SmogRank / World / United States / April 2026
Most polluted cities in United States, April 2026
665 cities in United States ranked by their average PM2.5 over the 30 days. Worst: Calexico at 18.9 µg/m³, #422 of 2,573 cities in the world. Cleanest: Encinitas at 1.4. A city needs measurements on 70% of the days to be ranked.
← Calexico 18.9
- 1CalexicoCalifornia 18.9
- 2LaredoTexas 15.8
- 3MaconGeorgia 15.3
- 4El PasoTexas 14.7
- 5ValdostaGeorgia 13.2
- 5Eagle PassTexas 13.2
- 7Corpus ChristiTexas 13.0
- 7Port ArthurTexas 13.0
- 9MissionTexas 12.5
- 10LibertyMissouri 12.2
- 11AugustaGeorgia 12.1
- 11Jurupa ValleyCalifornia 12.1
- 13AustinTexas 12.0
- 14SavannahGeorgia 11.8
- 15BrunswickGeorgia 11.7
- 15San AntonioTexas 11.7
- 17EdinburgTexas 11.5
- 18BaytownTexas 11.4
- 19Deer ParkTexas 11.2
- 20Wake Forestlow-cost sensorsNorth Carolina 11.0
- 21Warner RobinsGeorgia 10.9
- 22ColumbusGeorgia 10.7
- 22BrownsvilleTexas 10.7
- 22Live OakTexas 10.7
- 22BrookfieldIllinois 10.7
- 26Redmondlow-cost sensorsWashington 10.6
- 27Candler-McAfeeGeorgia 10.5
- 28West MemphisArkansas 10.4
- 29PortsmouthOhio 10.3
- 30DallasTexas 10.2
- 31ChattanoogaTennessee 10.1
- 31RiversideCalifornia 10.1
- 33Little RockArkansas 9.8
- 33TopekaKansas 9.8
- 33WichitaKansas 9.8
- 33SpartanburgSouth Carolina 9.8
- 33HoustonTexas 9.8
- 38ShreveportLouisiana 9.7
- 38FayettevilleNorth Carolina 9.7
- 38FlorenceSouth Carolina 9.7
- 38San MarcosTexas 9.7
- 42AthensGeorgia 9.6
- 42College StationTexas 9.6
- 42Fort WorthTexas 9.6
- 45AlbanyGeorgia 9.5
- 45PhiladelphiaPennsylvania 9.5
- 47BirminghamAlabama 9.3
- 47GadsdenAlabama 9.3
- 47AshlandKentucky 9.3
- 50MiddletownOhio 9.2
- 50CorsicanaTexas 9.2
- 50PasadenaTexas 9.2
- 50Sunland ParkNew Mexico 9.2
- 54BeltonTexas 9.0
- 54DentonTexas 9.0
- 56TallahasseeFlorida 8.9
- 56AtlantaGeorgia 8.9
- 56DerbyKansas 8.9
- 56HattiesburgMississippi 8.9
- 56Saint AndrewsSouth Carolina 8.9
- 56Cedar ParkTexas 8.9
- 56TaylorTexas 8.9
- 56TexarkanaTexas 8.9
- 56WaterlooIowa 8.9
- 65SpringdaleArkansas 8.8
- 65JacksonMississippi 8.8
- 67ConroeTexas 8.7
- 67SaginawTexas 8.7
- 69Ponte Vedra BeachFlorida 8.6
- 69LouisvilleKentucky 8.6
- 69MorrisvilleNorth Carolina 8.6
- 69PflugervilleTexas 8.6
- 69WyomingMichigan 8.6
- 69SocorroTexas 8.6
- 75TulsaOklahoma 8.5
- 75North CharlestonSouth Carolina 8.5
- 77HuntsvilleAlabama 8.4
- 77LawrencevilleGeorgia 8.4
- 77JeffersonvilleIndiana 8.4
- 77CharlotteNorth Carolina 8.4
- 77NorwoodOhio 8.4
- 77GreenvilleSouth Carolina 8.4
- 77East RidgeTennessee 8.4
- 77GalvestonTexas 8.4
- 77CharlottesvilleVirginia 8.4
- 86JacksonvilleFlorida 8.3
- 86Valley StationKentucky 8.3
- 86LexingtonNorth Carolina 8.3
- 86Oklahoma CityOklahoma 8.3
- 86HendersonvilleTennessee 8.3
- 86KnoxvilleTennessee 8.3
- 86BrookingsSouth Dakota 8.3
- 93MontgomeryAlabama 8.2
- 93MooreOklahoma 8.2
- 93YorkPennsylvania 8.2
- 93MaryvilleTennessee 8.2
- 93ComptonCalifornia 8.2
- 93FontanaCalifornia 8.2
- 99OcalaFlorida 8.1
- 99OwensboroKentucky 8.1
- 99RaleighNorth Carolina 8.1
- 99Missouri CityTexas 8.1
- 99TucsonArizona 8.1
- 99WhittierCalifornia 8.1
- 99Great FallsMontana 8.1
- 99MidwayFlorida 8.1
- 107ColumbiaTennessee 8.0
- 107WestervilleOhio 8.0
- 109Kendale LakesFlorida 7.9
- 109Baton RougeLouisiana 7.9
- 109ClaytonNorth Carolina 7.9
- 109Winston-SalemNorth Carolina 7.9
- 109CharlestonWest Virginia 7.9
- 114DecaturAlabama 7.8
- 114Granite CityIllinois 7.8
- 114EvansvilleIndiana 7.8
- 114New AlbanyIndiana 7.8
- 114SulphurLouisiana 7.8
- 114BartlettTennessee 7.8
- 114La PorteTexas 7.8
- 121TrussvilleAlabama 7.7
- 121MonroeLouisiana 7.7
- 121BaltimoreMaryland 7.7
- 121Mission BendTexas 7.7
- 121MankatoMinnesota 7.7
- 126BessemerAlabama 7.6
- 126PrichardAlabama 7.6
- 126Ponca CityOklahoma 7.6
- 126PeoriaIllinois 7.6
- 126ToledoOhio 7.6
- 126BakersfieldCalifornia 7.6
- 126VisaliaCalifornia 7.6
- 133VeniceFlorida 7.5
- 133IndianapolisIndiana 7.5
- 133Saint JosephMissouri 7.5
- 133GreenvilleNorth Carolina 7.5
- 133MasonOhio 7.5
- 133JacksonTennessee 7.5
- 133MuscatineIowa 7.5
- 133DoltonIllinois 7.5
- 133HammondIndiana 7.5
- 133LancasterPennsylvania 7.5
- 133LebanonPennsylvania 7.5
- 133AnaheimCalifornia 7.5
- 133Los AngelesCalifornia 7.5
- 146ChesapeakeVirginia 7.4
- 146HarrisonburgVirginia 7.4
- 146HuntingtonWest Virginia 7.4
- 146Calumet CityIllinois 7.4
- 146ClevelandOhio 7.4
- 146SteubenvilleOhio 7.4
- 152McDonoughGeorgia 7.3
- 152HernandoMississippi 7.3
- 152ClemmonsNorth Carolina 7.3
- 152CincinnatiOhio 7.3
- 152ColumbusOhio 7.3
- 152SpringfieldOhio 7.3
- 152Fort WayneIndiana 7.3
- 152PerrysburgOhio 7.3
- 152West MifflinPennsylvania 7.3
- 152Long BeachCalifornia 7.3
- 162Ferry PassFlorida 7.2
- 162MiamiFlorida 7.2
- 162GreensboroNorth Carolina 7.2
- 162HickoryNorth Carolina 7.2
- 162EdmondOklahoma 7.2
- 162JenksOklahoma 7.2
- 162BridgeviewIllinois 7.2
- 162RedfordMichigan 7.2
- 162OregonOhio 7.2
- 171Bonita SpringsFlorida 7.1
- 171Fort LauderdaleFlorida 7.1
- 171Fruit CoveFlorida 7.1
- 171Palm CityFlorida 7.1
- 171GainesvilleGeorgia 7.1
- 171JeffersontownKentucky 7.1
- 171Saint MatthewsKentucky 7.1
- 171New OrleansLouisiana 7.1
- 171DaytonOhio 7.1
- 171Franklin ParkIllinois 7.1
- 171BensalemPennsylvania 7.1
- 182GainesvilleFlorida 7.0
- 182TampaFlorida 7.0
- 182ValricoFlorida 7.0
- 182AshevilleNorth Carolina 7.0
- 182LawtonOklahoma 7.0
- 182DyersburgTennessee 7.0
- 182FlintMichigan 7.0
- 182NipomoCalifornia 7.0
- 182San DiegoCalifornia 7.0
- 182HobbsNew Mexico 7.0
- 192Belle GladeFlorida 6.9
- 192West PensacolaFlorida 6.9
- 192GulfportMississippi 6.9
- 192Roanoke RapidsNorth Carolina 6.9
- 192CookevilleTennessee 6.9
- 192Evanstonlow-cost sensorsIllinois 6.9
- 192PhoenixArizona 6.9
- 192Picnic Point-North LynnwoodWashington 6.9
- 200St. PetersburgFlorida 6.8
- 200BloomingtonIndiana 6.8
- 200ElizabethtownKentucky 6.8
- 200EssexMaryland 6.8
- 200PascagoulaMississippi 6.8
- 200Toms RiverNew Jersey 6.8
- 200LebanonOhio 6.8
- 200McAlesterOklahoma 6.8
- 200Fort DodgeIowa 6.8
- 200EwingNew Jersey 6.8
- 200Chula VistaCalifornia 6.8
- 200Lake ElsinoreCalifornia 6.8
- 200MercedCalifornia 6.8
- 200OdessaTexas 6.8
- 214WashingtonDistrict of Columbia 6.7
- 214Oak RidgeFlorida 6.7
- 214Pompano BeachFlorida 6.7
- 214NicholasvilleKentucky 6.7
- 214ClarksvilleTennessee 6.7
- 214ReadingPennsylvania 6.7
- 214WatertownSouth Dakota 6.7
- 221HomesteadFlorida 6.6
- 221JasperIndiana 6.6
- 221PennsaukenNew Jersey 6.6
- 221East HamptonVirginia 6.6
- 221HopewellVirginia 6.6
- 221ClintonIowa 6.6
- 221Des PlainesIllinois 6.6
- 221HarrisburgPennsylvania 6.6
- 221Casas AdobesArizona 6.6
- 221NogalesArizona 6.6
- 221IndioCalifornia 6.6
- 221PortervilleCalifornia 6.6
- 233PaducahKentucky 6.5
- 233Fort MyersFlorida 6.5
- 233OlatheKansas 6.5
- 233Lexington-FayetteKentucky 6.5
- 233ChalmetteLouisiana 6.5
- 233KennerLouisiana 6.5
- 233SpringfieldMissouri 6.5
- 233DurhamNorth Carolina 6.5
- 233ConwaySouth Carolina 6.5
- 233RichmondVirginia 6.5
- 233Elmwood ParkIllinois 6.5
- 233AndersonIndiana 6.5
- 233East ChicagoIndiana 6.5
- 233ElkhartIndiana 6.5
- 233LafayetteIndiana 6.5
- 233Royal Oaklow-cost sensorsMichigan 6.5
- 233New York CityNew York 6.5
- 233OaklandCalifornia 6.5
- 251Fort SmithArkansas 6.4
- 251East Saint LouisIllinois 6.4
- 251Upper AltonIllinois 6.4
- 251LafayetteLouisiana 6.4
- 251Atlantic CityNew Jersey 6.4
- 251RoanokeVirginia 6.4
- 251Short PumpVirginia 6.4
- 251JolietIllinois 6.4
- 251MuncieIndiana 6.4
- 251South BendIndiana 6.4
- 251CarlislePennsylvania 6.4
- 251Arroyo GrandeCalifornia 6.4
- 251CorcoranCalifornia 6.4
- 251Mission ViejoCalifornia 6.4
- 265WilmingtonDelaware 6.3
- 265Daytona BeachFlorida 6.3
- 265Safety HarborFlorida 6.3
- 265Columbialow-cost sensorsMissouri 6.3
- 265St. LouisMissouri 6.3
- 265SalemVirginia 6.3
- 265ChicagoIllinois 6.3
- 265ElizabethNew Jersey 6.3
- 265CantonOhio 6.3
- 265DublinOhio 6.3
- 265WarrenOhio 6.3
- 265VictorvilleCalifornia 6.3
- 265Columbia CityWashington 6.3
- 278SarasotaFlorida 6.2
- 278SpringfieldVirginia 6.2
- 278Oak LawnIllinois 6.2
- 278PortageIndiana 6.2
- 278DearbornMichigan 6.2
- 278DetroitMichigan 6.2
- 278HolbrookNew York 6.2
- 278Casa GrandeArizona 6.2
- 278PowayCalifornia 6.2
- 278San FranciscoCalifornia 6.2
- 278Santa BarbaraCalifornia 6.2
- 278Apache JunctionArizona 6.2
- 278SeattleWashington 6.2
- 278Four CornersFlorida 6.2
- 292Deerfield BeachFlorida 6.1
- 292Delray BeachFlorida 6.1
- 292OrlandoFlorida 6.1
- 292DecaturIllinois 6.1
- 292Kansas CityKansas 6.1
- 292South VinelandNew Jersey 6.1
- 292KingsportTennessee 6.1
- 292Cleveland HeightsOhio 6.1
- 292New HavenConnecticut 6.1
- 292AuroraIllinois 6.1
- 292ChampaignIllinois 6.1
- 292NapervilleIllinois 6.1
- 292Michigan CityIndiana 6.1
- 292Lincoln ParkMichigan 6.1
- 292Jersey CityNew Jersey 6.1
- 292BuffaloNew York 6.1
- 292PittsburghPennsylvania 6.1
- 292YumaArizona 6.1
- 292BrawleyCalifornia 6.1
- 292San Luis ObispoCalifornia 6.1
- 292LewistonIdaho 6.1
- 313Hunt ValleyMaryland 6.0
- 313AshburnVirginia 6.0
- 313AnkenyIowa 6.0
- 313ElginIllinois 6.0
- 313Fort LeeNew Jersey 6.0
- 313WilkinsburgPennsylvania 6.0
- 313Oconomowoclow-cost sensorsWisconsin 6.0
- 313BridgeportConnecticut 6.0
- 313TempeArizona 6.0
- 313Delanolow-cost sensorsCalifornia 6.0
- 313El CajonCalifornia 6.0
- 313OceansideCalifornia 6.0
- 313South Lake TahoeCalifornia 6.0
- 313UkiahCalifornia 6.0
- 327Fort ThomasKentucky 5.9
- 327White OakOhio 5.9
- 327Rose HillVirginia 5.9
- 327RockfordIllinois 5.9
- 327BrocktonMassachusetts 5.9
- 327KalamazooMichigan 5.9
- 327LindenNew Jersey 5.9
- 327PatersonNew Jersey 5.9
- 327WeirtonWest Virginia 5.9
- 327BurbankCalifornia 5.9
- 327TacomaWashington 5.9
- 338East LakeFlorida 5.8
- 338WellingtonFlorida 5.8
- 338Des MoinesIowa 5.8
- 338AkronOhio 5.8
- 338MedinaOhio 5.8
- 338YoungstownOhio 5.8
- 338NorristownPennsylvania 5.8
- 338El CentroCalifornia 5.8
- 338FresnoCalifornia 5.8
- 338SalinasCalifornia 5.8
- 338Santa ClaritaCalifornia 5.8
- 338WoodlandCalifornia 5.8
- 338BendOregon 5.8
- 351DavieFlorida 5.7
- 351ArnoldMissouri 5.7
- 351University CityMissouri 5.7
- 351ChesterPennsylvania 5.7
- 351DavenportIowa 5.7
- 351MolineIllinois 5.7
- 351Bay CityMichigan 5.7
- 351PainesvilleOhio 5.7
- 351Shaker HeightsOhio 5.7
- 351ClovisCalifornia 5.7
- 351Santa CruzCalifornia 5.7
- 351NampaIdaho 5.7
- 363Palm BayFlorida 5.6
- 363PleasantvilleNew Jersey 5.6
- 363SewellNew Jersey 5.6
- 363Iowa CityIowa 5.6
- 363FraminghamMassachusetts 5.6
- 363Grand RapidsMichigan 5.6
- 363MinneapolisMinnesota 5.6
- 363McKeesportPennsylvania 5.6
- 363MesaArizona 5.6
- 363San JoseCalifornia 5.6
- 363Simi ValleyCalifornia 5.6
- 363StocktonCalifornia 5.6
- 363ThorntonColorado 5.6
- 363RandolphNew Jersey 5.6
- 377BearDelaware 5.5
- 377SpringfieldIllinois 5.5
- 377ScaggsvilleMaryland 5.5
- 377RaymoreMissouri 5.5
- 377New LondonConnecticut 5.5
- 377BloomingtonIllinois 5.5
- 377PortlandMaine 5.5
- 377BurnsvilleMinnesota 5.5
- 377RochesterMinnesota 5.5
- 377JohnstownPennsylvania 5.5
- 377State CollegePennsylvania 5.5
- 377MilwaukeeWisconsin 5.5
- 377MillcreekUtah 5.5
- 377BellinghamWashington 5.5
- 377Arden-ArcadeCalifornia 5.5
- 392Lake MaryFlorida 5.4
- 392Cedar RapidsIowa 5.4
- 392GaryIndiana 5.4
- 392JenisonMichigan 5.4
- 392AllentownPennsylvania 5.4
- 392ScrantonPennsylvania 5.4
- 392SuperiorWisconsin 5.4
- 392PaysonArizona 5.4
- 392DavisCalifornia 5.4
- 392San LeandroCalifornia 5.4
- 392Coeur d'AleneIdaho 5.4
- 392RentonWashington 5.4
- 404BostonMassachusetts 5.3
- 404Fall RiverMassachusetts 5.3
- 404LynnMassachusetts 5.3
- 404SouthfieldMichigan 5.3
- 404EriePennsylvania 5.3
- 404Upper Saint ClairPennsylvania 5.3
- 404BanningCalifornia 5.3
- 404TemeculaCalifornia 5.3
- 404BozemanMontana 5.3
- 413FairhopeAlabama 5.2
- 413Coconut CreekFlorida 5.2
- 413LeawoodKansas 5.2
- 413ElktonMaryland 5.2
- 413EastpointeMichigan 5.2
- 413YpsilantiMichigan 5.2
- 413ShakopeeMinnesota 5.2
- 413LincolnNebraska 5.2
- 413BethlehemPennsylvania 5.2
- 413WaukeshaWisconsin 5.2
- 413AtascaderoCalifornia 5.2
- 413GlendoraCalifornia 5.2
- 413LaceyWashington 5.2
- 413VancouverWashington 5.2
- 427EdgewoodMaryland 5.1
- 427LemayMissouri 5.1
- 427HaverhillMassachusetts 5.1
- 427TaylorMichigan 5.1
- 427Apple ValleyMinnesota 5.1
- 427Saint PaulMinnesota 5.1
- 427HermitagePennsylvania 5.1
- 427Weirton HeightsWest Virginia 5.1
- 427Santa RosaCalifornia 5.1
- 427Fort CollinsColorado 5.1
- 427OremUtah 5.1
- 427YakimaWashington 5.1
- 439NewarkDelaware 5.0
- 439Kansas CityMissouri 5.0
- 439HartfordConnecticut 5.0
- 439TrentonNew Jersey 5.0
- 439MadisonWisconsin 5.0
- 439FillmoreCalifornia 5.0
- 439GlendaleArizona 5.0
- 439MaranaArizona 5.0
- 439HanfordCalifornia 5.0
- 439DenverColorado 5.0
- 439GreeleyColorado 5.0
- 439LongmontColorado 5.0
- 439West JordanUtah 5.0
- 439AuburnWashington 5.0
- 453DanburyConnecticut 4.9
- 453CaryIllinois 4.9
- 453QuincyMassachusetts 4.9
- 453SpringfieldMassachusetts 4.9
- 453Port HuronMichigan 4.9
- 453BayonneNew Jersey 4.9
- 453AltoonaPennsylvania 4.9
- 453RutlandVermont 4.9
- 453South MilwaukeeWisconsin 4.9
- 453LivermoreCalifornia 4.9
- 453Santa Monicalow-cost sensorsCalifornia 4.9
- 453Las CrucesNew Mexico 4.9
- 453Grants PassOregon 4.9
- 453Oxon Hill-GlassmanorMaryland 4.9
- 467WaterburyConnecticut 4.8
- 467LansingMichigan 4.8
- 467TurlockCalifornia 4.8
- 467RenoNevada 4.8
- 467AmarilloTexas 4.8
- 467LubbockTexas 4.8
- 467HighlandUtah 4.8
- 474RockvilleMaryland 4.7
- 474South LaurelMaryland 4.7
- 474LowellMassachusetts 4.7
- 474WorcesterMassachusetts 4.7
- 474BlaineMinnesota 4.7
- 474ProvidenceRhode Island 4.7
- 474Dodge CityKansas 4.7
- 474SunnysideWashington 4.7
- 474WenatcheeWashington 4.7
- 474FairbanksAlaska 4.7
- 484NorthbrookIllinois 4.6
- 484ZionIllinois 4.6
- 484DuluthMinnesota 4.6
- 484New BrunswickNew Jersey 4.6
- 484AppletonWisconsin 4.6
- 484BerkeleyCalifornia 4.6
- 484LancasterCalifornia 4.6
- 484ReddingCalifornia 4.6
- 484TigardOregon 4.6
- 484West Valley CityUtah 4.6
- 484SpokaneWashington 4.6
- 495PortsmouthNew Hampshire 4.5
- 495RochesterNew York 4.5
- 495Eau ClaireWisconsin 4.5
- 495MaderaCalifornia 4.5
- 495MantecaCalifornia 4.5
- 495RosevilleCalifornia 4.5
- 501Saint CloudMinnesota 4.4
- 501Saint MichaelMinnesota 4.4
- 501OmahaNebraska 4.4
- 501NewburghNew York 4.4
- 501GahannaOhio 4.4
- 501SacramentoCalifornia 4.4
- 501Tularelow-cost sensorsCalifornia 4.4
- 501Colorado SpringsColorado 4.4
- 501Spanish SpringsNevada 4.4
- 501HillsboroOregon 4.4
- 501SalemOregon 4.4
- 501EllensburgWashington 4.4
- 501ShorelineWashington 4.4
- 501Spokane ValleyWashington 4.4
- 501Tri-CitiesWashington 4.4
- 516GilroyCalifornia 4.3
- 516OxnardCalifornia 4.3
- 516Thousand OaksCalifornia 4.3
- 516ButteMontana 4.3
- 516Coos BayOregon 4.3
- 516Salt Lake CityUtah 4.3
- 516Spanish ForkUtah 4.3
- 516BremertonWashington 4.3
- 516BurienWashington 4.3
- 516BadgerAlaska 4.3
- 526MilfordMassachusetts 4.2
- 526West FargoNorth Dakota 4.2
- 526Green BayWisconsin 4.2
- 526GaltCalifornia 4.2
- 526HollisterCalifornia 4.2
- 526PleasantonCalifornia 4.2
- 526San RafaelCalifornia 4.2
- 526Arvadalow-cost sensorsColorado 4.2
- 526MoscowIdaho 4.2
- 526AltamontOregon 4.2
- 536GreenfieldMassachusetts 4.1
- 536AlbanyNew York 4.1
- 536Ken CarylColorado 4.1
- 536Rio RanchoNew Mexico 4.1
- 536Cedar CityUtah 4.1
- 536Moses LakeWashington 4.1
- 542HueytownAlabama 4.0
- 542Lexingtonlow-cost sensorsMassachusetts 4.0
- 542LewistonMaine 4.0
- 542HollandMichigan 4.0
- 542BellevueNebraska 4.0
- 542La VistaNebraska 4.0
- 542DerryNew Hampshire 4.0
- 542KeeneNew Hampshire 4.0
- 542SyracuseNew York 4.0
- 542PawtucketRhode Island 4.0
- 542RidgecrestCalifornia 4.0
- 542PuebloColorado 4.0
- 542AlbuquerqueNew Mexico 4.0
- 542WindsorColorado 4.0
- 542KīheiHawaii 4.0
- 542HonoluluHawaii 4.0
- 558HagerstownMaryland 3.9
- 558North ChicopeeMassachusetts 3.9
- 558PittsfieldMassachusetts 3.9
- 558AugustaMaine 3.9
- 558Grand IslandNebraska 3.9
- 558ConcordCalifornia 3.9
- 558ParadiseCalifornia 3.9
- 558TracyCalifornia 3.9
- 558Las VegasNevada 3.9
- 558BoulderColorado 3.9
- 558Twin FallsIdaho 3.9
- 558CanbyOregon 3.9
- 558GreshamOregon 3.9
- 558MedfordOregon 3.9
- 558HiloHawaii 3.9
- 573BangorMaine 3.8
- 573Redwood CityCalifornia 3.8
- 573Yuba CityCalifornia 3.8
- 573HurricaneUtah 3.8
- 573HelenaMontana 3.8
- 578UticaNew York 3.7
- 578VallejoCalifornia 3.7
- 578AlbanyOregon 3.7
- 578EugeneOregon 3.7
- 578PortlandOregon 3.7
- 578The DallesOregon 3.7
- 578CentraliaWashington 3.7
- 585White PlainsNew York 3.6
- 585ModestoCalifornia 3.6
- 585OrcuttCalifornia 3.6
- 585Idaho FallsIdaho 3.6
- 585BountifulUtah 3.6
- 585Brigham CityUtah 3.6
- 585MagnaUtah 3.6
- 585Salmon CreekWashington 3.6
- 593Sioux FallsSouth Dakota 3.5
- 593Torrancelow-cost sensorsCalifornia 3.5
- 593Boulder CityNevada 3.5
- 593BillingsMontana 3.5
- 593Oregon CityOregon 3.5
- 593TooeleUtah 3.5
- 593AberdeenWashington 3.5
- 593AnchorageAlaska 3.5
- 601Green ValleyArizona 3.4
- 601LincolnCalifornia 3.4
- 601Carson CityNevada 3.4
- 601North OgdenUtah 3.4
- 601KahuluiHawaii 3.4
- 606LimaOhio 3.3
- 606AberdeenSouth Dakota 3.3
- 606ChicoCalifornia 3.3
- 606MilwaukieOregon 3.3
- 606RoseburgOregon 3.3
- 606WoodburnOregon 3.3
- 606Oak HarborWashington 3.3
- 613New CityNew York 3.2
- 613Los Banoslow-cost sensorsCalifornia 3.2
- 613EnterpriseNevada 3.2
- 613AshlandOregon 3.2
- 613BeavertonOregon 3.2
- 613PendletonOregon 3.2
- 613HerrimanUtah 3.2
- 613KentWashington 3.2
- 613LongviewWashington 3.2
- 622CoventryRhode Island 3.1
- 622TruckeeCalifornia 3.1
- 622Cañon CityColorado 3.1
- 622HendersonNevada 3.1
- 622Spring ValleyNevada 3.1
- 622MissoulaMontana 3.1
- 622RedmondOregon 3.1
- 629MarquetteMichigan 3.0
- 629Brookfieldlow-cost sensorsWisconsin 3.0
- 629FolsomCalifornia 3.0
- 629PocatelloIdaho 3.0
- 629GilletteWyoming 3.0
- 629SheridanWyoming 3.0
- 635BoiseIdaho 2.9
- 635Summerlin SouthNevada 2.9
- 637LompocCalifornia 2.8
- 637VacavilleCalifornia 2.8
- 637Grand JunctionColorado 2.8
- 637Walla WallaWashington 2.8
- 637Rock SpringsWyoming 2.8
- 642Newtonlow-cost sensorsMassachusetts 2.7
- 642LaconiaNew Hampshire 2.7
- 642Pasadenalow-cost sensorsCalifornia 2.7
- 642CorvallisOregon 2.7
- 646DallasOregon 2.6
- 647Middletonlow-cost sensorsWisconsin 2.5
- 647MesquiteNevada 2.5
- 647Forest GroveOregon 2.5
- 647CasperWyoming 2.5
- 651Huntington Beachlow-cost sensorsCalifornia 2.4
- 651Kirklandlow-cost sensorsWashington 2.4
- 651PullmanWashington 2.4
- 654BellevueWashington 2.3
- 654Mount VernonWashington 2.3
- 654CheyenneWyoming 2.3
- 654LaramieWyoming 2.3
- 658AnacortesWashington 2.2
- 659MartinezCalifornia 2.1
- 660Union Hill-Novelty Hilllow-cost sensorsWashington 2.0
- 661Palo Altolow-cost sensorsCalifornia 1.8
- 661McMinnvilleOregon 1.8
- 661Bothelllow-cost sensorsWashington 1.8
- 664Goletalow-cost sensorsCalifornia 1.5
- 665Encinitaslow-cost sensorsCalifornia 1.4
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+
The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. 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, April 2026 · United States now
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SmogRank, most polluted cities in United States, PM2.5, April 2026, smogrank.com/us/history/2026-04 (accessed 2 Oct 2026).
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