SmogRank / Countries / United States / March 2024
Most polluted cities in United States, March 2024
596 cities in United States ranked by their average PM2.5 over the 31 days. Worst: Baytown at 16.4 µg/m³, #153 of 1,432 cities in the world. Cleanest: Marysville at 1.0. A city needs measurements on 70% of the days to be ranked.
- 1BaytownTexas 16.4
- 2MissionTexas 15.3
- 3EdinburgTexas 14.1
- 4Kansas CityKansas 13.0
- 5BirminghamAlabama 12.5
- 6Ponca CityOklahoma 12.0
- 7LaredoTexas 11.6
- 8AlbanyGeorgia 11.4
- 8BrownsvilleTexas 11.4
- 10JenksOklahoma 11.2
- 11ConroeTexas 11.1
- 11Corpus ChristiTexas 11.1
- 11BadgerAlaska 11.1
- 14ColumbusGeorgia 11.0
- 15Saint AndrewsSouth Carolina 10.8
- 16HoustonTexas 10.7
- 17BartlettTennessee 10.3
- 18Missouri CityTexas 10.2
- 19Live OakTexas 10.1
- 20HueytownAlabama 10.0
- 20TrussvilleAlabama 10.0
- 20DurhamNorth Carolina 10.0
- 20AustinTexas 10.0
- 20RedfordMichigan 10.0
- 25Fort SmithArkansas 9.9
- 25MiamiFlorida 9.9
- 25KennesawGeorgia 9.9
- 25Granite CityIllinois 9.9
- 25TulsaOklahoma 9.9
- 25FlorenceSouth Carolina 9.9
- 25PasadenaTexas 9.9
- 32Phenix CityAlabama 9.8
- 32SpringdaleArkansas 9.8
- 32Forest ParkGeorgia 9.8
- 32MaconGeorgia 9.8
- 32DearbornMichigan 9.8
- 37GainesvilleGeorgia 9.7
- 37MooreOklahoma 9.7
- 37DallasTexas 9.7
- 40San AntonioTexas 9.6
- 41AugustaGeorgia 9.5
- 41Oklahoma CityOklahoma 9.5
- 43ValdostaGeorgia 9.4
- 43St. LouisMissouri 9.4
- 45OlatheKansas 9.3
- 45SpartanburgSouth Carolina 9.3
- 45CorsicanaTexas 9.3
- 48East Saint LouisIllinois 9.2
- 48East RidgeTennessee 9.2
- 48Mission BendTexas 9.2
- 48Great FallsMontana 9.2
- 52OcalaFlorida 9.1
- 53LawrencevilleGeorgia 9.0
- 53Warner RobinsGeorgia 9.0
- 55AthensGeorgia 8.9
- 55DerbyKansas 8.9
- 55GreenvilleSouth Carolina 8.9
- 55ToledoOhio 8.9
- 55El PasoTexas 8.9
- 60SavannahGeorgia 8.8
- 60Saint JosephMissouri 8.8
- 60Fort WorthTexas 8.8
- 60SaginawTexas 8.8
- 60BensalemPennsylvania 8.8
- 65IndianapolisIndiana 8.7
- 65Terre HauteIndiana 8.7
- 65Eagle PassTexas 8.7
- 68Fort LauderdaleFlorida 8.6
- 68HickoryNorth Carolina 8.6
- 70Oak LawnIllinois 8.5
- 70HollandMichigan 8.5
- 70SocorroTexas 8.5
- 73CharlotteNorth Carolina 8.4
- 73TexarkanaTexas 8.4
- 73East ChicagoIndiana 8.4
- 73ClevelandOhio 8.4
- 73Candler-McAfeeGeorgia 8.4
- 78EvansvilleIndiana 8.3
- 78SulphurLouisiana 8.3
- 78EdmondOklahoma 8.3
- 78ConwaySouth Carolina 8.3
- 78Port ArthurTexas 8.3
- 78Lincoln ParkMichigan 8.3
- 84Bonita SpringsFlorida 8.2
- 84East LakeFlorida 8.2
- 86Ponte Vedra BeachFlorida 8.1
- 86VeniceFlorida 8.1
- 86SpringfieldMissouri 8.1
- 86ColumbusOhio 8.1
- 86McAlesterOklahoma 8.1
- 86KnoxvilleTennessee 8.1
- 86BeltonTexas 8.1
- 86College StationTexas 8.1
- 86DentonTexas 8.1
- 86KalamazooMichigan 8.1
- 86UkiahCalifornia 8.1
- 86MidwayFlorida 8.1
- 98Little RockArkansas 8.0
- 98AtlantaGeorgia 8.0
- 98MiddletownOhio 8.0
- 101GadsdenAlabama 7.9
- 101West MemphisArkansas 7.9
- 101ValricoFlorida 7.9
- 101JeffersonvilleIndiana 7.9
- 101OremUtah 7.9
- 106Belle GladeFlorida 7.8
- 106HernandoMississippi 7.8
- 106NorwoodOhio 7.8
- 106North CharlestonSouth Carolina 7.8
- 106WaterlooIowa 7.8
- 106Fort WayneIndiana 7.8
- 106Los AngelesCalifornia 7.8
- 113TallahasseeFlorida 7.7
- 113BrunswickGeorgia 7.7
- 113JasperIndiana 7.7
- 113LafayetteLouisiana 7.7
- 113HendersonvilleTennessee 7.7
- 113AnkenyIowa 7.7
- 113EastpointeMichigan 7.7
- 120PrichardAlabama 7.6
- 120Coconut CreekFlorida 7.6
- 120Daytona BeachFlorida 7.6
- 120NapervilleIllinois 7.6
- 120ElkhartIndiana 7.6
- 120AnaheimCalifornia 7.6
- 126Baton RougeLouisiana 7.5
- 126HattiesburgMississippi 7.5
- 126ClintonIowa 7.5
- 126Iowa CityIowa 7.5
- 126DetroitMichigan 7.5
- 126West MifflinPennsylvania 7.5
- 132HomesteadFlorida 7.4
- 132JacksonvilleFlorida 7.4
- 132DecaturIllinois 7.4
- 132SpringfieldIllinois 7.4
- 132JacksonMississippi 7.4
- 132PascagoulaMississippi 7.4
- 132NashvilleTennessee 7.4
- 132La PorteTexas 7.4
- 132BellevueNebraska 7.4
- 132WestervilleOhio 7.4
- 142MontgomeryAlabama 7.3
- 142Winter ParkFlorida 7.3
- 142Kansas CityMissouri 7.3
- 142University CityMissouri 7.3
- 142ClaytonNorth Carolina 7.3
- 142DavenportIowa 7.3
- 142BloomingtonIllinois 7.3
- 142MuncieIndiana 7.3
- 142MilwaukieOregon 7.3
- 151Ferry PassFlorida 7.2
- 151Lake MaryFlorida 7.2
- 151Upper AltonIllinois 7.2
- 151LemayMissouri 7.2
- 151ClemmonsNorth Carolina 7.2
- 151MorrisvilleNorth Carolina 7.2
- 151CincinnatiOhio 7.2
- 151White OakOhio 7.2
- 151ChattanoogaTennessee 7.2
- 151ColumbiaTennessee 7.2
- 151BrookfieldIllinois 7.2
- 151ChicagoIllinois 7.2
- 151LafayetteIndiana 7.2
- 151ComptonCalifornia 7.2
- 165DecaturAlabama 7.1
- 165ArnoldMissouri 7.1
- 165GreensboroNorth Carolina 7.1
- 165Winston-SalemNorth Carolina 7.1
- 165LawtonOklahoma 7.1
- 165PeoriaIllinois 7.1
- 165Grand RapidsMichigan 7.1
- 165CantonOhio 7.1
- 173Deerfield BeachFlorida 7.0
- 173TampaFlorida 7.0
- 173McDonoughGeorgia 7.0
- 173LouisvilleKentucky 7.0
- 173Valley StationKentucky 7.0
- 173RaleighNorth Carolina 7.0
- 173HarrisonburgVirginia 7.0
- 173KokomoIndiana 7.0
- 173South BendIndiana 7.0
- 173OmahaNebraska 7.0
- 173Hawthornelow-cost sensorsCalifornia 7.0
- 173Jurupa ValleyCalifornia 7.0
- 173Santa ClaritaCalifornia 7.0
- 173HelenaMontana 7.0
- 173RentonWashington 7.0
- 188HuntsvilleAlabama 6.9
- 188LakelandFlorida 6.9
- 188PortsmouthOhio 6.9
- 188MaryvilleTennessee 6.9
- 188Calumet CityIllinois 6.9
- 188Franklin ParkIllinois 6.9
- 188DublinOhio 6.9
- 188FontanaCalifornia 6.9
- 196PaducahKentucky 6.8
- 196RaymoreMissouri 6.8
- 196FayettevilleNorth Carolina 6.8
- 196LexingtonNorth Carolina 6.8
- 196DaytonOhio 6.8
- 196SpringfieldOhio 6.8
- 196PhiladelphiaPennsylvania 6.8
- 196GaryIndiana 6.8
- 196LancasterPennsylvania 6.8
- 196BurbankCalifornia 6.8
- 196Chula VistaCalifornia 6.8
- 196DenverColorado 6.8
- 196Dodge CityKansas 6.8
- 196Columbia CityWashington 6.8
- 210BloomingtonIndiana 6.7
- 210ColumbusIndiana 6.7
- 210TaylorMichigan 6.7
- 210LimaOhio 6.7
- 210Carsonlow-cost sensorsCalifornia 6.7
- 210San DiegoCalifornia 6.7
- 210OdessaTexas 6.7
- 210FairbanksAlaska 6.7
- 218KennerLouisiana 6.6
- 218Des MoinesIowa 6.6
- 218AndersonIndiana 6.6
- 218Bay CityMichigan 6.6
- 218NogalesArizona 6.6
- 223Delray BeachFlorida 6.5
- 223SarasotaFlorida 6.5
- 223GulfportMississippi 6.5
- 223ClarksvilleTennessee 6.5
- 223DyersburgTennessee 6.5
- 223HuntingtonWest Virginia 6.5
- 223MuscatineIowa 6.5
- 223RockfordIllinois 6.5
- 223YpsilantiMichigan 6.5
- 223AkronOhio 6.5
- 223MedinaOhio 6.5
- 223WatertownSouth Dakota 6.5
- 235JeffersontownKentucky 6.4
- 235CharlottesvilleVirginia 6.4
- 235MolineIllinois 6.4
- 235EwingNew Jersey 6.4
- 235Inglewoodlow-cost sensorsCalifornia 6.4
- 235ThorntonColorado 6.4
- 241Fruit CoveFlorida 6.3
- 241WellingtonFlorida 6.3
- 241JenisonMichigan 6.3
- 241SteubenvilleOhio 6.3
- 241HarrisburgPennsylvania 6.3
- 241LebanonPennsylvania 6.3
- 241Casa GrandeArizona 6.3
- 241RiversideCalifornia 6.3
- 241StocktonCalifornia 6.3
- 241ParklandWashington 6.3
- 251NewarkDelaware 6.2
- 251Palm CityFlorida 6.2
- 251ElizabethtownKentucky 6.2
- 251ChalmetteLouisiana 6.2
- 251JacksonTennessee 6.2
- 251HammondIndiana 6.2
- 251LindenNew Jersey 6.2
- 251Shaker HeightsOhio 6.2
- 251WarrenOhio 6.2
- 251McKeesportPennsylvania 6.2
- 251WilkinsburgPennsylvania 6.2
- 251Torrancelow-cost sensorsCalifornia 6.2
- 251MillcreekUtah 6.2
- 251La Crescenta-Montroselow-cost sensorsCalifornia 6.2
- 265FishersIndiana 6.1
- 265Saint MatthewsKentucky 6.1
- 265CookevilleTennessee 6.1
- 265Port HuronMichigan 6.1
- 265WheelingWest Virginia 6.1
- 265FresnoCalifornia 6.1
- 265Santa Monicalow-cost sensorsCalifornia 6.1
- 272GainesvilleFlorida 6.0
- 272AshlandKentucky 6.0
- 272GreenvilleNorth Carolina 6.0
- 272YorkPennsylvania 6.0
- 272Cleveland HeightsOhio 6.0
- 272Grand IslandNebraska 6.0
- 272LincolnNebraska 6.0
- 272New York CityNew York 6.0
- 272YoungstownOhio 6.0
- 272PittsburghPennsylvania 6.0
- 272MilwaukeeWisconsin 6.0
- 272YumaArizona 6.0
- 272LewistonIdaho 6.0
- 272GreshamOregon 6.0
- 286FairhopeAlabama 5.9
- 286Safety HarborFlorida 5.9
- 286New AlbanyIndiana 5.9
- 286AdaOklahoma 5.9
- 286CharlestonWest Virginia 5.9
- 286NorthbrookIllinois 5.9
- 286South MilwaukeeWisconsin 5.9
- 286IndioCalifornia 5.9
- 294Palm BayFlorida 5.8
- 294Fort ThomasKentucky 5.8
- 294LibertyMissouri 5.8
- 294PennsaukenNew Jersey 5.8
- 294ChesapeakeVirginia 5.8
- 294Des PlainesIllinois 5.8
- 294ShakopeeMinnesota 5.8
- 294Agouralow-cost sensorsCalifornia 5.8
- 294West JordanUtah 5.8
- 294TacomaWashington 5.8
- 304AshevilleNorth Carolina 5.7
- 304Toms RiverNew Jersey 5.7
- 304PortageIndiana 5.7
- 304LansingMichigan 5.7
- 304CarlislePennsylvania 5.7
- 304WeirtonWest Virginia 5.7
- 304HanfordCalifornia 5.7
- 304HobbsNew Mexico 5.7
- 304BismarckNorth Dakota 5.7
- 313AshburnVirginia 5.6
- 313ReadingPennsylvania 5.6
- 313MadisonWisconsin 5.6
- 313PhoenixArizona 5.6
- 313Arroyo GrandeCalifornia 5.6
- 313BanningCalifornia 5.6
- 313AmarilloTexas 5.6
- 313BillingsMontana 5.6
- 313SeattleWashington 5.6
- 322Roanoke RapidsNorth Carolina 5.5
- 322LebanonOhio 5.5
- 322PatersonNew Jersey 5.5
- 322PainesvilleOhio 5.5
- 322BethlehemPennsylvania 5.5
- 322JohnstownPennsylvania 5.5
- 322Lomitalow-cost sensorsCalifornia 5.5
- 322MedfordOregon 5.5
- 322BellinghamWashington 5.5
- 331Lexington-FayetteKentucky 5.4
- 331New OrleansLouisiana 5.4
- 331ChesterPennsylvania 5.4
- 331East HamptonVirginia 5.4
- 331RichmondVirginia 5.4
- 331ZionIllinois 5.4
- 331BurnsvilleMinnesota 5.4
- 331MinneapolisMinnesota 5.4
- 331Fort LeeNew Jersey 5.4
- 331El CajonCalifornia 5.4
- 331VictorvilleCalifornia 5.4
- 331LongmontColorado 5.4
- 331ButteMontana 5.4
- 344WilmingtonDelaware 5.3
- 344KingsportTennessee 5.3
- 344GalvestonTexas 5.3
- 344BuffaloNew York 5.3
- 344HermitagePennsylvania 5.3
- 344NorristownPennsylvania 5.3
- 344WaukeshaWisconsin 5.3
- 344CalexicoCalifornia 5.3
- 344GlendoraCalifornia 5.3
- 344OceansideCalifornia 5.3
- 344PortervilleCalifornia 5.3
- 344Simi ValleyCalifornia 5.3
- 344RoseburgOregon 5.3
- 357WestonFlorida 5.2
- 357PleasantvilleNew Jersey 5.2
- 357SewellNew Jersey 5.2
- 357SpringfieldVirginia 5.2
- 357CaryIllinois 5.2
- 357TurlockCalifornia 5.2
- 357Fort CollinsColorado 5.2
- 357GreeleyColorado 5.2
- 357Salt Lake CityUtah 5.2
- 366RochesterMinnesota 5.1
- 366ScrantonPennsylvania 5.1
- 366State CollegePennsylvania 5.1
- 366RutlandVermont 5.1
- 366Eau ClaireWisconsin 5.1
- 366CorcoranCalifornia 5.1
- 366VisaliaCalifornia 5.1
- 366NampaIdaho 5.1
- 366Port AngelesWashington 5.1
- 375BaltimoreMaryland 5.0
- 375Hunt ValleyMaryland 5.0
- 375RoanokeVirginia 5.0
- 375Rose HillVirginia 5.0
- 375Jersey CityNew Jersey 5.0
- 375AllentownPennsylvania 5.0
- 375Casas AdobesArizona 5.0
- 375MaranaArizona 5.0
- 375ModestoCalifornia 5.0
- 375OaklandCalifornia 5.0
- 375PowayCalifornia 5.0
- 375Santa CruzCalifornia 5.0
- 375SalemOregon 5.0
- 388WashingtonDistrict of Columbia 4.9
- 388DoverDelaware 4.9
- 388Apple ValleyMinnesota 4.9
- 388Saint CloudMinnesota 4.9
- 388Saint MichaelMinnesota 4.9
- 388Saint PaulMinnesota 4.9
- 388RochesterNew York 4.9
- 388GahannaOhio 4.9
- 388Weirton HeightsWest Virginia 4.9
- 388SunnysideWashington 4.9
- 398ScaggsvilleMaryland 4.8
- 398HopewellVirginia 4.8
- 398TrentonNew Jersey 4.8
- 398AlbanyNew York 4.8
- 398KenmoreNew York 4.8
- 398Green BayWisconsin 4.8
- 398HighlandUtah 4.8
- 398SpokaneWashington 4.8
- 406FlintMichigan 4.7
- 406BlaineMinnesota 4.7
- 406AppletonWisconsin 4.7
- 406Long BeachCalifornia 4.7
- 406Colorado SpringsColorado 4.7
- 406EugeneOregon 4.7
- 406TigardOregon 4.7
- 413ElktonMaryland 4.6
- 413UticaNew York 4.6
- 413AberdeenSouth Dakota 4.6
- 413BakersfieldCalifornia 4.6
- 413BrawleyCalifornia 4.6
- 413El CentroCalifornia 4.6
- 413San FranciscoCalifornia 4.6
- 413WoodburnOregon 4.6
- 413YakimaWashington 4.6
- 413KahuluiHawaii 4.6
- 413HonoluluHawaii 4.6
- 424BearDelaware 4.5
- 424AltoonaPennsylvania 4.5
- 424EriePennsylvania 4.5
- 424MesaArizona 4.5
- 424Makakilo / Kapolei / Honokai HaleHawaii 4.5
- 429EdgewoodMaryland 4.4
- 429Atlantic CityNew Jersey 4.4
- 429AugustaMaine 4.4
- 429West FargoNorth Dakota 4.4
- 429HollisterCalifornia 4.4
- 429Thousand OaksCalifornia 4.4
- 429BozemanMontana 4.4
- 429Grants PassOregon 4.4
- 429RedmondOregon 4.4
- 429Rapid CitySouth Dakota 4.4
- 429ShorelineWashington 4.4
- 440GlendaleArizona 4.3
- 440San JoseCalifornia 4.3
- 440Las VegasNevada 4.3
- 440LubbockTexas 4.3
- 440BremertonWashington 4.3
- 440VancouverWashington 4.3
- 446MasonOhio 4.2
- 446HolbrookNew York 4.2
- 446TucsonArizona 4.2
- 446LincolnCalifornia 4.2
- 446MaderaCalifornia 4.2
- 446San LeandroCalifornia 4.2
- 446Santa BarbaraCalifornia 4.2
- 446Salmon CreekWashington 4.2
- 446WenatcheeWashington 4.2
- 446Arden-ArcadeCalifornia 4.2
- 456DanburyConnecticut 4.1
- 456New HavenConnecticut 4.1
- 456BrookingsSouth Dakota 4.1
- 456BridgeportConnecticut 4.1
- 456TempeArizona 4.1
- 456Lake ElsinoreCalifornia 4.1
- 456MercedCalifornia 4.1
- 456PuebloColorado 4.1
- 456Las CrucesNew Mexico 4.1
- 456HillsboroOregon 4.1
- 456Spokane ValleyWashington 4.1
- 467BostonMassachusetts 4.0
- 467SpringfieldMassachusetts 4.0
- 467KeeneNew Hampshire 4.0
- 467BayonneNew Jersey 4.0
- 467New CityNew York 4.0
- 467SyracuseNew York 4.0
- 467Sioux FallsSouth Dakota 4.0
- 467Ken CarylColorado 4.0
- 467Rio RanchoNew Mexico 4.0
- 467Carson CityNevada 4.0
- 467PortlandOregon 4.0
- 467CentraliaWashington 4.0
- 467Moses LakeWashington 4.0
- 467AnchorageAlaska 4.0
- 481HagerstownMaryland 3.9
- 481GreenfieldMassachusetts 3.9
- 481NewburghNew York 3.9
- 481White PlainsNew York 3.9
- 481SuperiorWisconsin 3.9
- 481NipomoCalifornia 3.9
- 481SacramentoCalifornia 3.9
- 481Yuba CityCalifornia 3.9
- 481RenoNevada 3.9
- 481BountifulUtah 3.9
- 491WaterburyConnecticut 3.8
- 491DuluthMinnesota 3.8
- 491New BrunswickNew Jersey 3.8
- 491RosevilleCalifornia 3.8
- 491AlbuquerqueNew Mexico 3.8
- 491AlbanyOregon 3.8
- 491AltamontOregon 3.8
- 491Spanish ForkUtah 3.8
- 491GilletteWyoming 3.8
- 491KīheiHawaii 3.8
- 491RandolphNew Jersey 3.8
- 502HartfordConnecticut 3.7
- 502PortlandMaine 3.7
- 502ClovisCalifornia 3.7
- 502SalinasCalifornia 3.7
- 502MagnaUtah 3.7
- 502CasperWyoming 3.7
- 508New LondonConnecticut 3.6
- 508QuincyMassachusetts 3.6
- 508WorcesterMassachusetts 3.6
- 508FillmoreCalifornia 3.6
- 508ParadiseCalifornia 3.6
- 508BoiseIdaho 3.6
- 508PendletonOregon 3.6
- 515BrocktonMassachusetts 3.5
- 515Fall RiverMassachusetts 3.5
- 515PittsfieldMassachusetts 3.5
- 515MantecaCalifornia 3.5
- 515San Luis ObispoCalifornia 3.5
- 515San RafaelCalifornia 3.5
- 515Spring ValleyNevada 3.5
- 515AshlandOregon 3.5
- 515CanbyOregon 3.5
- 515LongviewWashington 3.5
- 515HiloHawaii 3.5
- 526Coeur d'AleneIdaho 3.4
- 526Idaho FallsIdaho 3.4
- 526BendOregon 3.4
- 526HermistonOregon 3.4
- 526CheyenneWyoming 3.4
- 531LowellMassachusetts 3.3
- 531PortsmouthNew Hampshire 3.3
- 531FolsomCalifornia 3.3
- 531OrcuttCalifornia 3.3
- 531WoodlandCalifornia 3.3
- 531Apache JunctionArizona 3.3
- 531MeridianIdaho 3.3
- 531BeavertonOregon 3.3
- 531The DallesOregon 3.3
- 540RockvilleMaryland 3.2
- 540LynnMassachusetts 3.2
- 540North ChicopeeMassachusetts 3.2
- 540BangorMaine 3.2
- 540ProvidenceRhode Island 3.2
- 540LancasterCalifornia 3.2
- 540AberdeenWashington 3.2
- 540LaceyWashington 3.2
- 540Walla WallaWashington 3.2
- 549HerrimanUtah 3.1
- 549EllensburgWashington 3.1
- 549Mount VernonWashington 3.1
- 552PawtucketRhode Island 3.0
- 552Green ValleyArizona 3.0
- 552HendersonNevada 3.0
- 552Coos BayOregon 3.0
- 552Forest GroveOregon 3.0
- 557LewistonMaine 2.9
- 557Grand JunctionColorado 2.9
- 557Boulder CityNevada 2.9
- 557DallasOregon 2.9
- 557TooeleUtah 2.9
- 557Summerlin SouthNevada 2.9
- 563GaltCalifornia 2.8
- 563North OgdenUtah 2.8
- 563Rock SpringsWyoming 2.8
- 566DerryNew Hampshire 2.7
- 566ChicoCalifornia 2.7
- 566EnterpriseNevada 2.7
- 566McMinnvilleOregon 2.7
- 570AtascaderoCalifornia 2.6
- 570LompocCalifornia 2.6
- 570TracyCalifornia 2.6
- 570PocatelloIdaho 2.6
- 570MissoulaMontana 2.6
- 575Spanish SpringsNevada 2.5
- 575Cedar CityUtah 2.5
- 575CorvallisOregon 2.5
- 575Oak HarborWashington 2.5
- 579VacavilleCalifornia 2.4
- 579Twin FallsIdaho 2.4
- 579OrchardsWashington 2.4
- 579LaramieWyoming 2.4
- 583LaconiaNew Hampshire 2.3
- 583MesquiteNevada 2.3
- 583PullmanWashington 2.3
- 586HurricaneUtah 2.2
- 587South LaurelMaryland 2.1
- 587DavisCalifornia 2.1
- 587AnacortesWashington 2.1
- 587Tri-CitiesWashington 2.1
- 591CoventryRhode Island 1.9
- 591BellevueWashington 1.9
- 593MoscowIdaho 1.8
- 594IssaquahWashington 1.3
- 594PascoWashington 1.3
- 596MarysvilleWashington 1.0
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 2024 · United States now
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SmogRank, most polluted cities in United States, PM2.5, March 2024, smogrank.com/us/history/2024-03 (accessed 2 Oct 2026).
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