SmogRank / World / United States / September 2025
Most polluted cities in United States, September 2025
675 cities in United States ranked by their average PM2.5 over the 30 days. Worst: Calexico at 178.8 µg/m³, #1 of 2,711 cities in the world. Cleanest: Green Valley at 2.1. A city needs measurements on 70% of the days to be ranked.
← Calexico 178.8
- 1CalexicoCalifornia 229
- 2WenatcheeWashington 50
- 3YakimaWashington 27
- 4Moses LakeWashington 26
- 5Grants PassOregon 25
- 6Coeur d'AleneIdaho 25
- 7SpokaneWashington 24
- 8Spokane ValleyWashington 23
- 9SunnysideWashington 22
- 10LewistonIdaho 21
- 11MoscowIdaho 21
- 12Great FallsMontana 20
- 13Columbialow-cost sensorsMissouri 20
- 13BakersfieldCalifornia 20
- 15HoustonTexas 20
- 16EllensburgWashington 20
- 17MankatoMinnesota 20
- 18Wake Forestlow-cost sensorsNorth Carolina 19
- 19MiddletownOhio 19
- 20West MemphisArkansas 19
- 20HermistonOregon 19
- 20Tri-CitiesWashington 19
- 23PullmanWashington 18
- 24MaconGeorgia 18
- 25IndianapolisIndiana 18
- 25HernandoMississippi 18
- 25Oconomowoclow-cost sensorsWisconsin 18
- 28NorwoodOhio 18
- 28ConroeTexas 18
- 30BartlettTennessee 17
- 31RiversideCalifornia 17
- 31MedfordOregon 17
- 33OwensboroKentucky 17
- 33CincinnatiOhio 17
- 33ColumbusOhio 17
- 36JacksonMississippi 17
- 36PortervilleCalifornia 17
- 38HattiesburgMississippi 17
- 38WyomingMichigan 17
- 40PortsmouthOhio 17
- 40PasadenaTexas 17
- 42MooreOklahoma 17
- 42BrookfieldIllinois 17
- 44Baton RougeLouisiana 16
- 44GaryIndiana 16
- 46BirminghamAlabama 16
- 46JeffersonvilleIndiana 16
- 46Saint JosephMissouri 16
- 49TulsaOklahoma 16
- 49DentonTexas 16
- 49Fort DodgeIowa 16
- 49OregonOhio 16
- 49CorcoranCalifornia 16
- 49Walla WallaWashington 16
- 55GadsdenAlabama 16
- 55BridgeviewIllinois 16
- 55PerrysburgOhio 16
- 58WichitaKansas 16
- 58St. LouisMissouri 16
- 58GlendoraCalifornia 16
- 61AugustaGeorgia 16
- 61LafayetteLouisiana 16
- 63TallahasseeFlorida 16
- 63BaytownTexas 16
- 63Franklin ParkIllinois 16
- 63LafayetteIndiana 16
- 63AshlandOregon 16
- 68Granite CityIllinois 15
- 68Terre HauteIndiana 15
- 68TopekaKansas 15
- 68Hawthornelow-cost sensorsCalifornia 15
- 72MontgomeryAlabama 15
- 72East Saint LouisIllinois 15
- 72ChicagoIllinois 15
- 72ClevelandOhio 15
- 72VisaliaCalifornia 15
- 72BillingsMontana 15
- 78Little RockArkansas 15
- 78ValdostaGeorgia 15
- 78LexingtonNorth Carolina 15
- 78YorkPennsylvania 15
- 78Elmwood ParkIllinois 15
- 78Carsonlow-cost sensorsCalifornia 15
- 84Kansas CityKansas 15
- 84McAlesterOklahoma 15
- 86HuntsvilleAlabama 15
- 86SpringdaleArkansas 15
- 86AtlantaGeorgia 15
- 86Warner RobinsGeorgia 15
- 86EvansvilleIndiana 15
- 86LouisvilleKentucky 15
- 86Fort WorthTexas 15
- 86Des MoinesIowa 15
- 86KalamazooMichigan 15
- 86NampaIdaho 15
- 86HelenaMontana 15
- 97Upper AltonIllinois 15
- 97Oklahoma CityOklahoma 15
- 97Jurupa ValleyCalifornia 15
- 97MissoulaMontana 15
- 97PendletonOregon 15
- 102PaducahKentucky 15
- 102SteubenvilleOhio 15
- 102WestervilleOhio 15
- 102HanfordCalifornia 15
- 106OlatheKansas 14
- 106Mission BendTexas 14
- 106ElginIllinois 14
- 106BerkeleyCalifornia 14
- 110SulphurLouisiana 14
- 110Missouri CityTexas 14
- 110Calumet CityIllinois 14
- 110DoltonIllinois 14
- 110PeoriaIllinois 14
- 110Fort WayneIndiana 14
- 116DaytonOhio 14
- 116East RidgeTennessee 14
- 116JacksonTennessee 14
- 116SaginawTexas 14
- 116Cedar RapidsIowa 14
- 116ClintonIowa 14
- 116MolineIllinois 14
- 116ElkhartIndiana 14
- 116Michigan CityIndiana 14
- 116CantonOhio 14
- 116Inglewoodlow-cost sensorsCalifornia 14
- 116Santa Monicalow-cost sensorsCalifornia 14
- 128JenksOklahoma 14
- 128ChattanoogaTennessee 14
- 128Des PlainesIllinois 14
- 128HammondIndiana 14
- 128FontanaCalifornia 14
- 128Long BeachCalifornia 14
- 128MaderaCalifornia 14
- 128ButteMontana 14
- 136DecaturIllinois 14
- 136Valley StationKentucky 14
- 136KennerLouisiana 14
- 136DearbornMichigan 14
- 136DetroitMichigan 14
- 136West MifflinPennsylvania 14
- 136Torrancelow-cost sensorsCalifornia 14
- 136BozemanMontana 14
- 136Columbia CityWashington 14
- 145New AlbanyIndiana 14
- 145Ponca CityOklahoma 14
- 145NashvilleTennessee 14
- 145Iowa CityIowa 14
- 145Ann Arborlow-cost sensorsMichigan 14
- 145WarrenOhio 14
- 145Lomitalow-cost sensorsCalifornia 14
- 152PrichardAlabama 14
- 152Ferry PassFlorida 14
- 152AshlandKentucky 14
- 152RockfordIllinois 14
- 152FresnoCalifornia 14
- 157SpringfieldIllinois 13
- 157PascagoulaMississippi 13
- 157CorsicanaTexas 13
- 157NapervilleIllinois 13
- 157South BendIndiana 13
- 157Los AngelesCalifornia 13
- 157AuburnWashington 13
- 157MidwayFlorida 13
- 165Camdenlow-cost sensorsNew Jersey 13
- 165PortageIndiana 13
- 165Inglewood-Finn Hilllow-cost sensorsWashington 13
- 168JeffersontownKentucky 13
- 168SpringfieldMissouri 13
- 168GulfportMississippi 13
- 168SpringfieldOhio 13
- 168GreenvilleSouth Carolina 13
- 168SpartanburgSouth Carolina 13
- 168AustinTexas 13
- 168La PorteTexas 13
- 168Port ArthurTexas 13
- 168JolietIllinois 13
- 168WoodlandCalifornia 13
- 168Candler-McAfeeGeorgia 13
- 180DerbyKansas 13
- 180Saint MatthewsKentucky 13
- 180ArnoldMissouri 13
- 180CharlotteNorth Carolina 13
- 180EdmondOklahoma 13
- 180HuntingtonWest Virginia 13
- 180AuroraIllinois 13
- 180MinneapolisMinnesota 13
- 180MilwaukeeWisconsin 13
- 180The DallesOregon 13
- 190HueytownAlabama 13
- 190LawtonOklahoma 13
- 190DyersburgTennessee 13
- 190AnkenyIowa 13
- 190Oak LawnIllinois 13
- 190East ChicagoIndiana 13
- 190Lincoln ParkMichigan 13
- 190Abingtonlow-cost sensorsPennsylvania 13
- 190OceansideCalifornia 13
- 199AthensGeorgia 13
- 199Kansas CityMissouri 13
- 199DavenportIowa 13
- 199MuncieIndiana 13
- 199Grand RapidsMichigan 13
- 199HollandMichigan 13
- 199RochesterMinnesota 13
- 199ToledoOhio 13
- 199BrookingsSouth Dakota 13
- 199RexburgIdaho 13
- 199BendOregon 13
- 199Kirklandlow-cost sensorsWashington 13
- 211JasperIndiana 13
- 211New OrleansLouisiana 13
- 211HickoryNorth Carolina 13
- 211AkronOhio 13
- 211SuperiorWisconsin 13
- 211Agouralow-cost sensorsCalifornia 13
- 211ComptonCalifornia 13
- 211VictorvilleCalifornia 13
- 219Saint AndrewsSouth Carolina 12
- 219BloomingtonIllinois 12
- 219ElizabethNew Jersey 12
- 219San DiegoCalifornia 12
- 219Brightonlow-cost sensorsColorado 12
- 224DecaturAlabama 12
- 224TrussvilleAlabama 12
- 224AlbanyGeorgia 12
- 224FlorenceSouth Carolina 12
- 224RedfordMichigan 12
- 224Northglennlow-cost sensorsColorado 12
- 224ThorntonColorado 12
- 231BessemerAlabama 12
- 231SavannahGeorgia 12
- 231BaltimoreMaryland 12
- 231KnoxvilleTennessee 12
- 231LaredoTexas 12
- 231CharlestonWest Virginia 12
- 231CaryIllinois 12
- 231TaylorMichigan 12
- 231LimaOhio 12
- 231YoungstownOhio 12
- 231Pasadenalow-cost sensorsCalifornia 12
- 231Rapid CitySouth Dakota 12
- 243ElizabethtownKentucky 12
- 243ChalmetteLouisiana 12
- 243ChampaignIllinois 12
- 243AndersonIndiana 12
- 243ShakopeeMinnesota 12
- 243AlbanyNew York 12
- 243San JoseCalifornia 12
- 243AnacortesWashington 12
- 251ClarksvilleTennessee 12
- 251BeltonTexas 12
- 251San AntonioTexas 12
- 251PittsburghPennsylvania 12
- 251Sioux FallsSouth Dakota 12
- 251Santa BarbaraCalifornia 12
- 251Picnic Point-North LynnwoodWashington 12
- 258FairhopeAlabama 12
- 258GainesvilleGeorgia 12
- 258Lexington-FayetteKentucky 12
- 258Winston-SalemNorth Carolina 12
- 258WaterlooIowa 12
- 258Saint PaulMinnesota 12
- 258LebanonPennsylvania 12
- 258WaukeshaWisconsin 12
- 258RichmondCalifornia 12
- 258Eagle PassTexas 12
- 258ShorelineWashington 12
- 269Fort ThomasKentucky 12
- 269University CityMissouri 12
- 269DurhamNorth Carolina 12
- 269College StationTexas 12
- 269KokomoIndiana 12
- 269SouthfieldMichigan 12
- 269BurnsvilleMinnesota 12
- 269EwingNew Jersey 12
- 269McKeesportPennsylvania 12
- 269ClovisCalifornia 12
- 269TracyCalifornia 12
- 269GreeleyColorado 12
- 269Twin FallsIdaho 12
- 269RedmondOregon 12
- 283LeawoodKansas 11
- 283MorrisvilleNorth Carolina 11
- 283North CharlestonSouth Carolina 11
- 283GalvestonTexas 11
- 283LansingMichigan 11
- 283OmahaNebraska 11
- 283DublinOhio 11
- 283BensalemPennsylvania 11
- 283WilkinsburgPennsylvania 11
- 283AnaheimCalifornia 11
- 283BurbankCalifornia 11
- 283BoiseIdaho 11
- 283SeattleWashington 11
- 296West PensacolaFlorida 11
- 296McDonoughGeorgia 11
- 296Live OakTexas 11
- 296JenisonMichigan 11
- 296YumaArizona 11
- 296PowayCalifornia 11
- 296MillcreekUtah 11
- 303ColumbusGeorgia 11
- 303LawrencevilleGeorgia 11
- 303NorthbrookIllinois 11
- 303DuluthMinnesota 11
- 303West FargoNorth Dakota 11
- 303LincolnNebraska 11
- 303RenoNevada 11
- 303EugeneOregon 11
- 311ClemmonsNorth Carolina 11
- 311HendersonvilleTennessee 11
- 311GahannaOhio 11
- 311AberdeenSouth Dakota 11
- 311MercedCalifornia 11
- 311Santa PaulaCalifornia 11
- 311Arvadalow-cost sensorsColorado 11
- 311LongmontColorado 11
- 319WashingtonDistrict of Columbia 11
- 319Ponte Vedra BeachFlorida 11
- 319RaymoreMissouri 11
- 319ClaytonNorth Carolina 11
- 319FayettevilleNorth Carolina 11
- 319RaleighNorth Carolina 11
- 319LebanonOhio 11
- 319MasonOhio 11
- 319ColumbiaTennessee 11
- 319YpsilantiMichigan 11
- 319LindenNew Jersey 11
- 319New York CityNew York 11
- 319HarrisburgPennsylvania 11
- 319MadisonWisconsin 11
- 319WeirtonWest Virginia 11
- 319Weirton HeightsWest Virginia 11
- 319FolsomCalifornia 11
- 319TurlockCalifornia 11
- 319VallejoCalifornia 11
- 319La Crescenta-Montroselow-cost sensorsCalifornia 11
- 339Hunt ValleyMaryland 11
- 339LibertyMissouri 11
- 339Roanoke RapidsNorth Carolina 11
- 339MaryvilleTennessee 11
- 339Cedar ParkTexas 11
- 339EdinburgTexas 11
- 339RichmondVirginia 11
- 339LancasterPennsylvania 11
- 339South MilwaukeeWisconsin 11
- 339PaysonArizona 11
- 339LincolnCalifornia 11
- 339Santa ClaritaCalifornia 11
- 339El PasoTexas 11
- 339AlbanyOregon 11
- 339GilletteWyoming 11
- 354BloomingtonIndiana 11
- 354NicholasvilleKentucky 11
- 354GreensboroNorth Carolina 11
- 354PhiladelphiaPennsylvania 11
- 354AshburnVirginia 11
- 354EastpointeMichigan 11
- 354ScrantonPennsylvania 11
- 354Eau ClaireWisconsin 11
- 354StocktonCalifornia 11
- 363FishersIndiana 10
- 363PennsaukenNew Jersey 10
- 363Corpus ChristiTexas 10
- 363Bay CityMichigan 10
- 363Port HuronMichigan 10
- 363Apple ValleyMinnesota 10
- 363Saint MichaelMinnesota 10
- 363PatersonNew Jersey 10
- 363WatertownSouth Dakota 10
- 363LompocCalifornia 10
- 363Prunedalelow-cost sensorsCalifornia 10
- 363Simi ValleyCalifornia 10
- 363Yuba CityCalifornia 10
- 363Fort CollinsColorado 10
- 377LemayMissouri 10
- 377HarrisonburgVirginia 10
- 377JohnstownPennsylvania 10
- 377Arroyo GrandeCalifornia 10
- 377El CajonCalifornia 10
- 377Lakewoodlow-cost sensorsColorado 10
- 377WindsorColorado 10
- 377RoseburgOregon 10
- 385ShreveportLouisiana 10
- 385White OakOhio 10
- 385San MarcosTexas 10
- 385SpringfieldVirginia 10
- 385Jersey CityNew Jersey 10
- 385CarlislePennsylvania 10
- 385Florinlow-cost sensorsCalifornia 10
- 385Lake ElsinoreCalifornia 10
- 385ModestoCalifornia 10
- 385OaklandCalifornia 10
- 385Thousand OaksCalifornia 10
- 385DenverColorado 10
- 397CookevilleTennessee 10
- 397Short PumpVirginia 10
- 397Cleveland HeightsOhio 10
- 397New HavenConnecticut 10
- 397BuffaloNew York 10
- 397BanningCalifornia 10
- 397OxnardCalifornia 10
- 397RosevilleCalifornia 10
- 397San LeandroCalifornia 10
- 397ReddingCalifornia 10
- 397Idaho FallsIdaho 10
- 397PocatelloIdaho 10
- 397TigardOregon 10
- 410ScaggsvilleMaryland 10
- 410KingsportTennessee 10
- 410HopewellVirginia 10
- 410DanburyConnecticut 10
- 410HartfordConnecticut 10
- 410MuscatineIowa 10
- 410Saint CloudMinnesota 10
- 410Shaker HeightsOhio 10
- 410ReadingPennsylvania 10
- 410NogalesArizona 10
- 410DavisCalifornia 10
- 410GaltCalifornia 10
- 410OdessaTexas 10
- 423Toms RiverNew Jersey 10
- 423MissionTexas 10
- 423TaylorTexas 10
- 423RoanokeVirginia 10
- 423ZionIllinois 10
- 423Grand IslandNebraska 10
- 423New BrunswickNew Jersey 10
- 423EriePennsylvania 10
- 423AppletonWisconsin 10
- 423Green BayWisconsin 10
- 423SalinasCalifornia 10
- 423San FranciscoCalifornia 10
- 423Windsorlow-cost sensorsCalifornia 10
- 423Dodge CityKansas 10
- 423CanbyOregon 10
- 438NewarkDelaware 10
- 438EssexMaryland 10
- 438AshevilleNorth Carolina 10
- 438BrownsvilleTexas 10
- 438TrentonNew Jersey 10
- 438Goletalow-cost sensorsCalifornia 10
- 438VacavilleCalifornia 10
- 438BoulderColorado 10
- 438CondaIdaho 10
- 438GreshamOregon 10
- 438PortlandOregon 10
- 438SalemOregon 10
- 438BellevueWashington 10
- 438Oxon Hill-GlassmanorMaryland 10
- 452OcalaFlorida 9
- 452CharlottesvilleVirginia 9
- 452Rose HillVirginia 9
- 452SpringfieldMassachusetts 9
- 452Fort LeeNew Jersey 9
- 452MedinaOhio 9
- 452NorristownPennsylvania 9
- 452State CollegePennsylvania 9
- 452Casa GrandeArizona 9
- 452PhoenixArizona 9
- 452ChicoCalifornia 9
- 452San Luis ObispoCalifornia 9
- 452Salt Lake CityUtah 9
- 452West JordanUtah 9
- 452TacomaWashington 9
- 452SheridanWyoming 9
- 468Fort SmithArkansas 9
- 468DoverDelaware 9
- 468Kendale LakesFlorida 9
- 468VeniceFlorida 9
- 468ChesterPennsylvania 9
- 468BellevueNebraska 9
- 468PainesvilleOhio 9
- 468HermitagePennsylvania 9
- 468BrawleyCalifornia 9
- 468MartinezCalifornia 9
- 468Watsonvillelow-cost sensorsCalifornia 9
- 468Colorado SpringsColorado 9
- 468AltamontOregon 9
- 468BountifulUtah 9
- 482WilmingtonDelaware 9
- 482BrunswickGeorgia 9
- 482PleasantvilleNew Jersey 9
- 482La VistaNebraska 9
- 482Seasidelow-cost sensorsCalifornia 9
- 482RentonWashington 9
- 488EdgewoodMaryland 9
- 488HaverhillMassachusetts 9
- 488RochesterNew York 9
- 488AltoonaPennsylvania 9
- 488BethlehemPennsylvania 9
- 488El CentroCalifornia 9
- 488HollisterCalifornia 9
- 488Live Oaklow-cost sensorsCalifornia 9
- 488OremUtah 9
- 497JacksonvilleFlorida 9
- 497HagerstownMaryland 9
- 497SewellNew Jersey 9
- 497South VinelandNew Jersey 9
- 497ChesapeakeVirginia 9
- 497HolbrookNew York 9
- 497AllentownPennsylvania 9
- 497MantecaCalifornia 9
- 497HobbsNew Mexico 9
- 497Cedar CityUtah 9
- 497BeavertonOregon 9
- 497Oregon CityOregon 9
- 497HighlandUtah 9
- 497West Valley CityUtah 9
- 497BurienWashington 9
- 512BearDelaware 9
- 512BayonneNew Jersey 9
- 512BridgeportConnecticut 9
- 512FlagstaffArizona 9
- 512South San Franciscolow-cost sensorsCalifornia 9
- 512UkiahCalifornia 9
- 512LittletonColorado 9
- 512HillsboroOregon 9
- 512MilwaukieOregon 9
- 521Bonita SpringsFlorida 9
- 521Fruit CoveFlorida 9
- 521WaterburyConnecticut 9
- 521BostonMassachusetts 9
- 521FraminghamMassachusetts 9
- 521ParklandWashington 9
- 521Salmon CreekWashington 9
- 528Atlantic CityNew Jersey 8
- 528BrocktonMassachusetts 8
- 528PittsfieldMassachusetts 8
- 528PortlandMaine 8
- 528GilroyCalifornia 8
- 528Palo Altolow-cost sensorsCalifornia 8
- 528TruckeeCalifornia 8
- 528Spanish ForkUtah 8
- 528CentraliaWashington 8
- 528Port AngelesWashington 8
- 528Arden-ArcadeCalifornia 8
- 539GainesvilleFlorida 8
- 539ElktonMaryland 8
- 539FillmoreCalifornia 8
- 539IndioCalifornia 8
- 539Ken CarylColorado 8
- 539MagnaUtah 8
- 539BremertonWashington 8
- 546ColumbusIndiana 8
- 546East HamptonVirginia 8
- 546LowellMassachusetts 8
- 546ProvidenceRhode Island 8
- 546TempeArizona 8
- 546TucsonArizona 8
- 546SacramentoCalifornia 8
- 546Brigham CityUtah 8
- 546VancouverWashington 8
- 546AnchorageAlaska 8
- 556MiamiFlorida 8
- 556RockvilleMaryland 8
- 556GreenfieldMassachusetts 8
- 556SyracuseNew York 8
- 556LancasterCalifornia 8
- 556PleasantonCalifornia 8
- 556PuebloColorado 8
- 556LubbockTexas 8
- 556North OgdenUtah 8
- 556TooeleUtah 8
- 556BellinghamWashington 8
- 567Lexingtonlow-cost sensorsMassachusetts 8
- 567MilfordMassachusetts 8
- 567WorcesterMassachusetts 8
- 567NewburghNew York 8
- 567White PlainsNew York 8
- 567NipomoCalifornia 8
- 567Redwood CityCalifornia 8
- 567Cañon CityColorado 8
- 567LaceyWashington 8
- 576St. PetersburgFlorida 8
- 576KeeneNew Hampshire 8
- 576PawtucketRhode Island 8
- 576LongviewWashington 8
- 576RandolphNew Jersey 8
- 581ValricoFlorida 8
- 581GreenvilleNorth Carolina 8
- 581New LondonConnecticut 8
- 581North ChicopeeMassachusetts 8
- 581MarquetteMichigan 8
- 581PortsmouthNew Hampshire 8
- 581UticaNew York 8
- 581Carson CityNevada 8
- 589TampaFlorida 7
- 589Fall RiverMassachusetts 7
- 589DerryNew Hampshire 7
- 589TemeculaCalifornia 7
- 589CasperWyoming 7
- 594Daytona BeachFlorida 7
- 594LynnMassachusetts 7
- 594Las VegasNevada 7
- 594Spanish SpringsNevada 7
- 594WoodburnOregon 7
- 594CheyenneWyoming 7
- 594LaramieWyoming 7
- 594Rock SpringsWyoming 7
- 602HomesteadFlorida 7
- 602Oak RidgeFlorida 7
- 602QuincyMassachusetts 7
- 602RutlandVermont 7
- 602SocorroTexas 7
- 607New CityNew York 7
- 607GlendaleArizona 7
- 607MesaArizona 7
- 607ParadiseCalifornia 7
- 607Sunland ParkNew Mexico 7
- 607CorvallisOregon 7
- 613Palm CityFlorida 7
- 613South LaurelMaryland 7
- 613Santa CruzCalifornia 7
- 613HerrimanUtah 7
- 617Belle GladeFlorida 7
- 617Fort LauderdaleFlorida 7
- 617Safety HarborFlorida 7
- 617AugustaMaine 7
- 617ConcordCalifornia 7
- 622East LakeFlorida 7
- 622Lake MaryFlorida 7
- 622BangorMaine 7
- 622LewistonMaine 7
- 622Spring ValleyNevada 7
- 622HurricaneUtah 7
- 622DallasOregon 7
- 622AberdeenWashington 7
- 622Four CornersFlorida 7
- 631OrlandoFlorida 6
- 631SarasotaFlorida 6
- 631AtascaderoCalifornia 6
- 631San RafaelCalifornia 6
- 631EnterpriseNevada 6
- 631McMinnvilleOregon 6
- 637Winter ParkFlorida 6
- 637LivermoreCalifornia 6
- 637AlbuquerqueNew Mexico 6
- 640Deerfield BeachFlorida 6
- 640Delray BeachFlorida 6
- 640Grand JunctionColorado 6
- 640FairbanksAlaska 6
- 640Summerlin SouthNevada 6
- 645DavieFlorida 6
- 645Fort MyersFlorida 6
- 645BlaineMinnesota 6
- 645Rio RanchoNew Mexico 6
- 645HendersonNevada 6
- 650HiloHawaii 6
- 651WellingtonFlorida 5
- 651WestonFlorida 5
- 651RidgecrestCalifornia 5
- 651Las CrucesNew Mexico 5
- 651Mount VernonWashington 5
- 651KahuluiHawaii 5
- 651HonoluluHawaii 5
- 658Casas AdobesArizona 5
- 658Apache JunctionArizona 5
- 658KīheiHawaii 5
- 658Makakilo / Kapolei / Honokai HaleHawaii 5
- 662Palm BayFlorida 5
- 662OrcuttCalifornia 5
- 662Santa RosaCalifornia 5
- 662BadgerAlaska 5
- 666Coconut CreekFlorida 5
- 666Coos BayOregon 5
- 668LaconiaNew Hampshire 5
- 668Boulder CityNevada 5
- 668MesquiteNevada 5
- 668Oak HarborWashington 5
- 672Forest GroveOregon 5
- 673MaranaArizona 4
- 674CoventryRhode Island 4
- 675Green ValleyArizona 3
Excellent0–50
Good51–100
Lightly polluted101–150
Moderately polluted151–200
Heavily polluted201–300
Severely polluted301+
China's Air Quality Index (HJ 633-2012), PM2.5 individual index. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
All cities in the world, September 2025 · United States now
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SmogRank, most polluted cities in United States, PM2.5, September 2025, smogrank.com/us/history/2025-09 (accessed 2 Oct 2026).
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