SmogRank / World / United States / April 2026
Most polluted cities in United States, April 2026
665 cities in United States ranked by their average PM2.5 over the 30 days. Worst: Calexico at 18.9 µg/m³, #422 of 2,573 cities in the world. Cleanest: Encinitas at 1.4. A city needs measurements on 70% of the days to be ranked.
← Calexico 18.9
- 1CalexicoCalifornia 69
- 2LaredoTexas 63
- 3MaconGeorgia 63
- 4El PasoTexas 61
- 5ValdostaGeorgia 59
- 5Eagle PassTexas 59
- 7Corpus ChristiTexas 58
- 7Port ArthurTexas 58
- 9MissionTexas 57
- 10LibertyMissouri 57
- 11AugustaGeorgia 57
- 11Jurupa ValleyCalifornia 57
- 13AustinTexas 56
- 14SavannahGeorgia 56
- 15BrunswickGeorgia 56
- 15San AntonioTexas 56
- 17EdinburgTexas 55
- 18BaytownTexas 55
- 19Deer ParkTexas 55
- 20Wake Forestlow-cost sensorsNorth Carolina 55
- 21Warner RobinsGeorgia 54
- 22ColumbusGeorgia 54
- 22BrownsvilleTexas 54
- 22Live OakTexas 54
- 22BrookfieldIllinois 54
- 26Redmondlow-cost sensorsWashington 54
- 27Candler-McAfeeGeorgia 54
- 28West MemphisArkansas 53
- 29PortsmouthOhio 53
- 30DallasTexas 53
- 31ChattanoogaTennessee 53
- 31RiversideCalifornia 53
- 33Little RockArkansas 52
- 33TopekaKansas 52
- 33WichitaKansas 52
- 33SpartanburgSouth Carolina 52
- 33HoustonTexas 52
- 38ShreveportLouisiana 52
- 38FayettevilleNorth Carolina 52
- 38FlorenceSouth Carolina 52
- 38San MarcosTexas 52
- 42AthensGeorgia 52
- 42College StationTexas 52
- 42Fort WorthTexas 52
- 45AlbanyGeorgia 52
- 45PhiladelphiaPennsylvania 52
- 47BirminghamAlabama 51
- 47GadsdenAlabama 51
- 47AshlandKentucky 51
- 50MiddletownOhio 51
- 50CorsicanaTexas 51
- 50PasadenaTexas 51
- 50Sunland ParkNew Mexico 51
- 54BeltonTexas 50
- 54DentonTexas 50
- 56TallahasseeFlorida 49
- 56AtlantaGeorgia 49
- 56DerbyKansas 49
- 56HattiesburgMississippi 49
- 56Saint AndrewsSouth Carolina 49
- 56Cedar ParkTexas 49
- 56TaylorTexas 49
- 56TexarkanaTexas 49
- 56WaterlooIowa 49
- 65SpringdaleArkansas 49
- 65JacksonMississippi 49
- 67ConroeTexas 48
- 67SaginawTexas 48
- 69Ponte Vedra BeachFlorida 48
- 69LouisvilleKentucky 48
- 69MorrisvilleNorth Carolina 48
- 69PflugervilleTexas 48
- 69WyomingMichigan 48
- 69SocorroTexas 48
- 75TulsaOklahoma 47
- 75North CharlestonSouth Carolina 47
- 77HuntsvilleAlabama 47
- 77LawrencevilleGeorgia 47
- 77JeffersonvilleIndiana 47
- 77CharlotteNorth Carolina 47
- 77NorwoodOhio 47
- 77GreenvilleSouth Carolina 47
- 77East RidgeTennessee 47
- 77GalvestonTexas 47
- 77CharlottesvilleVirginia 47
- 86JacksonvilleFlorida 46
- 86Valley StationKentucky 46
- 86LexingtonNorth Carolina 46
- 86Oklahoma CityOklahoma 46
- 86HendersonvilleTennessee 46
- 86KnoxvilleTennessee 46
- 86BrookingsSouth Dakota 46
- 93MontgomeryAlabama 46
- 93MooreOklahoma 46
- 93YorkPennsylvania 46
- 93MaryvilleTennessee 46
- 93ComptonCalifornia 46
- 93FontanaCalifornia 46
- 99OcalaFlorida 45
- 99OwensboroKentucky 45
- 99RaleighNorth Carolina 45
- 99Missouri CityTexas 45
- 99TucsonArizona 45
- 99WhittierCalifornia 45
- 99Great FallsMontana 45
- 99MidwayFlorida 45
- 107ColumbiaTennessee 44
- 107WestervilleOhio 44
- 109Kendale LakesFlorida 44
- 109Baton RougeLouisiana 44
- 109ClaytonNorth Carolina 44
- 109Winston-SalemNorth Carolina 44
- 109CharlestonWest Virginia 44
- 114DecaturAlabama 43
- 114Granite CityIllinois 43
- 114EvansvilleIndiana 43
- 114New AlbanyIndiana 43
- 114SulphurLouisiana 43
- 114BartlettTennessee 43
- 114La PorteTexas 43
- 121TrussvilleAlabama 43
- 121MonroeLouisiana 43
- 121BaltimoreMaryland 43
- 121Mission BendTexas 43
- 121MankatoMinnesota 43
- 126BessemerAlabama 42
- 126PrichardAlabama 42
- 126Ponca CityOklahoma 42
- 126PeoriaIllinois 42
- 126ToledoOhio 42
- 126BakersfieldCalifornia 42
- 126VisaliaCalifornia 42
- 133VeniceFlorida 42
- 133IndianapolisIndiana 42
- 133Saint JosephMissouri 42
- 133GreenvilleNorth Carolina 42
- 133MasonOhio 42
- 133JacksonTennessee 42
- 133MuscatineIowa 42
- 133DoltonIllinois 42
- 133HammondIndiana 42
- 133LancasterPennsylvania 42
- 133LebanonPennsylvania 42
- 133AnaheimCalifornia 42
- 133Los AngelesCalifornia 42
- 146ChesapeakeVirginia 41
- 146HarrisonburgVirginia 41
- 146HuntingtonWest Virginia 41
- 146Calumet CityIllinois 41
- 146ClevelandOhio 41
- 146SteubenvilleOhio 41
- 152McDonoughGeorgia 41
- 152HernandoMississippi 41
- 152ClemmonsNorth Carolina 41
- 152CincinnatiOhio 41
- 152ColumbusOhio 41
- 152SpringfieldOhio 41
- 152Fort WayneIndiana 41
- 152PerrysburgOhio 41
- 152West MifflinPennsylvania 41
- 152Long BeachCalifornia 41
- 162Ferry PassFlorida 40
- 162MiamiFlorida 40
- 162GreensboroNorth Carolina 40
- 162HickoryNorth Carolina 40
- 162EdmondOklahoma 40
- 162JenksOklahoma 40
- 162BridgeviewIllinois 40
- 162RedfordMichigan 40
- 162OregonOhio 40
- 171Bonita SpringsFlorida 39
- 171Fort LauderdaleFlorida 39
- 171Fruit CoveFlorida 39
- 171Palm CityFlorida 39
- 171GainesvilleGeorgia 39
- 171JeffersontownKentucky 39
- 171Saint MatthewsKentucky 39
- 171New OrleansLouisiana 39
- 171DaytonOhio 39
- 171Franklin ParkIllinois 39
- 171BensalemPennsylvania 39
- 182GainesvilleFlorida 39
- 182TampaFlorida 39
- 182ValricoFlorida 39
- 182AshevilleNorth Carolina 39
- 182LawtonOklahoma 39
- 182DyersburgTennessee 39
- 182FlintMichigan 39
- 182NipomoCalifornia 39
- 182San DiegoCalifornia 39
- 182HobbsNew Mexico 39
- 192Belle GladeFlorida 38
- 192West PensacolaFlorida 38
- 192GulfportMississippi 38
- 192Roanoke RapidsNorth Carolina 38
- 192CookevilleTennessee 38
- 192Evanstonlow-cost sensorsIllinois 38
- 192PhoenixArizona 38
- 192Picnic Point-North LynnwoodWashington 38
- 200St. PetersburgFlorida 38
- 200BloomingtonIndiana 38
- 200ElizabethtownKentucky 38
- 200EssexMaryland 38
- 200PascagoulaMississippi 38
- 200Toms RiverNew Jersey 38
- 200LebanonOhio 38
- 200McAlesterOklahoma 38
- 200Fort DodgeIowa 38
- 200EwingNew Jersey 38
- 200Chula VistaCalifornia 38
- 200Lake ElsinoreCalifornia 38
- 200MercedCalifornia 38
- 200OdessaTexas 38
- 214WashingtonDistrict of Columbia 37
- 214Oak RidgeFlorida 37
- 214Pompano BeachFlorida 37
- 214NicholasvilleKentucky 37
- 214ClarksvilleTennessee 37
- 214ReadingPennsylvania 37
- 214WatertownSouth Dakota 37
- 221HomesteadFlorida 37
- 221JasperIndiana 37
- 221PennsaukenNew Jersey 37
- 221East HamptonVirginia 37
- 221HopewellVirginia 37
- 221ClintonIowa 37
- 221Des PlainesIllinois 37
- 221HarrisburgPennsylvania 37
- 221Casas AdobesArizona 37
- 221NogalesArizona 37
- 221IndioCalifornia 37
- 221PortervilleCalifornia 37
- 233PaducahKentucky 36
- 233Fort MyersFlorida 36
- 233OlatheKansas 36
- 233Lexington-FayetteKentucky 36
- 233ChalmetteLouisiana 36
- 233KennerLouisiana 36
- 233SpringfieldMissouri 36
- 233DurhamNorth Carolina 36
- 233ConwaySouth Carolina 36
- 233RichmondVirginia 36
- 233Elmwood ParkIllinois 36
- 233AndersonIndiana 36
- 233East ChicagoIndiana 36
- 233ElkhartIndiana 36
- 233LafayetteIndiana 36
- 233Royal Oaklow-cost sensorsMichigan 36
- 233New York CityNew York 36
- 233OaklandCalifornia 36
- 251Fort SmithArkansas 36
- 251East Saint LouisIllinois 36
- 251Upper AltonIllinois 36
- 251LafayetteLouisiana 36
- 251Atlantic CityNew Jersey 36
- 251RoanokeVirginia 36
- 251Short PumpVirginia 36
- 251JolietIllinois 36
- 251MuncieIndiana 36
- 251South BendIndiana 36
- 251CarlislePennsylvania 36
- 251Arroyo GrandeCalifornia 36
- 251CorcoranCalifornia 36
- 251Mission ViejoCalifornia 36
- 265WilmingtonDelaware 35
- 265Daytona BeachFlorida 35
- 265Safety HarborFlorida 35
- 265Columbialow-cost sensorsMissouri 35
- 265St. LouisMissouri 35
- 265SalemVirginia 35
- 265ChicagoIllinois 35
- 265ElizabethNew Jersey 35
- 265CantonOhio 35
- 265DublinOhio 35
- 265WarrenOhio 35
- 265VictorvilleCalifornia 35
- 265Columbia CityWashington 35
- 278SarasotaFlorida 34
- 278SpringfieldVirginia 34
- 278Oak LawnIllinois 34
- 278PortageIndiana 34
- 278DearbornMichigan 34
- 278DetroitMichigan 34
- 278HolbrookNew York 34
- 278Casa GrandeArizona 34
- 278PowayCalifornia 34
- 278San FranciscoCalifornia 34
- 278Santa BarbaraCalifornia 34
- 278Apache JunctionArizona 34
- 278SeattleWashington 34
- 278Four CornersFlorida 34
- 292Deerfield BeachFlorida 34
- 292Delray BeachFlorida 34
- 292OrlandoFlorida 34
- 292DecaturIllinois 34
- 292Kansas CityKansas 34
- 292South VinelandNew Jersey 34
- 292KingsportTennessee 34
- 292Cleveland HeightsOhio 34
- 292New HavenConnecticut 34
- 292AuroraIllinois 34
- 292ChampaignIllinois 34
- 292NapervilleIllinois 34
- 292Michigan CityIndiana 34
- 292Lincoln ParkMichigan 34
- 292Jersey CityNew Jersey 34
- 292BuffaloNew York 34
- 292PittsburghPennsylvania 34
- 292YumaArizona 34
- 292BrawleyCalifornia 34
- 292San Luis ObispoCalifornia 34
- 292LewistonIdaho 34
- 313Hunt ValleyMaryland 33
- 313AshburnVirginia 33
- 313AnkenyIowa 33
- 313ElginIllinois 33
- 313Fort LeeNew Jersey 33
- 313WilkinsburgPennsylvania 33
- 313Oconomowoclow-cost sensorsWisconsin 33
- 313BridgeportConnecticut 33
- 313TempeArizona 33
- 313Delanolow-cost sensorsCalifornia 33
- 313El CajonCalifornia 33
- 313OceansideCalifornia 33
- 313South Lake TahoeCalifornia 33
- 313UkiahCalifornia 33
- 327Fort ThomasKentucky 33
- 327White OakOhio 33
- 327Rose HillVirginia 33
- 327RockfordIllinois 33
- 327BrocktonMassachusetts 33
- 327KalamazooMichigan 33
- 327LindenNew Jersey 33
- 327PatersonNew Jersey 33
- 327WeirtonWest Virginia 33
- 327BurbankCalifornia 33
- 327TacomaWashington 33
- 338East LakeFlorida 32
- 338WellingtonFlorida 32
- 338Des MoinesIowa 32
- 338AkronOhio 32
- 338MedinaOhio 32
- 338YoungstownOhio 32
- 338NorristownPennsylvania 32
- 338El CentroCalifornia 32
- 338FresnoCalifornia 32
- 338SalinasCalifornia 32
- 338Santa ClaritaCalifornia 32
- 338WoodlandCalifornia 32
- 338BendOregon 32
- 351DavieFlorida 32
- 351ArnoldMissouri 32
- 351University CityMissouri 32
- 351ChesterPennsylvania 32
- 351DavenportIowa 32
- 351MolineIllinois 32
- 351Bay CityMichigan 32
- 351PainesvilleOhio 32
- 351Shaker HeightsOhio 32
- 351ClovisCalifornia 32
- 351Santa CruzCalifornia 32
- 351NampaIdaho 32
- 363Palm BayFlorida 31
- 363PleasantvilleNew Jersey 31
- 363SewellNew Jersey 31
- 363Iowa CityIowa 31
- 363FraminghamMassachusetts 31
- 363Grand RapidsMichigan 31
- 363MinneapolisMinnesota 31
- 363McKeesportPennsylvania 31
- 363MesaArizona 31
- 363San JoseCalifornia 31
- 363Simi ValleyCalifornia 31
- 363StocktonCalifornia 31
- 363ThorntonColorado 31
- 363RandolphNew Jersey 31
- 377BearDelaware 31
- 377SpringfieldIllinois 31
- 377ScaggsvilleMaryland 31
- 377RaymoreMissouri 31
- 377New LondonConnecticut 31
- 377BloomingtonIllinois 31
- 377PortlandMaine 31
- 377BurnsvilleMinnesota 31
- 377RochesterMinnesota 31
- 377JohnstownPennsylvania 31
- 377State CollegePennsylvania 31
- 377MilwaukeeWisconsin 31
- 377MillcreekUtah 31
- 377BellinghamWashington 31
- 377Arden-ArcadeCalifornia 31
- 392Lake MaryFlorida 30
- 392Cedar RapidsIowa 30
- 392GaryIndiana 30
- 392JenisonMichigan 30
- 392AllentownPennsylvania 30
- 392ScrantonPennsylvania 30
- 392SuperiorWisconsin 30
- 392PaysonArizona 30
- 392DavisCalifornia 30
- 392San LeandroCalifornia 30
- 392Coeur d'AleneIdaho 30
- 392RentonWashington 30
- 404BostonMassachusetts 29
- 404Fall RiverMassachusetts 29
- 404LynnMassachusetts 29
- 404SouthfieldMichigan 29
- 404EriePennsylvania 29
- 404Upper Saint ClairPennsylvania 29
- 404BanningCalifornia 29
- 404TemeculaCalifornia 29
- 404BozemanMontana 29
- 413FairhopeAlabama 29
- 413Coconut CreekFlorida 29
- 413LeawoodKansas 29
- 413ElktonMaryland 29
- 413EastpointeMichigan 29
- 413YpsilantiMichigan 29
- 413ShakopeeMinnesota 29
- 413LincolnNebraska 29
- 413BethlehemPennsylvania 29
- 413WaukeshaWisconsin 29
- 413AtascaderoCalifornia 29
- 413GlendoraCalifornia 29
- 413LaceyWashington 29
- 413VancouverWashington 29
- 427EdgewoodMaryland 28
- 427LemayMissouri 28
- 427HaverhillMassachusetts 28
- 427TaylorMichigan 28
- 427Apple ValleyMinnesota 28
- 427Saint PaulMinnesota 28
- 427HermitagePennsylvania 28
- 427Weirton HeightsWest Virginia 28
- 427Santa RosaCalifornia 28
- 427Fort CollinsColorado 28
- 427OremUtah 28
- 427YakimaWashington 28
- 439NewarkDelaware 28
- 439Kansas CityMissouri 28
- 439HartfordConnecticut 28
- 439TrentonNew Jersey 28
- 439MadisonWisconsin 28
- 439FillmoreCalifornia 28
- 439GlendaleArizona 28
- 439MaranaArizona 28
- 439HanfordCalifornia 28
- 439DenverColorado 28
- 439GreeleyColorado 28
- 439LongmontColorado 28
- 439West JordanUtah 28
- 439AuburnWashington 28
- 453DanburyConnecticut 27
- 453CaryIllinois 27
- 453QuincyMassachusetts 27
- 453SpringfieldMassachusetts 27
- 453Port HuronMichigan 27
- 453BayonneNew Jersey 27
- 453AltoonaPennsylvania 27
- 453RutlandVermont 27
- 453South MilwaukeeWisconsin 27
- 453LivermoreCalifornia 27
- 453Santa Monicalow-cost sensorsCalifornia 27
- 453Las CrucesNew Mexico 27
- 453Grants PassOregon 27
- 453Oxon Hill-GlassmanorMaryland 27
- 467WaterburyConnecticut 27
- 467LansingMichigan 27
- 467TurlockCalifornia 27
- 467RenoNevada 27
- 467AmarilloTexas 27
- 467LubbockTexas 27
- 467HighlandUtah 27
- 474RockvilleMaryland 26
- 474South LaurelMaryland 26
- 474LowellMassachusetts 26
- 474WorcesterMassachusetts 26
- 474BlaineMinnesota 26
- 474ProvidenceRhode Island 26
- 474Dodge CityKansas 26
- 474SunnysideWashington 26
- 474WenatcheeWashington 26
- 474FairbanksAlaska 26
- 484NorthbrookIllinois 26
- 484ZionIllinois 26
- 484DuluthMinnesota 26
- 484New BrunswickNew Jersey 26
- 484AppletonWisconsin 26
- 484BerkeleyCalifornia 26
- 484LancasterCalifornia 26
- 484ReddingCalifornia 26
- 484TigardOregon 26
- 484West Valley CityUtah 26
- 484SpokaneWashington 26
- 495PortsmouthNew Hampshire 25
- 495RochesterNew York 25
- 495Eau ClaireWisconsin 25
- 495MaderaCalifornia 25
- 495MantecaCalifornia 25
- 495RosevilleCalifornia 25
- 501Saint CloudMinnesota 24
- 501Saint MichaelMinnesota 24
- 501OmahaNebraska 24
- 501NewburghNew York 24
- 501GahannaOhio 24
- 501SacramentoCalifornia 24
- 501Tularelow-cost sensorsCalifornia 24
- 501Colorado SpringsColorado 24
- 501Spanish SpringsNevada 24
- 501HillsboroOregon 24
- 501SalemOregon 24
- 501EllensburgWashington 24
- 501ShorelineWashington 24
- 501Spokane ValleyWashington 24
- 501Tri-CitiesWashington 24
- 516GilroyCalifornia 24
- 516OxnardCalifornia 24
- 516Thousand OaksCalifornia 24
- 516ButteMontana 24
- 516Coos BayOregon 24
- 516Salt Lake CityUtah 24
- 516Spanish ForkUtah 24
- 516BremertonWashington 24
- 516BurienWashington 24
- 516BadgerAlaska 24
- 526MilfordMassachusetts 23
- 526West FargoNorth Dakota 23
- 526Green BayWisconsin 23
- 526GaltCalifornia 23
- 526HollisterCalifornia 23
- 526PleasantonCalifornia 23
- 526San RafaelCalifornia 23
- 526Arvadalow-cost sensorsColorado 23
- 526MoscowIdaho 23
- 526AltamontOregon 23
- 536GreenfieldMassachusetts 23
- 536AlbanyNew York 23
- 536Ken CarylColorado 23
- 536Rio RanchoNew Mexico 23
- 536Cedar CityUtah 23
- 536Moses LakeWashington 23
- 542HueytownAlabama 22
- 542Lexingtonlow-cost sensorsMassachusetts 22
- 542LewistonMaine 22
- 542HollandMichigan 22
- 542BellevueNebraska 22
- 542La VistaNebraska 22
- 542DerryNew Hampshire 22
- 542KeeneNew Hampshire 22
- 542SyracuseNew York 22
- 542PawtucketRhode Island 22
- 542RidgecrestCalifornia 22
- 542PuebloColorado 22
- 542AlbuquerqueNew Mexico 22
- 542WindsorColorado 22
- 542KīheiHawaii 22
- 542HonoluluHawaii 22
- 558HagerstownMaryland 22
- 558North ChicopeeMassachusetts 22
- 558PittsfieldMassachusetts 22
- 558AugustaMaine 22
- 558Grand IslandNebraska 22
- 558ConcordCalifornia 22
- 558ParadiseCalifornia 22
- 558TracyCalifornia 22
- 558Las VegasNevada 22
- 558BoulderColorado 22
- 558Twin FallsIdaho 22
- 558CanbyOregon 22
- 558GreshamOregon 22
- 558MedfordOregon 22
- 558HiloHawaii 22
- 573BangorMaine 21
- 573Redwood CityCalifornia 21
- 573Yuba CityCalifornia 21
- 573HurricaneUtah 21
- 573HelenaMontana 21
- 578UticaNew York 21
- 578VallejoCalifornia 21
- 578AlbanyOregon 21
- 578EugeneOregon 21
- 578PortlandOregon 21
- 578The DallesOregon 21
- 578CentraliaWashington 21
- 585White PlainsNew York 20
- 585ModestoCalifornia 20
- 585OrcuttCalifornia 20
- 585Idaho FallsIdaho 20
- 585BountifulUtah 20
- 585Brigham CityUtah 20
- 585MagnaUtah 20
- 585Salmon CreekWashington 20
- 593Sioux FallsSouth Dakota 19
- 593Torrancelow-cost sensorsCalifornia 19
- 593Boulder CityNevada 19
- 593BillingsMontana 19
- 593Oregon CityOregon 19
- 593TooeleUtah 19
- 593AberdeenWashington 19
- 593AnchorageAlaska 19
- 601Green ValleyArizona 19
- 601LincolnCalifornia 19
- 601Carson CityNevada 19
- 601North OgdenUtah 19
- 601KahuluiHawaii 19
- 606LimaOhio 18
- 606AberdeenSouth Dakota 18
- 606ChicoCalifornia 18
- 606MilwaukieOregon 18
- 606RoseburgOregon 18
- 606WoodburnOregon 18
- 606Oak HarborWashington 18
- 613New CityNew York 18
- 613Los Banoslow-cost sensorsCalifornia 18
- 613EnterpriseNevada 18
- 613AshlandOregon 18
- 613BeavertonOregon 18
- 613PendletonOregon 18
- 613HerrimanUtah 18
- 613KentWashington 18
- 613LongviewWashington 18
- 622CoventryRhode Island 17
- 622TruckeeCalifornia 17
- 622Cañon CityColorado 17
- 622HendersonNevada 17
- 622Spring ValleyNevada 17
- 622MissoulaMontana 17
- 622RedmondOregon 17
- 629MarquetteMichigan 17
- 629Brookfieldlow-cost sensorsWisconsin 17
- 629FolsomCalifornia 17
- 629PocatelloIdaho 17
- 629GilletteWyoming 17
- 629SheridanWyoming 17
- 635BoiseIdaho 16
- 635Summerlin SouthNevada 16
- 637LompocCalifornia 16
- 637VacavilleCalifornia 16
- 637Grand JunctionColorado 16
- 637Walla WallaWashington 16
- 637Rock SpringsWyoming 16
- 642Newtonlow-cost sensorsMassachusetts 15
- 642LaconiaNew Hampshire 15
- 642Pasadenalow-cost sensorsCalifornia 15
- 642CorvallisOregon 15
- 646DallasOregon 14
- 647Middletonlow-cost sensorsWisconsin 14
- 647MesquiteNevada 14
- 647Forest GroveOregon 14
- 647CasperWyoming 14
- 651Huntington Beachlow-cost sensorsCalifornia 13
- 651Kirklandlow-cost sensorsWashington 13
- 651PullmanWashington 13
- 654BellevueWashington 13
- 654Mount VernonWashington 13
- 654CheyenneWyoming 13
- 654LaramieWyoming 13
- 658AnacortesWashington 12
- 659MartinezCalifornia 12
- 660Union Hill-Novelty Hilllow-cost sensorsWashington 11
- 661Palo Altolow-cost sensorsCalifornia 10
- 661McMinnvilleOregon 10
- 661Bothelllow-cost sensorsWashington 10
- 664Goletalow-cost sensorsCalifornia 8
- 665Encinitaslow-cost sensorsCalifornia 8
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, April 2026 · United States now
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SmogRank, most polluted cities in United States, PM2.5, April 2026, smogrank.com/us/history/2026-04 (accessed 2 Oct 2026).
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