SmogRank / Countries / United States / 2025
Most polluted cities in United States, 2025
651 cities in United States ranked by their average PM2.5 over the 365 days; 589 above the WHO annual guideline (5.0 µg/m³). Worst: Calexico at 27.0 µg/m³, #130 of 2,131 cities in the world. Cleanest: Mount Vernon at 2.1. A city needs measurements on 70% of the days to be ranked.
- 1CalexicoCalifornia 27.05.4×
- 2El PasoTexas 15.23.0×
- 3Jurupa ValleyCalifornia 13.82.8×
- 4SocorroTexas 13.12.6×
- 5BakersfieldCalifornia 13.02.6×
- 6Los AngelesCalifornia 12.82.6×
- 7Santa Monicalow-cost sensorsCalifornia 12.62.5×
- 8Hawthornelow-cost sensorsCalifornia 12.52.5×
- 8RiversideCalifornia 12.52.5×
- 8Sunland ParkNew Mexico 12.52.5×
- 11ComptonCalifornia 12.42.5×
- 12HoustonTexas 12.22.4×
- 13FontanaCalifornia 12.12.4×
- 14Pasadenalow-cost sensorsCalifornia 12.02.4×
- 15Columbialow-cost sensorsMissouri 11.72.3×
- 15Oconomowoclow-cost sensorsWisconsin 11.72.3×
- 17RedfordMichigan 11.62.3×
- 17Carsonlow-cost sensorsCalifornia 11.62.3×
- 19NogalesArizona 11.52.3×
- 20Wake Forestlow-cost sensorsNorth Carolina 11.42.3×
- 20VisaliaCalifornia 11.42.3×
- 22HanfordCalifornia 11.32.3×
- 23WyomingMichigan 11.22.2×
- 23BurbankCalifornia 11.22.2×
- 25ConroeTexas 11.02.2×
- 25FresnoCalifornia 11.02.2×
- 25Inglewoodlow-cost sensorsCalifornia 11.02.2×
- 28CorcoranCalifornia 10.92.2×
- 29MaconGeorgia 10.82.2×
- 29AnaheimCalifornia 10.82.2×
- 29Torrancelow-cost sensorsCalifornia 10.82.2×
- 32BaytownTexas 10.62.1×
- 32Franklin ParkIllinois 10.62.1×
- 32GaryIndiana 10.62.1×
- 32San DiegoCalifornia 10.62.1×
- 32BadgerAlaska 10.62.1×
- 37AugustaGeorgia 10.52.1×
- 37Long BeachCalifornia 10.52.1×
- 39MiddletownOhio 10.42.1×
- 39PasadenaTexas 10.42.1×
- 39PortervilleCalifornia 10.42.1×
- 42BirminghamAlabama 10.22.0×
- 42DoltonIllinois 10.22.0×
- 42MankatoMinnesota 10.22.0×
- 42Great FallsMontana 10.22.0×
- 46LexingtonNorth Carolina 10.12.0×
- 46EdinburgTexas 10.12.0×
- 46Elmwood ParkIllinois 10.12.0×
- 46WenatcheeWashington 10.12.0×
- 50LaredoTexas 10.02.0×
- 51IndianapolisIndiana 9.92.0×
- 51MissionTexas 9.92.0×
- 51GlendoraCalifornia 9.92.0×
- 54Little RockArkansas 9.82.0×
- 54TallahasseeFlorida 9.82.0×
- 54ValdostaGeorgia 9.82.0×
- 54WichitaKansas 9.82.0×
- 54East RidgeTennessee 9.82.0×
- 54Corpus ChristiTexas 9.82.0×
- 54OregonOhio 9.82.0×
- 54BrookingsSouth Dakota 9.82.0×
- 62BrownsvilleTexas 9.71.9×
- 62SuperiorWisconsin 9.71.9×
- 64ColumbusOhio 9.61.9×
- 64Mission BendTexas 9.61.9×
- 64ChicagoIllinois 9.61.9×
- 64SteubenvilleOhio 9.61.9×
- 64PhoenixArizona 9.61.9×
- 69SpringdaleArkansas 9.51.9×
- 69Saint JosephMissouri 9.51.9×
- 69MinneapolisMinnesota 9.51.9×
- 69WestervilleOhio 9.51.9×
- 69BerkeleyCalifornia 9.51.9×
- 69Lomitalow-cost sensorsCalifornia 9.51.9×
- 69Santa BarbaraCalifornia 9.51.9×
- 76NorwoodOhio 9.41.9×
- 76Des PlainesIllinois 9.41.9×
- 76HammondIndiana 9.41.9×
- 76MaderaCalifornia 9.41.9×
- 80AlbanyGeorgia 9.31.9×
- 80Terre HauteIndiana 9.31.9×
- 80PortsmouthOhio 9.31.9×
- 80Missouri CityTexas 9.31.9×
- 80San AntonioTexas 9.31.9×
- 80BrookfieldIllinois 9.31.9×
- 80Calumet CityIllinois 9.31.9×
- 80ElginIllinois 9.31.9×
- 80PeoriaIllinois 9.31.9×
- 80DearbornMichigan 9.31.9×
- 80DetroitMichigan 9.31.9×
- 80KalamazooMichigan 9.31.9×
- 92ColumbusGeorgia 9.21.8×
- 92CincinnatiOhio 9.21.8×
- 92ClevelandOhio 9.21.8×
- 92West MifflinPennsylvania 9.21.8×
- 92MilwaukeeWisconsin 9.21.8×
- 92WoodlandCalifornia 9.21.8×
- 92MillcreekUtah 9.21.8×
- 99JacksonMississippi 9.11.8×
- 99Port ArthurTexas 9.11.8×
- 99WaterlooIowa 9.11.8×
- 99JolietIllinois 9.11.8×
- 99NapervilleIllinois 9.11.8×
- 99DuluthMinnesota 9.11.8×
- 99El CajonCalifornia 9.11.8×
- 106Warner RobinsGeorgia 9.01.8×
- 106East Saint LouisIllinois 9.01.8×
- 106Granite CityIllinois 9.01.8×
- 106Baton RougeLouisiana 9.01.8×
- 106TulsaOklahoma 9.01.8×
- 106AustinTexas 9.01.8×
- 106Fort WorthTexas 9.01.8×
- 106TexarkanaTexas 9.01.8×
- 106Fort WayneIndiana 9.01.8×
- 106Michigan CityIndiana 9.01.8×
- 106HollandMichigan 9.01.8×
- 106CantonOhio 9.01.8×
- 106PerrysburgOhio 9.01.8×
- 119McAlesterOklahoma 8.91.8×
- 119YorkPennsylvania 8.91.8×
- 119Des MoinesIowa 8.91.8×
- 119East ChicagoIndiana 8.91.8×
- 119ElkhartIndiana 8.91.8×
- 119PortageIndiana 8.91.8×
- 119BurnsvilleMinnesota 8.91.8×
- 119Saint PaulMinnesota 8.91.8×
- 119WaukeshaWisconsin 8.91.8×
- 119LewistonIdaho 8.91.8×
- 129GainesvilleGeorgia 8.81.8×
- 129Upper AltonIllinois 8.81.8×
- 129GreenvilleSouth Carolina 8.81.8×
- 129Oak LawnIllinois 8.81.8×
- 129Grand RapidsMichigan 8.81.8×
- 129RochesterMinnesota 8.81.8×
- 129ToledoOhio 8.81.8×
- 129WarrenOhio 8.81.8×
- 129Eau ClaireWisconsin 8.81.8×
- 129Agouralow-cost sensorsCalifornia 8.81.8×
- 129Santa ClaritaCalifornia 8.81.8×
- 129HelenaMontana 8.81.8×
- 141LawrencevilleGeorgia 8.71.7×
- 141JeffersonvilleIndiana 8.71.7×
- 141LouisvilleKentucky 8.71.7×
- 141DaytonOhio 8.71.7×
- 141FlorenceSouth Carolina 8.71.7×
- 141RockfordIllinois 8.71.7×
- 141Bay CityMichigan 8.71.7×
- 141ShakopeeMinnesota 8.71.7×
- 141San JoseCalifornia 8.71.7×
- 141StocktonCalifornia 8.71.7×
- 141Eagle PassTexas 8.71.7×
- 152Ponte Vedra BeachFlorida 8.61.7×
- 152Kansas CityKansas 8.61.7×
- 152TopekaKansas 8.61.7×
- 152OwensboroKentucky 8.61.7×
- 152St. LouisMissouri 8.61.7×
- 152HattiesburgMississippi 8.61.7×
- 152Oklahoma CityOklahoma 8.61.7×
- 152North CharlestonSouth Carolina 8.61.7×
- 152SpartanburgSouth Carolina 8.61.7×
- 152ClovisCalifornia 8.61.7×
- 152RichmondCalifornia 8.61.7×
- 152OdessaTexas 8.61.7×
- 164SavannahGeorgia 8.51.7×
- 164Live OakTexas 8.51.7×
- 164ClintonIowa 8.51.7×
- 164AuroraIllinois 8.51.7×
- 164CaryIllinois 8.51.7×
- 164MolineIllinois 8.51.7×
- 164Green BayWisconsin 8.51.7×
- 164VictorvilleCalifornia 8.51.7×
- 164YakimaWashington 8.51.7×
- 173GadsdenAlabama 8.41.7×
- 173EvansvilleIndiana 8.41.7×
- 173La PorteTexas 8.41.7×
- 173Cedar RapidsIowa 8.41.7×
- 173Iowa CityIowa 8.41.7×
- 173LafayetteIndiana 8.41.7×
- 173South BendIndiana 8.41.7×
- 173Lincoln ParkMichigan 8.41.7×
- 173Apple ValleyMinnesota 8.41.7×
- 173LebanonPennsylvania 8.41.7×
- 173OceansideCalifornia 8.41.7×
- 173FairbanksAlaska 8.41.7×
- 173Candler-McAfeeGeorgia 8.41.7×
- 186OcalaFlorida 8.31.7×
- 186VeniceFlorida 8.31.7×
- 186DecaturIllinois 8.31.7×
- 186DerbyKansas 8.31.7×
- 186OlatheKansas 8.31.7×
- 186SpringfieldOhio 8.31.7×
- 186MooreOklahoma 8.31.7×
- 186DentonTexas 8.31.7×
- 186SouthfieldMichigan 8.31.7×
- 186West FargoNorth Dakota 8.31.7×
- 186AppletonWisconsin 8.31.7×
- 186ModestoCalifornia 8.31.7×
- 186PowayCalifornia 8.31.7×
- 186TurlockCalifornia 8.31.7×
- 186MedfordOregon 8.31.7×
- 201MontgomeryAlabama 8.21.6×
- 201Valley StationKentucky 8.21.6×
- 201LafayetteLouisiana 8.21.6×
- 201CharlotteNorth Carolina 8.21.6×
- 201PhiladelphiaPennsylvania 8.21.6×
- 201ChattanoogaTennessee 8.21.6×
- 201SaginawTexas 8.21.6×
- 201DavenportIowa 8.21.6×
- 201MuncieIndiana 8.21.6×
- 201HarrisburgPennsylvania 8.21.6×
- 201LancasterPennsylvania 8.21.6×
- 201MadisonWisconsin 8.21.6×
- 201South MilwaukeeWisconsin 8.21.6×
- 201MidwayFlorida 8.21.6×
- 215AtlantaGeorgia 8.11.6×
- 215FishersIndiana 8.11.6×
- 215NashvilleTennessee 8.11.6×
- 215BeltonTexas 8.11.6×
- 215College StationTexas 8.11.6×
- 215Port HuronMichigan 8.11.6×
- 215AkronOhio 8.11.6×
- 215DublinOhio 8.11.6×
- 215BensalemPennsylvania 8.11.6×
- 215HobbsNew Mexico 8.11.6×
- 225MiamiFlorida 8.01.6×
- 225KennerLouisiana 8.01.6×
- 225BartlettTennessee 8.01.6×
- 225CorsicanaTexas 8.01.6×
- 225MuscatineIowa 8.01.6×
- 225LindenNew Jersey 8.01.6×
- 225AlbanyNew York 8.01.6×
- 225YoungstownOhio 8.01.6×
- 225PittsburghPennsylvania 8.01.6×
- 225La Crescenta-Montroselow-cost sensorsCalifornia 8.01.6×
- 235AthensGeorgia 7.91.6×
- 235HickoryNorth Carolina 7.91.6×
- 235JenksOklahoma 7.91.6×
- 235LansingMichigan 7.91.6×
- 235TaylorMichigan 7.91.6×
- 235BlaineMinnesota 7.91.6×
- 235Saint MichaelMinnesota 7.91.6×
- 235BuffaloNew York 7.91.6×
- 235CarlislePennsylvania 7.91.6×
- 235Casa GrandeArizona 7.91.6×
- 235YumaArizona 7.91.6×
- 235ChicoCalifornia 7.91.6×
- 235MercedCalifornia 7.91.6×
- 248SpringfieldIllinois 7.81.6×
- 248SulphurLouisiana 7.81.6×
- 248HernandoMississippi 7.81.6×
- 248FayettevilleNorth Carolina 7.81.6×
- 248PennsaukenNew Jersey 7.81.6×
- 248SewellNew Jersey 7.81.6×
- 248Ponca CityOklahoma 7.81.6×
- 248Saint AndrewsSouth Carolina 7.81.6×
- 248KnoxvilleTennessee 7.81.6×
- 248San MarcosTexas 7.81.6×
- 248HuntingtonWest Virginia 7.81.6×
- 248BloomingtonIllinois 7.81.6×
- 248ChampaignIllinois 7.81.6×
- 248JenisonMichigan 7.81.6×
- 248Saint CloudMinnesota 7.81.6×
- 248New York CityNew York 7.81.6×
- 248Lake ElsinoreCalifornia 7.81.6×
- 248OaklandCalifornia 7.81.6×
- 266HueytownAlabama 7.71.5×
- 266BrunswickGeorgia 7.71.5×
- 266JasperIndiana 7.71.5×
- 266New AlbanyIndiana 7.71.5×
- 266JeffersontownKentucky 7.71.5×
- 266BaltimoreMaryland 7.71.5×
- 266AnkenyIowa 7.71.5×
- 266EastpointeMichigan 7.71.5×
- 266YpsilantiMichigan 7.71.5×
- 266ElizabethNew Jersey 7.71.5×
- 266EwingNew Jersey 7.71.5×
- 266WatertownSouth Dakota 7.71.5×
- 266IndioCalifornia 7.71.5×
- 266BismarckNorth Dakota 7.71.5×
- 266West JordanUtah 7.71.5×
- 281HuntsvilleAlabama 7.61.5×
- 281PrichardAlabama 7.61.5×
- 281TrussvilleAlabama 7.61.5×
- 281WilmingtonDelaware 7.61.5×
- 281Bonita SpringsFlorida 7.61.5×
- 281Ferry PassFlorida 7.61.5×
- 281GulfportMississippi 7.61.5×
- 281PascagoulaMississippi 7.61.5×
- 281ClemmonsNorth Carolina 7.61.5×
- 281GalvestonTexas 7.61.5×
- 281ZionIllinois 7.61.5×
- 281AndersonIndiana 7.61.5×
- 281WilkinsburgPennsylvania 7.61.5×
- 281BrawleyCalifornia 7.61.5×
- 281RosevilleCalifornia 7.61.5×
- 281Simi ValleyCalifornia 7.61.5×
- 281UkiahCalifornia 7.61.5×
- 281Las VegasNevada 7.61.5×
- 281SunnysideWashington 7.61.5×
- 300JacksonvilleFlorida 7.51.5×
- 300ValricoFlorida 7.51.5×
- 300Saint MatthewsKentucky 7.51.5×
- 300ArnoldMissouri 7.51.5×
- 300ClaytonNorth Carolina 7.51.5×
- 300RaleighNorth Carolina 7.51.5×
- 300Winston-SalemNorth Carolina 7.51.5×
- 300JacksonTennessee 7.51.5×
- 300LimaOhio 7.51.5×
- 300Shaker HeightsOhio 7.51.5×
- 300MantecaCalifornia 7.51.5×
- 300BozemanMontana 7.51.5×
- 300Grants PassOregon 7.51.5×
- 300Arden-ArcadeCalifornia 7.51.5×
- 314Fort LauderdaleFlorida 7.41.5×
- 314BloomingtonIndiana 7.41.5×
- 314Kansas CityMissouri 7.41.5×
- 314DurhamNorth Carolina 7.41.5×
- 314MorrisvilleNorth Carolina 7.41.5×
- 314NorthbrookIllinois 7.41.5×
- 314ReadingPennsylvania 7.41.5×
- 314ScrantonPennsylvania 7.41.5×
- 314NipomoCalifornia 7.41.5×
- 314OxnardCalifornia 7.41.5×
- 314ThorntonColorado 7.41.5×
- 314AltamontOregon 7.41.5×
- 314OremUtah 7.41.5×
- 327BessemerAlabama 7.31.5×
- 327PaducahKentucky 7.31.5×
- 327WashingtonDistrict of Columbia 7.31.5×
- 327Oak RidgeFlorida 7.31.5×
- 327Hunt ValleyMaryland 7.31.5×
- 327University CityMissouri 7.31.5×
- 327EdmondOklahoma 7.31.5×
- 327ChesterPennsylvania 7.31.5×
- 327HendersonvilleTennessee 7.31.5×
- 327HartfordConnecticut 7.31.5×
- 327PortlandMaine 7.31.5×
- 327McKeesportPennsylvania 7.31.5×
- 327TucsonArizona 7.31.5×
- 327SpokaneWashington 7.31.5×
- 341HomesteadFlorida 7.21.4×
- 341TampaFlorida 7.21.4×
- 341ColumbusIndiana 7.21.4×
- 341AshlandKentucky 7.21.4×
- 341LemayMissouri 7.21.4×
- 341South VinelandNew Jersey 7.21.4×
- 341LebanonOhio 7.21.4×
- 341DanburyConnecticut 7.21.4×
- 341NorristownPennsylvania 7.21.4×
- 341WeirtonWest Virginia 7.21.4×
- 341GlendaleArizona 7.21.4×
- 341West Valley CityUtah 7.21.4×
- 353St. PetersburgFlorida 7.11.4×
- 353LeawoodKansas 7.11.4×
- 353Lexington-FayetteKentucky 7.11.4×
- 353ChalmetteLouisiana 7.11.4×
- 353EdgewoodMaryland 7.11.4×
- 353GreensboroNorth Carolina 7.11.4×
- 353White OakOhio 7.11.4×
- 353Cleveland HeightsOhio 7.11.4×
- 353New HavenConnecticut 7.11.4×
- 353Jersey CityNew Jersey 7.11.4×
- 353PatersonNew Jersey 7.11.4×
- 353GahannaOhio 7.11.4×
- 353MedinaOhio 7.11.4×
- 353MesaArizona 7.11.4×
- 353TempeArizona 7.11.4×
- 353LincolnCalifornia 7.11.4×
- 353VallejoCalifornia 7.11.4×
- 353Coeur d'AleneIdaho 7.11.4×
- 353Spokane ValleyWashington 7.11.4×
- 372DecaturAlabama 7.01.4×
- 372FairhopeAlabama 7.01.4×
- 372DoverDelaware 7.01.4×
- 372Daytona BeachFlorida 7.01.4×
- 372Palm CityFlorida 7.01.4×
- 372New OrleansLouisiana 7.01.4×
- 372EssexMaryland 7.01.4×
- 372Roanoke RapidsNorth Carolina 7.01.4×
- 372ChesapeakeVirginia 7.01.4×
- 372SpringfieldVirginia 7.01.4×
- 372CharlestonWest Virginia 7.01.4×
- 372Fort LeeNew Jersey 7.01.4×
- 372RochesterNew York 7.01.4×
- 372Yuba CityCalifornia 7.01.4×
- 372RenoNevada 7.01.4×
- 372NampaIdaho 7.01.4×
- 372AnacortesWashington 7.01.4×
- 372Columbia CityWashington 7.01.4×
- 390SpringfieldMissouri 6.91.4×
- 390LawtonOklahoma 6.91.4×
- 390DyersburgTennessee 6.91.4×
- 390KokomoIndiana 6.91.4×
- 390MarquetteMichigan 6.91.4×
- 390BellevueNebraska 6.91.4×
- 390OmahaNebraska 6.91.4×
- 390PainesvilleOhio 6.91.4×
- 390AltoonaPennsylvania 6.91.4×
- 390BethlehemPennsylvania 6.91.4×
- 390EriePennsylvania 6.91.4×
- 390BanningCalifornia 6.91.4×
- 390MartinezCalifornia 6.91.4×
- 390San FranciscoCalifornia 6.91.4×
- 390LongmontColorado 6.91.4×
- 390MoscowIdaho 6.91.4×
- 406NewarkDelaware 6.81.4×
- 406Fruit CoveFlorida 6.81.4×
- 406ElizabethtownKentucky 6.81.4×
- 406Toms RiverNew Jersey 6.81.4×
- 406AshburnVirginia 6.81.4×
- 406HarrisonburgVirginia 6.81.4×
- 406GreenfieldMassachusetts 6.81.4×
- 406SpringfieldMassachusetts 6.81.4×
- 406TrentonNew Jersey 6.81.4×
- 406HermitagePennsylvania 6.81.4×
- 406GaltCalifornia 6.81.4×
- 406Las CrucesNew Mexico 6.81.4×
- 406ReddingCalifornia 6.81.4×
- 406GreeleyColorado 6.81.4×
- 406Salt Lake CityUtah 6.81.4×
- 406Spanish ForkUtah 6.81.4×
- 422McDonoughGeorgia 6.71.3×
- 422ScaggsvilleMaryland 6.71.3×
- 422ClarksvilleTennessee 6.71.3×
- 422ColumbiaTennessee 6.71.3×
- 422CharlottesvilleVirginia 6.71.3×
- 422RichmondVirginia 6.71.3×
- 422WaterburyConnecticut 6.71.3×
- 422AllentownPennsylvania 6.71.3×
- 422JohnstownPennsylvania 6.71.3×
- 422State CollegePennsylvania 6.71.3×
- 422PawtucketRhode Island 6.71.3×
- 422Arroyo GrandeCalifornia 6.71.3×
- 422FolsomCalifornia 6.71.3×
- 422SacramentoCalifornia 6.71.3×
- 422South San Franciscolow-cost sensorsCalifornia 6.71.3×
- 422Thousand OaksCalifornia 6.71.3×
- 422Arvadalow-cost sensorsColorado 6.71.3×
- 422AlbuquerqueNew Mexico 6.71.3×
- 440Fort SmithArkansas 6.61.3×
- 440Belle GladeFlorida 6.61.3×
- 440Deerfield BeachFlorida 6.61.3×
- 440Fort MyersFlorida 6.61.3×
- 440West PensacolaFlorida 6.61.3×
- 440AshevilleNorth Carolina 6.61.3×
- 440MaryvilleTennessee 6.61.3×
- 440La VistaNebraska 6.61.3×
- 440HolbrookNew York 6.61.3×
- 440HermistonOregon 6.61.3×
- 440Four CornersFlorida 6.61.3×
- 451Fort ThomasKentucky 6.51.3×
- 451NicholasvilleKentucky 6.51.3×
- 451LibertyMissouri 6.51.3×
- 451RaymoreMissouri 6.51.3×
- 451BostonMassachusetts 6.51.3×
- 451KeeneNew Hampshire 6.51.3×
- 451UticaNew York 6.51.3×
- 451ProvidenceRhode Island 6.51.3×
- 451RutlandVermont 6.51.3×
- 451MaranaArizona 6.51.3×
- 451San LeandroCalifornia 6.51.3×
- 451Rio RanchoNew Mexico 6.51.3×
- 451Fort CollinsColorado 6.51.3×
- 451BountifulUtah 6.51.3×
- 465BearDelaware 6.41.3×
- 465DavieFlorida 6.41.3×
- 465Delray BeachFlorida 6.41.3×
- 465GainesvilleFlorida 6.41.3×
- 465ShreveportLouisiana 6.41.3×
- 465ElktonMaryland 6.41.3×
- 465BridgeportConnecticut 6.41.3×
- 465El CentroCalifornia 6.41.3×
- 465DenverColorado 6.41.3×
- 465ButteMontana 6.41.3×
- 465AuburnWashington 6.41.3×
- 465Moses LakeWashington 6.41.3×
- 465TacomaWashington 6.41.3×
- 465Oxon Hill-GlassmanorMaryland 6.41.3×
- 479Lake MaryFlorida 6.31.3×
- 479OrlandoFlorida 6.31.3×
- 479SarasotaFlorida 6.31.3×
- 479HagerstownMaryland 6.31.3×
- 479GreenvilleNorth Carolina 6.31.3×
- 479MasonOhio 6.31.3×
- 479KingsportTennessee 6.31.3×
- 479Rose HillVirginia 6.31.3×
- 479New BrunswickNew Jersey 6.31.3×
- 479AberdeenSouth Dakota 6.31.3×
- 479Sioux FallsSouth Dakota 6.31.3×
- 479Weirton HeightsWest Virginia 6.31.3×
- 491WellingtonFlorida 6.21.2×
- 491Atlantic CityNew Jersey 6.21.2×
- 491East HamptonVirginia 6.21.2×
- 491RoanokeVirginia 6.21.2×
- 491FraminghamMassachusetts 6.21.2×
- 491Grand IslandNebraska 6.21.2×
- 491BayonneNew Jersey 6.21.2×
- 491SyracuseNew York 6.21.2×
- 491BillingsMontana 6.21.2×
- 491Rapid CitySouth Dakota 6.21.2×
- 491RentonWashington 6.21.2×
- 491SeattleWashington 6.21.2×
- 503Safety HarborFlorida 6.11.2×
- 503PittsfieldMassachusetts 6.11.2×
- 503LompocCalifornia 6.11.2×
- 503Palo Altolow-cost sensorsCalifornia 6.11.2×
- 503Cedar CityUtah 6.11.2×
- 503MagnaUtah 6.11.2×
- 503EllensburgWashington 6.11.2×
- 503Port AngelesWashington 6.11.2×
- 503Picnic Point-North LynnwoodWashington 6.11.2×
- 512HaverhillMassachusetts 6.01.2×
- 512LincolnNebraska 6.01.2×
- 512NewburghNew York 6.01.2×
- 512Casas AdobesArizona 6.01.2×
- 512DavisCalifornia 6.01.2×
- 512TemeculaCalifornia 6.01.2×
- 512TracyCalifornia 6.01.2×
- 512HighlandUtah 6.01.2×
- 512RandolphNew Jersey 6.01.2×
- 521East LakeFlorida 5.91.2×
- 521RockvilleMaryland 5.91.2×
- 521CookevilleTennessee 5.91.2×
- 521BrocktonMassachusetts 5.91.2×
- 521LowellMassachusetts 5.91.2×
- 521WorcesterMassachusetts 5.91.2×
- 521GilroyCalifornia 5.91.2×
- 521LivermoreCalifornia 5.91.2×
- 521SalinasCalifornia 5.91.2×
- 530Winter ParkFlorida 5.81.2×
- 530New LondonConnecticut 5.81.2×
- 530Lexingtonlow-cost sensorsMassachusetts 5.81.2×
- 530North ChicopeeMassachusetts 5.81.2×
- 530AugustaMaine 5.81.2×
- 530San Luis ObispoCalifornia 5.81.2×
- 530Lakewoodlow-cost sensorsColorado 5.81.2×
- 530LubbockTexas 5.81.2×
- 530EugeneOregon 5.81.2×
- 530TigardOregon 5.81.2×
- 530North OgdenUtah 5.81.2×
- 541WestonFlorida 5.71.1×
- 541PleasantvilleNew Jersey 5.71.1×
- 541White PlainsNew York 5.71.1×
- 541FillmoreCalifornia 5.71.1×
- 541PleasantonCalifornia 5.71.1×
- 541VacavilleCalifornia 5.71.1×
- 541Grand JunctionColorado 5.71.1×
- 541PendletonOregon 5.71.1×
- 541HerrimanUtah 5.71.1×
- 541ParklandWashington 5.71.1×
- 541AnchorageAlaska 5.71.1×
- 552Coconut CreekFlorida 5.61.1×
- 552HopewellVirginia 5.61.1×
- 552MilfordMassachusetts 5.61.1×
- 552New CityNew York 5.61.1×
- 552Spanish SpringsNevada 5.61.1×
- 552WindsorColorado 5.61.1×
- 552Brigham CityUtah 5.61.1×
- 552Walla WallaWashington 5.61.1×
- 560Fall RiverMassachusetts 5.51.1×
- 560LynnMassachusetts 5.51.1×
- 560QuincyMassachusetts 5.51.1×
- 560BangorMaine 5.51.1×
- 560LewistonMaine 5.51.1×
- 560PortsmouthNew Hampshire 5.51.1×
- 560Redwood CityCalifornia 5.51.1×
- 560The DallesOregon 5.51.1×
- 568South LaurelMaryland 5.41.1×
- 568Goletalow-cost sensorsCalifornia 5.41.1×
- 568Dodge CityKansas 5.41.1×
- 568PocatelloIdaho 5.41.1×
- 568Twin FallsIdaho 5.41.1×
- 568AshlandOregon 5.41.1×
- 568BendOregon 5.41.1×
- 568SalemOregon 5.41.1×
- 576Santa CruzCalifornia 5.31.1×
- 576BoulderColorado 5.31.1×
- 576BoiseIdaho 5.31.1×
- 576AlbanyOregon 5.31.1×
- 576HillsboroOregon 5.31.1×
- 576TooeleUtah 5.31.1×
- 576ShorelineWashington 5.31.1×
- 583DerryNew Hampshire 5.21.0×
- 583PuebloColorado 5.21.0×
- 583Apache JunctionArizona 5.21.0×
- 583SheridanWyoming 5.21.0×
- 587Spring ValleyNevada 5.11.0×
- 587BellinghamWashington 5.11.0×
- 587LaceyWashington 5.11.0×
- 590Palm BayFlorida 5.01.0×
- 590LancasterCalifornia 5.01.0×
- 590EnterpriseNevada 5.01.0×
- 590Idaho FallsIdaho 5.01.0×
- 590PortlandOregon 5.01.0×
- 595ParadiseCalifornia 4.91.0×
- 595LittletonColorado 4.91.0×
- 595Carson CityNevada 4.91.0×
- 595HendersonNevada 4.91.0×
- 595HurricaneUtah 4.91.0×
- 595MissoulaMontana 4.91.0×
- 595MilwaukieOregon 4.91.0×
- 595RoseburgOregon 4.91.0×
- 595LongviewWashington 4.91.0×
- 595VancouverWashington 4.91.0×
- 605San RafaelCalifornia 4.81.0×
- 605GreshamOregon 4.81.0×
- 605PullmanWashington 4.81.0×
- 605Summerlin SouthNevada 4.81.0×
- 609Colorado SpringsColorado 4.70.9×
- 609CanbyOregon 4.70.9×
- 609RedmondOregon 4.70.9×
- 609WoodburnOregon 4.70.9×
- 613AtascaderoCalifornia 4.60.9×
- 613ConcordCalifornia 4.60.9×
- 613HollisterCalifornia 4.60.9×
- 613Ken CarylColorado 4.60.9×
- 613BremertonWashington 4.60.9×
- 613CentraliaWashington 4.60.9×
- 613Tri-CitiesWashington 4.60.9×
- 620LaconiaNew Hampshire 4.50.9×
- 620BeavertonOregon 4.50.9×
- 622TruckeeCalifornia 4.40.9×
- 622Cañon CityColorado 4.40.9×
- 622Salmon CreekWashington 4.40.9×
- 625Santa RosaCalifornia 4.30.9×
- 625GilletteWyoming 4.30.9×
- 625Rock SpringsWyoming 4.30.9×
- 628HonoluluHawaii 4.20.8×
- 628Inglewood-Finn Hilllow-cost sensorsWashington 4.20.8×
- 630OrcuttCalifornia 4.10.8×
- 630KahuluiHawaii 4.10.8×
- 632Green ValleyArizona 3.90.8×
- 632Coos BayOregon 3.90.8×
- 632McMinnvilleOregon 3.90.8×
- 632AberdeenWashington 3.90.8×
- 632KīheiHawaii 3.90.8×
- 637RidgecrestCalifornia 3.80.8×
- 638Boulder CityNevada 3.70.7×
- 638MesquiteNevada 3.70.7×
- 638DallasOregon 3.70.7×
- 638Makakilo / Kapolei / Honokai HaleHawaii 3.70.7×
- 642CoventryRhode Island 3.60.7×
- 642CasperWyoming 3.60.7×
- 644BellevueWashington 3.50.7×
- 644HiloHawaii 3.50.7×
- 646CorvallisOregon 3.20.6×
- 646CheyenneWyoming 3.20.6×
- 646LaramieWyoming 3.20.6×
- 649Forest GroveOregon 3.10.6×
- 650Oak HarborWashington 2.90.6×
- 651Mount VernonWashington 2.10.4×
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+