SmogRank / Countries / United States / September 2023
Most polluted cities in United States, September 2023
593 cities in United States ranked by their average PM2.5 over the 30 days. Worst: Bismarck at 23.2 µg/m³, #44 of 1,830 cities in the world. Cleanest: Apache Junction at 2.0. A city needs measurements on 70% of the days to be ranked.
- 1BismarckNorth Dakota 23.2
- 2BirminghamAlabama 20.0
- 3Little RockArkansas 16.8
- 4West FargoNorth Dakota 16.5
- 5FontanaCalifornia 16.1
- 5IndioCalifornia 16.1
- 7Great FallsMontana 15.6
- 8DerbyKansas 15.4
- 8TopekaKansas 15.4
- 10WichitaKansas 15.0
- 10CalexicoCalifornia 15.0
- 12HernandoMississippi 14.7
- 13RichmondCalifornia 14.6
- 14Kansas CityKansas 14.5
- 14Ponca CityOklahoma 14.5
- 16RiversideCalifornia 14.3
- 16Rapid CitySouth Dakota 14.3
- 18Grand IslandNebraska 14.2
- 19HueytownAlabama 14.1
- 19ComptonCalifornia 14.1
- 21OlatheKansas 14.0
- 22ShreveportLouisiana 13.7
- 22JenksOklahoma 13.7
- 24Jurupa ValleyCalifornia 13.6
- 25OmahaNebraska 13.5
- 26Saint JosephMissouri 13.4
- 26AnaheimCalifornia 13.4
- 28BillingsMontana 13.3
- 29WatertownSouth Dakota 13.2
- 30East Saint LouisIllinois 13.1
- 31BartlettTennessee 12.9
- 31Los AngelesCalifornia 12.9
- 31SalinasCalifornia 12.9
- 34TulsaOklahoma 12.8
- 35Long BeachCalifornia 12.7
- 35La Crescenta-Montroselow-cost sensorsCalifornia 12.7
- 37BakersfieldCalifornia 12.6
- 37GlendoraCalifornia 12.6
- 39TexarkanaTexas 12.5
- 39MedfordOregon 12.5
- 39RedmondOregon 12.5
- 42AberdeenSouth Dakota 12.4
- 42Redwood CityCalifornia 12.4
- 44BellevueNebraska 12.2
- 44MaderaCalifornia 12.2
- 46AnkenyIowa 12.1
- 47DallasTexas 12.0
- 47FresnoCalifornia 12.0
- 47PortervilleCalifornia 12.0
- 50SpringdaleArkansas 11.9
- 50LibertyMissouri 11.9
- 50BrookingsSouth Dakota 11.9
- 50TurlockCalifornia 11.9
- 54Arroyo GrandeCalifornia 11.8
- 54Chula VistaCalifornia 11.8
- 54HanfordCalifornia 11.8
- 57West MemphisArkansas 11.7
- 57OceansideCalifornia 11.7
- 57Santa ClaritaCalifornia 11.7
- 57VisaliaCalifornia 11.7
- 61TrussvilleAlabama 11.6
- 61ShakopeeMinnesota 11.6
- 61Agouralow-cost sensorsCalifornia 11.6
- 64HattiesburgMississippi 11.5
- 64EdmondOklahoma 11.5
- 64Lexingtonlow-cost sensorsMassachusetts 11.5
- 64BurnsvilleMinnesota 11.5
- 64Saint CloudMinnesota 11.5
- 64Carsonlow-cost sensorsCalifornia 11.5
- 64Torrancelow-cost sensorsCalifornia 11.5
- 71MooreOklahoma 11.4
- 71Iowa CityIowa 11.4
- 71San DiegoCalifornia 11.4
- 74LompocCalifornia 11.3
- 74Santa BarbaraCalifornia 11.3
- 76BurbankCalifornia 11.2
- 76Hawthornelow-cost sensorsCalifornia 11.2
- 76Grants PassOregon 11.2
- 79Kansas CityMissouri 11.1
- 79Inglewoodlow-cost sensorsCalifornia 11.1
- 79OaklandCalifornia 11.1
- 79Santa Monicalow-cost sensorsCalifornia 11.1
- 79AshlandOregon 11.1
- 79Candler-McAfeeGeorgia 11.1
- 85St. LouisMissouri 11.0
- 85BensalemPennsylvania 11.0
- 85San JoseCalifornia 11.0
- 85RoseburgOregon 11.0
- 89SpringfieldIllinois 10.9
- 89Saint MichaelMinnesota 10.9
- 89BrawleyCalifornia 10.9
- 89ModestoCalifornia 10.9
- 93GadsdenAlabama 10.8
- 93Baton RougeLouisiana 10.8
- 93Oklahoma CityOklahoma 10.8
- 93East RidgeTennessee 10.8
- 93NipomoCalifornia 10.8
- 98ColumbusGeorgia 10.7
- 98Granite CityIllinois 10.7
- 98Port ArthurTexas 10.7
- 98PortlandMaine 10.7
- 98El CajonCalifornia 10.7
- 98Lomitalow-cost sensorsCalifornia 10.7
- 98StocktonCalifornia 10.7
- 105MontgomeryAlabama 10.6
- 105JacksonMississippi 10.6
- 105HoustonTexas 10.6
- 105BanningCalifornia 10.6
- 105ClovisCalifornia 10.6
- 105CorcoranCalifornia 10.6
- 105PowayCalifornia 10.6
- 112IndianapolisIndiana 10.5
- 112Fort WorthTexas 10.5
- 112DavenportIowa 10.5
- 112DuluthMinnesota 10.5
- 112MinneapolisMinnesota 10.5
- 112RochesterMinnesota 10.5
- 112Thousand OaksCalifornia 10.5
- 119AtlantaGeorgia 10.4
- 119ChattanoogaTennessee 10.4
- 119Des MoinesIowa 10.4
- 119Franklin ParkIllinois 10.4
- 119Apple ValleyMinnesota 10.4
- 119Sioux FallsSouth Dakota 10.4
- 125PasadenaTexas 10.3
- 125ClintonIowa 10.3
- 125AugustaMaine 10.3
- 125GilletteWyoming 10.3
- 129HuntsvilleAlabama 10.2
- 129Ferry PassFlorida 10.2
- 129EvansvilleIndiana 10.2
- 129SuperiorWisconsin 10.2
- 133AlbanyGeorgia 10.1
- 133GainesvilleGeorgia 10.1
- 133BaytownTexas 10.1
- 133Calumet CityIllinois 10.1
- 133DetroitMichigan 10.1
- 138MaconGeorgia 10.0
- 138McAlesterOklahoma 10.0
- 138Missouri CityTexas 10.0
- 138DavisCalifornia 10.0
- 142SulphurLouisiana 9.9
- 142ConroeTexas 9.9
- 142NapervilleIllinois 9.9
- 142Saint PaulMinnesota 9.9
- 142MantecaCalifornia 9.9
- 142Simi ValleyCalifornia 9.9
- 142MidwayFlorida 9.9
- 149DecaturIllinois 9.8
- 149Valley StationKentucky 9.8
- 149SpringfieldMissouri 9.8
- 149University CityMissouri 9.8
- 149WaterlooIowa 9.8
- 149Grand RapidsMichigan 9.8
- 149ElizabethNew Jersey 9.8
- 156LouisvilleKentucky 9.7
- 156NorthbrookIllinois 9.7
- 156DearbornMichigan 9.7
- 156El CentroCalifornia 9.7
- 156Yuba CityCalifornia 9.7
- 156BendOregon 9.7
- 162PascagoulaMississippi 9.6
- 162FlorenceSouth Carolina 9.6
- 162SaginawTexas 9.6
- 162MolineIllinois 9.6
- 162RockfordIllinois 9.6
- 167McDonoughGeorgia 9.5
- 167JeffersonvilleIndiana 9.5
- 167MuscatineIowa 9.5
- 167BloomingtonIllinois 9.5
- 167Des PlainesIllinois 9.5
- 167HelenaMontana 9.5
- 173PaducahKentucky 9.4
- 173ArnoldMissouri 9.4
- 173JacksonTennessee 9.4
- 173CorsicanaTexas 9.4
- 173DentonTexas 9.4
- 173YumaArizona 9.4
- 173FolsomCalifornia 9.4
- 173UkiahCalifornia 9.4
- 181Fort SmithArkansas 9.3
- 181ValdostaGeorgia 9.3
- 181AustinTexas 9.3
- 181East ChicagoIndiana 9.3
- 181KalamazooMichigan 9.3
- 181LivermoreCalifornia 9.3
- 187OcalaFlorida 9.2
- 187AugustaGeorgia 9.2
- 187Terre HauteIndiana 9.2
- 187ColumbusOhio 9.2
- 187AdaOklahoma 9.2
- 187SpartanburgSouth Carolina 9.2
- 187PeoriaIllinois 9.2
- 187BlaineMinnesota 9.2
- 187ProvidenceRhode Island 9.2
- 187San LeandroCalifornia 9.2
- 187VictorvilleCalifornia 9.2
- 198Warner RobinsGeorgia 9.1
- 198RaymoreMissouri 9.1
- 198KnoxvilleTennessee 9.1
- 198LincolnCalifornia 9.1
- 198San Luis ObispoCalifornia 9.1
- 203Lincoln ParkMichigan 9.0
- 203MercedCalifornia 9.0
- 205JeffersontownKentucky 8.9
- 205Winston-SalemNorth Carolina 8.9
- 205GalvestonTexas 8.9
- 205JolietIllinois 8.9
- 205New BrunswickNew Jersey 8.9
- 205AlbanyNew York 8.9
- 205HollisterCalifornia 8.9
- 212Saint MatthewsKentucky 8.8
- 212ChicagoIllinois 8.8
- 212JenisonMichigan 8.8
- 212BurlingtonVermont 8.8
- 212WoodlandCalifornia 8.8
- 217LemayMissouri 8.7
- 217GulfportMississippi 8.7
- 217DyersburgTennessee 8.7
- 217HartfordConnecticut 8.7
- 217ClevelandOhio 8.7
- 217CoventryRhode Island 8.7
- 217RutlandVermont 8.7
- 217RosevilleCalifornia 8.7
- 217Santa CruzCalifornia 8.7
- 226LawrencevilleGeorgia 8.6
- 226SavannahGeorgia 8.6
- 226LafayetteLouisiana 8.6
- 226RaleighNorth Carolina 8.6
- 226South BendIndiana 8.6
- 226KeeneNew Hampshire 8.6
- 226TrentonNew Jersey 8.6
- 226El PasoTexas 8.6
- 226AltamontOregon 8.6
- 235MiddletownOhio 8.5
- 235PhiladelphiaPennsylvania 8.5
- 235CookevilleTennessee 8.5
- 235BostonMassachusetts 8.5
- 235Lake ElsinoreCalifornia 8.5
- 235San RafaelCalifornia 8.5
- 235SheridanWyoming 8.5
- 242NorwoodOhio 8.4
- 242LawtonOklahoma 8.4
- 242SpringfieldMassachusetts 8.4
- 242CheektowagaNew York 8.4
- 242GaltCalifornia 8.4
- 247TallahasseeFlorida 8.3
- 247JasperIndiana 8.3
- 247FayettevilleNorth Carolina 8.3
- 247GreensboroNorth Carolina 8.3
- 247ConwaySouth Carolina 8.3
- 247San AntonioTexas 8.3
- 247GreenfieldMassachusetts 8.3
- 247LewistonMaine 8.3
- 247RedfordMichigan 8.3
- 247YpsilantiMichigan 8.3
- 247CantonOhio 8.3
- 247West MifflinPennsylvania 8.3
- 247ParadiseCalifornia 8.3
- 260Fort LauderdaleFlorida 8.2
- 260ElizabethtownKentucky 8.2
- 260New OrleansLouisiana 8.2
- 260La PorteTexas 8.2
- 260Mission BendTexas 8.2
- 260CaryIllinois 8.2
- 260WarrenOhio 8.2
- 267BrunswickGeorgia 8.1
- 267New AlbanyIndiana 8.1
- 267MorrisvilleNorth Carolina 8.1
- 267CincinnatiOhio 8.1
- 267SpringfieldOhio 8.1
- 267GreenvilleSouth Carolina 8.1
- 267BrocktonMassachusetts 8.1
- 267QuincyMassachusetts 8.1
- 267Eau ClaireWisconsin 8.1
- 267WaukeshaWisconsin 8.1
- 267ConcordCalifornia 8.1
- 267SacramentoCalifornia 8.1
- 279PrichardAlabama 8.0
- 279East LakeFlorida 8.0
- 279North CharlestonSouth Carolina 8.0
- 279Oak LawnIllinois 8.0
- 279HammondIndiana 8.0
- 279PortageIndiana 8.0
- 279Port HuronMichigan 8.0
- 279TaylorMichigan 8.0
- 279LindenNew Jersey 8.0
- 279WestervilleOhio 8.0
- 279MilwaukeeWisconsin 8.0
- 279FillmoreCalifornia 8.0
- 291BearDelaware 7.9
- 291Ponte Vedra BeachFlorida 7.9
- 291FishersIndiana 7.9
- 291ClemmonsNorth Carolina 7.9
- 291GreenvilleNorth Carolina 7.9
- 291ClarksvilleTennessee 7.9
- 291New LondonConnecticut 7.9
- 291GaryIndiana 7.9
- 291KenmoreNew York 7.9
- 291AppletonWisconsin 7.9
- 291ChicoCalifornia 7.9
- 302AthensGeorgia 7.8
- 302DaytonOhio 7.8
- 302BeltonTexas 7.8
- 302Live OakTexas 7.8
- 302WaterburyConnecticut 7.8
- 302LowellMassachusetts 7.8
- 302Green BayWisconsin 7.8
- 309NewarkDelaware 7.7
- 309Atlantic CityNew Jersey 7.7
- 309Fall RiverMassachusetts 7.7
- 309BangorMaine 7.7
- 309PortsmouthNew Hampshire 7.7
- 309New York CityNew York 7.7
- 309MadisonWisconsin 7.7
- 309OrcuttCalifornia 7.7
- 309Santa RosaCalifornia 7.7
- 309RentonWashington 7.7
- 319FairhopeAlabama 7.6
- 319Fort ThomasKentucky 7.6
- 319Lexington-FayetteKentucky 7.6
- 319CharlotteNorth Carolina 7.6
- 319ClaytonNorth Carolina 7.6
- 319North ChicopeeMassachusetts 7.6
- 319EwingNew Jersey 7.6
- 319AkronOhio 7.6
- 319GreeleyColorado 7.6
- 319EugeneOregon 7.6
- 329ColumbusIndiana 7.5
- 329Saint AndrewsSouth Carolina 7.5
- 329ColumbiaTennessee 7.5
- 329College StationTexas 7.5
- 329HarrisburgPennsylvania 7.5
- 329SeattleWashington 7.5
- 335WashingtonDistrict of Columbia 7.4
- 335AshlandKentucky 7.4
- 335YorkPennsylvania 7.4
- 335MaryvilleTennessee 7.4
- 335PittsfieldMassachusetts 7.4
- 335LaconiaNew Hampshire 7.4
- 341DoverDelaware 7.3
- 341HickoryNorth Carolina 7.3
- 341White OakOhio 7.3
- 341ChesterPennsylvania 7.3
- 341DanburyConnecticut 7.3
- 341WorcesterMassachusetts 7.3
- 341DerryNew Hampshire 7.3
- 341YoungstownOhio 7.3
- 341McKeesportPennsylvania 7.3
- 341ScrantonPennsylvania 7.3
- 341La CrosseWisconsin 7.3
- 341South MilwaukeeWisconsin 7.3
- 341NogalesArizona 7.3
- 341AtascaderoCalifornia 7.3
- 341Columbia CityWashington 7.3
- 356Fruit CoveFlorida 7.2
- 356South LaurelMaryland 7.2
- 356LaredoTexas 7.2
- 356ChesapeakeVirginia 7.2
- 356East HamptonVirginia 7.2
- 356New HavenConnecticut 7.2
- 356AndersonIndiana 7.2
- 356LansingMichigan 7.2
- 356LancasterPennsylvania 7.2
- 356GilroyCalifornia 7.2
- 356ThorntonColorado 7.2
- 367ElktonMaryland 7.1
- 367LexingtonNorth Carolina 7.1
- 367PennsaukenNew Jersey 7.1
- 367South VinelandNew Jersey 7.1
- 367HendersonvilleTennessee 7.1
- 367HaverhillMassachusetts 7.1
- 367LynnMassachusetts 7.1
- 367BuffaloNew York 7.1
- 367UticaNew York 7.1
- 367DublinOhio 7.1
- 367WilkinsburgPennsylvania 7.1
- 367BridgeportConnecticut 7.1
- 367OdessaTexas 7.1
- 380JacksonvilleFlorida 7.0
- 380Roanoke RapidsNorth Carolina 7.0
- 380LebanonOhio 7.0
- 380ElkhartIndiana 7.0
- 380Jersey CityNew Jersey 7.0
- 380PainesvilleOhio 7.0
- 380DenverColorado 7.0
- 380AmarilloTexas 7.0
- 380ReddingCalifornia 7.0
- 380MillcreekUtah 7.0
- 390WilmingtonDelaware 6.9
- 390MiamiFlorida 6.9
- 390TampaFlorida 6.9
- 390PortsmouthOhio 6.9
- 390Corpus ChristiTexas 6.9
- 390RichmondVirginia 6.9
- 390SteubenvilleOhio 6.9
- 390LebanonPennsylvania 6.9
- 390RexburgIdaho 6.9
- 399VeniceFlorida 6.8
- 399Fort LeeNew Jersey 6.8
- 399RochesterNew York 6.8
- 399BethlehemPennsylvania 6.8
- 399PittsburghPennsylvania 6.8
- 404Palm CityFlorida 6.7
- 404ZionIllinois 6.7
- 404TracyCalifornia 6.7
- 404SocorroTexas 6.7
- 404LewistonIdaho 6.7
- 409Daytona BeachFlorida 6.6
- 409HomesteadFlorida 6.6
- 409EdinburgTexas 6.6
- 409MedinaOhio 6.6
- 409Casa GrandeArizona 6.6
- 414Bonita SpringsFlorida 6.5
- 414BloomingtonIndiana 6.5
- 414Rose HillVirginia 6.5
- 414PatersonNew Jersey 6.5
- 414EriePennsylvania 6.5
- 419MasonOhio 6.4
- 419SpringfieldVirginia 6.4
- 419HobbsNew Mexico 6.4
- 419Carson CityNevada 6.4
- 419SunnysideWashington 6.4
- 424DecaturAlabama 6.3
- 424GainesvilleFlorida 6.3
- 424CharlestonWest Virginia 6.3
- 424Bay CityMichigan 6.3
- 424HempsteadNew York 6.3
- 424NewburghNew York 6.3
- 424AltoonaPennsylvania 6.3
- 424NorristownPennsylvania 6.3
- 424WheelingWest Virginia 6.3
- 424TruckeeCalifornia 6.3
- 424VacavilleCalifornia 6.3
- 424Las VegasNevada 6.3
- 424TigardOregon 6.3
- 437LakelandFlorida 6.2
- 437Palm BayFlorida 6.2
- 437PleasantvilleNew Jersey 6.2
- 437KingsportTennessee 6.2
- 437CharlottesvilleVirginia 6.2
- 437LafayetteIndiana 6.2
- 437SyracuseNew York 6.2
- 437Shaker HeightsOhio 6.2
- 437AllentownPennsylvania 6.2
- 437Fort CollinsColorado 6.2
- 437HermistonOregon 6.2
- 437Moses LakeWashington 6.2
- 437Arden-ArcadeCalifornia 6.2
- 450RoanokeVirginia 6.1
- 450SpokaneWashington 6.1
- 452Delray BeachFlorida 6.0
- 452Hunt ValleyMaryland 6.0
- 452ReadingPennsylvania 6.0
- 452TempeArizona 6.0
- 452Coeur d'AleneIdaho 6.0
- 452ParklandWashington 6.0
- 452Port AngelesWashington 6.0
- 452ShorelineWashington 6.0
- 452TacomaWashington 6.0
- 461Winter ParkFlorida 5.9
- 461DurhamNorth Carolina 5.9
- 461HopewellVirginia 5.9
- 461KokomoIndiana 5.9
- 461CarlislePennsylvania 5.9
- 461South Lake TahoeCalifornia 5.9
- 461Colorado SpringsColorado 5.9
- 461Eagle PassTexas 5.9
- 461LongmontColorado 5.9
- 461MoscowIdaho 5.9
- 461Spanish ForkUtah 5.9
- 461West JordanUtah 5.9
- 461AuburnWashington 5.9
- 461YakimaWashington 5.9
- 475Belle GladeFlorida 5.8
- 475Deerfield BeachFlorida 5.8
- 475ValricoFlorida 5.8
- 475WellingtonFlorida 5.8
- 475State CollegePennsylvania 5.8
- 475PhoenixArizona 5.8
- 475LancasterCalifornia 5.8
- 475LubbockTexas 5.8
- 483Coconut CreekFlorida 5.7
- 483Lake MaryFlorida 5.7
- 483EdgewoodMaryland 5.7
- 483BellinghamWashington 5.7
- 487DavieFlorida 5.6
- 487AshevilleNorth Carolina 5.6
- 487HighlandUtah 5.6
- 487Salmon CreekWashington 5.6
- 491RockvilleMaryland 5.5
- 491BayonneNew Jersey 5.5
- 491White PlainsNew York 5.5
- 491Weirton HeightsWest Virginia 5.5
- 491Sunland ParkNew Mexico 5.5
- 491RenoNevada 5.5
- 491NampaIdaho 5.5
- 498MesaArizona 5.4
- 498TucsonArizona 5.4
- 498BountifulUtah 5.4
- 498MagnaUtah 5.4
- 498Salt Lake CityUtah 5.4
- 498PullmanWashington 5.4
- 498Spokane ValleyWashington 5.4
- 505ScaggsvilleMaryland 5.3
- 505HermitagePennsylvania 5.3
- 505WenatcheeWashington 5.3
- 508WestonFlorida 5.2
- 508FlintMichigan 5.2
- 508GahannaOhio 5.2
- 508Walla WallaWashington 5.2
- 512New CityNew York 5.1
- 512Rio RanchoNew Mexico 5.1
- 512CanbyOregon 5.1
- 512SalemOregon 5.1
- 512LongviewWashington 5.1
- 512CheyenneWyoming 5.1
- 518Safety HarborFlorida 5.0
- 518BaltimoreMaryland 5.0
- 518ToledoOhio 5.0
- 518MeridianIdaho 5.0
- 518AlbanyOregon 5.0
- 518EllensburgWashington 5.0
- 524Ken CarylColorado 4.9
- 524Cedar CityUtah 4.9
- 524CondaIdaho 4.9
- 524OremUtah 4.9
- 524CentraliaWashington 4.9
- 529MaranaArizona 4.8
- 529BoiseIdaho 4.8
- 529HerrimanUtah 4.8
- 529Mount VernonWashington 4.8
- 533GlendaleArizona 4.7
- 533AlbuquerqueNew Mexico 4.7
- 533Spanish SpringsNevada 4.7
- 533GreshamOregon 4.7
- 533PortlandOregon 4.7
- 533TooeleUtah 4.7
- 533BremertonWashington 4.7
- 540BeavertonOregon 4.6
- 540BellevueWashington 4.6
- 542LimaOhio 4.5
- 542Spring ValleyNevada 4.5
- 542ButteMontana 4.5
- 542Forest GroveOregon 4.5
- 542HillsboroOregon 4.5
- 542PendletonOregon 4.5
- 542The DallesOregon 4.5
- 542AberdeenWashington 4.5
- 542Makakilo / Kapolei / Honokai HaleHawaii 4.5
- 551CasperWyoming 4.4
- 552BozemanMontana 4.3
- 552MissoulaMontana 4.3
- 552VancouverWashington 4.3
- 552AnchorageAlaska 4.3
- 556HendersonNevada 4.2
- 556Idaho FallsIdaho 4.2
- 556LaceyWashington 4.2
- 556Summerlin SouthNevada 4.2
- 560HagerstownMaryland 4.1
- 560Las CrucesNew Mexico 4.1
- 560EnterpriseNevada 4.1
- 560WoodburnOregon 4.1
- 560North OgdenUtah 4.1
- 560Tri-CitiesWashington 4.1
- 566Casas AdobesArizona 4.0
- 566AnacortesWashington 4.0
- 568Coos BayOregon 3.9
- 568Rock SpringsWyoming 3.9
- 570Twin FallsIdaho 3.8
- 570MilwaukieOregon 3.8
- 570IssaquahWashington 3.8
- 570LaramieWyoming 3.8
- 574HurricaneUtah 3.7
- 574HonoluluHawaii 3.7
- 576Grand JunctionColorado 3.6
- 576CorvallisOregon 3.6
- 576McMinnvilleOregon 3.6
- 576KahuluiHawaii 3.6
- 576HiloHawaii 3.6
- 581MesquiteNevada 3.5
- 582Green ValleyArizona 3.3
- 582Boulder CityNevada 3.3
- 582DallasOregon 3.3
- 582BadgerAlaska 3.3
- 586PocatelloIdaho 3.2
- 586Oak HarborWashington 3.2
- 588PascoWashington 3.1
- 588KīheiHawaii 3.1
- 588FairbanksAlaska 3.1
- 591MarysvilleWashington 3.0
- 592OrchardsWashington 2.8
- 593Apache JunctionArizona 2.0
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+
All cities in the world, September 2023 · United States now
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SmogRank, most polluted cities in United States, PM2.5, September 2023, smogrank.com/us/history/2023-09 (accessed 2 Oct 2026).
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