SmogRank / World / United States / October 2026
Most polluted cities in United States, October 2026
535 cities in United States ranked by their average PM2.5 so far (1 of 31 days). Worst: Calexico at 23.3 µg/m³, #71 of 1,630 cities in the world. Cleanest: Logan at 0.4. A city needs measurements on 70% of the days to be ranked.
← Calexico 23.3 µg/m³
20 µg/m³0
- 1CalexicoCalifornia 77
- 2Jurupa ValleyCalifornia 73
- 3Los AngelesCalifornia 71
- 4HanfordCalifornia 71
- 5Wheatonlow-cost sensorsIllinois 70
- 6FresnoCalifornia 67
- 7Wake Forestlow-cost sensorsNorth Carolina 67
- 7WhittierCalifornia 67
- 9Ann Arborlow-cost sensorsMichigan 66
- 10CorcoranCalifornia 66
- 11FontanaCalifornia 66
- 12San DiegoCalifornia 66
- 13OregonOhio 65
- 13Mission ViejoCalifornia 65
- 15ChattanoogaTennessee 64
- 16Fort WayneIndiana 63
- 16LimaOhio 63
- 18PortsmouthOhio 63
- 19Granite CityIllinois 63
- 19ClovisCalifornia 63
- 19Lake ElsinoreCalifornia 63
- 22DaytonOhio 62
- 22ComptonCalifornia 62
- 24LemayMissouri 62
- 24ToledoOhio 62
- 24Inglewoodlow-cost sensorsCalifornia 62
- 27WestervilleOhio 61
- 28MontgomeryAlabama 61
- 29ClevelandOhio 60
- 30KnoxvilleTennessee 60
- 31Valley StationKentucky 60
- 31PeoriaIllinois 60
- 33BuffaloNew York 60
- 34DecaturIllinois 60
- 34ColumbusOhio 60
- 34West MifflinPennsylvania 60
- 34BurbankCalifornia 60
- 38CincinnatiOhio 59
- 38OceansideCalifornia 59
- 40AugustaGeorgia 59
- 40IndianapolisIndiana 59
- 40Winston-SalemNorth Carolina 59
- 40MuncieIndiana 59
- 40WyomingMichigan 59
- 45Calumet CityIllinois 59
- 46LouisvilleKentucky 59
- 47Long BeachCalifornia 59
- 47Yuba CityCalifornia 59
- 49SpartanburgSouth Carolina 58
- 50GadsdenAlabama 58
- 50Upper AltonIllinois 58
- 50Evergreen Parklow-cost sensorsIllinois 58
- 50Franklin ParkIllinois 58
- 54HuntsvilleAlabama 58
- 54DearbornMichigan 58
- 56BakersfieldCalifornia 58
- 57Torrancelow-cost sensorsCalifornia 58
- 58AthensGeorgia 58
- 58HollandMichigan 58
- 58MercedCalifornia 58
- 61DetroitMichigan 57
- 62BessemerAlabama 57
- 62East Saint LouisIllinois 57
- 62Saint MatthewsKentucky 57
- 62Skokielow-cost sensorsIllinois 57
- 62ModestoCalifornia 57
- 67ElizabethtownKentucky 57
- 67NashvilleTennessee 57
- 67BloomingtonIllinois 57
- 67PerrysburgOhio 57
- 71Nileslow-cost sensorsIllinois 57
- 72SpringfieldOhio 57
- 72Park Ridgelow-cost sensorsIllinois 57
- 74GreenvilleSouth Carolina 56
- 74Evanstonlow-cost sensorsIllinois 56
- 74MaderaCalifornia 56
- 77EvansvilleIndiana 56
- 77White OakOhio 56
- 77Blue Islandlow-cost sensorsIllinois 56
- 80Terre HauteIndiana 56
- 80LebanonOhio 56
- 82MaconGeorgia 56
- 82TemeculaCalifornia 56
- 84ClemmonsNorth Carolina 56
- 84KalamazooMichigan 56
- 84MedinaOhio 56
- 87Camdenlow-cost sensorsNew Jersey 55
- 87Jersey CityNew Jersey 55
- 89JeffersontownKentucky 55
- 89Oak LawnIllinois 55
- 89South BendIndiana 55
- 89Abingtonlow-cost sensorsPennsylvania 55
- 93LafayetteIndiana 55
- 93LancasterPennsylvania 55
- 93DavisCalifornia 55
- 93Tularelow-cost sensorsCalifornia 55
- 97AtlantaGeorgia 55
- 97MantecaCalifornia 55
- 99DecaturAlabama 55
- 99CharlotteNorth Carolina 55
- 99PennsaukenNew Jersey 55
- 99BridgeviewIllinois 55
- 103BaltimoreMaryland 55
- 103Cleveland HeightsOhio 55
- 103BrookfieldIllinois 55
- 103PortageIndiana 55
- 103SouthfieldMichigan 55
- 103Thousand OaksCalifornia 55
- 109ElkhartIndiana 54
- 109KokomoIndiana 54
- 109RedfordMichigan 54
- 112BloomingtonIndiana 54
- 112Columbialow-cost sensorsMissouri 54
- 112TaylorMichigan 54
- 112ElizabethNew Jersey 54
- 112LindenNew Jersey 54
- 112Simi ValleyCalifornia 54
- 118St. LouisMissouri 54
- 118HuntingtonWest Virginia 54
- 118Port HuronMichigan 54
- 118Fort LeeNew Jersey 54
- 118CantonOhio 54
- 118BridgeportConnecticut 54
- 124MorrisvilleNorth Carolina 54
- 124NorthbrookIllinois 54
- 124Lincoln ParkMichigan 54
- 124DublinOhio 54
- 124FillmoreCalifornia 54
- 129ChicagoIllinois 54
- 129YpsilantiMichigan 54
- 129Arden-ArcadeCalifornia 54
- 132MasonOhio 53
- 132BristolVirginia 53
- 132GaryIndiana 53
- 132WarrenOhio 53
- 136OwensboroKentucky 53
- 136Shaker HeightsOhio 53
- 136YoungstownOhio 53
- 136PittsburghPennsylvania 53
- 140DoltonIllinois 53
- 140East ChicagoIndiana 53
- 142NicholasvilleKentucky 53
- 142GahannaOhio 53
- 142Santa Monicalow-cost sensorsCalifornia 53
- 145GreensboroNorth Carolina 53
- 145New HavenConnecticut 53
- 145NapervilleIllinois 53
- 148ArnoldMissouri 52
- 148AshevilleNorth Carolina 52
- 148PainesvilleOhio 52
- 151YorkPennsylvania 52
- 151CharlestonWest Virginia 52
- 151EastpointeMichigan 52
- 151LansingMichigan 52
- 151NewarkNew Jersey 52
- 151SteubenvilleOhio 52
- 157Fort ThomasKentucky 52
- 158Elmwood ParkIllinois 52
- 158RockfordIllinois 52
- 158FlintMichigan 52
- 158Grand RapidsMichigan 52
- 158TrentonNew Jersey 52
- 158ScrantonPennsylvania 52
- 158Prunedalelow-cost sensorsCalifornia 52
- 165GreenvilleNorth Carolina 52
- 166FishersIndiana 52
- 166AshlandKentucky 52
- 166HarrisonburgVirginia 52
- 166San JoseCalifornia 52
- 166MeridianIdaho 52
- 166Columbia CityWashington 52
- 172MaryvilleTennessee 51
- 172ElginIllinois 51
- 172AkronOhio 51
- 172WilkinsburgPennsylvania 51
- 172WeirtonWest Virginia 51
- 172MillcreekUtah 51
- 178PhiladelphiaPennsylvania 51
- 178Upper Saint ClairPennsylvania 51
- 178Pasadenalow-cost sensorsCalifornia 51
- 181WashingtonDistrict of Columbia 51
- 181ColumbusIndiana 51
- 181University CityMissouri 51
- 181CookevilleTennessee 51
- 181East HamptonVirginia 51
- 181JolietIllinois 51
- 181ZionIllinois 51
- 181ParadiseCalifornia 51
- 189Short PumpVirginia 50
- 189HammondIndiana 50
- 189JohnstownPennsylvania 50
- 192BartlettTennessee 49
- 192LebanonPennsylvania 49
- 192South MilwaukeeWisconsin 49
- 195RichmondVirginia 49
- 195WaterburyConnecticut 49
- 195HarrisburgPennsylvania 49
- 198DoverDelaware 48
- 198ScaggsvilleMaryland 48
- 198ChambersburgPennsylvania 48
- 198ClintonIowa 48
- 198ChicoCalifornia 48
- 198TracyCalifornia 48
- 204Warner RobinsGeorgia 48
- 204HickoryNorth Carolina 48
- 204JenisonMichigan 48
- 204New York CityNew York 48
- 204Oconomowoclow-cost sensorsWisconsin 48
- 204MagnaUtah 48
- 210ClarksvilleTennessee 47
- 210AuroraIllinois 47
- 210PatersonNew Jersey 47
- 210Candler-McAfeeGeorgia 47
- 214Des PlainesIllinois 47
- 214RochesterNew York 47
- 214BensalemPennsylvania 47
- 214HermitagePennsylvania 47
- 214Elk Grovelow-cost sensorsCalifornia 47
- 214LewistonIdaho 47
- 220McKeesportPennsylvania 46
- 220Weirton HeightsWest Virginia 46
- 222SpringfieldVirginia 46
- 222HartfordConnecticut 46
- 222ReadingPennsylvania 46
- 222Delanolow-cost sensorsCalifornia 46
- 222VictorvilleCalifornia 46
- 222RenoNevada 46
- 228ChesapeakeVirginia 45
- 228EwingNew Jersey 45
- 228TacomaWashington 45
- 231New BrunswickNew Jersey 44
- 231OxnardCalifornia 44
- 231SacramentoCalifornia 44
- 234Little RockArkansas 44
- 234SeattleWashington 44
- 236Iowa CityIowa 43
- 236AllentownPennsylvania 43
- 236West Valley CityUtah 43
- 239WilmingtonDelaware 43
- 239Brookfieldlow-cost sensorsWisconsin 43
- 239Great FallsMontana 43
- 239GreshamOregon 43
- 243AshburnVirginia 42
- 243AltamontOregon 42
- 245BearDelaware 42
- 245Hunt ValleyMaryland 42
- 245RoanokeVirginia 42
- 245Rose HillVirginia 42
- 245DanburyConnecticut 42
- 245LincolnCalifornia 42
- 245Brigham CityUtah 42
- 252Bay CityMichigan 41
- 252EriePennsylvania 41
- 252ParklandWashington 41
- 255New CityNew York 41
- 255GilroyCalifornia 41
- 255Huntington Beachlow-cost sensorsCalifornia 41
- 255TooeleUtah 41
- 255West JordanUtah 41
- 260HernandoMississippi 40
- 260ConcordCalifornia 40
- 260Florinlow-cost sensorsCalifornia 40
- 260RentonWashington 40
- 264PleasantvilleNew Jersey 39
- 264CaryIllinois 39
- 264NewburghNew York 39
- 264RutlandVermont 39
- 264El CentroCalifornia 39
- 269ColumbusGeorgia 39
- 269Corpus ChristiTexas 39
- 269White PlainsNew York 39
- 269BethlehemPennsylvania 39
- 269CarlislePennsylvania 39
- 269Encinitaslow-cost sensorsCalifornia 39
- 269HighlandUtah 39
- 269OremUtah 39
- 277Atlantic CityNew Jersey 38
- 277South VinelandNew Jersey 38
- 277SalemVirginia 38
- 277MolineIllinois 38
- 277RochesterMinnesota 38
- 277State CollegePennsylvania 38
- 277SunnysideWashington 38
- 284SavannahGeorgia 38
- 284SewellNew Jersey 38
- 284ChesterPennsylvania 38
- 284HerrimanUtah 38
- 288NewarkDelaware 37
- 288McDonoughGeorgia 37
- 288GreenfieldMassachusetts 37
- 291ElktonMaryland 37
- 291Cedar RapidsIowa 37
- 291UticaNew York 37
- 291KentWashington 37
- 291RandolphNew Jersey 37
- 296FolsomCalifornia 36
- 296IndioCalifornia 36
- 296TruckeeCalifornia 36
- 296NampaIdaho 36
- 300BrocktonMassachusetts 36
- 300PittsfieldMassachusetts 36
- 300PortsmouthNew Hampshire 36
- 300NorristownPennsylvania 36
- 300Santa CruzCalifornia 36
- 300UkiahCalifornia 36
- 306EdgewoodMaryland 35
- 306Toms RiverNew Jersey 35
- 306Eau ClaireWisconsin 35
- 306BremertonWashington 35
- 306MarysvilleWashington 35
- 311ValdostaGeorgia 34
- 311SyracuseNew York 34
- 311Redwood CityCalifornia 34
- 314BrawleyCalifornia 34
- 314LaceyWashington 34
- 314Oxon Hill-GlassmanorMaryland 34
- 314Picnic Point-North LynnwoodWashington 34
- 318DavenportIowa 33
- 318LowellMassachusetts 33
- 318HolbrookNew York 33
- 318Salt Lake CityUtah 33
- 322Ponte Vedra BeachFlorida 33
- 322AlbanyGeorgia 33
- 322BlaineMinnesota 33
- 322MinneapolisMinnesota 33
- 322AlbanyNew York 33
- 322WaukeshaWisconsin 33
- 322LancasterCalifornia 33
- 322Los Banoslow-cost sensorsCalifornia 33
- 322Cedar CityUtah 33
- 322ReddingCalifornia 33
- 322Mount VernonWashington 33
- 333Fort LauderdaleFlorida 32
- 333BostonMassachusetts 32
- 333WorcesterMassachusetts 32
- 333PawtucketRhode Island 32
- 333ProvidenceRhode Island 32
- 333Green BayWisconsin 32
- 333Spanish SpringsNevada 32
- 340Live OakTexas 32
- 340LynnMassachusetts 32
- 340AugustaMaine 32
- 340AppletonWisconsin 32
- 340San LeandroCalifornia 32
- 345MilfordMassachusetts 31
- 346Kansas CityKansas 31
- 346South LaurelMaryland 31
- 346MarquetteMichigan 31
- 346Las VegasNevada 31
- 346Coos BayOregon 31
- 351OcalaFlorida 30
- 351New LondonConnecticut 30
- 351AnkenyIowa 30
- 351FraminghamMassachusetts 30
- 351QuincyMassachusetts 30
- 351PocatelloIdaho 30
- 357PhoenixArizona 29
- 357Palo Altolow-cost sensorsCalifornia 29
- 357ThorntonColorado 29
- 360OlatheKansas 29
- 360HaverhillMassachusetts 29
- 360PortlandMaine 29
- 360BurnsvilleMinnesota 29
- 360Goletalow-cost sensorsCalifornia 29
- 360TigardOregon 29
- 360North OgdenUtah 29
- 360Port AngelesWashington 29
- 368Deer ParkTexas 28
- 368Seasidelow-cost sensorsCalifornia 28
- 368PendletonOregon 28
- 368HonoluluHawaii 28
- 372WaterlooIowa 28
- 372Saint PaulMinnesota 28
- 372BountifulUtah 28
- 372CentraliaWashington 28
- 376Apple ValleyMinnesota 27
- 376MankatoMinnesota 27
- 376TucsonArizona 27
- 376DenverColorado 27
- 376HurricaneUtah 27
- 376BoiseIdaho 27
- 376BurienWashington 27
- 383Delray BeachFlorida 27
- 383ShakopeeMinnesota 27
- 383South San Franciscolow-cost sensorsCalifornia 27
- 383Coeur d'AleneIdaho 27
- 383SheridanWyoming 27
- 388MonroeLouisiana 26
- 388HagerstownMaryland 26
- 388DallasTexas 26
- 388MedfordOregon 26
- 392AustinTexas 26
- 392BurlingtonVermont 26
- 392GlendaleArizona 26
- 392AtascaderoCalifornia 26
- 392Twin FallsIdaho 26
- 392AshlandOregon 26
- 392SalemOregon 26
- 392BellevueWashington 26
- 392Spokane ValleyWashington 26
- 401BellevueNebraska 25
- 401SalinasCalifornia 25
- 401PullmanWashington 25
- 404JacksonvilleFlorida 24
- 404NogalesArizona 24
- 404OaklandCalifornia 24
- 404LittletonColorado 24
- 404HermistonOregon 24
- 409Des MoinesIowa 24
- 409Moses LakeWashington 24
- 411ValricoFlorida 23
- 411Kansas CityMissouri 23
- 411BrookingsSouth Dakota 23
- 411El PasoTexas 23
- 411Fort CollinsColorado 23
- 411GreeleyColorado 23
- 411LongmontColorado 23
- 411EugeneOregon 23
- 419GainesvilleFlorida 23
- 419RockvilleMaryland 23
- 419LewistonMaine 23
- 419YumaArizona 23
- 419Arroyo GrandeCalifornia 23
- 419EnterpriseNevada 23
- 419LongviewWashington 23
- 419Salmon CreekWashington 23
- 427Fruit CoveFlorida 22
- 427Lawrencelow-cost sensorsKansas 22
- 427LeawoodKansas 22
- 427HattiesburgMississippi 22
- 427Saint MichaelMinnesota 22
- 427LincolnNebraska 22
- 427Sioux FallsSouth Dakota 22
- 427Casas AdobesArizona 22
- 427TempeArizona 22
- 427Carson CityNevada 22
- 427CanbyOregon 22
- 427AberdeenWashington 22
- 427North Creeklow-cost sensorsWashington 22
- 427KahuluiHawaii 22
- 441BangorMaine 22
- 441Spring ValleyNevada 22
- 441KennewickWashington 22
- 444TopekaKansas 21
- 444WichitaKansas 21
- 444MesaArizona 21
- 444SocorroTexas 21
- 444PortlandOregon 21
- 444Bothelllow-cost sensorsWashington 21
- 444Walla WallaWashington 21
- 451LafayetteLouisiana 21
- 451Saint JosephMissouri 21
- 451Arvadalow-cost sensorsColorado 21
- 451WindsorColorado 21
- 451AlbanyOregon 21
- 456BrunswickGeorgia 20
- 456TulsaOklahoma 20
- 456Newtonlow-cost sensorsMassachusetts 20
- 456OmahaNebraska 20
- 456LaconiaNew Hampshire 20
- 456RidgecrestCalifornia 20
- 456Sunland ParkNew Mexico 20
- 463WellingtonFlorida 19
- 463SuperiorWisconsin 19
- 463Idaho FallsIdaho 19
- 463MilwaukieOregon 19
- 463The DallesOregon 19
- 463Monroelow-cost sensorsWashington 19
- 463CasperWyoming 19
- 470Safety HarborFlorida 19
- 470TampaFlorida 19
- 470Saint CloudMinnesota 19
- 470MadisonWisconsin 19
- 470Cañon CityColorado 19
- 470Grants PassOregon 19
- 470Summerlin SouthNevada 19
- 477MooreOklahoma 18
- 477San RafaelCalifornia 18
- 477MoscowIdaho 18
- 477AnacortesWashington 18
- 477Kirklandlow-cost sensorsWashington 18
- 477PascoWashington 18
- 483East LakeFlorida 18
- 483PascagoulaMississippi 18
- 483HollisterCalifornia 18
- 483BozemanMontana 18
- 483VancouverWashington 18
- 483Four CornersFlorida 18
- 489DerbyKansas 17
- 489EdmondOklahoma 17
- 489Green ValleyArizona 17
- 489MesquiteNevada 17
- 489BeavertonOregon 17
- 489SpokaneWashington 17
- 489BadgerAlaska 17
- 489Inglewood-Finn Hilllow-cost sensorsWashington 17
- 497BartowFlorida 17
- 497Oak RidgeFlorida 17
- 497DuluthMinnesota 17
- 497Oregon CityOregon 17
- 501McAlesterOklahoma 16
- 501HillsboroOregon 16
- 501HiloHawaii 16
- 504LawtonOklahoma 16
- 504Boulder CityNevada 16
- 504EllensburgWashington 16
- 504CheyenneWyoming 16
- 508NipomoCalifornia 15
- 508BendOregon 15
- 510WatertownSouth Dakota 14
- 511OrlandoFlorida 14
- 512LaramieWyoming 13
- 513West FargoNorth Dakota 13
- 513Santa RosaCalifornia 13
- 513Las CrucesNew Mexico 13
- 513McMinnvilleOregon 13
- 517Rio RanchoNew Mexico 12
- 517CorvallisOregon 12
- 517WenatcheeWashington 12
- 520South ValleyNew Mexico 12
- 520YakimaWashington 12
- 522Middletonlow-cost sensorsWisconsin 11
- 522RedmondOregon 11
- 524HobbsNew Mexico 11
- 524DallasOregon 11
- 526Tri-CitiesWashington 10
- 527JacksonMississippi 9
- 527Union Hill-Novelty Hilllow-cost sensorsWashington 9
- 529AberdeenSouth Dakota 8
- 529FairbanksAlaska 8
- 531Lakewoodlow-cost sensorsColorado 7
- 532ConwaySouth Carolina 6
- 533Parkerlow-cost sensorsColorado 4
- 534AltoonaPennsylvania 2
- 534Loganlow-cost sensorsUtah 2
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, October 2026 · United States now
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SmogRank, most polluted cities in United States, PM2.5, October 2026 (so far), smogrank.com/us/history/2026-10 (accessed 2 Oct 2026).
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