SmogRank / World / United States / February 2026
Most polluted cities in United States, February 2026
665 cities in United States ranked by their average PM2.5 over the 28 days. Worst: Tulare at 23.8 µg/m³, #415 of 2,520 cities in the world. Cleanest: Casper at 1.2. A city needs measurements on 70% of the days to be ranked.
← Tulare 23.8
- 1Tularelow-cost sensorsCalifornia 78
- 2Delanolow-cost sensorsCalifornia 76
- 3RedfordMichigan 69
- 4YorkPennsylvania 68
- 5Camdenlow-cost sensorsNew Jersey 67
- 6BakersfieldCalifornia 66
- 7VisaliaCalifornia 65
- 8PortsmouthOhio 65
- 8LancasterPennsylvania 65
- 10Wheatonlow-cost sensorsIllinois 65
- 11FresnoCalifornia 64
- 12CalexicoCalifornia 63
- 13Abingtonlow-cost sensorsPennsylvania 63
- 14Ann Arborlow-cost sensorsMichigan 63
- 15Skokielow-cost sensorsIllinois 62
- 16Evergreen Parklow-cost sensorsIllinois 62
- 17ModestoCalifornia 61
- 18CarlislePennsylvania 61
- 19AlbanyNew York 61
- 19ReadingPennsylvania 61
- 21McAlesterOklahoma 61
- 21HarrisburgPennsylvania 61
- 23ToledoOhio 61
- 24ColumbusGeorgia 61
- 24OregonOhio 61
- 24HanfordCalifornia 61
- 27LaredoTexas 60
- 28WilmingtonDelaware 60
- 29PennsaukenNew Jersey 60
- 29Evanstonlow-cost sensorsIllinois 60
- 29DetroitMichigan 60
- 32AlbanyGeorgia 59
- 32MissionTexas 59
- 34WestervilleOhio 59
- 35MaconGeorgia 59
- 35LebanonPennsylvania 59
- 35CorcoranCalifornia 59
- 38NorwoodOhio 59
- 38PhiladelphiaPennsylvania 59
- 38Jurupa ValleyCalifornia 59
- 41BrownsvilleTexas 58
- 41El PasoTexas 58
- 43Wake Forestlow-cost sensorsNorth Carolina 58
- 43MiddletownOhio 58
- 43EdinburgTexas 58
- 46Fort WayneIndiana 58
- 46ClevelandOhio 58
- 46West MifflinPennsylvania 58
- 49BaltimoreMaryland 58
- 49ChesterPennsylvania 58
- 49DearbornMichigan 58
- 49Lincoln ParkMichigan 58
- 49PerrysburgOhio 58
- 54LawrencevilleGeorgia 58
- 54BrookfieldIllinois 58
- 54Franklin ParkIllinois 58
- 54WyomingMichigan 58
- 54MaderaCalifornia 58
- 59BethlehemPennsylvania 58
- 60SouthfieldMichigan 57
- 60NorristownPennsylvania 57
- 60TurlockCalifornia 57
- 63EssexMaryland 57
- 63HattiesburgMississippi 57
- 63BaytownTexas 57
- 63Port HuronMichigan 57
- 67JeffersonvilleIndiana 57
- 67WaterlooIowa 57
- 67EastpointeMichigan 57
- 67SteubenvilleOhio 57
- 67MercedCalifornia 57
- 72IndianapolisIndiana 57
- 72AshlandKentucky 57
- 74West MemphisArkansas 56
- 74LouisvilleKentucky 56
- 74MonroeLouisiana 56
- 74Hunt ValleyMaryland 56
- 74ConroeTexas 56
- 74Corpus ChristiTexas 56
- 80AugustaGeorgia 56
- 80DoltonIllinois 56
- 82CincinnatiOhio 56
- 82ColumbusOhio 56
- 82Elmwood ParkIllinois 56
- 82TaylorMichigan 56
- 82AllentownPennsylvania 56
- 87GainesvilleGeorgia 56
- 87HoustonTexas 56
- 87Des PlainesIllinois 56
- 87Grand RapidsMichigan 56
- 87KalamazooMichigan 56
- 87Grants PassOregon 56
- 93DaytonOhio 56
- 93SpartanburgSouth Carolina 56
- 93Bay CityMichigan 56
- 93NogalesArizona 56
- 97NewarkDelaware 55
- 97RutlandVermont 55
- 99YpsilantiMichigan 55
- 99WhittierCalifornia 55
- 101DecaturAlabama 55
- 101SpringdaleArkansas 55
- 101ElginIllinois 55
- 101CantonOhio 55
- 105ElkhartIndiana 55
- 105AkronOhio 55
- 105DublinOhio 55
- 105MedinaOhio 55
- 105State CollegePennsylvania 55
- 105Oconomowoclow-cost sensorsWisconsin 55
- 105ComptonCalifornia 55
- 105Florinlow-cost sensorsCalifornia 55
- 105SocorroTexas 55
- 114Valley StationKentucky 55
- 114NashvilleTennessee 55
- 114BridgeviewIllinois 55
- 114ChicagoIllinois 55
- 118BearDelaware 55
- 118BloomingtonIndiana 55
- 118EvansvilleIndiana 55
- 118JacksonMississippi 55
- 118South MilwaukeeWisconsin 55
- 118ClovisCalifornia 55
- 118RiversideCalifornia 55
- 125TallahasseeFlorida 54
- 125Warner RobinsGeorgia 54
- 125ChattanoogaTennessee 54
- 125PasadenaTexas 54
- 125San AntonioTexas 54
- 125SpringfieldVirginia 54
- 125HartfordConnecticut 54
- 125New York CityNew York 54
- 125WarrenOhio 54
- 125JohnstownPennsylvania 54
- 125PortervilleCalifornia 54
- 136BuffaloNew York 54
- 136StocktonCalifornia 54
- 138HuntsvilleAlabama 54
- 138DoverDelaware 54
- 138DerbyKansas 54
- 138Live OakTexas 54
- 138MuscatineIowa 54
- 138Calumet CityIllinois 54
- 138RochesterNew York 54
- 138PittsburghPennsylvania 54
- 138ScrantonPennsylvania 54
- 147ShreveportLouisiana 54
- 147PortlandMaine 54
- 147Shaker HeightsOhio 54
- 147WilkinsburgPennsylvania 54
- 147Eagle PassTexas 54
- 147NampaIdaho 54
- 153BessemerAlabama 54
- 153Little RockArkansas 54
- 153WashingtonDistrict of Columbia 54
- 153Granite CityIllinois 54
- 153MuncieIndiana 54
- 153EriePennsylvania 54
- 153MilwaukeeWisconsin 54
- 153WaukeshaWisconsin 54
- 153Hawthornelow-cost sensorsCalifornia 54
- 162WichitaKansas 53
- 162GreenvilleSouth Carolina 53
- 162PeoriaIllinois 53
- 162RockfordIllinois 53
- 162LansingMichigan 53
- 162LindenNew Jersey 53
- 162PainesvilleOhio 53
- 169Saint MatthewsKentucky 53
- 169ElktonMaryland 53
- 169BartlettTennessee 53
- 169Cleveland HeightsOhio 53
- 169HollandMichigan 53
- 169PaysonArizona 53
- 175OwensboroKentucky 53
- 175SulphurLouisiana 53
- 175East ChicagoIndiana 53
- 175HolbrookNew York 53
- 175YoungstownOhio 53
- 180AthensGeorgia 53
- 180EdgewoodMaryland 53
- 180East RidgeTennessee 53
- 180TexarkanaTexas 53
- 180HuntingtonWest Virginia 53
- 180AnaheimCalifornia 53
- 186HagerstownMaryland 53
- 186HernandoMississippi 53
- 186South VinelandNew Jersey 53
- 186Saint AndrewsSouth Carolina 53
- 186AndersonIndiana 53
- 186AltoonaPennsylvania 53
- 186Huntington Beachlow-cost sensorsCalifornia 53
- 193HueytownAlabama 52
- 193East Saint LouisIllinois 52
- 193Upper AltonIllinois 52
- 193JeffersontownKentucky 52
- 193St. LouisMissouri 52
- 193GulfportMississippi 52
- 193Toms RiverNew Jersey 52
- 193DanburyConnecticut 52
- 193WaterburyConnecticut 52
- 193AuroraIllinois 52
- 193HammondIndiana 52
- 193EwingNew Jersey 52
- 193McKeesportPennsylvania 52
- 193Green BayWisconsin 52
- 207New AlbanyIndiana 52
- 207Missouri CityTexas 52
- 207Michigan CityIndiana 52
- 207South BendIndiana 52
- 207Jersey CityNew Jersey 52
- 212JenksOklahoma 52
- 212HendersonvilleTennessee 52
- 212HarrisonburgVirginia 52
- 212MantecaCalifornia 52
- 216PaducahKentucky 52
- 216JasperIndiana 52
- 216LemayMissouri 52
- 216SewellNew Jersey 52
- 216KnoxvilleTennessee 52
- 216FairbanksAlaska 52
- 216Candler-McAfeeGeorgia 52
- 223MontgomeryAlabama 52
- 223SpringfieldOhio 52
- 223FlorenceSouth Carolina 52
- 223AshburnVirginia 52
- 223Iowa CityIowa 52
- 223MolineIllinois 52
- 229ElizabethtownKentucky 52
- 229Baton RougeLouisiana 52
- 229Ponca CityOklahoma 52
- 229AustinTexas 52
- 229Rose HillVirginia 52
- 229ClintonIowa 52
- 229Fort LeeNew Jersey 52
- 229HermitagePennsylvania 52
- 229Great FallsMontana 52
- 238BirminghamAlabama 51
- 238TrussvilleAlabama 51
- 238Lexington-FayetteKentucky 51
- 238Columbialow-cost sensorsMissouri 51
- 238ColumbiaTennessee 51
- 238PhoenixArizona 51
- 238Los AngelesCalifornia 51
- 238MedfordOregon 51
- 238Arden-ArcadeCalifornia 51
- 238RandolphNew Jersey 51
- 248MasonOhio 51
- 248MooreOklahoma 51
- 248JolietIllinois 51
- 248WoodlandCalifornia 51
- 252KennerLouisiana 51
- 252South LaurelMaryland 51
- 252Fort WorthTexas 51
- 252CharlestonWest Virginia 51
- 252DavenportIowa 51
- 252Oak LawnIllinois 51
- 252PatersonNew Jersey 51
- 252WeirtonWest Virginia 51
- 252Inglewoodlow-cost sensorsCalifornia 51
- 252Long BeachCalifornia 51
- 262ValdostaGeorgia 50
- 262SpringfieldMissouri 50
- 262PascagoulaMississippi 50
- 262DurhamNorth Carolina 50
- 262LebanonOhio 50
- 262White OakOhio 50
- 262GreenfieldMassachusetts 50
- 262SpringfieldMassachusetts 50
- 262ElizabethNew Jersey 50
- 262Carsonlow-cost sensorsCalifornia 50
- 262YakimaWashington 50
- 273SavannahGeorgia 49
- 273CharlotteNorth Carolina 49
- 273RaleighNorth Carolina 49
- 273Oklahoma CityOklahoma 49
- 273Port ArthurTexas 49
- 273ChesapeakeVirginia 49
- 273Fort DodgeIowa 49
- 273SyracuseNew York 49
- 273BadgerAlaska 49
- 282GadsdenAlabama 49
- 282PrichardAlabama 49
- 282Ferry PassFlorida 49
- 282FayettevilleNorth Carolina 49
- 282Mission BendTexas 49
- 282NapervilleIllinois 49
- 282BurnsvilleMinnesota 49
- 282KeeneNew Hampshire 49
- 282AppletonWisconsin 49
- 282RosevilleCalifornia 49
- 282SacramentoCalifornia 49
- 293NicholasvilleKentucky 48
- 293ScaggsvilleMaryland 48
- 293North CharlestonSouth Carolina 48
- 293ClarksvilleTennessee 48
- 293BrookingsSouth Dakota 48
- 293MadisonWisconsin 48
- 299Daytona BeachFlorida 48
- 299Kansas CityKansas 48
- 299New OrleansLouisiana 48
- 299RockvilleMaryland 48
- 299ClemmonsNorth Carolina 48
- 299MorrisvilleNorth Carolina 48
- 299Winston-SalemNorth Carolina 48
- 299CaryIllinois 48
- 299ZionIllinois 48
- 299LaconiaNew Hampshire 48
- 299FontanaCalifornia 48
- 299San DiegoCalifornia 48
- 311Fort ThomasKentucky 47
- 311Cedar RapidsIowa 47
- 311NorthbrookIllinois 47
- 311BangorMaine 47
- 311PawtucketRhode Island 47
- 311MidwayFlorida 47
- 317Fort SmithArkansas 47
- 317Ponte Vedra BeachFlorida 47
- 317AtlantaGeorgia 47
- 317TopekaKansas 47
- 317JacksonTennessee 47
- 317HopewellVirginia 47
- 317RichmondVirginia 47
- 317MinneapolisMinnesota 47
- 317LincolnCalifornia 47
- 317OaklandCalifornia 47
- 317Torrancelow-cost sensorsCalifornia 47
- 317Yuba CityCalifornia 47
- 329JacksonvilleFlorida 46
- 329OcalaFlorida 46
- 329Saint JosephMissouri 46
- 329ClaytonNorth Carolina 46
- 329College StationTexas 46
- 329BayonneNew Jersey 46
- 329TrentonNew Jersey 46
- 329Upper Saint ClairPennsylvania 46
- 329Eau ClaireWisconsin 46
- 329BridgeportConnecticut 46
- 329ChicoCalifornia 46
- 329LewistonIdaho 46
- 341West PensacolaFlorida 46
- 341OlatheKansas 46
- 341HickoryNorth Carolina 46
- 341CharlottesvilleVirginia 46
- 341New HavenConnecticut 46
- 341San JoseCalifornia 46
- 341AltamontOregon 46
- 348FairhopeAlabama 45
- 348University CityMissouri 45
- 348EdmondOklahoma 45
- 348East HamptonVirginia 45
- 348SuperiorWisconsin 45
- 348Las VegasNevada 45
- 348RenoNevada 45
- 348MillcreekUtah 45
- 356La PorteTexas 44
- 356FraminghamMassachusetts 44
- 356Saint PaulMinnesota 44
- 359SpringfieldIllinois 44
- 359ChalmetteLouisiana 44
- 359GreenvilleNorth Carolina 44
- 359MaryvilleTennessee 44
- 359BloomingtonIllinois 44
- 359Newtonlow-cost sensorsMassachusetts 44
- 359GahannaOhio 44
- 366Bonita SpringsFlorida 43
- 366Oak RidgeFlorida 43
- 366St. PetersburgFlorida 43
- 366DecaturIllinois 43
- 366ChampaignIllinois 43
- 366RochesterMinnesota 43
- 366UticaNew York 43
- 366Middletonlow-cost sensorsWisconsin 43
- 366RichmondCalifornia 43
- 366Oxon Hill-GlassmanorMaryland 43
- 376Kendale LakesFlorida 43
- 376TampaFlorida 43
- 376Short PumpVirginia 43
- 376HaverhillMassachusetts 43
- 376ProvidenceRhode Island 43
- 376Chula VistaCalifornia 43
- 376San FranciscoCalifornia 43
- 383Fort LauderdaleFlorida 42
- 383MiamiFlorida 42
- 383ArnoldMissouri 42
- 383GreensboroNorth Carolina 42
- 383DyersburgTennessee 42
- 383DentonTexas 42
- 383LimaOhio 42
- 383Weirton HeightsWest Virginia 42
- 383Mission ViejoCalifornia 42
- 392VeniceFlorida 42
- 392LawtonOklahoma 42
- 392CorsicanaTexas 42
- 392BostonMassachusetts 42
- 392ShakopeeMinnesota 42
- 392HillsboroOregon 42
- 398BrunswickGeorgia 41
- 398Kansas CityMissouri 41
- 398AshevilleNorth Carolina 41
- 398San MarcosTexas 41
- 398NewburghNew York 41
- 398UkiahCalifornia 41
- 404CookevilleTennessee 41
- 404GalvestonTexas 41
- 404Lexingtonlow-cost sensorsMassachusetts 41
- 404LewistonMaine 41
- 404BlaineMinnesota 41
- 404BurbankCalifornia 41
- 404OceansideCalifornia 41
- 404ReddingCalifornia 41
- 412AnkenyIowa 40
- 412Apple ValleyMinnesota 40
- 412GlendaleArizona 40
- 412SunnysideWashington 40
- 416OrlandoFlorida 39
- 416KingsportTennessee 39
- 416RoanokeVirginia 39
- 416New LondonConnecticut 39
- 416PittsfieldMassachusetts 39
- 416WorcesterMassachusetts 39
- 416San LeandroCalifornia 39
- 416San Luis ObispoCalifornia 39
- 416ButteMontana 39
- 425Fruit CoveFlorida 39
- 425Roanoke RapidsNorth Carolina 39
- 425Atlantic CityNew Jersey 39
- 425SaginawTexas 39
- 425LynnMassachusetts 39
- 425AugustaMaine 39
- 425El CajonCalifornia 39
- 425Lomitalow-cost sensorsCalifornia 39
- 425Santa Monicalow-cost sensorsCalifornia 39
- 434ValricoFlorida 38
- 434ConwaySouth Carolina 38
- 434SalemVirginia 38
- 434BrocktonMassachusetts 38
- 434Fall RiverMassachusetts 38
- 434LowellMassachusetts 38
- 434North ChicopeeMassachusetts 38
- 434MankatoMinnesota 38
- 434White PlainsNew York 38
- 434VallejoCalifornia 38
- 434Rio RanchoNew Mexico 38
- 445RaymoreMissouri 38
- 445Sunland ParkNew Mexico 38
- 445RoseburgOregon 38
- 448GainesvilleFlorida 37
- 448Des MoinesIowa 37
- 448Saint CloudMinnesota 37
- 448GaltCalifornia 37
- 448LivermoreCalifornia 37
- 448West JordanUtah 37
- 448Port AngelesWashington 37
- 448TacomaWashington 37
- 456SarasotaFlorida 37
- 456LeawoodKansas 37
- 456PflugervilleTexas 37
- 456TaylorTexas 37
- 456QuincyMassachusetts 37
- 456JenisonMichigan 37
- 456Saint MichaelMinnesota 37
- 456New CityNew York 37
- 456TempeArizona 37
- 456Santa BarbaraCalifornia 37
- 466Palm CityFlorida 36
- 466Safety HarborFlorida 36
- 466WellingtonFlorida 36
- 466BeltonTexas 36
- 466MilfordMassachusetts 36
- 466Palo Altolow-cost sensorsCalifornia 36
- 466WenatcheeWashington 36
- 473Belle GladeFlorida 36
- 473Fort MyersFlorida 36
- 473Pompano BeachFlorida 36
- 473PleasantvilleNew Jersey 36
- 473DuluthMinnesota 36
- 473BerkeleyCalifornia 36
- 473PowayCalifornia 36
- 473South San Franciscolow-cost sensorsCalifornia 36
- 473OdessaTexas 36
- 473West Valley CityUtah 36
- 473Columbia CityWashington 36
- 484Lake MaryFlorida 35
- 484LibertyMissouri 35
- 484TucsonArizona 35
- 484DavisCalifornia 35
- 484HelenaMontana 35
- 484Four CornersFlorida 35
- 484Picnic Point-North LynnwoodWashington 35
- 491MesaArizona 34
- 491YumaArizona 34
- 491Grand JunctionColorado 34
- 491AlbuquerqueNew Mexico 34
- 491HermistonOregon 34
- 491Salt Lake CityUtah 34
- 491AuburnWashington 34
- 498DavieFlorida 34
- 498Casa GrandeArizona 34
- 498BillingsMontana 34
- 498RentonWashington 34
- 502Deerfield BeachFlorida 33
- 502East LakeFlorida 33
- 502McDonoughGeorgia 33
- 502PleasantonCalifornia 33
- 502TracyCalifornia 33
- 502WoodburnOregon 33
- 502EllensburgWashington 33
- 502VancouverWashington 33
- 510Delray BeachFlorida 33
- 510Cedar ParkTexas 33
- 510West FargoNorth Dakota 33
- 510LincolnNebraska 33
- 510AberdeenSouth Dakota 33
- 510GreeleyColorado 33
- 516PortsmouthNew Hampshire 32
- 516NipomoCalifornia 32
- 516Santa ClaritaCalifornia 32
- 516HobbsNew Mexico 32
- 516BozemanMontana 32
- 516AlbanyOregon 32
- 516EugeneOregon 32
- 516PendletonOregon 32
- 516SeattleWashington 32
- 525WestonFlorida 32
- 525DerryNew Hampshire 32
- 525Agouralow-cost sensorsCalifornia 32
- 525AtascaderoCalifornia 32
- 525BrawleyCalifornia 32
- 525ThorntonColorado 32
- 525OremUtah 32
- 532Palm BayFlorida 31
- 532El CentroCalifornia 31
- 532Redwood CityCalifornia 31
- 532Spanish SpringsNevada 31
- 532The DallesOregon 31
- 537La VistaNebraska 31
- 537Lake ElsinoreCalifornia 31
- 537Santa RosaCalifornia 31
- 537TigardOregon 31
- 537BountifulUtah 31
- 537Moses LakeWashington 31
- 537KahuluiHawaii 31
- 537HonoluluHawaii 31
- 537Tri-CitiesWashington 31
- 546Coconut CreekFlorida 30
- 546OmahaNebraska 30
- 546ConcordCalifornia 30
- 546GlendoraCalifornia 30
- 546Santa CruzCalifornia 30
- 546Carson CityNevada 30
- 546SalemOregon 30
- 546Rapid CitySouth Dakota 30
- 554BellevueNebraska 29
- 554IndioCalifornia 29
- 554Simi ValleyCalifornia 29
- 554VacavilleCalifornia 29
- 554Fort CollinsColorado 29
- 554Oregon CityOregon 29
- 560GilroyCalifornia 29
- 560Coeur d'AleneIdaho 29
- 560MagnaUtah 29
- 560SpokaneWashington 29
- 564FolsomCalifornia 28
- 564Apache JunctionArizona 28
- 564LongmontColorado 28
- 564BendOregon 28
- 564LaceyWashington 28
- 564La Crescenta-Montroselow-cost sensorsCalifornia 28
- 570CoventryRhode Island 28
- 570Casas AdobesArizona 28
- 570MilwaukieOregon 28
- 570ParklandWashington 28
- 570Spokane ValleyWashington 28
- 575Cedar CityUtah 27
- 575Brigham CityUtah 27
- 575North OgdenUtah 27
- 575BellinghamWashington 27
- 579MaranaArizona 26
- 579PocatelloIdaho 26
- 579HighlandUtah 26
- 579Walla WallaWashington 26
- 579SheridanWyoming 26
- 584Arroyo GrandeCalifornia 26
- 584ParadiseCalifornia 26
- 584Thousand OaksCalifornia 26
- 584Dodge CityKansas 26
- 584Coos BayOregon 26
- 589GreshamOregon 25
- 589ShorelineWashington 25
- 589HiloHawaii 25
- 592OxnardCalifornia 24
- 592SalinasCalifornia 24
- 592San RafaelCalifornia 24
- 592Windsorlow-cost sensorsCalifornia 24
- 592DenverColorado 24
- 592Lakewoodlow-cost sensorsColorado 24
- 592Spring ValleyNevada 24
- 592BoiseIdaho 24
- 592BeavertonOregon 24
- 592PortlandOregon 24
- 592CentraliaWashington 24
- 592LongviewWashington 24
- 604Seasidelow-cost sensorsCalifornia 24
- 604HendersonNevada 24
- 604AshlandOregon 24
- 604DallasOregon 24
- 604TooeleUtah 24
- 604KentWashington 24
- 610OrcuttCalifornia 23
- 610Pasadenalow-cost sensorsCalifornia 23
- 612Grand IslandNebraska 23
- 612BanningCalifornia 23
- 612CanbyOregon 23
- 612Spanish ForkUtah 23
- 612KīheiHawaii 23
- 617LancasterCalifornia 22
- 617MartinezCalifornia 22
- 617RedmondOregon 22
- 620WindsorColorado 22
- 620MoscowIdaho 22
- 620McMinnvilleOregon 22
- 620BremertonWashington 22
- 620Salmon CreekWashington 22
- 625MarquetteMichigan 21
- 625BurienWashington 21
- 627Colorado SpringsColorado 21
- 627PuebloColorado 21
- 627Idaho FallsIdaho 21
- 630LafayetteLouisiana 20
- 630FillmoreCalifornia 20
- 630Ken CarylColorado 20
- 630EnterpriseNevada 20
- 634HollisterCalifornia 19
- 634TruckeeCalifornia 19
- 634LittletonColorado 19
- 637Las CrucesNew Mexico 19
- 637Twin FallsIdaho 19
- 637MissoulaMontana 19
- 640Arvadalow-cost sensorsColorado 18
- 640HurricaneUtah 18
- 640Summerlin SouthNevada 18
- 643CorvallisOregon 18
- 643HerrimanUtah 18
- 643AberdeenWashington 18
- 646RidgecrestCalifornia 17
- 647MesquiteNevada 16
- 647Forest GroveOregon 16
- 647Rock SpringsWyoming 16
- 650BoulderColorado 16
- 650GilletteWyoming 16
- 652Boulder CityNevada 15
- 653Green ValleyArizona 14
- 653Cañon CityColorado 14
- 655BellevueWashington 13
- 655PullmanWashington 13
- 655LaramieWyoming 13
- 658LompocCalifornia 11
- 659Goletalow-cost sensorsCalifornia 11
- 659Oak HarborWashington 11
- 659CheyenneWyoming 11
- 662Bothelllow-cost sensorsWashington 9
- 663AnacortesWashington 8
- 664Union Hill-Novelty Hilllow-cost sensorsWashington 8
- 665CasperWyoming 7
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, February 2026 · United States now
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SmogRank, most polluted cities in United States, PM2.5, February 2026, smogrank.com/us/history/2026-02 (accessed 2 Oct 2026).
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