SmogRank / Countries / United States / March 2025
Most polluted cities in United States, March 2025
650 cities in United States ranked by their average PM2.5 over the 31 days. Worst: El Paso at 45.2 µg/m³, #82 of 2,209 cities in the world. Cleanest: Mount Vernon at 1.2. A city needs measurements on 70% of the days to be ranked.
- 1El PasoTexas 45.2
- 2Sunland ParkNew Mexico 33.6
- 3SocorroTexas 23.6
- 4ColumbusGeorgia 16.9
- 5ConwaySouth Carolina 16.0
- 6Las CrucesNew Mexico 15.8
- 7OdessaTexas 15.4
- 8BrownsvilleTexas 15.2
- 9MissionTexas 14.9
- 10East RidgeTennessee 14.8
- 11BirminghamAlabama 14.5
- 11MaconGeorgia 14.5
- 13TallahasseeFlorida 13.7
- 13AlbanyGeorgia 13.7
- 15Corpus ChristiTexas 13.5
- 16HoustonTexas 13.0
- 17Santa Monicalow-cost sensorsCalifornia 12.7
- 18JenksOklahoma 12.6
- 18ConroeTexas 12.6
- 20LaredoTexas 12.4
- 21TulsaOklahoma 12.2
- 22McAlesterOklahoma 11.6
- 23PasadenaTexas 11.4
- 24WichitaKansas 11.3
- 25SpringdaleArkansas 11.2
- 25Warner RobinsGeorgia 11.2
- 25Live OakTexas 11.2
- 28ChattanoogaTennessee 11.0
- 29HattiesburgMississippi 10.9
- 29LubbockTexas 10.9
- 31BaytownTexas 10.8
- 31San AntonioTexas 10.8
- 33AugustaGeorgia 10.6
- 33DerbyKansas 10.6
- 33Fort WorthTexas 10.6
- 33Eagle PassTexas 10.6
- 37HueytownAlabama 10.4
- 37Saint JosephMissouri 10.4
- 39Little RockArkansas 10.3
- 39CalexicoCalifornia 10.3
- 41RedfordMichigan 10.2
- 42MiamiFlorida 10.1
- 42Granite CityIllinois 10.1
- 42Columbialow-cost sensorsMissouri 10.1
- 45La PorteTexas 10.0
- 46East Saint LouisIllinois 9.9
- 46TopekaKansas 9.9
- 46SpartanburgSouth Carolina 9.9
- 49GainesvilleGeorgia 9.8
- 49Ponca CityOklahoma 9.8
- 51VeniceFlorida 9.7
- 51San MarcosTexas 9.7
- 53Belle GladeFlorida 9.6
- 53Fort LauderdaleFlorida 9.6
- 53LawrencevilleGeorgia 9.6
- 53St. LouisMissouri 9.6
- 53JacksonMississippi 9.6
- 53GreenvilleSouth Carolina 9.6
- 53NipomoCalifornia 9.6
- 60Upper AltonIllinois 9.5
- 60AustinTexas 9.5
- 60Mission BendTexas 9.5
- 60Santa BarbaraCalifornia 9.5
- 64Bonita SpringsFlorida 9.4
- 64ValdostaGeorgia 9.4
- 64College StationTexas 9.4
- 64Jurupa ValleyCalifornia 9.4
- 68OlatheKansas 9.3
- 68GaryIndiana 9.3
- 68WyomingMichigan 9.3
- 71GadsdenAlabama 9.2
- 71Deerfield BeachFlorida 9.2
- 71Baton RougeLouisiana 9.2
- 71MiddletownOhio 9.2
- 75TrussvilleAlabama 9.1
- 75OcalaFlorida 9.1
- 75BeltonTexas 9.1
- 75NogalesArizona 9.1
- 75Candler-McAfeeGeorgia 9.1
- 80Oak RidgeFlorida 9.0
- 80ValricoFlorida 9.0
- 80FlorenceSouth Carolina 9.0
- 80Los AngelesCalifornia 9.0
- 84MontgomeryAlabama 8.9
- 84HomesteadFlorida 8.9
- 84Palm CityFlorida 8.9
- 84St. PetersburgFlorida 8.9
- 84AthensGeorgia 8.9
- 84EdmondOklahoma 8.9
- 84Oklahoma CityOklahoma 8.9
- 84TaylorTexas 8.9
- 92Ponte Vedra BeachFlorida 8.8
- 92TampaFlorida 8.8
- 92DecaturIllinois 8.8
- 92KnoxvilleTennessee 8.8
- 92WaterlooIowa 8.8
- 92San DiegoCalifornia 8.8
- 98JeffersonvilleIndiana 8.7
- 98Terre HauteIndiana 8.7
- 98Kansas CityKansas 8.7
- 98DentonTexas 8.7
- 98Hawthornelow-cost sensorsCalifornia 8.7
- 103DavieFlorida 8.6
- 103AtlantaGeorgia 8.6
- 103SaginawTexas 8.6
- 103OregonOhio 8.6
- 103West MifflinPennsylvania 8.6
- 108LemayMissouri 8.5
- 108North CharlestonSouth Carolina 8.5
- 108CorsicanaTexas 8.5
- 108FontanaCalifornia 8.5
- 108Four CornersFlorida 8.5
- 113PrichardAlabama 8.4
- 113Fort SmithArkansas 8.4
- 113Fort MyersFlorida 8.4
- 113SarasotaFlorida 8.4
- 113SavannahGeorgia 8.4
- 113EvansvilleIndiana 8.4
- 113MooreOklahoma 8.4
- 113GalvestonTexas 8.4
- 113Des MoinesIowa 8.4
- 113BrookingsSouth Dakota 8.4
- 113Great FallsMontana 8.4
- 113MidwayFlorida 8.4
- 125WellingtonFlorida 8.3
- 125OwensboroKentucky 8.3
- 125HernandoMississippi 8.3
- 125CharlotteNorth Carolina 8.3
- 125LexingtonNorth Carolina 8.3
- 125NorwoodOhio 8.3
- 125WheelingWest Virginia 8.3
- 125HelenaMontana 8.3
- 133Delray BeachFlorida 8.2
- 133IndianapolisIndiana 8.2
- 133LouisvilleKentucky 8.2
- 133DoltonIllinois 8.2
- 133BurbankCalifornia 8.2
- 138PascagoulaMississippi 8.1
- 138TexarkanaTexas 8.1
- 138Casa GrandeArizona 8.1
- 141LeawoodKansas 8.0
- 141Valley StationKentucky 8.0
- 141University CityMissouri 8.0
- 141HickoryNorth Carolina 8.0
- 141White OakOhio 8.0
- 141Saint AndrewsSouth Carolina 8.0
- 141MuscatineIowa 8.0
- 141HollandMichigan 8.0
- 141SteubenvilleOhio 8.0
- 141BerkeleyCalifornia 8.0
- 141Carsonlow-cost sensorsCalifornia 8.0
- 141RiversideCalifornia 8.0
- 153BloomingtonIndiana 7.9
- 153KennerLouisiana 7.9
- 153SulphurLouisiana 7.9
- 153SpringfieldMissouri 7.9
- 153PortsmouthOhio 7.9
- 153LawtonOklahoma 7.9
- 153HuntingtonWest Virginia 7.9
- 153Chula VistaCalifornia 7.9
- 161Daytona BeachFlorida 7.8
- 161Ferry PassFlorida 7.8
- 161WestonFlorida 7.8
- 161Winter ParkFlorida 7.8
- 161GulfportMississippi 7.8
- 161Wake Forestlow-cost sensorsNorth Carolina 7.8
- 161BartlettTennessee 7.8
- 161BrookfieldIllinois 7.8
- 161ChampaignIllinois 7.8
- 161Inglewoodlow-cost sensorsCalifornia 7.8
- 171BrunswickGeorgia 7.7
- 171Kansas CityMissouri 7.7
- 171MorrisvilleNorth Carolina 7.7
- 171NashvilleTennessee 7.7
- 171CharlestonWest Virginia 7.7
- 171AnaheimCalifornia 7.7
- 171Long BeachCalifornia 7.7
- 178McDonoughGeorgia 7.6
- 178ClaytonNorth Carolina 7.6
- 178HendersonvilleTennessee 7.6
- 178Elmwood ParkIllinois 7.6
- 178NapervilleIllinois 7.6
- 178CantonOhio 7.6
- 178WestervilleOhio 7.6
- 178LebanonPennsylvania 7.6
- 178PhoenixArizona 7.6
- 178Pasadenalow-cost sensorsCalifornia 7.6
- 188HuntsvilleAlabama 7.5
- 188East LakeFlorida 7.5
- 188Lake MaryFlorida 7.5
- 188ChalmetteLouisiana 7.5
- 188ArnoldMissouri 7.5
- 188RaleighNorth Carolina 7.5
- 188Winston-SalemNorth Carolina 7.5
- 188CincinnatiOhio 7.5
- 188ColumbusOhio 7.5
- 188HarrisburgPennsylvania 7.5
- 188MaranaArizona 7.5
- 188Torrancelow-cost sensorsCalifornia 7.5
- 188WoodlandCalifornia 7.5
- 201DecaturAlabama 7.4
- 201Coconut CreekFlorida 7.4
- 201Safety HarborFlorida 7.4
- 201BaltimoreMaryland 7.4
- 201Calumet CityIllinois 7.4
- 201JolietIllinois 7.4
- 201PeoriaIllinois 7.4
- 201BellevueNebraska 7.4
- 201ComptonCalifornia 7.4
- 201AlbuquerqueNew Mexico 7.4
- 211JacksonvilleFlorida 7.3
- 211ColumbusIndiana 7.3
- 211New AlbanyIndiana 7.3
- 211AshevilleNorth Carolina 7.3
- 211PhiladelphiaPennsylvania 7.3
- 211DearbornMichigan 7.3
- 211ClevelandOhio 7.3
- 211CarlislePennsylvania 7.3
- 211YumaArizona 7.3
- 211Arroyo GrandeCalifornia 7.3
- 211BadgerAlaska 7.3
- 222FairhopeAlabama 7.2
- 222FishersIndiana 7.2
- 222ElizabethtownKentucky 7.2
- 222JeffersontownKentucky 7.2
- 222Hunt ValleyMaryland 7.2
- 222ClemmonsNorth Carolina 7.2
- 222FayettevilleNorth Carolina 7.2
- 222ColumbiaTennessee 7.2
- 222ChicagoIllinois 7.2
- 222Franklin ParkIllinois 7.2
- 222LafayetteIndiana 7.2
- 222PortageIndiana 7.2
- 222La VistaNebraska 7.2
- 222ClovisCalifornia 7.2
- 236AnkenyIowa 7.1
- 236ElkhartIndiana 7.1
- 236HammondIndiana 7.1
- 236MillcreekUtah 7.1
- 236FairbanksAlaska 7.1
- 241Lexington-FayetteKentucky 7.0
- 241Saint MatthewsKentucky 7.0
- 241LafayetteLouisiana 7.0
- 241LibertyMissouri 7.0
- 241DavenportIowa 7.0
- 241CaryIllinois 7.0
- 241ElginIllinois 7.0
- 241East ChicagoIndiana 7.0
- 241Bay CityMichigan 7.0
- 241ReadingPennsylvania 7.0
- 241WatertownSouth Dakota 7.0
- 241Lomitalow-cost sensorsCalifornia 7.0
- 241San JoseCalifornia 7.0
- 254DaytonOhio 6.9
- 254ChesterPennsylvania 6.9
- 254ClintonIowa 6.9
- 254Iowa CityIowa 6.9
- 254Oak LawnIllinois 6.9
- 254DetroitMichigan 6.9
- 254LancasterPennsylvania 6.9
- 254El CajonCalifornia 6.9
- 254OceansideCalifornia 6.9
- 254Spanish SpringsNevada 6.9
- 254AnacortesWashington 6.9
- 265West PensacolaFlorida 6.8
- 265AshlandKentucky 6.8
- 265New OrleansLouisiana 6.8
- 265GreensboroNorth Carolina 6.8
- 265Roanoke RapidsNorth Carolina 6.8
- 265DyersburgTennessee 6.8
- 265Michigan CityIndiana 6.8
- 265ElizabethNew Jersey 6.8
- 265WarrenOhio 6.8
- 265YoungstownOhio 6.8
- 265BensalemPennsylvania 6.8
- 265Oconomowoclow-cost sensorsWisconsin 6.8
- 265Santa ClaritaCalifornia 6.8
- 265StocktonCalifornia 6.8
- 279Cedar RapidsIowa 6.7
- 279AuroraIllinois 6.7
- 279Fort WayneIndiana 6.7
- 279Grand RapidsMichigan 6.7
- 279MankatoMinnesota 6.7
- 279MinneapolisMinnesota 6.7
- 279PerrysburgOhio 6.7
- 279PittsburghPennsylvania 6.7
- 279WilkinsburgPennsylvania 6.7
- 279TucsonArizona 6.7
- 279UkiahCalifornia 6.7
- 290Fruit CoveFlorida 6.6
- 290GainesvilleFlorida 6.6
- 290NicholasvilleKentucky 6.6
- 290YorkPennsylvania 6.6
- 290Apple ValleyMinnesota 6.6
- 290EwingNew Jersey 6.6
- 290New York CityNew York 6.6
- 290JohnstownPennsylvania 6.6
- 290WeirtonWest Virginia 6.6
- 290HanfordCalifornia 6.6
- 290LompocCalifornia 6.6
- 290PowayCalifornia 6.6
- 302PaducahKentucky 6.5
- 302WilmingtonDelaware 6.5
- 302SpringfieldIllinois 6.5
- 302JasperIndiana 6.5
- 302HagerstownMaryland 6.5
- 302PennsaukenNew Jersey 6.5
- 302South VinelandNew Jersey 6.5
- 302LebanonOhio 6.5
- 302HarrisonburgVirginia 6.5
- 302BloomingtonIllinois 6.5
- 302Des PlainesIllinois 6.5
- 302MolineIllinois 6.5
- 302South BendIndiana 6.5
- 302KalamazooMichigan 6.5
- 302PatersonNew Jersey 6.5
- 302AltoonaPennsylvania 6.5
- 302MadisonWisconsin 6.5
- 302Agouralow-cost sensorsCalifornia 6.5
- 302MartinezCalifornia 6.5
- 321RaymoreMissouri 6.4
- 321SpringfieldOhio 6.4
- 321JacksonTennessee 6.4
- 321RockfordIllinois 6.4
- 321State CollegePennsylvania 6.4
- 326EdgewoodMaryland 6.3
- 326CookevilleTennessee 6.3
- 326MaryvilleTennessee 6.3
- 326AkronOhio 6.3
- 326GahannaOhio 6.3
- 326MilwaukeeWisconsin 6.3
- 326WaukeshaWisconsin 6.3
- 326IndioCalifornia 6.3
- 326Rio RanchoNew Mexico 6.3
- 335OrlandoFlorida 6.2
- 335SewellNew Jersey 6.2
- 335ClarksvilleTennessee 6.2
- 335CharlottesvilleVirginia 6.2
- 335RichmondVirginia 6.2
- 335DublinOhio 6.2
- 335BethlehemPennsylvania 6.2
- 335ScrantonPennsylvania 6.2
- 335AtascaderoCalifornia 6.2
- 335BrawleyCalifornia 6.2
- 335West JordanUtah 6.2
- 335West Valley CityUtah 6.2
- 347ScaggsvilleMaryland 6.1
- 347RoanokeVirginia 6.1
- 347Lincoln ParkMichigan 6.1
- 347RochesterMinnesota 6.1
- 347McKeesportPennsylvania 6.1
- 347NorristownPennsylvania 6.1
- 347LivermoreCalifornia 6.1
- 354KingsportTennessee 6.0
- 354NorthbrookIllinois 6.0
- 354JenisonMichigan 6.0
- 354BurnsvilleMinnesota 6.0
- 354ShakopeeMinnesota 6.0
- 354Fort LeeNew Jersey 6.0
- 354BuffaloNew York 6.0
- 354AllentownPennsylvania 6.0
- 354PawtucketRhode Island 6.0
- 354BakersfieldCalifornia 6.0
- 354FresnoCalifornia 6.0
- 354PortervilleCalifornia 6.0
- 354BozemanMontana 6.0
- 354La Crescenta-Montroselow-cost sensorsCalifornia 6.0
- 368GreenvilleNorth Carolina 5.9
- 368Toms RiverNew Jersey 5.9
- 368ChesapeakeVirginia 5.9
- 368MuncieIndiana 5.9
- 368SouthfieldMichigan 5.9
- 368Saint PaulMinnesota 5.9
- 368OmahaNebraska 5.9
- 368MedinaOhio 5.9
- 368Shaker HeightsOhio 5.9
- 368ToledoOhio 5.9
- 368Eau ClaireWisconsin 5.9
- 368MesaArizona 5.9
- 368GlendoraCalifornia 5.9
- 368OaklandCalifornia 5.9
- 368Twin FallsIdaho 5.9
- 383AshburnVirginia 5.8
- 383East HamptonVirginia 5.8
- 383SpringfieldVirginia 5.8
- 383AndersonIndiana 5.8
- 383Jersey CityNew Jersey 5.8
- 383EriePennsylvania 5.8
- 383Casas AdobesArizona 5.8
- 383Lake ElsinoreCalifornia 5.8
- 383VictorvilleCalifornia 5.8
- 383OremUtah 5.8
- 393WashingtonDistrict of Columbia 5.7
- 393DoverDelaware 5.7
- 393AppletonWisconsin 5.7
- 393CorcoranCalifornia 5.7
- 393San FranciscoCalifornia 5.7
- 393VisaliaCalifornia 5.7
- 399Fort ThomasKentucky 5.6
- 399RockvilleMaryland 5.6
- 399HopewellVirginia 5.6
- 399Cleveland HeightsOhio 5.6
- 399EastpointeMichigan 5.6
- 399Port HuronMichigan 5.6
- 399HermitagePennsylvania 5.6
- 399South MilwaukeeWisconsin 5.6
- 399Weirton HeightsWest Virginia 5.6
- 399SalinasCalifornia 5.6
- 399Salt Lake CityUtah 5.6
- 399RentonWashington 5.6
- 399TacomaWashington 5.6
- 412BearDelaware 5.5
- 412NewarkDelaware 5.5
- 412Palm BayFlorida 5.5
- 412ElktonMaryland 5.5
- 412DanburyConnecticut 5.5
- 412KokomoIndiana 5.5
- 412FlintMichigan 5.5
- 412BlaineMinnesota 5.5
- 412RochesterNew York 5.5
- 412GlendaleArizona 5.5
- 412Simi ValleyCalifornia 5.5
- 412LewistonIdaho 5.5
- 424ShreveportLouisiana 5.4
- 424MasonOhio 5.4
- 424TaylorMichigan 5.4
- 424YpsilantiMichigan 5.4
- 424Grand IslandNebraska 5.4
- 424TrentonNew Jersey 5.4
- 424Green BayWisconsin 5.4
- 424OxnardCalifornia 5.4
- 424ThorntonColorado 5.4
- 424Apache JunctionArizona 5.4
- 424MagnaUtah 5.4
- 424Arden-ArcadeCalifornia 5.4
- 436Atlantic CityNew Jersey 5.3
- 436Rose HillVirginia 5.3
- 436WaterburyConnecticut 5.3
- 436GreenfieldMassachusetts 5.3
- 436Saint MichaelMinnesota 5.3
- 436LimaOhio 5.3
- 436PainesvilleOhio 5.3
- 436BridgeportConnecticut 5.3
- 436TempeArizona 5.3
- 436MantecaCalifornia 5.3
- 436TurlockCalifornia 5.3
- 436Dodge CityKansas 5.3
- 436Las VegasNevada 5.3
- 449HartfordConnecticut 5.2
- 449New HavenConnecticut 5.2
- 449KeeneNew Hampshire 5.2
- 449BanningCalifornia 5.2
- 449RosevilleCalifornia 5.2
- 449San Luis ObispoCalifornia 5.2
- 449GreshamOregon 5.2
- 449BountifulUtah 5.2
- 449Port AngelesWashington 5.2
- 449HonoluluHawaii 5.2
- 449Oxon Hill-GlassmanorMaryland 5.2
- 460FraminghamMassachusetts 5.1
- 460PortlandMaine 5.1
- 460Saint CloudMinnesota 5.1
- 460RutlandVermont 5.1
- 460ChicoCalifornia 5.1
- 460FolsomCalifornia 5.1
- 460Brightonlow-cost sensorsColorado 5.1
- 460Cedar CityUtah 5.1
- 460HighlandUtah 5.1
- 460Spanish ForkUtah 5.1
- 460Columbia CityWashington 5.1
- 471ZionIllinois 5.0
- 471AugustaMaine 5.0
- 471LansingMichigan 5.0
- 471LincolnNebraska 5.0
- 471BayonneNew Jersey 5.0
- 471NewburghNew York 5.0
- 471ProvidenceRhode Island 5.0
- 471Live Oaklow-cost sensorsCalifornia 5.0
- 471SacramentoCalifornia 5.0
- 471ButteMontana 5.0
- 471KahuluiHawaii 5.0
- 482South LaurelMaryland 4.9
- 482SpringfieldMassachusetts 4.9
- 482HolbrookNew York 4.9
- 482ModestoCalifornia 4.9
- 482Yuba CityCalifornia 4.9
- 482Lakewoodlow-cost sensorsColorado 4.9
- 482ReddingCalifornia 4.9
- 482AnchorageAlaska 4.9
- 482Makakilo / Kapolei / Honokai HaleHawaii 4.9
- 491AlbanyNew York 4.8
- 491SyracuseNew York 4.8
- 491South San Franciscolow-cost sensorsCalifornia 4.8
- 491TigardOregon 4.8
- 491HerrimanUtah 4.8
- 496New LondonConnecticut 4.7
- 496BostonMassachusetts 4.7
- 496WorcesterMassachusetts 4.7
- 496West FargoNorth Dakota 4.7
- 496VacavilleCalifornia 4.7
- 496GreeleyColorado 4.7
- 496SeattleWashington 4.7
- 503PittsfieldMassachusetts 4.6
- 503White PlainsNew York 4.6
- 503SuperiorWisconsin 4.6
- 503GaltCalifornia 4.6
- 503GilroyCalifornia 4.6
- 503LincolnCalifornia 4.6
- 503Santa PaulaCalifornia 4.6
- 503Thousand OaksCalifornia 4.6
- 503North OgdenUtah 4.6
- 503SheridanWyoming 4.6
- 503RandolphNew Jersey 4.6
- 514PleasantvilleNew Jersey 4.5
- 514BangorMaine 4.5
- 514LewistonMaine 4.5
- 514New CityNew York 4.5
- 514UticaNew York 4.5
- 514Green ValleyArizona 4.5
- 514VallejoCalifornia 4.5
- 514Fort CollinsColorado 4.5
- 514NampaIdaho 4.5
- 514Grants PassOregon 4.5
- 514Rock SpringsWyoming 4.5
- 525BrocktonMassachusetts 4.4
- 525New BrunswickNew Jersey 4.4
- 525Santa RosaCalifornia 4.4
- 525TracyCalifornia 4.4
- 525Idaho FallsIdaho 4.4
- 525AltamontOregon 4.4
- 525Brigham CityUtah 4.4
- 525ParklandWashington 4.4
- 525SpokaneWashington 4.4
- 525Spokane ValleyWashington 4.4
- 535Fall RiverMassachusetts 4.3
- 535DenverColorado 4.3
- 535Grand JunctionColorado 4.3
- 535RenoNevada 4.3
- 535LongmontColorado 4.3
- 535WindsorColorado 4.3
- 541LowellMassachusetts 4.2
- 541MilfordMassachusetts 4.2
- 541North ChicopeeMassachusetts 4.2
- 541AberdeenSouth Dakota 4.2
- 541MaderaCalifornia 4.2
- 541PortlandOregon 4.2
- 541Rapid CitySouth Dakota 4.2
- 541SunnysideWashington 4.2
- 541YakimaWashington 4.2
- 541KīheiHawaii 4.2
- 541Picnic Point-North LynnwoodWashington 4.2
- 552HaverhillMassachusetts 4.1
- 552QuincyMassachusetts 4.1
- 552Sioux FallsSouth Dakota 4.1
- 552PleasantonCalifornia 4.1
- 552San RafaelCalifornia 4.1
- 552BismarckNorth Dakota 4.1
- 552AuburnWashington 4.1
- 552LaceyWashington 4.1
- 560MercedCalifornia 4.0
- 560Redwood CityCalifornia 4.0
- 560San LeandroCalifornia 4.0
- 560Santa CruzCalifornia 4.0
- 560EnterpriseNevada 4.0
- 560Coeur d'AleneIdaho 4.0
- 560MilwaukieOregon 4.0
- 567Lexingtonlow-cost sensorsMassachusetts 3.9
- 567LynnMassachusetts 3.9
- 567DuluthMinnesota 3.9
- 567PortsmouthNew Hampshire 3.9
- 567Goletalow-cost sensorsCalifornia 3.9
- 567HillsboroOregon 3.9
- 573OrcuttCalifornia 3.8
- 573TemeculaCalifornia 3.8
- 573PuebloColorado 3.8
- 573BoiseIdaho 3.8
- 573WenatcheeWashington 3.8
- 573Summerlin SouthNevada 3.8
- 579MarquetteMichigan 3.7
- 579DavisCalifornia 3.7
- 579El CentroCalifornia 3.7
- 579MoscowIdaho 3.7
- 579PocatelloIdaho 3.7
- 579BillingsMontana 3.7
- 579AshlandOregon 3.7
- 579TooeleUtah 3.7
- 579LongviewWashington 3.7
- 588LaconiaNew Hampshire 3.6
- 588ConcordCalifornia 3.6
- 588LancasterCalifornia 3.6
- 588HendersonNevada 3.6
- 588EugeneOregon 3.6
- 588WoodburnOregon 3.6
- 588GilletteWyoming 3.6
- 595DerryNew Hampshire 3.5
- 595HollisterCalifornia 3.5
- 595Windsorlow-cost sensorsCalifornia 3.5
- 595Spring ValleyNevada 3.5
- 595MeridianIdaho 3.5
- 595CanbyOregon 3.5
- 595SalemOregon 3.5
- 595The DallesOregon 3.5
- 595VancouverWashington 3.5
- 595CheyenneWyoming 3.5
- 605FillmoreCalifornia 3.4
- 605Florinlow-cost sensorsCalifornia 3.4
- 605Arvadalow-cost sensorsColorado 3.4
- 605RoseburgOregon 3.4
- 605BellinghamWashington 3.4
- 610ParadiseCalifornia 3.3
- 610PendletonOregon 3.3
- 610ShorelineWashington 3.3
- 613Colorado SpringsColorado 3.2
- 613LittletonColorado 3.2
- 613Coos BayOregon 3.2
- 613Moses LakeWashington 3.2
- 613Salmon CreekWashington 3.2
- 618Boulder CityNevada 3.1
- 618HurricaneUtah 3.1
- 618BoulderColorado 3.1
- 618AlbanyOregon 3.1
- 618BendOregon 3.1
- 618HermistonOregon 3.1
- 618EllensburgWashington 3.1
- 618HiloHawaii 3.1
- 626Cañon CityColorado 3.0
- 626MissoulaMontana 3.0
- 626BremertonWashington 3.0
- 629Palo Altolow-cost sensorsCalifornia 2.9
- 629Ken CarylColorado 2.9
- 629MesquiteNevada 2.9
- 632Forest GroveOregon 2.8
- 632McMinnvilleOregon 2.8
- 632CentraliaWashington 2.8
- 632CasperWyoming 2.8
- 636DallasOregon 2.6
- 636RedmondOregon 2.6
- 636AberdeenWashington 2.6
- 636Inglewood-Finn Hilllow-cost sensorsWashington 2.6
- 640CoventryRhode Island 2.5
- 640Walla WallaWashington 2.5
- 642Oak HarborWashington 2.4
- 642LaramieWyoming 2.4
- 644RidgecrestCalifornia 2.3
- 644TruckeeCalifornia 2.3
- 646Tri-CitiesWashington 2.1
- 647BellevueWashington 1.9
- 648CorvallisOregon 1.8
- 649PullmanWashington 1.7
- 650Mount VernonWashington 1.2
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, March 2025 · United States now
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SmogRank, most polluted cities in United States, PM2.5, March 2025, smogrank.com/us/history/2025-03 (accessed 2 Oct 2026).
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