieldMassachusetts 6.41.3×
- 487TemeculaCalifornia 6.41.3×
- 487AmarilloTexas 6.41.3×
- 487MoscowIdaho 6.41.3×
- 487HelenaMontana 6.41.3×
- 487AuburnWashington 6.41.3×
- 496Coconut CreekFlorida 6.31.3×
- 496Fort MyersFlorida 6.31.3×
- 496Safety HarborFlorida 6.31.3×
- 496McDonoughGeorgia 6.31.3×
- 496RaymoreMissouri 6.31.3×
- 496GlendaleArizona 6.31.3×
- 496OrcuttCalifornia 6.31.3×
- 496Las VegasNevada 6.31.3×
- 496LongmontColorado 6.31.3×
- 496Spanish ForkUtah 6.31.3×
- 496RentonWashington 6.31.3×
- 507Belle GladeFlorida 6.21.2×
- 507SarasotaFlorida 6.21.2×
- 507KeeneNew Hampshire 6.21.2×
- 507SyracuseNew York 6.21.2×
- 507Fort CollinsColorado 6.21.2×
- 507MissoulaMontana 6.21.2×
- 507TigardOregon 6.21.2×
- 507Brigham CityUtah 6.21.2×
- 515Lake MaryFlorida 6.11.2×
- 515WellingtonFlorida 6.11.2×
- 515LafayetteLouisiana 6.11.2×
- 515Fall RiverMassachusetts 6.11.2×
- 515MesaArizona 6.11.2×
- 515OxnardCalifornia 6.11.2×
- 515Redwood CityCalifornia 6.11.2×
- 515UkiahCalifornia 6.11.2×
- 515PocatelloIdaho 6.11.2×
- 515EugeneOregon 6.11.2×
- 515MagnaUtah 6.11.2×
- 515TooeleUtah 6.11.2×
- 515SeattleWashington 6.11.2×
- 515FairbanksAlaska 6.11.2×
- 529RockvilleMaryland 6.01.2×
- 529FraminghamMassachusetts 6.01.2×
- 529HaverhillMassachusetts 6.01.2×
- 529LowellMassachusetts 6.01.2×
- 529LynnMassachusetts 6.01.2×
- 529Middletonlow-cost sensorsWisconsin 6.01.2×
- 529AtascaderoCalifornia 6.01.2×
- 529BismarckNorth Dakota 6.01.2×
- 529Grants PassOregon 6.01.2×
- 529HerrimanUtah 6.01.2×
- 529PullmanWashington 6.01.2×
- 540Lexingtonlow-cost sensorsMassachusetts 5.91.2×
- 540WorcesterMassachusetts 5.91.2×
- 540AugustaMaine 5.91.2×
- 540BangorMaine 5.91.2×
- 540GilroyCalifornia 5.91.2×
- 540Arvadalow-cost sensorsColorado 5.91.2×
- 540HillsboroOregon 5.91.2×
- 540VancouverWashington 5.91.2×
- 548Palm BayFlorida 5.81.2×
- 548ProvidenceRhode Island 5.81.2×
- 548Santa RosaCalifornia 5.81.2×
- 548Thousand OaksCalifornia 5.81.2×
- 548DenverColorado 5.81.2×
- 548Rio RanchoNew Mexico 5.81.2×
- 548LubbockTexas 5.81.2×
- 548ReddingCalifornia 5.81.2×
- 548North OgdenUtah 5.81.2×
- 557PittsfieldMassachusetts 5.71.1×
- 557QuincyMassachusetts 5.71.1×
- 557LewistonMaine 5.71.1×
- 557PortsmouthNew Hampshire 5.71.1×
- 557ConcordCalifornia 5.71.1×
- 562East LakeFlorida 5.61.1×
- 562MilfordMassachusetts 5.61.1×
- 562North ChicopeeMassachusetts 5.61.1×
- 562La VistaNebraska 5.61.1×
- 562ChicoCalifornia 5.61.1×
- 562AlbuquerqueNew Mexico 5.61.1×
- 562AlbanyOregon 5.61.1×
- 562GreshamOregon 5.61.1×
- 562HighlandUtah 5.61.1×
- 562BellinghamWashington 5.61.1×
- 562Port AngelesWashington 5.61.1×
- 573ConwaySouth Carolina 5.51.1×
- 573BellevueNebraska 5.51.1×
- 573DerryNew Hampshire 5.51.1×
- 573Casas AdobesArizona 5.51.1×
- 573Cedar CityUtah 5.51.1×
- 573CanbyOregon 5.51.1×
- 573SalemOregon 5.51.1×
- 580Colorado SpringsColorado 5.41.1×
- 580Spanish SpringsNevada 5.41.1×
- 580WindsorColorado 5.41.1×
- 580Idaho FallsIdaho 5.41.1×
- 580Oregon CityOregon 5.41.1×
- 580Picnic Point-North LynnwoodWashington 5.41.1×
- 586NewburghNew York 5.31.1×
- 586UticaNew York 5.31.1×
- 586PawtucketRhode Island 5.31.1×
- 586TracyCalifornia 5.31.1×
- 586PuebloColorado 5.31.1×
- 586ParklandWashington 5.31.1×
- 592AshlandOregon 5.21.0×
- 593White PlainsNew York 5.11.0×
- 593LancasterCalifornia 5.11.0×
- 593San RafaelCalifornia 5.11.0×
- 596New CityNew York 5.01.0×
- 596ParadiseCalifornia 5.01.0×
- 596Las CrucesNew Mexico 5.01.0×
- 596WoodburnOregon 5.01.0×
- 596ShorelineWashington 5.01.0×
- 601Grand IslandNebraska 4.91.0×
- 601Cañon CityColorado 4.91.0×
- 601BoulderColorado 4.91.0×
- 601RoseburgOregon 4.91.0×
- 601BremertonWashington 4.91.0×
- 601CentraliaWashington 4.91.0×
- 607FolsomCalifornia 4.81.0×
- 607RidgecrestCalifornia 4.81.0×
- 607TruckeeCalifornia 4.81.0×
- 607VacavilleCalifornia 4.81.0×
- 607Ken CarylColorado 4.81.0×
- 607Apache JunctionArizona 4.81.0×
- 607BeavertonOregon 4.81.0×
- 607PortlandOregon 4.81.0×
- 607KentWashington 4.81.0×
- 616HollisterCalifornia 4.70.9×
- 616LaceyWashington 4.70.9×
- 618Sioux FallsSouth Dakota 4.60.9×
- 618MaranaArizona 4.60.9×
- 618Carson CityNevada 4.60.9×
- 618Spring ValleyNevada 4.60.9×
- 618BurienWashington 4.60.9×
- 618Salmon CreekWashington 4.60.9×
- 624HurricaneUtah 4.50.9×
- 624MilwaukieOregon 4.50.9×
- 624LongviewWashington 4.50.9×
- 627LaconiaNew Hampshire 4.40.9×
- 627AberdeenSouth Dakota 4.40.9×
- 627HendersonNevada 4.40.9×
- 630Encinitaslow-cost sensorsCalifornia 4.30.9×
- 630Palo Altolow-cost sensorsCalifornia 4.30.9×
- 630EnterpriseNevada 4.30.9×
- 630Coos BayOregon 4.30.9×
- 630GilletteWyoming 4.30.9×
- 635DallasOregon 4.20.8×
- 635HonoluluHawaii 4.20.8×
- 637Goletalow-cost sensorsCalifornia 4.10.8×
- 638KīheiHawaii 4.00.8×
- 638AnchorageAlaska 4.00.8×
- 640MesquiteNevada 3.90.8×
- 640CorvallisOregon 3.90.8×
- 640McMinnvilleOregon 3.90.8×
- 640KahuluiHawaii 3.90.8×
- 640Summerlin SouthNevada 3.90.8×
- 645Boulder CityNevada 3.80.8×
- 646CoventryRhode Island 3.70.7×
- 646Forest GroveOregon 3.70.7×
- 646AberdeenWashington 3.70.7×
- 649BellevueWashington 3.60.7×
- 649Kirklandlow-cost sensorsWashington 3.60.7×
- 649HiloHawaii 3.60.7×
- 649Union Hill-Novelty Hilllow-cost sensorsWashington 3.60.7×
- 653Rock SpringsWyoming 3.50.7×
- 654LompocCalifornia 3.40.7×
- 655LaramieWyoming 3.30.7×
- 656Green ValleyArizona 3.20.6×
- 656CheyenneWyoming 3.20.6×
- 658CasperWyoming 3.10.6×
- 659Bothelllow-cost sensorsWashington 3.00.6×
- 660Mount VernonWashington 2.90.6×
- 661Loganlow-cost sensorsUtah 2.80.6×
- 662AnacortesWashington 2.70.5×
- 663Parkerlow-cost sensorsColorado 2.00.4×
- 664Oro Valleylow-cost sensorsArizona 0.20.0×
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+