SmogRank / World / United States / August 2025
Most polluted cities in United States, August 2025
661 cities in United States ranked by their average PM2.5 over the 31 days. Worst: Superior at 20.1 µg/m³, #128 of 2,284 cities in the world. Cleanest: Anchorage at 1.9. A city needs measurements on 70% of the days to be ranked.
← Superior 20.1
- 1SuperiorWisconsin 20.1
- 2Oconomowoclow-cost sensorsWisconsin 18.9
- 3MankatoMinnesota 18.5
- 4Columbialow-cost sensorsMissouri 16.4
- 5Green BayWisconsin 16.2
- 6DuluthMinnesota 16.1
- 7MilwaukeeWisconsin 15.5
- 8WyomingMichigan 15.3
- 9Pasadenalow-cost sensorsCalifornia 15.2
- 10Elmwood ParkIllinois 15.0
- 10BuffaloNew York 15.0
- 12CalexicoCalifornia 14.9
- 13AppletonWisconsin 14.8
- 14Fort DodgeIowa 14.7
- 14Franklin ParkIllinois 14.7
- 14MinneapolisMinnesota 14.7
- 14WaukeshaWisconsin 14.7
- 18MarquetteMichigan 14.5
- 19FontanaCalifornia 14.2
- 20Saint PaulMinnesota 14.1
- 21BridgeviewIllinois 14.0
- 21Jurupa ValleyCalifornia 14.0
- 23BurnsvilleMinnesota 13.8
- 23Eau ClaireWisconsin 13.8
- 25Des PlainesIllinois 13.7
- 25Grand RapidsMichigan 13.7
- 25SteubenvilleOhio 13.7
- 28DetroitMichigan 13.5
- 28BakersfieldCalifornia 13.5
- 30ChicagoIllinois 13.4
- 30Michigan CityIndiana 13.4
- 30Bay CityMichigan 13.4
- 33RiversideCalifornia 13.3
- 34LansingMichigan 13.2
- 34Port HuronMichigan 13.2
- 34RochesterMinnesota 13.2
- 34ShakopeeMinnesota 13.2
- 34South MilwaukeeWisconsin 13.2
- 34BismarckNorth Dakota 13.2
- 40BrookfieldIllinois 13.1
- 40DoltonIllinois 13.1
- 40BlaineMinnesota 13.1
- 40RochesterNew York 13.1
- 40GlendoraCalifornia 13.1
- 45Saint CloudMinnesota 13.0
- 46Saint JosephMissouri 12.9
- 46DearbornMichigan 12.9
- 46LewistonIdaho 12.9
- 49ElginIllinois 12.8
- 49RockfordIllinois 12.8
- 49PortageIndiana 12.8
- 49Ann Arborlow-cost sensorsMichigan 12.8
- 49KalamazooMichigan 12.8
- 54JenisonMichigan 12.7
- 55GaryIndiana 12.6
- 55SouthfieldMichigan 12.6
- 55West FargoNorth Dakota 12.6
- 55Los AngelesCalifornia 12.6
- 59HammondIndiana 12.5
- 59ClevelandOhio 12.5
- 59Santa BarbaraCalifornia 12.5
- 62HollandMichigan 12.4
- 62BurbankCalifornia 12.4
- 64SpringdaleArkansas 12.3
- 64Wake Forestlow-cost sensorsNorth Carolina 12.3
- 64MolineIllinois 12.3
- 64NapervilleIllinois 12.3
- 68Oak LawnIllinois 12.1
- 68ZionIllinois 12.1
- 68AlbanyNew York 12.1
- 68Santa Monicalow-cost sensorsCalifornia 12.1
- 72OlatheKansas 12.0
- 72Calumet CityIllinois 12.0
- 72PeoriaIllinois 12.0
- 72ElkhartIndiana 12.0
- 72Saint MichaelMinnesota 12.0
- 72SyracuseNew York 12.0
- 78TopekaKansas 11.9
- 78HoustonTexas 11.9
- 78AuroraIllinois 11.9
- 78JolietIllinois 11.9
- 78Lincoln ParkMichigan 11.9
- 78MadisonWisconsin 11.9
- 84Kansas CityKansas 11.8
- 84CincinnatiOhio 11.8
- 84Des MoinesIowa 11.8
- 84CaryIllinois 11.8
- 84WarrenOhio 11.8
- 84Agouralow-cost sensorsCalifornia 11.8
- 84Great FallsMontana 11.8
- 91Apple ValleyMinnesota 11.7
- 91EriePennsylvania 11.7
- 93ConroeTexas 11.6
- 93TaylorMichigan 11.6
- 93ToledoOhio 11.6
- 93CorcoranCalifornia 11.6
- 93Hawthornelow-cost sensorsCalifornia 11.6
- 93MillcreekUtah 11.6
- 99TexarkanaTexas 11.5
- 99San DiegoCalifornia 11.5
- 99VictorvilleCalifornia 11.5
- 99Arvadalow-cost sensorsColorado 11.5
- 103Upper AltonIllinois 11.4
- 103East ChicagoIndiana 11.4
- 103El CentroCalifornia 11.4
- 106RedfordMichigan 11.3
- 106ScrantonPennsylvania 11.3
- 106ComptonCalifornia 11.3
- 109CantonOhio 11.1
- 109YoungstownOhio 11.1
- 109IndioCalifornia 11.1
- 109Santa ClaritaCalifornia 11.1
- 109MoscowIdaho 11.1
- 114East Saint LouisIllinois 11.0
- 114PasadenaTexas 11.0
- 114ClintonIowa 11.0
- 114South BendIndiana 11.0
- 114PittsfieldMassachusetts 11.0
- 114EastpointeMichigan 11.0
- 114PowayCalifornia 11.0
- 114La Crescenta-Montroselow-cost sensorsCalifornia 11.0
- 122YpsilantiMichigan 10.9
- 122WestervilleOhio 10.9
- 122Casa GrandeArizona 10.9
- 122Long BeachCalifornia 10.9
- 126Granite CityIllinois 10.8
- 126Ponca CityOklahoma 10.8
- 126TulsaOklahoma 10.8
- 126Carsonlow-cost sensorsCalifornia 10.8
- 126Lake ElsinoreCalifornia 10.8
- 131DerbyKansas 10.7
- 131Cedar RapidsIowa 10.7
- 131BanningCalifornia 10.7
- 131El CajonCalifornia 10.7
- 131PortervilleCalifornia 10.7
- 131Simi ValleyCalifornia 10.7
- 137LafayetteLouisiana 10.6
- 137HartfordConnecticut 10.6
- 137Iowa CityIowa 10.6
- 137Lexingtonlow-cost sensorsMassachusetts 10.6
- 137UticaNew York 10.6
- 137Torrancelow-cost sensorsCalifornia 10.6
- 143SpringfieldIllinois 10.5
- 143DentonTexas 10.5
- 143DavenportIowa 10.5
- 143Fort WayneIndiana 10.5
- 143West MifflinPennsylvania 10.5
- 148Camdenlow-cost sensorsNew Jersey 10.4
- 148Cleveland HeightsOhio 10.4
- 148AnkenyIowa 10.4
- 148SpringfieldMassachusetts 10.4
- 148Shaker HeightsOhio 10.4
- 148Sioux FallsSouth Dakota 10.4
- 148RutlandVermont 10.4
- 148Inglewoodlow-cost sensorsCalifornia 10.4
- 156West MemphisArkansas 10.2
- 156IndianapolisIndiana 10.2
- 156Kansas CityMissouri 10.2
- 156BaytownTexas 10.2
- 156AkronOhio 10.2
- 161DecaturIllinois 10.1
- 161Baton RougeLouisiana 10.1
- 161DanburyConnecticut 10.1
- 161BrookingsSouth Dakota 10.1
- 161Lomitalow-cost sensorsCalifornia 10.1
- 161Northglennlow-cost sensorsColorado 10.1
- 167LexingtonNorth Carolina 10.0
- 167ColumbusOhio 10.0
- 167ElizabethNew Jersey 10.0
- 167PainesvilleOhio 10.0
- 167Abingtonlow-cost sensorsPennsylvania 10.0
- 167PittsburghPennsylvania 10.0
- 167PaysonArizona 10.0
- 167OceansideCalifornia 10.0
- 167BendOregon 10.0
- 176WeirtonWest Virginia 9.9
- 176FillmoreCalifornia 9.9
- 176El PasoTexas 9.9
- 179Little RockArkansas 9.8
- 179Terre HauteIndiana 9.8
- 179Fort WorthTexas 9.8
- 179KeeneNew Hampshire 9.8
- 179Santa PaulaCalifornia 9.8
- 179Thousand OaksCalifornia 9.8
- 179ThorntonColorado 9.8
- 186AnaheimCalifornia 9.7
- 186VisaliaCalifornia 9.7
- 186Brightonlow-cost sensorsColorado 9.7
- 189WichitaKansas 9.6
- 189DallasTexas 9.6
- 189La PorteTexas 9.6
- 189LafayetteIndiana 9.6
- 189AberdeenSouth Dakota 9.6
- 194St. LouisMissouri 9.5
- 194WaterburyConnecticut 9.5
- 194GreenfieldMassachusetts 9.5
- 194BrawleyCalifornia 9.5
- 194West JordanUtah 9.5
- 199JenksOklahoma 9.4
- 199CorsicanaTexas 9.4
- 199HuntingtonWest Virginia 9.4
- 199OmahaNebraska 9.4
- 199New York CityNew York 9.4
- 204OwensboroKentucky 9.3
- 204RaymoreMissouri 9.3
- 204New HavenConnecticut 9.3
- 204BloomingtonIllinois 9.3
- 204HermitagePennsylvania 9.3
- 204WilkinsburgPennsylvania 9.3
- 204HanfordCalifornia 9.3
- 211SaginawTexas 9.2
- 211MuncieIndiana 9.2
- 211MaderaCalifornia 9.2
- 214ArnoldMissouri 9.1
- 214LibertyMissouri 9.1
- 214Missouri CityTexas 9.1
- 214WaterlooIowa 9.1
- 214NorthbrookIllinois 9.1
- 214KokomoIndiana 9.1
- 214HaverhillMassachusetts 9.1
- 214LebanonPennsylvania 9.1
- 214McKeesportPennsylvania 9.1
- 214State CollegePennsylvania 9.1
- 214YumaArizona 9.1
- 214FresnoCalifornia 9.1
- 214PullmanWashington 9.1
- 227SpringfieldMissouri 9.0
- 227PennsaukenNew Jersey 9.0
- 227SewellNew Jersey 9.0
- 227SpringfieldOhio 9.0
- 227McAlesterOklahoma 9.0
- 227Oklahoma CityOklahoma 9.0
- 227Mission BendTexas 9.0
- 227ChampaignIllinois 9.0
- 227LindenNew Jersey 9.0
- 227LimaOhio 9.0
- 227LongmontColorado 9.0
- 227BountifulUtah 9.0
- 239LeawoodKansas 8.9
- 239PortsmouthOhio 8.9
- 239YorkPennsylvania 8.9
- 239CarlislePennsylvania 8.9
- 239TemeculaCalifornia 8.9
- 244JacksonMississippi 8.8
- 244CharlestonWest Virginia 8.8
- 244Jersey CityNew Jersey 8.8
- 244PatersonNew Jersey 8.8
- 244HarrisburgPennsylvania 8.8
- 244Las VegasNevada 8.8
- 244TooeleUtah 8.8
- 251DaytonOhio 8.7
- 251FlorenceSouth Carolina 8.7
- 251BartlettTennessee 8.7
- 251North ChicopeeMassachusetts 8.7
- 251PortlandMaine 8.7
- 251WatertownSouth Dakota 8.7
- 251Fort CollinsColorado 8.7
- 251Spanish ForkUtah 8.7
- 251Moses LakeWashington 8.7
- 260Kendale LakesFlorida 8.6
- 260MaconGeorgia 8.6
- 260MooreOklahoma 8.6
- 260GreeleyColorado 8.6
- 260Salt Lake CityUtah 8.6
- 260RandolphNew Jersey 8.6
- 266PhiladelphiaPennsylvania 8.5
- 266SpartanburgSouth Carolina 8.5
- 266JacksonTennessee 8.5
- 266AustinTexas 8.5
- 266BostonMassachusetts 8.5
- 266LewistonMaine 8.5
- 266LancasterPennsylvania 8.5
- 266OxnardCalifornia 8.5
- 266RichmondCalifornia 8.5
- 266DenverColorado 8.5
- 266OremUtah 8.5
- 266West Valley CityUtah 8.5
- 266Summerlin SouthNevada 8.5
- 279EvansvilleIndiana 8.4
- 279LouisvilleKentucky 8.4
- 279BaltimoreMaryland 8.4
- 279HickoryNorth Carolina 8.4
- 279EdinburgTexas 8.4
- 279LowellMassachusetts 8.4
- 279WorcesterMassachusetts 8.4
- 279Fort LeeNew Jersey 8.4
- 279BerkeleyCalifornia 8.4
- 279EnterpriseNevada 8.4
- 279BoulderColorado 8.4
- 279HermistonOregon 8.4
- 291CharlotteNorth Carolina 8.3
- 291FraminghamMassachusetts 8.3
- 291MedinaOhio 8.3
- 291BensalemPennsylvania 8.3
- 291ClovisCalifornia 8.3
- 291South Lake TahoeCalifornia 8.3
- 291Colorado SpringsColorado 8.3
- 291RedmondOregon 8.3
- 299MiamiFlorida 8.2
- 299ValdostaGeorgia 8.2
- 299JeffersonvilleIndiana 8.2
- 299University CityMissouri 8.2
- 299HernandoMississippi 8.2
- 299North CharlestonSouth Carolina 8.2
- 299BeltonTexas 8.2
- 299La VistaNebraska 8.2
- 299BridgeportConnecticut 8.2
- 299Spring ValleyNevada 8.2
- 299HerrimanUtah 8.2
- 299North OgdenUtah 8.2
- 299SunnysideWashington 8.2
- 312Valley StationKentucky 8.1
- 312New OrleansLouisiana 8.1
- 312EdmondOklahoma 8.1
- 312MissionTexas 8.1
- 312MilfordMassachusetts 8.1
- 312DerryNew Hampshire 8.1
- 312New BrunswickNew Jersey 8.1
- 312San JoseCalifornia 8.1
- 312Lakewoodlow-cost sensorsColorado 8.1
- 321TallahasseeFlorida 8.0
- 321VeniceFlorida 8.0
- 321JasperIndiana 8.0
- 321Winston-SalemNorth Carolina 8.0
- 321Port ArthurTexas 8.0
- 321BrocktonMassachusetts 8.0
- 321ChicoCalifornia 8.0
- 321Rapid CitySouth Dakota 8.0
- 321Brigham CityUtah 8.0
- 330Ponte Vedra BeachFlorida 7.9
- 330SavannahGeorgia 7.9
- 330AshlandKentucky 7.9
- 330Saint AndrewsSouth Carolina 7.9
- 330College StationTexas 7.9
- 330HarrisonburgVirginia 7.9
- 330AndersonIndiana 7.9
- 330PortsmouthNew Hampshire 7.9
- 330DublinOhio 7.9
- 330PhoenixArizona 7.9
- 330LancasterCalifornia 7.9
- 330Coeur d'AleneIdaho 7.9
- 330HighlandUtah 7.9
- 343PaducahKentucky 7.8
- 343GreenvilleSouth Carolina 7.8
- 343LompocCalifornia 7.8
- 343OdessaTexas 7.8
- 343WindsorColorado 7.8
- 343RexburgIdaho 7.8
- 343AnacortesWashington 7.8
- 350WashingtonDistrict of Columbia 7.7
- 350Bonita SpringsFlorida 7.7
- 350OcalaFlorida 7.7
- 350KennerLouisiana 7.7
- 350BrownsvilleTexas 7.7
- 350San AntonioTexas 7.7
- 350BellevueNebraska 7.7
- 350BayonneNew Jersey 7.7
- 350HolbrookNew York 7.7
- 350NewburghNew York 7.7
- 350NorristownPennsylvania 7.7
- 350NampaIdaho 7.7
- 362GadsdenAlabama 7.6
- 362AugustaGeorgia 7.6
- 362Warner RobinsGeorgia 7.6
- 362JeffersontownKentucky 7.6
- 362ClemmonsNorth Carolina 7.6
- 362LawtonOklahoma 7.6
- 362RoanokeVirginia 7.6
- 362MuscatineIowa 7.6
- 362LynnMassachusetts 7.6
- 362TrentonNew Jersey 7.6
- 362TempeArizona 7.6
- 362Grand JunctionColorado 7.6
- 362PuebloColorado 7.6
- 362HendersonNevada 7.6
- 362Cedar CityUtah 7.6
- 377PrichardAlabama 7.5
- 377WilmingtonDelaware 7.5
- 377EdgewoodMaryland 7.5
- 377RaleighNorth Carolina 7.5
- 377Toms RiverNew Jersey 7.5
- 377Corpus ChristiTexas 7.5
- 377CharlottesvilleVirginia 7.5
- 377QuincyMassachusetts 7.5
- 377EwingNew Jersey 7.5
- 377WoodlandCalifornia 7.5
- 377PocatelloIdaho 7.5
- 377MidwayFlorida 7.5
- 389MontgomeryAlabama 7.4
- 389FishersIndiana 7.4
- 389Saint MatthewsKentucky 7.4
- 389FayettevilleNorth Carolina 7.4
- 389Roanoke RapidsNorth Carolina 7.4
- 389ChesterPennsylvania 7.4
- 389Cedar ParkTexas 7.4
- 389AshburnVirginia 7.4
- 389ChesapeakeVirginia 7.4
- 389ProvidenceRhode Island 7.4
- 389HobbsNew Mexico 7.4
- 389Idaho FallsIdaho 7.4
- 389MeridianIdaho 7.4
- 389AuburnWashington 7.4
- 389SpokaneWashington 7.4
- 389Candler-McAfeeGeorgia 7.4
- 405BirminghamAlabama 7.3
- 405Fort SmithArkansas 7.3
- 405BloomingtonIndiana 7.3
- 405HattiesburgMississippi 7.3
- 405ClaytonNorth Carolina 7.3
- 405AugustaMaine 7.3
- 405GahannaOhio 7.3
- 405Goletalow-cost sensorsCalifornia 7.3
- 405Cañon CityColorado 7.3
- 405MagnaUtah 7.3
- 405WenatcheeWashington 7.3
- 405Picnic Point-North LynnwoodWashington 7.3
- 417DoverDelaware 7.2
- 417Fort LauderdaleFlorida 7.2
- 417AtlantaGeorgia 7.2
- 417Atlantic CityNew Jersey 7.2
- 417South VinelandNew Jersey 7.2
- 417ChattanoogaTennessee 7.2
- 417NashvilleTennessee 7.2
- 417LincolnNebraska 7.2
- 417PawtucketRhode Island 7.2
- 417San Luis ObispoCalifornia 7.2
- 417Ken CarylColorado 7.2
- 417Walla WallaWashington 7.2
- 429Ferry PassFlorida 7.1
- 429GainesvilleGeorgia 7.1
- 429SulphurLouisiana 7.1
- 429PascagoulaMississippi 7.1
- 429DyersburgTennessee 7.1
- 429GalvestonTexas 7.1
- 429San MarcosTexas 7.1
- 429RichmondVirginia 7.1
- 429New CityNew York 7.1
- 429MesaArizona 7.1
- 429Dodge CityKansas 7.1
- 429Eagle PassTexas 7.1
- 429BoiseIdaho 7.1
- 442FairhopeAlabama 7.0
- 442ScaggsvilleMaryland 7.0
- 442MorrisvilleNorth Carolina 7.0
- 442KnoxvilleTennessee 7.0
- 442SpringfieldVirginia 7.0
- 442TucsonArizona 7.0
- 442SocorroTexas 7.0
- 442ButteMontana 7.0
- 442PendletonOregon 7.0
- 442Spokane ValleyWashington 7.0
- 442YakimaWashington 7.0
- 453BearDelaware 6.9
- 453ChalmetteLouisiana 6.9
- 453GulfportMississippi 6.9
- 453PleasantvilleNew Jersey 6.9
- 453LaredoTexas 6.9
- 453Oxon Hill-GlassmanorMaryland 6.9
- 453Inglewood-Finn Hilllow-cost sensorsWashington 6.9
- 460HuntsvilleAlabama 6.8
- 460NewarkDelaware 6.8
- 460New AlbanyIndiana 6.8
- 460Fort ThomasKentucky 6.8
- 460Hunt ValleyMaryland 6.8
- 460GreensboroNorth Carolina 6.8
- 460HendersonvilleTennessee 6.8
- 460New LondonConnecticut 6.8
- 460Fall RiverMassachusetts 6.8
- 460White PlainsNew York 6.8
- 460FlagstaffArizona 6.8
- 460GlendaleArizona 6.8
- 460Arroyo GrandeCalifornia 6.8
- 460Twin FallsIdaho 6.8
- 460BillingsMontana 6.8
- 460MedfordOregon 6.8
- 460EllensburgWashington 6.8
- 460SeattleWashington 6.8
- 478ShreveportLouisiana 6.7
- 478ClarksvilleTennessee 6.7
- 478KingsportTennessee 6.7
- 478Rose HillVirginia 6.7
- 478Short PumpVirginia 6.7
- 478Sunland ParkNew Mexico 6.7
- 478RenoNevada 6.7
- 478HurricaneUtah 6.7
- 478Apache JunctionArizona 6.7
- 487HomesteadFlorida 6.6
- 487ColumbusIndiana 6.6
- 487AshevilleNorth Carolina 6.6
- 487East RidgeTennessee 6.6
- 487OaklandCalifornia 6.6
- 487AlbuquerqueNew Mexico 6.6
- 487Boulder CityNevada 6.6
- 494GreenvilleNorth Carolina 6.5
- 494BangorMaine 6.5
- 494LaconiaNew Hampshire 6.5
- 494LincolnCalifornia 6.5
- 494MercedCalifornia 6.5
- 494VallejoCalifornia 6.5
- 494Yuba CityCalifornia 6.5
- 494TacomaWashington 6.5
- 502Delray BeachFlorida 6.4
- 502AthensGeorgia 6.4
- 502ElizabethtownKentucky 6.4
- 502ElktonMaryland 6.4
- 502LebanonOhio 6.4
- 502HopewellVirginia 6.4
- 502NipomoCalifornia 6.4
- 502StocktonCalifornia 6.4
- 502TurlockCalifornia 6.4
- 502ReddingCalifornia 6.4
- 502The DallesOregon 6.4
- 513DecaturAlabama 6.3
- 513MaryvilleTennessee 6.3
- 513DavisCalifornia 6.3
- 513Prunedalelow-cost sensorsCalifornia 6.3
- 513San LeandroCalifornia 6.3
- 513CondaIdaho 6.3
- 513MissoulaMontana 6.3
- 520Fruit CoveFlorida 6.2
- 520FolsomCalifornia 6.2
- 520Live Oaklow-cost sensorsCalifornia 6.2
- 520TracyCalifornia 6.2
- 520LubbockTexas 6.2
- 525BessemerAlabama 6.1
- 525Deerfield BeachFlorida 6.1
- 525St. PetersburgFlorida 6.1
- 525ValricoFlorida 6.1
- 525McDonoughGeorgia 6.1
- 525Lexington-FayetteKentucky 6.1
- 525NicholasvilleKentucky 6.1
- 525ConwaySouth Carolina 6.1
- 525GaltCalifornia 6.1
- 525RosevilleCalifornia 6.1
- 525HelenaMontana 6.1
- 525AltamontOregon 6.1
- 525BellinghamWashington 6.1
- 525ShorelineWashington 6.1
- 539DavieFlorida 6.0
- 539AlbanyGeorgia 6.0
- 539HagerstownMaryland 6.0
- 539Live OakTexas 6.0
- 539East HamptonVirginia 6.0
- 539ParadiseCalifornia 6.0
- 539Watsonvillelow-cost sensorsCalifornia 6.0
- 546TrussvilleAlabama 5.9
- 546GainesvilleFlorida 5.9
- 546LawrencevilleGeorgia 5.9
- 546Casas AdobesArizona 5.9
- 546Rio RanchoNew Mexico 5.9
- 546AshlandOregon 5.9
- 546TigardOregon 5.9
- 546LaramieWyoming 5.9
- 554West PensacolaFlorida 5.8
- 554ColumbiaTennessee 5.8
- 554SalinasCalifornia 5.8
- 554TruckeeCalifornia 5.8
- 554VacavilleCalifornia 5.8
- 554Rock SpringsWyoming 5.8
- 560TampaFlorida 5.7
- 561Palm CityFlorida 5.6
- 561WestonFlorida 5.6
- 561BrunswickGeorgia 5.6
- 561ColumbusGeorgia 5.6
- 561CookevilleTennessee 5.6
- 566HueytownAlabama 5.5
- 566JacksonvilleFlorida 5.5
- 566Oak RidgeFlorida 5.5
- 566White OakOhio 5.5
- 566Florinlow-cost sensorsCalifornia 5.5
- 566GilroyCalifornia 5.5
- 566HollisterCalifornia 5.5
- 566MantecaCalifornia 5.5
- 566PleasantonCalifornia 5.5
- 566South San Franciscolow-cost sensorsCalifornia 5.5
- 566LittletonColorado 5.5
- 566Arden-ArcadeCalifornia 5.5
- 578SarasotaFlorida 5.4
- 578ModestoCalifornia 5.4
- 578BremertonWashington 5.4
- 581WellingtonFlorida 5.3
- 581RockvilleMaryland 5.3
- 581South LaurelMaryland 5.3
- 581MaranaArizona 5.3
- 581Palo Altolow-cost sensorsCalifornia 5.3
- 581Seasidelow-cost sensorsCalifornia 5.3
- 581MesquiteNevada 5.3
- 581BellevueWashington 5.3
- 581Four CornersFlorida 5.3
- 590Belle GladeFlorida 5.2
- 590Coconut CreekFlorida 5.2
- 590Safety HarborFlorida 5.2
- 590San FranciscoCalifornia 5.2
- 590Windsorlow-cost sensorsCalifornia 5.2
- 590Las CrucesNew Mexico 5.2
- 590CanbyOregon 5.2
- 590EugeneOregon 5.2
- 590RentonWashington 5.2
- 590Salmon CreekWashington 5.2
- 590CasperWyoming 5.2
- 601Daytona BeachFlorida 5.1
- 601RidgecrestCalifornia 5.1
- 601Grants PassOregon 5.1
- 601HillsboroOregon 5.1
- 605East LakeFlorida 5.0
- 605Fort MyersFlorida 5.0
- 605CoventryRhode Island 5.0
- 608OrlandoFlorida 4.9
- 608OrcuttCalifornia 4.9
- 608Spanish SpringsNevada 4.9
- 608BurienWashington 4.9
- 608GilletteWyoming 4.9
- 613MartinezCalifornia 4.8
- 613UkiahCalifornia 4.8
- 613GreshamOregon 4.8
- 613Port AngelesWashington 4.8
- 613SheridanWyoming 4.8
- 618MasonOhio 4.7
- 618Green ValleyArizona 4.7
- 618AlbanyOregon 4.7
- 621Lake MaryFlorida 4.6
- 621Winter ParkFlorida 4.6
- 621LemayMissouri 4.6
- 621DurhamNorth Carolina 4.6
- 621Santa CruzCalifornia 4.6
- 621PortlandOregon 4.6
- 621LongviewWashington 4.6
- 628Redwood CityCalifornia 4.5
- 628Carson CityNevada 4.5
- 630BeavertonOregon 4.4
- 630Oregon CityOregon 4.4
- 630CheyenneWyoming 4.4
- 633SalemOregon 4.3
- 634MilwaukieOregon 4.2
- 634VancouverWashington 4.2
- 636Palm BayFlorida 4.1
- 636AberdeenWashington 4.1
- 638SacramentoCalifornia 4.0
- 638San RafaelCalifornia 4.0
- 638ParklandWashington 4.0
- 641ConcordCalifornia 3.9
- 641RoseburgOregon 3.9
- 643HiloHawaii 3.8
- 644KīheiHawaii 3.7
- 644FairbanksAlaska 3.7
- 644BadgerAlaska 3.7
- 644Makakilo / Kapolei / Honokai HaleHawaii 3.7
- 648HonoluluHawaii 3.6
- 649KahuluiHawaii 3.5
- 650AtascaderoCalifornia 3.4
- 650WoodburnOregon 3.4
- 652LivermoreCalifornia 3.2
- 652McMinnvilleOregon 3.2
- 652LaceyWashington 3.2
- 652Mount VernonWashington 3.2
- 656DallasOregon 3.1
- 657Coos BayOregon 3.0
- 658Oak HarborWashington 2.8
- 659Forest GroveOregon 2.7
- 660Santa RosaCalifornia 2.4
- 661AnchorageAlaska 1.9
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, August 2025 · United States now
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SmogRank, most polluted cities in United States, PM2.5, August 2025, smogrank.com/us/history/2025-08 (accessed 2 Oct 2026).
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