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 32.5
- 2CalexicoCalifornia 23.6
- 3Delanolow-cost sensorsCalifornia 19.3
- 4Tularelow-cost sensorsCalifornia 16.9
- 5AlbanyGeorgia 16.0
- 6MaconGeorgia 15.5
- 7Jurupa ValleyCalifornia 15.2
- 8PortervilleCalifornia 15.0
- 9BadgerAlaska 14.9
- 10RedfordMichigan 14.6
- 11BakersfieldCalifornia 14.3
- 11VisaliaCalifornia 14.3
- 13ColumbusGeorgia 13.9
- 13WhittierCalifornia 13.9
- 15AugustaGeorgia 13.6
- 15ChattanoogaTennessee 13.6
- 15El PasoTexas 13.6
- 18Hawthornelow-cost sensorsCalifornia 13.5
- 19Inglewoodlow-cost sensorsCalifornia 13.1
- 20WichitaKansas 13.0
- 21RiversideCalifornia 12.9
- 22Royal Oaklow-cost sensorsMichigan 12.8
- 22Los AngelesCalifornia 12.8
- 22Pasadenalow-cost sensorsCalifornia 12.8
- 25TallahasseeFlorida 12.7
- 25Wake Forestlow-cost sensorsNorth Carolina 12.7
- 25LaredoTexas 12.7
- 25FontanaCalifornia 12.7
- 29AthensGeorgia 12.6
- 30GadsdenAlabama 12.5
- 31Warner RobinsGeorgia 12.4
- 32MontgomeryAlabama 12.3
- 32Carsonlow-cost sensorsCalifornia 12.3
- 32ComptonCalifornia 12.3
- 32Candler-McAfeeGeorgia 12.3
- 36BrookfieldIllinois 12.2
- 37Santa Monicalow-cost sensorsCalifornia 12.1
- 38SocorroTexas 12.0
- 39OdessaTexas 11.9
- 40SpartanburgSouth Carolina 11.8
- 41East RidgeTennessee 11.7
- 41CorcoranCalifornia 11.7
- 41Huntington Beachlow-cost sensorsCalifornia 11.7
- 44ValdostaGeorgia 11.6
- 44Skokielow-cost sensorsIllinois 11.6
- 46Torrancelow-cost sensorsCalifornia 11.5
- 47DerbyKansas 11.4
- 47TopekaKansas 11.4
- 47Nileslow-cost sensorsIllinois 11.4
- 47FresnoCalifornia 11.4
- 51SpringdaleArkansas 11.3
- 51FairbanksAlaska 11.3
- 53AnaheimCalifornia 11.2
- 54BessemerAlabama 11.1
- 54TulsaOklahoma 11.1
- 56Ponca CityOklahoma 11.0
- 57Camdenlow-cost sensorsNew Jersey 10.9
- 57WaterlooIowa 10.9
- 57Evanstonlow-cost sensorsIllinois 10.9
- 57San DiegoCalifornia 10.9
- 61LawrencevilleGeorgia 10.8
- 61JacksonMississippi 10.8
- 61North CharlestonSouth Carolina 10.8
- 64BirminghamAlabama 10.7
- 64MissionTexas 10.7
- 64Blue Islandlow-cost sensorsIllinois 10.7
- 64Evergreen Parklow-cost sensorsIllinois 10.7
- 68HuntsvilleAlabama 10.6
- 68SavannahGeorgia 10.6
- 68FlorenceSouth Carolina 10.6
- 68GreenvilleSouth Carolina 10.6
- 68HanfordCalifornia 10.6
- 68Long BeachCalifornia 10.6
- 68Eagle PassTexas 10.6
- 75West MemphisArkansas 10.5
- 75MuscatineIowa 10.5
- 75BridgeviewIllinois 10.5
- 75Chula VistaCalifornia 10.5
- 79TrussvilleAlabama 10.4
- 79AshlandKentucky 10.4
- 79PhiladelphiaPennsylvania 10.4
- 82Little RockArkansas 10.3
- 82GainesvilleGeorgia 10.3
- 82Winston-SalemNorth Carolina 10.3
- 82WyomingMichigan 10.3
- 82Lomitalow-cost sensorsCalifornia 10.3
- 87AtlantaGeorgia 10.2
- 87CharlotteNorth Carolina 10.2
- 87Saint AndrewsSouth Carolina 10.2
- 87TexarkanaTexas 10.2
- 87Franklin ParkIllinois 10.2
- 87Brookfieldlow-cost sensorsWisconsin 10.2
- 87HobbsNew Mexico 10.2
- 94Granite CityIllinois 10.1
- 94HattiesburgMississippi 10.1
- 94Corpus ChristiTexas 10.1
- 94Abingtonlow-cost sensorsPennsylvania 10.1
- 94NogalesArizona 10.1
- 99DecaturAlabama 10.0
- 99ShreveportLouisiana 10.0
- 99BurbankCalifornia 10.0
- 102Saint JosephMissouri 9.9
- 102ClemmonsNorth Carolina 9.9
- 102LexingtonNorth Carolina 9.9
- 102MorrisvilleNorth Carolina 9.9
- 102JenksOklahoma 9.9
- 102ClintonIowa 9.9
- 102ElginIllinois 9.9
- 109MooreOklahoma 9.8
- 109KnoxvilleTennessee 9.8
- 109NashvilleTennessee 9.8
- 109Calumet CityIllinois 9.8
- 113OlatheKansas 9.7
- 113Columbialow-cost sensorsMissouri 9.7
- 113PortsmouthOhio 9.7
- 113HendersonvilleTennessee 9.7
- 113DoltonIllinois 9.7
- 113Oconomowoclow-cost sensorsWisconsin 9.7
- 119EvansvilleIndiana 9.6
- 119FayettevilleNorth Carolina 9.6
- 119BaytownTexas 9.6
- 119Iowa CityIowa 9.6
- 119Elmwood ParkIllinois 9.6
- 119PeoriaIllinois 9.6
- 119HammondIndiana 9.6
- 119Sunland ParkNew Mexico 9.6
- 127Kansas CityKansas 9.5
- 127YorkPennsylvania 9.5
- 127BrownsvilleTexas 9.5
- 127EdinburgTexas 9.5
- 127ChicagoIllinois 9.5
- 127Des PlainesIllinois 9.5
- 127FlintMichigan 9.5
- 127Santa BarbaraCalifornia 9.5
- 135BaltimoreMaryland 9.4
- 135Fort WayneIndiana 9.4
- 135Ann Arborlow-cost sensorsMichigan 9.4
- 135OceansideCalifornia 9.4
- 139Fort SmithArkansas 9.3
- 139MiddletownOhio 9.3
- 139Oklahoma CityOklahoma 9.3
- 139BrookingsSouth Dakota 9.3
- 139Agouralow-cost sensorsCalifornia 9.3
- 139OaklandCalifornia 9.3
- 145Upper AltonIllinois 9.2
- 145RockfordIllinois 9.2
- 145LebanonPennsylvania 9.2
- 145NipomoCalifornia 9.2
- 149New AlbanyIndiana 9.1
- 149LouisvilleKentucky 9.1
- 149St. LouisMissouri 9.1
- 149DurhamNorth Carolina 9.1
- 149HickoryNorth Carolina 9.1
- 149RaleighNorth Carolina 9.1
- 149MolineIllinois 9.1
- 156East Saint LouisIllinois 9.0
- 156Fort DodgeIowa 9.0
- 156ClevelandOhio 9.0
- 156LancasterPennsylvania 9.0
- 156MilwaukeeWisconsin 9.0
- 156Mission ViejoCalifornia 9.0
- 162OwensboroKentucky 8.9
- 162ColumbiaTennessee 8.9
- 162AuroraIllinois 8.9
- 162JolietIllinois 8.9
- 162ModestoCalifornia 8.9
- 162San FranciscoCalifornia 8.9
- 168JeffersonvilleIndiana 8.8
- 168SteubenvilleOhio 8.8
- 168WestervilleOhio 8.8
- 168WaukeshaWisconsin 8.8
- 168MercedCalifornia 8.8
- 168SalinasCalifornia 8.8
- 174Valley StationKentucky 8.7
- 174GreensboroNorth Carolina 8.7
- 174PennsaukenNew Jersey 8.7
- 174BartlettTennessee 8.7
- 174Cedar RapidsIowa 8.7
- 174DavenportIowa 8.7
- 174PerrysburgOhio 8.7
- 174El CajonCalifornia 8.7
- 174Great FallsMontana 8.7
- 183MonroeLouisiana 8.6
- 183EdmondOklahoma 8.6
- 183MaryvilleTennessee 8.6
- 183Encinitaslow-cost sensorsCalifornia 8.6
- 183MaderaCalifornia 8.6
- 183PowayCalifornia 8.6
- 183StocktonCalifornia 8.6
- 183MidwayFlorida 8.6
- 191Ferry PassFlorida 8.5
- 191McDonoughGeorgia 8.5
- 191Baton RougeLouisiana 8.5
- 191University CityMissouri 8.5
- 191AshevilleNorth Carolina 8.5
- 191ClarksvilleTennessee 8.5
- 191NapervilleIllinois 8.5
- 191Oak LawnIllinois 8.5
- 191ToledoOhio 8.5
- 200Kendale LakesFlorida 8.4
- 200Ponte Vedra BeachFlorida 8.4
- 200IndianapolisIndiana 8.4
- 200SpringfieldMissouri 8.4
- 200NorwoodOhio 8.4
- 200McAlesterOklahoma 8.4
- 200West MifflinPennsylvania 8.4
- 200GlendoraCalifornia 8.4
- 200San Luis ObispoCalifornia 8.4
- 209WilmingtonDelaware 8.3
- 209GulfportMississippi 8.3
- 209HernandoMississippi 8.3
- 209East ChicagoIndiana 8.3
- 209ElkhartIndiana 8.3
- 209Bay CityMichigan 8.3
- 209DetroitMichigan 8.3
- 209New York CityNew York 8.3
- 209OregonOhio 8.3
- 209PhoenixArizona 8.3
- 209TucsonArizona 8.3
- 209Lake ElsinoreCalifornia 8.3
- 221JeffersontownKentucky 8.2
- 221Live OakTexas 8.2
- 221Grand RapidsMichigan 8.2
- 221MadisonWisconsin 8.2
- 221Casa GrandeArizona 8.2
- 221San JoseCalifornia 8.2
- 227WashingtonDistrict of Columbia 8.1
- 227OcalaFlorida 8.1
- 227VeniceFlorida 8.1
- 227BrunswickGeorgia 8.1
- 227EssexMaryland 8.1
- 227LawtonOklahoma 8.1
- 227AustinTexas 8.1
- 227HoustonTexas 8.1
- 227CharlestonWest Virginia 8.1
- 227AnkenyIowa 8.1
- 227Des MoinesIowa 8.1
- 227ChampaignIllinois 8.1
- 227MinneapolisMinnesota 8.1
- 240PrichardAlabama 8.0
- 240DecaturIllinois 8.0
- 240BloomingtonIndiana 8.0
- 240JasperIndiana 8.0
- 240LemayMissouri 8.0
- 240ClaytonNorth Carolina 8.0
- 240CookevilleTennessee 8.0
- 240ConroeTexas 8.0
- 240HuntingtonWest Virginia 8.0
- 240South BendIndiana 8.0
- 240DearbornMichigan 8.0
- 240Lincoln ParkMichigan 8.0
- 240MankatoMinnesota 8.0
- 240HarrisburgPennsylvania 8.0
- 240RichmondCalifornia 8.0
- 240Santa ClaritaCalifornia 8.0
- 240Arden-ArcadeCalifornia 8.0
- 257St. PetersburgFlorida 7.9
- 257ElizabethtownKentucky 7.9
- 257JacksonTennessee 7.9
- 257San AntonioTexas 7.9
- 257ChesapeakeVirginia 7.9
- 257Michigan CityIndiana 7.9
- 257KalamazooMichigan 7.9
- 257ElizabethNew Jersey 7.9
- 257Jersey CityNew Jersey 7.9
- 257AppletonWisconsin 7.9
- 257NampaIdaho 7.9
- 268TampaFlorida 7.8
- 268Saint MatthewsKentucky 7.8
- 268Kansas CityMissouri 7.8
- 268ConwaySouth Carolina 7.8
- 268CharlottesvilleVirginia 7.8
- 268SpringfieldVirginia 7.8
- 268JenisonMichigan 7.8
- 268Saint PaulMinnesota 7.8
- 268Fort LeeNew Jersey 7.8
- 268CarlislePennsylvania 7.8
- 268San LeandroCalifornia 7.8
- 268WoodlandCalifornia 7.8
- 280Oak RidgeFlorida 7.7
- 280Palm CityFlorida 7.7
- 280SpringfieldIllinois 7.7
- 280PascagoulaMississippi 7.7
- 280KingsportTennessee 7.7
- 280RichmondVirginia 7.7
- 280CaryIllinois 7.7
- 280PatersonNew Jersey 7.7
- 280WatertownSouth Dakota 7.7
- 280Green BayWisconsin 7.7
- 280MantecaCalifornia 7.7
- 291Bonita SpringsFlorida 7.6
- 291Fort LauderdaleFlorida 7.6
- 291MiamiFlorida 7.6
- 291LeawoodKansas 7.6
- 291GreenvilleNorth Carolina 7.6
- 291Toms RiverNew Jersey 7.6
- 291PasadenaTexas 7.6
- 291HopewellVirginia 7.6
- 291ReadingPennsylvania 7.6
- 291Middletonlow-cost sensorsWisconsin 7.6
- 291ClovisCalifornia 7.6
- 291Simi ValleyCalifornia 7.6
- 303JacksonvilleFlorida 7.5
- 303ValricoFlorida 7.5
- 303New OrleansLouisiana 7.5
- 303RaymoreMissouri 7.5
- 303Roanoke RapidsNorth Carolina 7.5
- 303ColumbusOhio 7.5
- 303ChesterPennsylvania 7.5
- 303New HavenConnecticut 7.5
- 303BloomingtonIllinois 7.5
- 303South MilwaukeeWisconsin 7.5
- 303MesaArizona 7.5
- 303TurlockCalifornia 7.5
- 315LansingMichigan 7.4
- 315BurnsvilleMinnesota 7.4
- 315BuffaloNew York 7.4
- 315NorristownPennsylvania 7.4
- 315Arroyo GrandeCalifornia 7.4
- 315Florinlow-cost sensorsCalifornia 7.4
- 321PaducahKentucky 7.3
- 321KennerLouisiana 7.3
- 321ArnoldMissouri 7.3
- 321South VinelandNew Jersey 7.3
- 321Fort WorthTexas 7.3
- 321AshburnVirginia 7.3
- 321MuncieIndiana 7.3
- 321EastpointeMichigan 7.3
- 321Port HuronMichigan 7.3
- 321EwingNew Jersey 7.3
- 321RutlandVermont 7.3
- 321BridgeportConnecticut 7.3
- 321Goletalow-cost sensorsCalifornia 7.3
- 321Apache JunctionArizona 7.3
- 321LewistonIdaho 7.3
- 336Daytona BeachFlorida 7.2
- 336CincinnatiOhio 7.2
- 336DyersburgTennessee 7.2
- 336East HamptonVirginia 7.2
- 336Short PumpVirginia 7.2
- 336BlaineMinnesota 7.2
- 336DublinOhio 7.2
- 336WarrenOhio 7.2
- 336PaysonArizona 7.2
- 345Pompano BeachFlorida 7.1
- 345Lexington-FayetteKentucky 7.1
- 345NicholasvilleKentucky 7.1
- 345ChalmetteLouisiana 7.1
- 345DaytonOhio 7.1
- 345RoanokeVirginia 7.1
- 345SalemVirginia 7.1
- 345SouthfieldMichigan 7.1
- 345YpsilantiMichigan 7.1
- 345LindenNew Jersey 7.1
- 345Eau ClaireWisconsin 7.1
- 345TempeArizona 7.1
- 345BerkeleyCalifornia 7.1
- 345SacramentoCalifornia 7.1
- 345La Crescenta-Montroselow-cost sensorsCalifornia 7.1
- 360Hunt ValleyMaryland 7.0
- 360Rose HillVirginia 7.0
- 360AndersonIndiana 7.0
- 360RochesterMinnesota 7.0
- 360AlbanyNew York 7.0
- 360HolbrookNew York 7.0
- 360CantonOhio 7.0
- 360PittsburghPennsylvania 7.0
- 360GlendaleArizona 7.0
- 369Belle GladeFlorida 6.9
- 369Fruit CoveFlorida 6.9
- 369OrlandoFlorida 6.9
- 369West PensacolaFlorida 6.9
- 369DanburyConnecticut 6.9
- 369Cleveland HeightsOhio 6.9
- 369NorthbrookIllinois 6.9
- 369TaylorMichigan 6.9
- 369ShakopeeMinnesota 6.9
- 369MedinaOhio 6.9
- 369WilkinsburgPennsylvania 6.9
- 369YumaArizona 6.9
- 369OxnardCalifornia 6.9
- 369RenoNevada 6.9
- 383Fort MyersFlorida 6.8
- 383GainesvilleFlorida 6.8
- 383SewellNew Jersey 6.8
- 383MasonOhio 6.8
- 383College StationTexas 6.8
- 383CorsicanaTexas 6.8
- 383Mission BendTexas 6.8
- 383FillmoreCalifornia 6.8
- 383OrcuttCalifornia 6.8
- 383Dodge CityKansas 6.8
- 383GreeleyColorado 6.8
- 383MillcreekUtah 6.8
- 383AnchorageAlaska 6.8
- 383Four CornersFlorida 6.8
- 397BearDelaware 6.7
- 397Safety HarborFlorida 6.7
- 397ScaggsvilleMaryland 6.7
- 397ZionIllinois 6.7
- 397Apple ValleyMinnesota 6.7
- 397AkronOhio 6.7
- 397AllentownPennsylvania 6.7
- 397JohnstownPennsylvania 6.7
- 397SuperiorWisconsin 6.7
- 397DavisCalifornia 6.7
- 397UkiahCalifornia 6.7
- 408LibertyMissouri 6.6
- 408SaginawTexas 6.6
- 408WaterburyConnecticut 6.6
- 408PortlandMaine 6.6
- 408La VistaNebraska 6.6
- 408PainesvilleOhio 6.6
- 408YoungstownOhio 6.6
- 408WeirtonWest Virginia 6.6
- 416FairhopeAlabama 6.5
- 416DoverDelaware 6.5
- 416Deerfield BeachFlorida 6.5
- 416Lake MaryFlorida 6.5
- 416Palm BayFlorida 6.5
- 416SarasotaFlorida 6.5
- 416EdgewoodMaryland 6.5
- 416ElktonMaryland 6.5
- 416SpringfieldOhio 6.5
- 416Port ArthurTexas 6.5
- 416TaylorTexas 6.5
- 416HartfordConnecticut 6.5
- 416SpringfieldMassachusetts 6.5
- 416Saint MichaelMinnesota 6.5
- 416BellevueNebraska 6.5
- 416LincolnNebraska 6.5
- 416Shaker HeightsOhio 6.5
- 416EriePennsylvania 6.5
- 416Santa CruzCalifornia 6.5
- 416Yuba CityCalifornia 6.5
- 416Las VegasNevada 6.5
- 437Delray BeachFlorida 6.4
- 437San MarcosTexas 6.4
- 437State CollegePennsylvania 6.4
- 437BrawleyCalifornia 6.4
- 437El CentroCalifornia 6.4
- 437IndioCalifornia 6.4
- 437RosevilleCalifornia 6.4
- 437MedfordOregon 6.4
- 445DavieFlorida 6.3
- 445WellingtonFlorida 6.3
- 445White OakOhio 6.3
- 445HollandMichigan 6.3
- 445ScrantonPennsylvania 6.3
- 445LubbockTexas 6.3
- 445Oxon Hill-GlassmanorMaryland 6.3
- 452NewarkDelaware 6.2
- 452East LakeFlorida 6.2
- 452La PorteTexas 6.2
- 452Saint CloudMinnesota 6.2
- 452OmahaNebraska 6.2
- 452BayonneNew Jersey 6.2
- 452RochesterNew York 6.2
- 452Casas AdobesArizona 6.2
- 452MaranaArizona 6.2
- 452GaltCalifornia 6.2
- 452WindsorColorado 6.2
- 463WestonFlorida 6.1
- 463LafayetteLouisiana 6.1
- 463Atlantic CityNew Jersey 6.1
- 463LebanonOhio 6.1
- 463LancasterCalifornia 6.1
- 463AlbuquerqueNew Mexico 6.1
- 463Rio RanchoNew Mexico 6.1
- 463West Valley CityUtah 6.1
- 471Fort ThomasKentucky 6.0
- 471PflugervilleTexas 6.0
- 471FraminghamMassachusetts 6.0
- 471HermitagePennsylvania 6.0
- 471McKeesportPennsylvania 6.0
- 471Upper Saint ClairPennsylvania 6.0
- 471Weirton HeightsWest Virginia 6.0
- 471LivermoreCalifornia 6.0
- 471Redwood CityCalifornia 6.0
- 471AltamontOregon 6.0
- 481BeltonTexas 5.9
- 481GalvestonTexas 5.9
- 481West FargoNorth Dakota 5.9
- 481VallejoCalifornia 5.9
- 481RandolphNew Jersey 5.9
- 486Cedar ParkTexas 5.8
- 486New LondonConnecticut 5.8
- 486BostonMassachusetts 5.8
- 486GreenfieldMassachusetts 5.8
- 486DuluthMinnesota 5.8
- 486UticaNew York 5.8
- 486Picnic Point-North LynnwoodWashington 5.8
- 493Coconut CreekFlorida 5.7
- 493South LaurelMaryland 5.7
- 493Fall RiverMassachusetts 5.7
- 493HaverhillMassachusetts 5.7
- 493LynnMassachusetts 5.7
- 493KeeneNew Hampshire 5.7
- 493NewburghNew York 5.7
- 493BanningCalifornia 5.7
- 493LincolnCalifornia 5.7
- 493Las CrucesNew Mexico 5.7
- 503TrentonNew Jersey 5.6
- 503GahannaOhio 5.6
- 503AltoonaPennsylvania 5.6
- 503GilroyCalifornia 5.6
- 503TemeculaCalifornia 5.6
- 503HermistonOregon 5.6
- 503YakimaWashington 5.6
- 510BrocktonMassachusetts 5.5
- 510ProvidenceRhode Island 5.5
- 510PleasantonCalifornia 5.5
- 510Thousand OaksCalifornia 5.5
- 510TracyCalifornia 5.5
- 515LowellMassachusetts 5.4
- 515WorcesterMassachusetts 5.4
- 515SyracuseNew York 5.4
- 515South San Franciscolow-cost sensorsCalifornia 5.4
- 515Cedar CityUtah 5.4
- 515OremUtah 5.4
- 515Columbia CityWashington 5.4
- 522RockvilleMaryland 5.3
- 522LimaOhio 5.3
- 522AberdeenSouth Dakota 5.3
- 522San RafaelCalifornia 5.3
- 522Seasidelow-cost sensorsCalifornia 5.3
- 522West JordanUtah 5.3
- 522HonoluluHawaii 5.3
- 529QuincyMassachusetts 5.2
- 529HollisterCalifornia 5.2
- 529ThorntonColorado 5.2
- 529Spring ValleyNevada 5.2
- 529BillingsMontana 5.2
- 529Salt Lake CityUtah 5.2
- 529Spanish ForkUtah 5.2
- 536HueytownAlabama 5.1
- 536PittsfieldMassachusetts 5.1
- 536White PlainsNew York 5.1
- 536ConcordCalifornia 5.1
- 536Grand JunctionColorado 5.1
- 541PleasantvilleNew Jersey 5.0
- 541PuebloColorado 5.0
- 541Fort CollinsColorado 5.0
- 544North ChicopeeMassachusetts 4.9
- 544LewistonMaine 4.9
- 544PortsmouthNew Hampshire 4.9
- 544ChicoCalifornia 4.9
- 544FolsomCalifornia 4.9
- 544Coeur d'AleneIdaho 4.9
- 544BozemanMontana 4.9
- 544Grants PassOregon 4.9
- 544AuburnWashington 4.9
- 544SeattleWashington 4.9
- 544SunnysideWashington 4.9
- 555AugustaMaine 4.8
- 555New CityNew York 4.8
- 555ReddingCalifornia 4.8
- 555HillsboroOregon 4.8
- 555HighlandUtah 4.8
- 555VancouverWashington 4.8
- 561Grand IslandNebraska 4.7
- 561Sioux FallsSouth Dakota 4.7
- 561Santa RosaCalifornia 4.7
- 561PocatelloIdaho 4.7
- 561ButteMontana 4.7
- 561Rapid CitySouth Dakota 4.7
- 567HagerstownMaryland 4.6
- 567MilfordMassachusetts 4.6
- 567BangorMaine 4.6
- 567AtascaderoCalifornia 4.6
- 567RidgecrestCalifornia 4.6
- 567VacavilleCalifornia 4.6
- 567Spanish SpringsNevada 4.6
- 567TigardOregon 4.6
- 567TacomaWashington 4.6
- 576HendersonNevada 4.5
- 576Twin FallsIdaho 4.5
- 578DerryNew Hampshire 4.4
- 578Lakewoodlow-cost sensorsColorado 4.4
- 578Idaho FallsIdaho 4.4
- 578MoscowIdaho 4.4
- 578HelenaMontana 4.4
- 578BountifulUtah 4.4
- 578MagnaUtah 4.4
- 578RentonWashington 4.4
- 586LaconiaNew Hampshire 4.3
- 586Windsorlow-cost sensorsCalifornia 4.3
- 586LongmontColorado 4.3
- 586AshlandOregon 4.3
- 590ParadiseCalifornia 4.2
- 590DenverColorado 4.2
- 590Ken CarylColorado 4.2
- 590EnterpriseNevada 4.2
- 590CanbyOregon 4.2
- 590HerrimanUtah 4.2
- 590EllensburgWashington 4.2
- 590LaceyWashington 4.2
- 590SpokaneWashington 4.2
- 590WenatcheeWashington 4.2
- 600Lexingtonlow-cost sensorsMassachusetts 4.1
- 600Carson CityNevada 4.1
- 600HurricaneUtah 4.1
- 600BellinghamWashington 4.1
- 600KīheiHawaii 4.1
- 605MarquetteMichigan 4.0
- 605Colorado SpringsColorado 4.0
- 605EugeneOregon 4.0
- 605TooeleUtah 4.0
- 605Spokane ValleyWashington 4.0
- 610Arvadalow-cost sensorsColorado 3.9
- 610MesquiteNevada 3.9
- 610Brigham CityUtah 3.9
- 613Boulder CityNevada 3.8
- 613GreshamOregon 3.8
- 613MilwaukieOregon 3.8
- 613The DallesOregon 3.8
- 613North OgdenUtah 3.8
- 613Summerlin SouthNevada 3.8
- 613Tri-CitiesWashington 3.8
- 620AlbanyOregon 3.7
- 620PortlandOregon 3.7
- 620WoodburnOregon 3.7
- 623Newtonlow-cost sensorsMassachusetts 3.6
- 623TruckeeCalifornia 3.6
- 623Cañon CityColorado 3.6
- 623RoseburgOregon 3.6
- 623SalemOregon 3.6
- 623HiloHawaii 3.6
- 629LompocCalifornia 3.5
- 629Oregon CityOregon 3.5
- 629Salmon CreekWashington 3.5
- 629KahuluiHawaii 3.5
- 633Green ValleyArizona 3.4
- 633MartinezCalifornia 3.4
- 633BeavertonOregon 3.4
- 633Coos BayOregon 3.4
- 633BurienWashington 3.4
- 633LongviewWashington 3.4
- 633Moses LakeWashington 3.4
- 633ShorelineWashington 3.4
- 641Palo Altolow-cost sensorsCalifornia 3.3
- 641PendletonOregon 3.3
- 641BremertonWashington 3.3
- 644BoulderColorado 3.2
- 644BoiseIdaho 3.2
- 644DallasOregon 3.2
- 647BendOregon 3.1
- 647CentraliaWashington 3.1
- 647ParklandWashington 3.1
- 647GilletteWyoming 3.1
- 647LaramieWyoming 3.1
- 647Rock SpringsWyoming 3.1
- 653RedmondOregon 2.9
- 654MissoulaMontana 2.8
- 654Walla WallaWashington 2.8
- 656CoventryRhode Island 2.7
- 656Forest GroveOregon 2.7
- 658AberdeenWashington 2.6
- 658KentWashington 2.6
- 660CorvallisOregon 2.5
- 660CheyenneWyoming 2.5
- 662PullmanWashington 2.3
- 663Oak HarborWashington 2.2
- 664McMinnvilleOregon 1.9
- 665BellevueWashington 1.7
- 665CasperWyoming 1.7
- 667Mount VernonWashington 1.3
- 668AnacortesWashington 1.2
- 668Union Hill-Novelty Hilllow-cost sensorsWashington 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+
PM2.5 in µg/m³, coloured by the US EPA's PM2.5 categories. 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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