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 254
- 2WenatcheeWashington 99
- 3YakimaWashington 68
- 4Moses LakeWashington 67
- 5Grants PassOregon 67
- 6Coeur d'AleneIdaho 66
- 7SpokaneWashington 65
- 8Spokane ValleyWashington 63
- 9SunnysideWashington 62
- 10LewistonIdaho 61
- 11MoscowIdaho 61
- 12Great FallsMontana 60
- 13Columbialow-cost sensorsMissouri 60
- 13BakersfieldCalifornia 60
- 15HoustonTexas 59
- 16EllensburgWashington 59
- 17MankatoMinnesota 59
- 18Wake Forestlow-cost sensorsNorth Carolina 58
- 19MiddletownOhio 58
- 20West MemphisArkansas 58
- 20HermistonOregon 58
- 20Tri-CitiesWashington 58
- 23PullmanWashington 57
- 24MaconGeorgia 57
- 25IndianapolisIndiana 57
- 25HernandoMississippi 57
- 25Oconomowoclow-cost sensorsWisconsin 57
- 28NorwoodOhio 56
- 28ConroeTexas 56
- 30BartlettTennessee 56
- 31RiversideCalifornia 56
- 31MedfordOregon 56
- 33OwensboroKentucky 56
- 33CincinnatiOhio 56
- 33ColumbusOhio 56
- 36JacksonMississippi 56
- 36PortervilleCalifornia 56
- 38HattiesburgMississippi 55
- 38WyomingMichigan 55
- 40PortsmouthOhio 55
- 40PasadenaTexas 55
- 42MooreOklahoma 55
- 42BrookfieldIllinois 55
- 44Baton RougeLouisiana 55
- 44GaryIndiana 55
- 46BirminghamAlabama 55
- 46JeffersonvilleIndiana 55
- 46Saint JosephMissouri 55
- 49TulsaOklahoma 55
- 49DentonTexas 55
- 49Fort DodgeIowa 55
- 49OregonOhio 55
- 49CorcoranCalifornia 55
- 49Walla WallaWashington 55
- 55GadsdenAlabama 54
- 55BridgeviewIllinois 54
- 55PerrysburgOhio 54
- 58WichitaKansas 54
- 58St. LouisMissouri 54
- 58GlendoraCalifornia 54
- 61AugustaGeorgia 54
- 61LafayetteLouisiana 54
- 63TallahasseeFlorida 54
- 63BaytownTexas 54
- 63Franklin ParkIllinois 54
- 63LafayetteIndiana 54
- 63AshlandOregon 54
- 68Granite CityIllinois 54
- 68Terre HauteIndiana 54
- 68TopekaKansas 54
- 68Hawthornelow-cost sensorsCalifornia 54
- 72MontgomeryAlabama 53
- 72East Saint LouisIllinois 53
- 72ChicagoIllinois 53
- 72ClevelandOhio 53
- 72VisaliaCalifornia 53
- 72BillingsMontana 53
- 78Little RockArkansas 53
- 78ValdostaGeorgia 53
- 78LexingtonNorth Carolina 53
- 78YorkPennsylvania 53
- 78Elmwood ParkIllinois 53
- 78Carsonlow-cost sensorsCalifornia 53
- 84Kansas CityKansas 53
- 84McAlesterOklahoma 53
- 86HuntsvilleAlabama 53
- 86SpringdaleArkansas 53
- 86AtlantaGeorgia 53
- 86Warner RobinsGeorgia 53
- 86EvansvilleIndiana 53
- 86LouisvilleKentucky 53
- 86Fort WorthTexas 53
- 86Des MoinesIowa 53
- 86KalamazooMichigan 53
- 86NampaIdaho 53
- 86HelenaMontana 53
- 97Upper AltonIllinois 53
- 97Oklahoma CityOklahoma 53
- 97Jurupa ValleyCalifornia 53
- 97MissoulaMontana 53
- 97PendletonOregon 53
- 102PaducahKentucky 52
- 102SteubenvilleOhio 52
- 102WestervilleOhio 52
- 102HanfordCalifornia 52
- 106OlatheKansas 52
- 106Mission BendTexas 52
- 106ElginIllinois 52
- 106BerkeleyCalifornia 52
- 110SulphurLouisiana 52
- 110Missouri CityTexas 52
- 110Calumet CityIllinois 52
- 110DoltonIllinois 52
- 110PeoriaIllinois 52
- 110Fort WayneIndiana 52
- 116DaytonOhio 52
- 116East RidgeTennessee 52
- 116JacksonTennessee 52
- 116SaginawTexas 52
- 116Cedar RapidsIowa 52
- 116ClintonIowa 52
- 116MolineIllinois 52
- 116ElkhartIndiana 52
- 116Michigan CityIndiana 52
- 116CantonOhio 52
- 116Inglewoodlow-cost sensorsCalifornia 52
- 116Santa Monicalow-cost sensorsCalifornia 52
- 128JenksOklahoma 52
- 128ChattanoogaTennessee 52
- 128Des PlainesIllinois 52
- 128HammondIndiana 52
- 128FontanaCalifornia 52
- 128Long BeachCalifornia 52
- 128MaderaCalifornia 52
- 128ButteMontana 52
- 136DecaturIllinois 52
- 136Valley StationKentucky 52
- 136KennerLouisiana 52
- 136DearbornMichigan 52
- 136DetroitMichigan 52
- 136West MifflinPennsylvania 52
- 136Torrancelow-cost sensorsCalifornia 52
- 136BozemanMontana 52
- 136Columbia CityWashington 52
- 145New AlbanyIndiana 51
- 145Ponca CityOklahoma 51
- 145NashvilleTennessee 51
- 145Iowa CityIowa 51
- 145Ann Arborlow-cost sensorsMichigan 51
- 145WarrenOhio 51
- 145Lomitalow-cost sensorsCalifornia 51
- 152PrichardAlabama 51
- 152Ferry PassFlorida 51
- 152AshlandKentucky 51
- 152RockfordIllinois 51
- 152FresnoCalifornia 51
- 157SpringfieldIllinois 51
- 157PascagoulaMississippi 51
- 157CorsicanaTexas 51
- 157NapervilleIllinois 51
- 157South BendIndiana 51
- 157Los AngelesCalifornia 51
- 157AuburnWashington 51
- 157MidwayFlorida 51
- 165Camdenlow-cost sensorsNew Jersey 50
- 165PortageIndiana 50
- 165Inglewood-Finn Hilllow-cost sensorsWashington 50
- 168JeffersontownKentucky 49
- 168SpringfieldMissouri 49
- 168GulfportMississippi 49
- 168SpringfieldOhio 49
- 168GreenvilleSouth Carolina 49
- 168SpartanburgSouth Carolina 49
- 168AustinTexas 49
- 168La PorteTexas 49
- 168Port ArthurTexas 49
- 168JolietIllinois 49
- 168WoodlandCalifornia 49
- 168Candler-McAfeeGeorgia 49
- 180DerbyKansas 49
- 180Saint MatthewsKentucky 49
- 180ArnoldMissouri 49
- 180CharlotteNorth Carolina 49
- 180EdmondOklahoma 49
- 180HuntingtonWest Virginia 49
- 180AuroraIllinois 49
- 180MinneapolisMinnesota 49
- 180MilwaukeeWisconsin 49
- 180The DallesOregon 49
- 190HueytownAlabama 48
- 190LawtonOklahoma 48
- 190DyersburgTennessee 48
- 190AnkenyIowa 48
- 190Oak LawnIllinois 48
- 190East ChicagoIndiana 48
- 190Lincoln ParkMichigan 48
- 190Abingtonlow-cost sensorsPennsylvania 48
- 190OceansideCalifornia 48
- 199AthensGeorgia 48
- 199Kansas CityMissouri 48
- 199DavenportIowa 48
- 199MuncieIndiana 48
- 199Grand RapidsMichigan 48
- 199HollandMichigan 48
- 199RochesterMinnesota 48
- 199ToledoOhio 48
- 199BrookingsSouth Dakota 48
- 199RexburgIdaho 48
- 199BendOregon 48
- 199Kirklandlow-cost sensorsWashington 48
- 211JasperIndiana 47
- 211New OrleansLouisiana 47
- 211HickoryNorth Carolina 47
- 211AkronOhio 47
- 211SuperiorWisconsin 47
- 211Agouralow-cost sensorsCalifornia 47
- 211ComptonCalifornia 47
- 211VictorvilleCalifornia 47
- 219Saint AndrewsSouth Carolina 47
- 219BloomingtonIllinois 47
- 219ElizabethNew Jersey 47
- 219San DiegoCalifornia 47
- 219Brightonlow-cost sensorsColorado 47
- 224DecaturAlabama 46
- 224TrussvilleAlabama 46
- 224AlbanyGeorgia 46
- 224FlorenceSouth Carolina 46
- 224RedfordMichigan 46
- 224Northglennlow-cost sensorsColorado 46
- 224ThorntonColorado 46
- 231BessemerAlabama 46
- 231SavannahGeorgia 46
- 231BaltimoreMaryland 46
- 231KnoxvilleTennessee 46
- 231LaredoTexas 46
- 231CharlestonWest Virginia 46
- 231CaryIllinois 46
- 231TaylorMichigan 46
- 231LimaOhio 46
- 231YoungstownOhio 46
- 231Pasadenalow-cost sensorsCalifornia 46
- 231Rapid CitySouth Dakota 46
- 243ElizabethtownKentucky 45
- 243ChalmetteLouisiana 45
- 243ChampaignIllinois 45
- 243AndersonIndiana 45
- 243ShakopeeMinnesota 45
- 243AlbanyNew York 45
- 243San JoseCalifornia 45
- 243AnacortesWashington 45
- 251ClarksvilleTennessee 44
- 251BeltonTexas 44
- 251San AntonioTexas 44
- 251PittsburghPennsylvania 44
- 251Sioux FallsSouth Dakota 44
- 251Santa BarbaraCalifornia 44
- 251Picnic Point-North LynnwoodWashington 44
- 258FairhopeAlabama 44
- 258GainesvilleGeorgia 44
- 258Lexington-FayetteKentucky 44
- 258Winston-SalemNorth Carolina 44
- 258WaterlooIowa 44
- 258Saint PaulMinnesota 44
- 258LebanonPennsylvania 44
- 258WaukeshaWisconsin 44
- 258RichmondCalifornia 44
- 258Eagle PassTexas 44
- 258ShorelineWashington 44
- 269Fort ThomasKentucky 43
- 269University CityMissouri 43
- 269DurhamNorth Carolina 43
- 269College StationTexas 43
- 269KokomoIndiana 43
- 269SouthfieldMichigan 43
- 269BurnsvilleMinnesota 43
- 269EwingNew Jersey 43
- 269McKeesportPennsylvania 43
- 269ClovisCalifornia 43
- 269TracyCalifornia 43
- 269GreeleyColorado 43
- 269Twin FallsIdaho 43
- 269RedmondOregon 43
- 283LeawoodKansas 43
- 283MorrisvilleNorth Carolina 43
- 283North CharlestonSouth Carolina 43
- 283GalvestonTexas 43
- 283LansingMichigan 43
- 283OmahaNebraska 43
- 283DublinOhio 43
- 283BensalemPennsylvania 43
- 283WilkinsburgPennsylvania 43
- 283AnaheimCalifornia 43
- 283BurbankCalifornia 43
- 283BoiseIdaho 43
- 283SeattleWashington 43
- 296West PensacolaFlorida 42
- 296McDonoughGeorgia 42
- 296Live OakTexas 42
- 296JenisonMichigan 42
- 296YumaArizona 42
- 296PowayCalifornia 42
- 296MillcreekUtah 42
- 303ColumbusGeorgia 42
- 303LawrencevilleGeorgia 42
- 303NorthbrookIllinois 42
- 303DuluthMinnesota 42
- 303West FargoNorth Dakota 42
- 303LincolnNebraska 42
- 303RenoNevada 42
- 303EugeneOregon 42
- 311ClemmonsNorth Carolina 41
- 311HendersonvilleTennessee 41
- 311GahannaOhio 41
- 311AberdeenSouth Dakota 41
- 311MercedCalifornia 41
- 311Santa PaulaCalifornia 41
- 311Arvadalow-cost sensorsColorado 41
- 311LongmontColorado 41
- 319WashingtonDistrict of Columbia 41
- 319Ponte Vedra BeachFlorida 41
- 319RaymoreMissouri 41
- 319ClaytonNorth Carolina 41
- 319FayettevilleNorth Carolina 41
- 319RaleighNorth Carolina 41
- 319LebanonOhio 41
- 319MasonOhio 41
- 319ColumbiaTennessee 41
- 319YpsilantiMichigan 41
- 319LindenNew Jersey 41
- 319New York CityNew York 41
- 319HarrisburgPennsylvania 41
- 319MadisonWisconsin 41
- 319WeirtonWest Virginia 41
- 319Weirton HeightsWest Virginia 41
- 319FolsomCalifornia 41
- 319TurlockCalifornia 41
- 319VallejoCalifornia 41
- 319La Crescenta-Montroselow-cost sensorsCalifornia 41
- 339Hunt ValleyMaryland 40
- 339LibertyMissouri 40
- 339Roanoke RapidsNorth Carolina 40
- 339MaryvilleTennessee 40
- 339Cedar ParkTexas 40
- 339EdinburgTexas 40
- 339RichmondVirginia 40
- 339LancasterPennsylvania 40
- 339South MilwaukeeWisconsin 40
- 339PaysonArizona 40
- 339LincolnCalifornia 40
- 339Santa ClaritaCalifornia 40
- 339El PasoTexas 40
- 339AlbanyOregon 40
- 339GilletteWyoming 40
- 354BloomingtonIndiana 39
- 354NicholasvilleKentucky 39
- 354GreensboroNorth Carolina 39
- 354PhiladelphiaPennsylvania 39
- 354AshburnVirginia 39
- 354EastpointeMichigan 39
- 354ScrantonPennsylvania 39
- 354Eau ClaireWisconsin 39
- 354StocktonCalifornia 39
- 363FishersIndiana 39
- 363PennsaukenNew Jersey 39
- 363Corpus ChristiTexas 39
- 363Bay CityMichigan 39
- 363Port HuronMichigan 39
- 363Apple ValleyMinnesota 39
- 363Saint MichaelMinnesota 39
- 363PatersonNew Jersey 39
- 363WatertownSouth Dakota 39
- 363LompocCalifornia 39
- 363Prunedalelow-cost sensorsCalifornia 39
- 363Simi ValleyCalifornia 39
- 363Yuba CityCalifornia 39
- 363Fort CollinsColorado 39
- 377LemayMissouri 38
- 377HarrisonburgVirginia 38
- 377JohnstownPennsylvania 38
- 377Arroyo GrandeCalifornia 38
- 377El CajonCalifornia 38
- 377Lakewoodlow-cost sensorsColorado 38
- 377WindsorColorado 38
- 377RoseburgOregon 38
- 385ShreveportLouisiana 38
- 385White OakOhio 38
- 385San MarcosTexas 38
- 385SpringfieldVirginia 38
- 385Jersey CityNew Jersey 38
- 385CarlislePennsylvania 38
- 385Florinlow-cost sensorsCalifornia 38
- 385Lake ElsinoreCalifornia 38
- 385ModestoCalifornia 38
- 385OaklandCalifornia 38
- 385Thousand OaksCalifornia 38
- 385DenverColorado 38
- 397CookevilleTennessee 37
- 397Short PumpVirginia 37
- 397Cleveland HeightsOhio 37
- 397New HavenConnecticut 37
- 397BuffaloNew York 37
- 397BanningCalifornia 37
- 397OxnardCalifornia 37
- 397RosevilleCalifornia 37
- 397San LeandroCalifornia 37
- 397ReddingCalifornia 37
- 397Idaho FallsIdaho 37
- 397PocatelloIdaho 37
- 397TigardOregon 37
- 410ScaggsvilleMaryland 37
- 410KingsportTennessee 37
- 410HopewellVirginia 37
- 410DanburyConnecticut 37
- 410HartfordConnecticut 37
- 410MuscatineIowa 37
- 410Saint CloudMinnesota 37
- 410Shaker HeightsOhio 37
- 410ReadingPennsylvania 37
- 410NogalesArizona 37
- 410DavisCalifornia 37
- 410GaltCalifornia 37
- 410OdessaTexas 37
- 423Toms RiverNew Jersey 36
- 423MissionTexas 36
- 423TaylorTexas 36
- 423RoanokeVirginia 36
- 423ZionIllinois 36
- 423Grand IslandNebraska 36
- 423New BrunswickNew Jersey 36
- 423EriePennsylvania 36
- 423AppletonWisconsin 36
- 423Green BayWisconsin 36
- 423SalinasCalifornia 36
- 423San FranciscoCalifornia 36
- 423Windsorlow-cost sensorsCalifornia 36
- 423Dodge CityKansas 36
- 423CanbyOregon 36
- 438NewarkDelaware 36
- 438EssexMaryland 36
- 438AshevilleNorth Carolina 36
- 438BrownsvilleTexas 36
- 438TrentonNew Jersey 36
- 438Goletalow-cost sensorsCalifornia 36
- 438VacavilleCalifornia 36
- 438BoulderColorado 36
- 438CondaIdaho 36
- 438GreshamOregon 36
- 438PortlandOregon 36
- 438SalemOregon 36
- 438BellevueWashington 36
- 438Oxon Hill-GlassmanorMaryland 36
- 452OcalaFlorida 35
- 452CharlottesvilleVirginia 35
- 452Rose HillVirginia 35
- 452SpringfieldMassachusetts 35
- 452Fort LeeNew Jersey 35
- 452MedinaOhio 35
- 452NorristownPennsylvania 35
- 452State CollegePennsylvania 35
- 452Casa GrandeArizona 35
- 452PhoenixArizona 35
- 452ChicoCalifornia 35
- 452San Luis ObispoCalifornia 35
- 452Salt Lake CityUtah 35
- 452West JordanUtah 35
- 452TacomaWashington 35
- 452SheridanWyoming 35
- 468Fort SmithArkansas 34
- 468DoverDelaware 34
- 468Kendale LakesFlorida 34
- 468VeniceFlorida 34
- 468ChesterPennsylvania 34
- 468BellevueNebraska 34
- 468PainesvilleOhio 34
- 468HermitagePennsylvania 34
- 468BrawleyCalifornia 34
- 468MartinezCalifornia 34
- 468Watsonvillelow-cost sensorsCalifornia 34
- 468Colorado SpringsColorado 34
- 468AltamontOregon 34
- 468BountifulUtah 34
- 482WilmingtonDelaware 34
- 482BrunswickGeorgia 34
- 482PleasantvilleNew Jersey 34
- 482La VistaNebraska 34
- 482Seasidelow-cost sensorsCalifornia 34
- 482RentonWashington 34
- 488EdgewoodMaryland 33
- 488HaverhillMassachusetts 33
- 488RochesterNew York 33
- 488AltoonaPennsylvania 33
- 488BethlehemPennsylvania 33
- 488El CentroCalifornia 33
- 488HollisterCalifornia 33
- 488Live Oaklow-cost sensorsCalifornia 33
- 488OremUtah 33
- 497JacksonvilleFlorida 33
- 497HagerstownMaryland 33
- 497SewellNew Jersey 33
- 497South VinelandNew Jersey 33
- 497ChesapeakeVirginia 33
- 497HolbrookNew York 33
- 497AllentownPennsylvania 33
- 497MantecaCalifornia 33
- 497HobbsNew Mexico 33
- 497Cedar CityUtah 33
- 497BeavertonOregon 33
- 497Oregon CityOregon 33
- 497HighlandUtah 33
- 497West Valley CityUtah 33
- 497BurienWashington 33
- 512BearDelaware 32
- 512BayonneNew Jersey 32
- 512BridgeportConnecticut 32
- 512FlagstaffArizona 32
- 512South San Franciscolow-cost sensorsCalifornia 32
- 512UkiahCalifornia 32
- 512LittletonColorado 32
- 512HillsboroOregon 32
- 512MilwaukieOregon 32
- 521Bonita SpringsFlorida 32
- 521Fruit CoveFlorida 32
- 521WaterburyConnecticut 32
- 521BostonMassachusetts 32
- 521FraminghamMassachusetts 32
- 521ParklandWashington 32
- 521Salmon CreekWashington 32
- 528Atlantic CityNew Jersey 31
- 528BrocktonMassachusetts 31
- 528PittsfieldMassachusetts 31
- 528PortlandMaine 31
- 528GilroyCalifornia 31
- 528Palo Altolow-cost sensorsCalifornia 31
- 528TruckeeCalifornia 31
- 528Spanish ForkUtah 31
- 528CentraliaWashington 31
- 528Port AngelesWashington 31
- 528Arden-ArcadeCalifornia 31
- 539GainesvilleFlorida 31
- 539ElktonMaryland 31
- 539FillmoreCalifornia 31
- 539IndioCalifornia 31
- 539Ken CarylColorado 31
- 539MagnaUtah 31
- 539BremertonWashington 31
- 546ColumbusIndiana 30
- 546East HamptonVirginia 30
- 546LowellMassachusetts 30
- 546ProvidenceRhode Island 30
- 546TempeArizona 30
- 546TucsonArizona 30
- 546SacramentoCalifornia 30
- 546Brigham CityUtah 30
- 546VancouverWashington 30
- 546AnchorageAlaska 30
- 556MiamiFlorida 29
- 556RockvilleMaryland 29
- 556GreenfieldMassachusetts 29
- 556SyracuseNew York 29
- 556LancasterCalifornia 29
- 556PleasantonCalifornia 29
- 556PuebloColorado 29
- 556LubbockTexas 29
- 556North OgdenUtah 29
- 556TooeleUtah 29
- 556BellinghamWashington 29
- 567Lexingtonlow-cost sensorsMassachusetts 29
- 567MilfordMassachusetts 29
- 567WorcesterMassachusetts 29
- 567NewburghNew York 29
- 567White PlainsNew York 29
- 567NipomoCalifornia 29
- 567Redwood CityCalifornia 29
- 567Cañon CityColorado 29
- 567LaceyWashington 29
- 576St. PetersburgFlorida 28
- 576KeeneNew Hampshire 28
- 576PawtucketRhode Island 28
- 576LongviewWashington 28
- 576RandolphNew Jersey 28
- 581ValricoFlorida 28
- 581GreenvilleNorth Carolina 28
- 581New LondonConnecticut 28
- 581North ChicopeeMassachusetts 28
- 581MarquetteMichigan 28
- 581PortsmouthNew Hampshire 28
- 581UticaNew York 28
- 581Carson CityNevada 28
- 589TampaFlorida 27
- 589Fall RiverMassachusetts 27
- 589DerryNew Hampshire 27
- 589TemeculaCalifornia 27
- 589CasperWyoming 27
- 594Daytona BeachFlorida 27
- 594LynnMassachusetts 27
- 594Las VegasNevada 27
- 594Spanish SpringsNevada 27
- 594WoodburnOregon 27
- 594CheyenneWyoming 27
- 594LaramieWyoming 27
- 594Rock SpringsWyoming 27
- 602HomesteadFlorida 26
- 602Oak RidgeFlorida 26
- 602QuincyMassachusetts 26
- 602RutlandVermont 26
- 602SocorroTexas 26
- 607New CityNew York 26
- 607GlendaleArizona 26
- 607MesaArizona 26
- 607ParadiseCalifornia 26
- 607Sunland ParkNew Mexico 26
- 607CorvallisOregon 26
- 613Palm CityFlorida 25
- 613South LaurelMaryland 25
- 613Santa CruzCalifornia 25
- 613HerrimanUtah 25
- 617Belle GladeFlorida 24
- 617Fort LauderdaleFlorida 24
- 617Safety HarborFlorida 24
- 617AugustaMaine 24
- 617ConcordCalifornia 24
- 622East LakeFlorida 24
- 622Lake MaryFlorida 24
- 622BangorMaine 24
- 622LewistonMaine 24
- 622Spring ValleyNevada 24
- 622HurricaneUtah 24
- 622DallasOregon 24
- 622AberdeenWashington 24
- 622Four CornersFlorida 24
- 631OrlandoFlorida 23
- 631SarasotaFlorida 23
- 631AtascaderoCalifornia 23
- 631San RafaelCalifornia 23
- 631EnterpriseNevada 23
- 631McMinnvilleOregon 23
- 637Winter ParkFlorida 22
- 637LivermoreCalifornia 22
- 637AlbuquerqueNew Mexico 22
- 640Deerfield BeachFlorida 22
- 640Delray BeachFlorida 22
- 640Grand JunctionColorado 22
- 640FairbanksAlaska 22
- 640Summerlin SouthNevada 22
- 645DavieFlorida 21
- 645Fort MyersFlorida 21
- 645BlaineMinnesota 21
- 645Rio RanchoNew Mexico 21
- 645HendersonNevada 21
- 650HiloHawaii 20
- 651WellingtonFlorida 19
- 651WestonFlorida 19
- 651RidgecrestCalifornia 19
- 651Las CrucesNew Mexico 19
- 651Mount VernonWashington 19
- 651KahuluiHawaii 19
- 651HonoluluHawaii 19
- 658Casas AdobesArizona 19
- 658Apache JunctionArizona 19
- 658KīheiHawaii 19
- 658Makakilo / Kapolei / Honokai HaleHawaii 19
- 662Palm BayFlorida 18
- 662OrcuttCalifornia 18
- 662Santa RosaCalifornia 18
- 662BadgerAlaska 18
- 666Coconut CreekFlorida 18
- 666Coos BayOregon 18
- 668LaconiaNew Hampshire 17
- 668Boulder CityNevada 17
- 668MesquiteNevada 17
- 668Oak HarborWashington 17
- 672Forest GroveOregon 17
- 673MaranaArizona 15
- 674CoventryRhode Island 13
- 675Green ValleyArizona 12
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). 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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