SmogRank / World / United States / March 2026
Most polluted cities in United States, March 2026
669 cities in United States ranked by their average PM2.5 over the 31 days. Worst: South Lake Tahoe at 32.5 µg/m³, #209 of 2,616 cities in the world. Cleanest: Union Hill-Novelty Hill at 1.2. A city needs measurements on 70% of the days to be ranked.
← South Lake Tahoe 32.5
- 1South Lake TahoeCalifornia 54
- 2CalexicoCalifornia 40
- 3Delanolow-cost sensorsCalifornia 32
- 4Tularelow-cost sensorsCalifornia 28
- 5AlbanyGeorgia 27
- 6MaconGeorgia 27
- 7Jurupa ValleyCalifornia 25
- 8PortervilleCalifornia 25
- 9BadgerAlaska 25
- 10RedfordMichigan 25
- 11BakersfieldCalifornia 23
- 11VisaliaCalifornia 23
- 13ColumbusGeorgia 23
- 13WhittierCalifornia 23
- 15AugustaGeorgia 23
- 15ChattanoogaTennessee 23
- 15El PasoTexas 23
- 18Hawthornelow-cost sensorsCalifornia 23
- 19Inglewoodlow-cost sensorsCalifornia 22
- 20WichitaKansas 22
- 21RiversideCalifornia 22
- 22Royal Oaklow-cost sensorsMichigan 22
- 22Los AngelesCalifornia 22
- 22Pasadenalow-cost sensorsCalifornia 22
- 25TallahasseeFlorida 22
- 25Wake Forestlow-cost sensorsNorth Carolina 22
- 25LaredoTexas 22
- 25FontanaCalifornia 22
- 29AthensGeorgia 22
- 30GadsdenAlabama 22
- 31Warner RobinsGeorgia 20
- 32MontgomeryAlabama 20
- 32Carsonlow-cost sensorsCalifornia 20
- 32ComptonCalifornia 20
- 32Candler-McAfeeGeorgia 20
- 36BrookfieldIllinois 20
- 37Santa Monicalow-cost sensorsCalifornia 20
- 38SocorroTexas 20
- 39OdessaTexas 20
- 40SpartanburgSouth Carolina 20
- 41East RidgeTennessee 20
- 41CorcoranCalifornia 20
- 41Huntington Beachlow-cost sensorsCalifornia 20
- 44ValdostaGeorgia 20
- 44Skokielow-cost sensorsIllinois 20
- 46Torrancelow-cost sensorsCalifornia 20
- 47DerbyKansas 18
- 47TopekaKansas 18
- 47Nileslow-cost sensorsIllinois 18
- 47FresnoCalifornia 18
- 51SpringdaleArkansas 18
- 51FairbanksAlaska 18
- 53AnaheimCalifornia 18
- 54BessemerAlabama 18
- 54TulsaOklahoma 18
- 56Ponca CityOklahoma 18
- 57Camdenlow-cost sensorsNew Jersey 18
- 57WaterlooIowa 18
- 57Evanstonlow-cost sensorsIllinois 18
- 57San DiegoCalifornia 18
- 61LawrencevilleGeorgia 18
- 61JacksonMississippi 18
- 61North CharlestonSouth Carolina 18
- 64BirminghamAlabama 18
- 64MissionTexas 18
- 64Blue Islandlow-cost sensorsIllinois 18
- 64Evergreen Parklow-cost sensorsIllinois 18
- 68HuntsvilleAlabama 18
- 68SavannahGeorgia 18
- 68FlorenceSouth Carolina 18
- 68GreenvilleSouth Carolina 18
- 68HanfordCalifornia 18
- 68Long BeachCalifornia 18
- 68Eagle PassTexas 18
- 75West MemphisArkansas 18
- 75MuscatineIowa 18
- 75BridgeviewIllinois 18
- 75Chula VistaCalifornia 18
- 79TrussvilleAlabama 17
- 79AshlandKentucky 17
- 79PhiladelphiaPennsylvania 17
- 82Little RockArkansas 17
- 82GainesvilleGeorgia 17
- 82Winston-SalemNorth Carolina 17
- 82WyomingMichigan 17
- 82Lomitalow-cost sensorsCalifornia 17
- 87AtlantaGeorgia 17
- 87CharlotteNorth Carolina 17
- 87Saint AndrewsSouth Carolina 17
- 87TexarkanaTexas 17
- 87Franklin ParkIllinois 17
- 87Brookfieldlow-cost sensorsWisconsin 17
- 87HobbsNew Mexico 17
- 94Granite CityIllinois 17
- 94HattiesburgMississippi 17
- 94Corpus ChristiTexas 17
- 94Abingtonlow-cost sensorsPennsylvania 17
- 94NogalesArizona 17
- 99DecaturAlabama 17
- 99ShreveportLouisiana 17
- 99BurbankCalifornia 17
- 102Saint JosephMissouri 17
- 102ClemmonsNorth Carolina 17
- 102LexingtonNorth Carolina 17
- 102MorrisvilleNorth Carolina 17
- 102JenksOklahoma 17
- 102ClintonIowa 17
- 102ElginIllinois 17
- 109MooreOklahoma 17
- 109KnoxvilleTennessee 17
- 109NashvilleTennessee 17
- 109Calumet CityIllinois 17
- 113OlatheKansas 17
- 113Columbialow-cost sensorsMissouri 17
- 113PortsmouthOhio 17
- 113HendersonvilleTennessee 17
- 113DoltonIllinois 17
- 113Oconomowoclow-cost sensorsWisconsin 17
- 119EvansvilleIndiana 17
- 119FayettevilleNorth Carolina 17
- 119BaytownTexas 17
- 119Iowa CityIowa 17
- 119Elmwood ParkIllinois 17
- 119PeoriaIllinois 17
- 119HammondIndiana 17
- 119Sunland ParkNew Mexico 17
- 127Kansas CityKansas 17
- 127YorkPennsylvania 17
- 127BrownsvilleTexas 17
- 127EdinburgTexas 17
- 127ChicagoIllinois 17
- 127Des PlainesIllinois 17
- 127FlintMichigan 17
- 127Santa BarbaraCalifornia 17
- 135BaltimoreMaryland 15
- 135Fort WayneIndiana 15
- 135Ann Arborlow-cost sensorsMichigan 15
- 135OceansideCalifornia 15
- 139Fort SmithArkansas 15
- 139MiddletownOhio 15
- 139Oklahoma CityOklahoma 15
- 139BrookingsSouth Dakota 15
- 139Agouralow-cost sensorsCalifornia 15
- 139OaklandCalifornia 15
- 145Upper AltonIllinois 15
- 145RockfordIllinois 15
- 145LebanonPennsylvania 15
- 145NipomoCalifornia 15
- 149New AlbanyIndiana 15
- 149LouisvilleKentucky 15
- 149St. LouisMissouri 15
- 149DurhamNorth Carolina 15
- 149HickoryNorth Carolina 15
- 149RaleighNorth Carolina 15
- 149MolineIllinois 15
- 156East Saint LouisIllinois 15
- 156Fort DodgeIowa 15
- 156ClevelandOhio 15
- 156LancasterPennsylvania 15
- 156MilwaukeeWisconsin 15
- 156Mission ViejoCalifornia 15
- 162OwensboroKentucky 15
- 162ColumbiaTennessee 15
- 162AuroraIllinois 15
- 162JolietIllinois 15
- 162ModestoCalifornia 15
- 162San FranciscoCalifornia 15
- 168JeffersonvilleIndiana 15
- 168SteubenvilleOhio 15
- 168WestervilleOhio 15
- 168WaukeshaWisconsin 15
- 168MercedCalifornia 15
- 168SalinasCalifornia 15
- 174Valley StationKentucky 15
- 174GreensboroNorth Carolina 15
- 174PennsaukenNew Jersey 15
- 174BartlettTennessee 15
- 174Cedar RapidsIowa 15
- 174DavenportIowa 15
- 174PerrysburgOhio 15
- 174El CajonCalifornia 15
- 174Great FallsMontana 15
- 183MonroeLouisiana 15
- 183EdmondOklahoma 15
- 183MaryvilleTennessee 15
- 183Encinitaslow-cost sensorsCalifornia 15
- 183MaderaCalifornia 15
- 183PowayCalifornia 15
- 183StocktonCalifornia 15
- 183MidwayFlorida 15
- 191Ferry PassFlorida 15
- 191McDonoughGeorgia 15
- 191Baton RougeLouisiana 15
- 191University CityMissouri 15
- 191AshevilleNorth Carolina 15
- 191ClarksvilleTennessee 15
- 191NapervilleIllinois 15
- 191Oak LawnIllinois 15
- 191ToledoOhio 15
- 200Kendale LakesFlorida 13
- 200Ponte Vedra BeachFlorida 13
- 200IndianapolisIndiana 13
- 200SpringfieldMissouri 13
- 200NorwoodOhio 13
- 200McAlesterOklahoma 13
- 200West MifflinPennsylvania 13
- 200GlendoraCalifornia 13
- 200San Luis ObispoCalifornia 13
- 209WilmingtonDelaware 13
- 209GulfportMississippi 13
- 209HernandoMississippi 13
- 209East ChicagoIndiana 13
- 209ElkhartIndiana 13
- 209Bay CityMichigan 13
- 209DetroitMichigan 13
- 209New York CityNew York 13
- 209OregonOhio 13
- 209PhoenixArizona 13
- 209TucsonArizona 13
- 209Lake ElsinoreCalifornia 13
- 221JeffersontownKentucky 13
- 221Live OakTexas 13
- 221Grand RapidsMichigan 13
- 221MadisonWisconsin 13
- 221Casa GrandeArizona 13
- 221San JoseCalifornia 13
- 227WashingtonDistrict of Columbia 13
- 227OcalaFlorida 13
- 227VeniceFlorida 13
- 227BrunswickGeorgia 13
- 227EssexMaryland 13
- 227LawtonOklahoma 13
- 227AustinTexas 13
- 227HoustonTexas 13
- 227CharlestonWest Virginia 13
- 227AnkenyIowa 13
- 227Des MoinesIowa 13
- 227ChampaignIllinois 13
- 227MinneapolisMinnesota 13
- 240PrichardAlabama 13
- 240DecaturIllinois 13
- 240BloomingtonIndiana 13
- 240JasperIndiana 13
- 240LemayMissouri 13
- 240ClaytonNorth Carolina 13
- 240CookevilleTennessee 13
- 240ConroeTexas 13
- 240HuntingtonWest Virginia 13
- 240South BendIndiana 13
- 240DearbornMichigan 13
- 240Lincoln ParkMichigan 13
- 240MankatoMinnesota 13
- 240HarrisburgPennsylvania 13
- 240RichmondCalifornia 13
- 240Santa ClaritaCalifornia 13
- 240Arden-ArcadeCalifornia 13
- 257St. PetersburgFlorida 13
- 257ElizabethtownKentucky 13
- 257JacksonTennessee 13
- 257San AntonioTexas 13
- 257ChesapeakeVirginia 13
- 257Michigan CityIndiana 13
- 257KalamazooMichigan 13
- 257ElizabethNew Jersey 13
- 257Jersey CityNew Jersey 13
- 257AppletonWisconsin 13
- 257NampaIdaho 13
- 268TampaFlorida 13
- 268Saint MatthewsKentucky 13
- 268Kansas CityMissouri 13
- 268ConwaySouth Carolina 13
- 268CharlottesvilleVirginia 13
- 268SpringfieldVirginia 13
- 268JenisonMichigan 13
- 268Saint PaulMinnesota 13
- 268Fort LeeNew Jersey 13
- 268CarlislePennsylvania 13
- 268San LeandroCalifornia 13
- 268WoodlandCalifornia 13
- 280Oak RidgeFlorida 13
- 280Palm CityFlorida 13
- 280SpringfieldIllinois 13
- 280PascagoulaMississippi 13
- 280KingsportTennessee 13
- 280RichmondVirginia 13
- 280CaryIllinois 13
- 280PatersonNew Jersey 13
- 280WatertownSouth Dakota 13
- 280Green BayWisconsin 13
- 280MantecaCalifornia 13
- 291Bonita SpringsFlorida 13
- 291Fort LauderdaleFlorida 13
- 291MiamiFlorida 13
- 291LeawoodKansas 13
- 291GreenvilleNorth Carolina 13
- 291Toms RiverNew Jersey 13
- 291PasadenaTexas 13
- 291HopewellVirginia 13
- 291ReadingPennsylvania 13
- 291Middletonlow-cost sensorsWisconsin 13
- 291ClovisCalifornia 13
- 291Simi ValleyCalifornia 13
- 303JacksonvilleFlorida 13
- 303ValricoFlorida 13
- 303New OrleansLouisiana 13
- 303RaymoreMissouri 13
- 303Roanoke RapidsNorth Carolina 13
- 303ColumbusOhio 13
- 303ChesterPennsylvania 13
- 303New HavenConnecticut 13
- 303BloomingtonIllinois 13
- 303South MilwaukeeWisconsin 13
- 303MesaArizona 13
- 303TurlockCalifornia 13
- 315LansingMichigan 12
- 315BurnsvilleMinnesota 12
- 315BuffaloNew York 12
- 315NorristownPennsylvania 12
- 315Arroyo GrandeCalifornia 12
- 315Florinlow-cost sensorsCalifornia 12
- 321PaducahKentucky 12
- 321KennerLouisiana 12
- 321ArnoldMissouri 12
- 321South VinelandNew Jersey 12
- 321Fort WorthTexas 12
- 321AshburnVirginia 12
- 321MuncieIndiana 12
- 321EastpointeMichigan 12
- 321Port HuronMichigan 12
- 321EwingNew Jersey 12
- 321RutlandVermont 12
- 321BridgeportConnecticut 12
- 321Goletalow-cost sensorsCalifornia 12
- 321Apache JunctionArizona 12
- 321LewistonIdaho 12
- 336Daytona BeachFlorida 12
- 336CincinnatiOhio 12
- 336DyersburgTennessee 12
- 336East HamptonVirginia 12
- 336Short PumpVirginia 12
- 336BlaineMinnesota 12
- 336DublinOhio 12
- 336WarrenOhio 12
- 336PaysonArizona 12
- 345Pompano BeachFlorida 12
- 345Lexington-FayetteKentucky 12
- 345NicholasvilleKentucky 12
- 345ChalmetteLouisiana 12
- 345DaytonOhio 12
- 345RoanokeVirginia 12
- 345SalemVirginia 12
- 345SouthfieldMichigan 12
- 345YpsilantiMichigan 12
- 345LindenNew Jersey 12
- 345Eau ClaireWisconsin 12
- 345TempeArizona 12
- 345BerkeleyCalifornia 12
- 345SacramentoCalifornia 12
- 345La Crescenta-Montroselow-cost sensorsCalifornia 12
- 360Hunt ValleyMaryland 12
- 360Rose HillVirginia 12
- 360AndersonIndiana 12
- 360RochesterMinnesota 12
- 360AlbanyNew York 12
- 360HolbrookNew York 12
- 360CantonOhio 12
- 360PittsburghPennsylvania 12
- 360GlendaleArizona 12
- 369Belle GladeFlorida 12
- 369Fruit CoveFlorida 12
- 369OrlandoFlorida 12
- 369West PensacolaFlorida 12
- 369DanburyConnecticut 12
- 369Cleveland HeightsOhio 12
- 369NorthbrookIllinois 12
- 369TaylorMichigan 12
- 369ShakopeeMinnesota 12
- 369MedinaOhio 12
- 369WilkinsburgPennsylvania 12
- 369YumaArizona 12
- 369OxnardCalifornia 12
- 369RenoNevada 12
- 383Fort MyersFlorida 12
- 383GainesvilleFlorida 12
- 383SewellNew Jersey 12
- 383MasonOhio 12
- 383College StationTexas 12
- 383CorsicanaTexas 12
- 383Mission BendTexas 12
- 383FillmoreCalifornia 12
- 383OrcuttCalifornia 12
- 383Dodge CityKansas 12
- 383GreeleyColorado 12
- 383MillcreekUtah 12
- 383AnchorageAlaska 12
- 383Four CornersFlorida 12
- 397BearDelaware 12
- 397Safety HarborFlorida 12
- 397ScaggsvilleMaryland 12
- 397ZionIllinois 12
- 397Apple ValleyMinnesota 12
- 397AkronOhio 12
- 397AllentownPennsylvania 12
- 397JohnstownPennsylvania 12
- 397SuperiorWisconsin 12
- 397DavisCalifornia 12
- 397UkiahCalifornia 12
- 408LibertyMissouri 12
- 408SaginawTexas 12
- 408WaterburyConnecticut 12
- 408PortlandMaine 12
- 408La VistaNebraska 12
- 408PainesvilleOhio 12
- 408YoungstownOhio 12
- 408WeirtonWest Virginia 12
- 416FairhopeAlabama 12
- 416DoverDelaware 12
- 416Deerfield BeachFlorida 12
- 416Lake MaryFlorida 12
- 416Palm BayFlorida 12
- 416SarasotaFlorida 12
- 416EdgewoodMaryland 12
- 416ElktonMaryland 12
- 416SpringfieldOhio 12
- 416Port ArthurTexas 12
- 416TaylorTexas 12
- 416HartfordConnecticut 12
- 416SpringfieldMassachusetts 12
- 416Saint MichaelMinnesota 12
- 416BellevueNebraska 12
- 416LincolnNebraska 12
- 416Shaker HeightsOhio 12
- 416EriePennsylvania 12
- 416Santa CruzCalifornia 12
- 416Yuba CityCalifornia 12
- 416Las VegasNevada 12
- 437Delray BeachFlorida 10
- 437San MarcosTexas 10
- 437State CollegePennsylvania 10
- 437BrawleyCalifornia 10
- 437El CentroCalifornia 10
- 437IndioCalifornia 10
- 437RosevilleCalifornia 10
- 437MedfordOregon 10
- 445DavieFlorida 10
- 445WellingtonFlorida 10
- 445White OakOhio 10
- 445HollandMichigan 10
- 445ScrantonPennsylvania 10
- 445LubbockTexas 10
- 445Oxon Hill-GlassmanorMaryland 10
- 452NewarkDelaware 10
- 452East LakeFlorida 10
- 452La PorteTexas 10
- 452Saint CloudMinnesota 10
- 452OmahaNebraska 10
- 452BayonneNew Jersey 10
- 452RochesterNew York 10
- 452Casas AdobesArizona 10
- 452MaranaArizona 10
- 452GaltCalifornia 10
- 452WindsorColorado 10
- 463WestonFlorida 10
- 463LafayetteLouisiana 10
- 463Atlantic CityNew Jersey 10
- 463LebanonOhio 10
- 463LancasterCalifornia 10
- 463AlbuquerqueNew Mexico 10
- 463Rio RanchoNew Mexico 10
- 463West Valley CityUtah 10
- 471Fort ThomasKentucky 10
- 471PflugervilleTexas 10
- 471FraminghamMassachusetts 10
- 471HermitagePennsylvania 10
- 471McKeesportPennsylvania 10
- 471Upper Saint ClairPennsylvania 10
- 471Weirton HeightsWest Virginia 10
- 471LivermoreCalifornia 10
- 471Redwood CityCalifornia 10
- 471AltamontOregon 10
- 481BeltonTexas 10
- 481GalvestonTexas 10
- 481West FargoNorth Dakota 10
- 481VallejoCalifornia 10
- 481RandolphNew Jersey 10
- 486Cedar ParkTexas 10
- 486New LondonConnecticut 10
- 486BostonMassachusetts 10
- 486GreenfieldMassachusetts 10
- 486DuluthMinnesota 10
- 486UticaNew York 10
- 486Picnic Point-North LynnwoodWashington 10
- 493Coconut CreekFlorida 10
- 493South LaurelMaryland 10
- 493Fall RiverMassachusetts 10
- 493HaverhillMassachusetts 10
- 493LynnMassachusetts 10
- 493KeeneNew Hampshire 10
- 493NewburghNew York 10
- 493BanningCalifornia 10
- 493LincolnCalifornia 10
- 493Las CrucesNew Mexico 10
- 503TrentonNew Jersey 10
- 503GahannaOhio 10
- 503AltoonaPennsylvania 10
- 503GilroyCalifornia 10
- 503TemeculaCalifornia 10
- 503HermistonOregon 10
- 503YakimaWashington 10
- 510BrocktonMassachusetts 10
- 510ProvidenceRhode Island 10
- 510PleasantonCalifornia 10
- 510Thousand OaksCalifornia 10
- 510TracyCalifornia 10
- 515LowellMassachusetts 8
- 515WorcesterMassachusetts 8
- 515SyracuseNew York 8
- 515South San Franciscolow-cost sensorsCalifornia 8
- 515Cedar CityUtah 8
- 515OremUtah 8
- 515Columbia CityWashington 8
- 522RockvilleMaryland 8
- 522LimaOhio 8
- 522AberdeenSouth Dakota 8
- 522San RafaelCalifornia 8
- 522Seasidelow-cost sensorsCalifornia 8
- 522West JordanUtah 8
- 522HonoluluHawaii 8
- 529QuincyMassachusetts 8
- 529HollisterCalifornia 8
- 529ThorntonColorado 8
- 529Spring ValleyNevada 8
- 529BillingsMontana 8
- 529Salt Lake CityUtah 8
- 529Spanish ForkUtah 8
- 536HueytownAlabama 8
- 536PittsfieldMassachusetts 8
- 536White PlainsNew York 8
- 536ConcordCalifornia 8
- 536Grand JunctionColorado 8
- 541PleasantvilleNew Jersey 8
- 541PuebloColorado 8
- 541Fort CollinsColorado 8
- 544North ChicopeeMassachusetts 8
- 544LewistonMaine 8
- 544PortsmouthNew Hampshire 8
- 544ChicoCalifornia 8
- 544FolsomCalifornia 8
- 544Coeur d'AleneIdaho 8
- 544BozemanMontana 8
- 544Grants PassOregon 8
- 544AuburnWashington 8
- 544SeattleWashington 8
- 544SunnysideWashington 8
- 555AugustaMaine 8
- 555New CityNew York 8
- 555ReddingCalifornia 8
- 555HillsboroOregon 8
- 555HighlandUtah 8
- 555VancouverWashington 8
- 561Grand IslandNebraska 8
- 561Sioux FallsSouth Dakota 8
- 561Santa RosaCalifornia 8
- 561PocatelloIdaho 8
- 561ButteMontana 8
- 561Rapid CitySouth Dakota 8
- 567HagerstownMaryland 8
- 567MilfordMassachusetts 8
- 567BangorMaine 8
- 567AtascaderoCalifornia 8
- 567RidgecrestCalifornia 8
- 567VacavilleCalifornia 8
- 567Spanish SpringsNevada 8
- 567TigardOregon 8
- 567TacomaWashington 8
- 576HendersonNevada 8
- 576Twin FallsIdaho 8
- 578DerryNew Hampshire 7
- 578Lakewoodlow-cost sensorsColorado 7
- 578Idaho FallsIdaho 7
- 578MoscowIdaho 7
- 578HelenaMontana 7
- 578BountifulUtah 7
- 578MagnaUtah 7
- 578RentonWashington 7
- 586LaconiaNew Hampshire 7
- 586Windsorlow-cost sensorsCalifornia 7
- 586LongmontColorado 7
- 586AshlandOregon 7
- 590ParadiseCalifornia 7
- 590DenverColorado 7
- 590Ken CarylColorado 7
- 590EnterpriseNevada 7
- 590CanbyOregon 7
- 590HerrimanUtah 7
- 590EllensburgWashington 7
- 590LaceyWashington 7
- 590SpokaneWashington 7
- 590WenatcheeWashington 7
- 600Lexingtonlow-cost sensorsMassachusetts 7
- 600Carson CityNevada 7
- 600HurricaneUtah 7
- 600BellinghamWashington 7
- 600KīheiHawaii 7
- 605MarquetteMichigan 7
- 605Colorado SpringsColorado 7
- 605EugeneOregon 7
- 605TooeleUtah 7
- 605Spokane ValleyWashington 7
- 610Arvadalow-cost sensorsColorado 7
- 610MesquiteNevada 7
- 610Brigham CityUtah 7
- 613Boulder CityNevada 7
- 613GreshamOregon 7
- 613MilwaukieOregon 7
- 613The DallesOregon 7
- 613North OgdenUtah 7
- 613Summerlin SouthNevada 7
- 613Tri-CitiesWashington 7
- 620AlbanyOregon 7
- 620PortlandOregon 7
- 620WoodburnOregon 7
- 623Newtonlow-cost sensorsMassachusetts 7
- 623TruckeeCalifornia 7
- 623Cañon CityColorado 7
- 623RoseburgOregon 7
- 623SalemOregon 7
- 623HiloHawaii 7
- 629LompocCalifornia 7
- 629Oregon CityOregon 7
- 629Salmon CreekWashington 7
- 629KahuluiHawaii 7
- 633Green ValleyArizona 5
- 633MartinezCalifornia 5
- 633BeavertonOregon 5
- 633Coos BayOregon 5
- 633BurienWashington 5
- 633LongviewWashington 5
- 633Moses LakeWashington 5
- 633ShorelineWashington 5
- 641Palo Altolow-cost sensorsCalifornia 5
- 641PendletonOregon 5
- 641BremertonWashington 5
- 644BoulderColorado 5
- 644BoiseIdaho 5
- 644DallasOregon 5
- 647BendOregon 5
- 647CentraliaWashington 5
- 647ParklandWashington 5
- 647GilletteWyoming 5
- 647LaramieWyoming 5
- 647Rock SpringsWyoming 5
- 653RedmondOregon 5
- 654MissoulaMontana 5
- 654Walla WallaWashington 5
- 656CoventryRhode Island 5
- 656Forest GroveOregon 5
- 658AberdeenWashington 5
- 658KentWashington 5
- 660CorvallisOregon 5
- 660CheyenneWyoming 5
- 662PullmanWashington 3
- 663Oak HarborWashington 3
- 664McMinnvilleOregon 3
- 665BellevueWashington 3
- 665CasperWyoming 3
- 667Mount VernonWashington 2
- 668AnacortesWashington 2
- 668Union Hill-Novelty Hilllow-cost sensorsWashington 2
Good0–50
Satisfactory51–100
Moderate101–200
Poor201–300
Very poor301–400
Severe401+
India's National Air Quality Index (CPCB), PM2.5 sub-index. 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, March 2026 · United States now
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SmogRank, most polluted cities in United States, PM2.5, March 2026, smogrank.com/us/history/2026-03 (accessed 2 Oct 2026).
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