SmogRank / Countries / United States / 2024
Most polluted cities in United States, 2024
611 cities in United States ranked by their average PM2.5 over the 366 days; 549 above the WHO annual guideline (5.0 µg/m³). Worst: Mission at 14.6 µg/m³, #140 of 1,686 cities in the world. Cleanest: Marysville at 1.5. A city needs measurements on 70% of the days to be ranked.
- 1MissionTexas 14.62.9×
- 2Jurupa ValleyCalifornia 14.32.9×
- 3FontanaCalifornia 14.02.8×
- 4Los AngelesCalifornia 13.52.7×
- 5BirminghamAlabama 13.32.7×
- 6BadgerAlaska 12.92.6×
- 7RiversideCalifornia 12.72.5×
- 8VisaliaCalifornia 12.62.5×
- 9HoustonTexas 12.52.5×
- 10ConroeTexas 12.32.5×
- 10BakersfieldCalifornia 12.32.5×
- 10BurbankCalifornia 12.32.5×
- 10FresnoCalifornia 12.32.5×
- 14EdinburgTexas 12.22.4×
- 15ComptonCalifornia 12.12.4×
- 16HanfordCalifornia 12.02.4×
- 17BartlettTennessee 11.72.3×
- 18Hawthornelow-cost sensorsCalifornia 11.52.3×
- 19Columbialow-cost sensorsMissouri 11.42.3×
- 19PortervilleCalifornia 11.42.3×
- 21Carsonlow-cost sensorsCalifornia 11.32.3×
- 22RedfordMichigan 11.22.2×
- 22AnaheimCalifornia 11.22.2×
- 24Corpus ChristiTexas 11.12.2×
- 25Little RockArkansas 11.02.2×
- 25BrownsvilleTexas 11.02.2×
- 25Missouri CityTexas 11.02.2×
- 28NogalesArizona 10.92.2×
- 28HelenaMontana 10.92.2×
- 30ClovisCalifornia 10.82.2×
- 30El PasoTexas 10.82.2×
- 32DallasTexas 10.72.1×
- 33ShreveportLouisiana 10.62.1×
- 33BaytownTexas 10.62.1×
- 33Live OakTexas 10.62.1×
- 33PasadenaTexas 10.62.1×
- 33Port ArthurTexas 10.62.1×
- 33Inglewoodlow-cost sensorsCalifornia 10.62.1×
- 33Santa ClaritaCalifornia 10.62.1×
- 40LawrencevilleGeorgia 10.52.1×
- 40East RidgeTennessee 10.52.1×
- 40LaredoTexas 10.52.1×
- 43GlendoraCalifornia 10.42.1×
- 44AugustaGeorgia 10.32.1×
- 44GainesvilleGeorgia 10.32.1×
- 44Torrancelow-cost sensorsCalifornia 10.32.1×
- 47San AntonioTexas 10.22.0×
- 47RichmondCalifornia 10.22.0×
- 47Great FallsMontana 10.22.0×
- 50ColumbusGeorgia 10.12.0×
- 50CorcoranCalifornia 10.12.0×
- 52AustinTexas 10.02.0×
- 52SaginawTexas 10.02.0×
- 52Chula VistaCalifornia 10.02.0×
- 55La Crescenta-Montroselow-cost sensorsCalifornia 9.92.0×
- 56HueytownAlabama 9.82.0×
- 56DurhamNorth Carolina 9.82.0×
- 56CalexicoCalifornia 9.82.0×
- 56NampaIdaho 9.82.0×
- 60LafayetteLouisiana 9.71.9×
- 60StocktonCalifornia 9.71.9×
- 60MeridianIdaho 9.71.9×
- 60MillcreekUtah 9.71.9×
- 64AlbanyGeorgia 9.61.9×
- 64ColumbusOhio 9.61.9×
- 64SpartanburgSouth Carolina 9.61.9×
- 64Mission BendTexas 9.61.9×
- 64OregonOhio 9.61.9×
- 64PhoenixArizona 9.61.9×
- 64IndioCalifornia 9.61.9×
- 71SpringdaleArkansas 9.51.9×
- 71IndianapolisIndiana 9.51.9×
- 71TexarkanaTexas 9.51.9×
- 71San DiegoCalifornia 9.51.9×
- 71Santa Monicalow-cost sensorsCalifornia 9.51.9×
- 71TurlockCalifornia 9.51.9×
- 77West MemphisArkansas 9.41.9×
- 77OcalaFlorida 9.41.9×
- 77KennesawGeorgia 9.41.9×
- 77MaconGeorgia 9.41.9×
- 77Baton RougeLouisiana 9.41.9×
- 77DearbornMichigan 9.41.9×
- 77WyomingMichigan 9.41.9×
- 77BensalemPennsylvania 9.41.9×
- 77Long BeachCalifornia 9.41.9×
- 86ValdostaGeorgia 9.31.9×
- 86ToledoOhio 9.31.9×
- 86BoiseIdaho 9.31.9×
- 86FairbanksAlaska 9.31.9×
- 90TrussvilleAlabama 9.21.8×
- 90Oklahoma CityOklahoma 9.21.8×
- 90Fort WorthTexas 9.21.8×
- 90Agouralow-cost sensorsCalifornia 9.21.8×
- 90El CajonCalifornia 9.21.8×
- 90Lomitalow-cost sensorsCalifornia 9.21.8×
- 90MaderaCalifornia 9.21.8×
- 90Eagle PassTexas 9.21.8×
- 90LewistonIdaho 9.21.8×
- 99Phenix CityAlabama 9.11.8×
- 99SulphurLouisiana 9.11.8×
- 99St. LouisMissouri 9.11.8×
- 99HattiesburgMississippi 9.11.8×
- 99Ponca CityOklahoma 9.11.8×
- 104GadsdenAlabama 9.01.8×
- 104MooreOklahoma 9.01.8×
- 104Lake ElsinoreCalifornia 9.01.8×
- 104VictorvilleCalifornia 9.01.8×
- 104Candler-McAfeeGeorgia 9.01.8×
- 109Terre HauteIndiana 8.91.8×
- 109Kansas CityKansas 8.91.8×
- 109HernandoMississippi 8.91.8×
- 109MiddletownOhio 8.91.8×
- 109McAlesterOklahoma 8.91.8×
- 109GreenvilleSouth Carolina 8.91.8×
- 109ClevelandOhio 8.91.8×
- 116Fort LauderdaleFlorida 8.81.8×
- 116East Saint LouisIllinois 8.81.8×
- 116Granite CityIllinois 8.81.8×
- 116West MifflinPennsylvania 8.81.8×
- 120TallahasseeFlorida 8.71.7×
- 120AtlantaGeorgia 8.71.7×
- 120TulsaOklahoma 8.71.7×
- 120FlorenceSouth Carolina 8.71.7×
- 120Saint AndrewsSouth Carolina 8.71.7×
- 120CorsicanaTexas 8.71.7×
- 120ButteMontana 8.71.7×
- 120SheridanWyoming 8.71.7×
- 128East LakeFlorida 8.61.7×
- 128JacksonMississippi 8.61.7×
- 128PhiladelphiaPennsylvania 8.61.7×
- 128ChattanoogaTennessee 8.61.7×
- 128Casa GrandeArizona 8.61.7×
- 128ModestoCalifornia 8.61.7×
- 128San JoseCalifornia 8.61.7×
- 128MidwayFlorida 8.61.7×
- 136MiamiFlorida 8.51.7×
- 136Warner RobinsGeorgia 8.51.7×
- 136NorwoodOhio 8.51.7×
- 136BrookfieldIllinois 8.51.7×
- 136GaryIndiana 8.51.7×
- 136DetroitMichigan 8.51.7×
- 136CantonOhio 8.51.7×
- 136WestervilleOhio 8.51.7×
- 144JeffersonvilleIndiana 8.41.7×
- 144Saint JosephMissouri 8.41.7×
- 144JenksOklahoma 8.41.7×
- 144College StationTexas 8.41.7×
- 144San MarcosTexas 8.41.7×
- 144KalamazooMichigan 8.41.7×
- 144HarrisburgPennsylvania 8.41.7×
- 151Ponte Vedra BeachFlorida 8.31.7×
- 151EvansvilleIndiana 8.31.7×
- 151HickoryNorth Carolina 8.31.7×
- 151LexingtonNorth Carolina 8.31.7×
- 151EdmondOklahoma 8.31.7×
- 151KnoxvilleTennessee 8.31.7×
- 151Fort WayneIndiana 8.31.7×
- 151HollandMichigan 8.31.7×
- 151DublinOhio 8.31.7×
- 151MantecaCalifornia 8.31.7×
- 151BendOregon 8.31.7×
- 162PrichardAlabama 8.21.6×
- 162DerbyKansas 8.21.6×
- 162CharlotteNorth Carolina 8.21.6×
- 162CincinnatiOhio 8.21.6×
- 162TaylorTexas 8.21.6×
- 162Franklin ParkIllinois 8.21.6×
- 162NapervilleIllinois 8.21.6×
- 162ElkhartIndiana 8.21.6×
- 162RochesterMinnesota 8.21.6×
- 162BrawleyCalifornia 8.21.6×
- 162OremUtah 8.21.6×
- 162West JordanUtah 8.21.6×
- 174VeniceFlorida 8.11.6×
- 174SavannahGeorgia 8.11.6×
- 174TopekaKansas 8.11.6×
- 174FayettevilleNorth Carolina 8.11.6×
- 174GreensboroNorth Carolina 8.11.6×
- 174NashvilleTennessee 8.11.6×
- 174DentonTexas 8.11.6×
- 174Oak LawnIllinois 8.11.6×
- 174UkiahCalifornia 8.11.6×
- 183ChalmetteLouisiana 8.01.6×
- 183PascagoulaMississippi 8.01.6×
- 183MorrisvilleNorth Carolina 8.01.6×
- 183Winston-SalemNorth Carolina 8.01.6×
- 183HendersonvilleTennessee 8.01.6×
- 183BeltonTexas 8.01.6×
- 183La PorteTexas 8.01.6×
- 183WaterlooIowa 8.01.6×
- 183ChicagoIllinois 8.01.6×
- 183East ChicagoIndiana 8.01.6×
- 183Grand RapidsMichigan 8.01.6×
- 183EwingNew Jersey 8.01.6×
- 183PerrysburgOhio 8.01.6×
- 183LebanonPennsylvania 8.01.6×
- 183BanningCalifornia 8.01.6×
- 183El CentroCalifornia 8.01.6×
- 183WoodlandCalifornia 8.01.6×
- 183Arden-ArcadeCalifornia 8.01.6×
- 201Bonita SpringsFlorida 7.91.6×
- 201ValricoFlorida 7.91.6×
- 201AthensGeorgia 7.91.6×
- 201LouisvilleKentucky 7.91.6×
- 201Valley StationKentucky 7.91.6×
- 201KennerLouisiana 7.91.6×
- 201GulfportMississippi 7.91.6×
- 201Lincoln ParkMichigan 7.91.6×
- 201BurnsvilleMinnesota 7.91.6×
- 201SteubenvilleOhio 7.91.6×
- 201WarrenOhio 7.91.6×
- 201LancasterPennsylvania 7.91.6×
- 201YumaArizona 7.91.6×
- 201OceansideCalifornia 7.91.6×
- 201Las VegasNevada 7.91.6×
- 216Lake MaryFlorida 7.81.6×
- 216RaleighNorth Carolina 7.81.6×
- 216DaytonOhio 7.81.6×
- 216SpringfieldOhio 7.81.6×
- 216Calumet CityIllinois 7.81.6×
- 216JolietIllinois 7.81.6×
- 216ShakopeeMinnesota 7.81.6×
- 216WatertownSouth Dakota 7.81.6×
- 216MercedCalifornia 7.81.6×
- 216PowayCalifornia 7.81.6×
- 216MedfordOregon 7.81.6×
- 216Salt Lake CityUtah 7.81.6×
- 216West Valley CityUtah 7.81.6×
- 229JasperIndiana 7.71.5×
- 229OlatheKansas 7.71.5×
- 229PortsmouthOhio 7.71.5×
- 229HammondIndiana 7.71.5×
- 229BellevueNebraska 7.71.5×
- 229ElizabethNew Jersey 7.71.5×
- 229AltamontOregon 7.71.5×
- 236HuntsvilleAlabama 7.61.5×
- 236Fort SmithArkansas 7.61.5×
- 236DecaturIllinois 7.61.5×
- 236ClemmonsNorth Carolina 7.61.5×
- 236CaryIllinois 7.61.5×
- 236MuncieIndiana 7.61.5×
- 236MilwaukeeWisconsin 7.61.5×
- 243DecaturAlabama 7.51.5×
- 243TampaFlorida 7.51.5×
- 243ClaytonNorth Carolina 7.51.5×
- 243North CharlestonSouth Carolina 7.51.5×
- 243ClintonIowa 7.51.5×
- 243Bay CityMichigan 7.51.5×
- 243MinneapolisMinnesota 7.51.5×
- 243Saint PaulMinnesota 7.51.5×
- 243WheelingWest Virginia 7.51.5×
- 243GlendaleArizona 7.51.5×
- 243SacramentoCalifornia 7.51.5×
- 243Santa BarbaraCalifornia 7.51.5×
- 243Simi ValleyCalifornia 7.51.5×
- 243Yuba CityCalifornia 7.51.5×
- 243LongmontColorado 7.51.5×
- 243Twin FallsIdaho 7.51.5×
- 243BismarckNorth Dakota 7.51.5×
- 243RedmondOregon 7.51.5×
- 243Rapid CitySouth Dakota 7.51.5×
- 262Belle GladeFlorida 7.41.5×
- 262Ferry PassFlorida 7.41.5×
- 262BrunswickGeorgia 7.41.5×
- 262ScaggsvilleMaryland 7.41.5×
- 262PennsaukenNew Jersey 7.41.5×
- 262YorkPennsylvania 7.41.5×
- 262GalvestonTexas 7.41.5×
- 262Iowa CityIowa 7.41.5×
- 262LafayetteIndiana 7.41.5×
- 262PortageIndiana 7.41.5×
- 262South BendIndiana 7.41.5×
- 262EastpointeMichigan 7.41.5×
- 262LindenNew Jersey 7.41.5×
- 262New York CityNew York 7.41.5×
- 262CarlislePennsylvania 7.41.5×
- 262OdessaTexas 7.41.5×
- 278MontgomeryAlabama 7.31.5×
- 278NewarkDelaware 7.31.5×
- 278FishersIndiana 7.31.5×
- 278JeffersontownKentucky 7.31.5×
- 278Hunt ValleyMaryland 7.31.5×
- 278White OakOhio 7.31.5×
- 278AshburnVirginia 7.31.5×
- 278HuntingtonWest Virginia 7.31.5×
- 278AnkenyIowa 7.31.5×
- 278NorthbrookIllinois 7.31.5×
- 278PeoriaIllinois 7.31.5×
- 278RockfordIllinois 7.31.5×
- 278Michigan CityIndiana 7.31.5×
- 278AkronOhio 7.31.5×
- 278PittsburghPennsylvania 7.31.5×
- 278HollisterCalifornia 7.31.5×
- 278BozemanMontana 7.31.5×
- 278YakimaWashington 7.31.5×
- 296JacksonvilleFlorida 7.21.4×
- 296McDonoughGeorgia 7.21.4×
- 296ChesterPennsylvania 7.21.4×
- 296Des PlainesIllinois 7.21.4×
- 296TaylorMichigan 7.21.4×
- 296OaklandCalifornia 7.21.4×
- 296ThorntonColorado 7.21.4×
- 296Columbia CityWashington 7.21.4×
- 304Coconut CreekFlorida 7.11.4×
- 304HomesteadFlorida 7.11.4×
- 304Upper AltonIllinois 7.11.4×
- 304Saint MatthewsKentucky 7.11.4×
- 304MaryvilleTennessee 7.11.4×
- 304DavenportIowa 7.11.4×
- 304FlintMichigan 7.11.4×
- 304MedinaOhio 7.11.4×
- 304YoungstownOhio 7.11.4×
- 304ReadingPennsylvania 7.11.4×
- 304WaukeshaWisconsin 7.11.4×
- 304MesaArizona 7.11.4×
- 304TempeArizona 7.11.4×
- 304ChicoCalifornia 7.11.4×
- 304AlbuquerqueNew Mexico 7.11.4×
- 304BillingsMontana 7.11.4×
- 304RentonWashington 7.11.4×
- 321FairhopeAlabama 7.01.4×
- 321SpringfieldIllinois 7.01.4×
- 321New OrleansLouisiana 7.01.4×
- 321University CityMissouri 7.01.4×
- 321AdaOklahoma 7.01.4×
- 321ConwaySouth Carolina 7.01.4×
- 321HarrisonburgVirginia 7.01.4×
- 321CharlestonWest Virginia 7.01.4×
- 321Port HuronMichigan 7.01.4×
- 321McKeesportPennsylvania 7.01.4×
- 321NorristownPennsylvania 7.01.4×
- 321SunnysideWashington 7.01.4×
- 333PaducahKentucky 6.91.4×
- 333WashingtonDistrict of Columbia 6.91.4×
- 333Daytona BeachFlorida 6.91.4×
- 333New AlbanyIndiana 6.91.4×
- 333Kansas CityMissouri 6.91.4×
- 333LemayMissouri 6.91.4×
- 333Roanoke RapidsNorth Carolina 6.91.4×
- 333ChesapeakeVirginia 6.91.4×
- 333ChampaignIllinois 6.91.4×
- 333KokomoIndiana 6.91.4×
- 333Fort LeeNew Jersey 6.91.4×
- 333ScrantonPennsylvania 6.91.4×
- 333WilkinsburgPennsylvania 6.91.4×
- 333MaranaArizona 6.91.4×
- 333GreeleyColorado 6.91.4×
- 348WilmingtonDelaware 6.81.4×
- 348Deerfield BeachFlorida 6.81.4×
- 348SarasotaFlorida 6.81.4×
- 348Winter ParkFlorida 6.81.4×
- 348ColumbusIndiana 6.81.4×
- 348AshlandKentucky 6.81.4×
- 348BaltimoreMaryland 6.81.4×
- 348ArnoldMissouri 6.81.4×
- 348Toms RiverNew Jersey 6.81.4×
- 348ColumbiaTennessee 6.81.4×
- 348SpringfieldVirginia 6.81.4×
- 348AndersonIndiana 6.81.4×
- 348JenisonMichigan 6.81.4×
- 348YpsilantiMichigan 6.81.4×
- 348Saint MichaelMinnesota 6.81.4×
- 348OmahaNebraska 6.81.4×
- 348PatersonNew Jersey 6.81.4×
- 348TrentonNew Jersey 6.81.4×
- 348KenmoreNew York 6.81.4×
- 348BethlehemPennsylvania 6.81.4×
- 348South MilwaukeeWisconsin 6.81.4×
- 348WeirtonWest Virginia 6.81.4×
- 348RosevilleCalifornia 6.81.4×
- 371Delray BeachFlorida 6.71.3×
- 371LawtonOklahoma 6.71.3×
- 371JacksonTennessee 6.71.3×
- 371CharlottesvilleVirginia 6.71.3×
- 371East HamptonVirginia 6.71.3×
- 371RichmondVirginia 6.71.3×
- 371DanburyConnecticut 6.71.3×
- 371Lexingtonlow-cost sensorsMassachusetts 6.71.3×
- 371LansingMichigan 6.71.3×
- 371Apple ValleyMinnesota 6.71.3×
- 371BlaineMinnesota 6.71.3×
- 371Saint CloudMinnesota 6.71.3×
- 371Jersey CityNew Jersey 6.71.3×
- 371AlbanyNew York 6.71.3×
- 371HobbsNew Mexico 6.71.3×
- 371Rio RanchoNew Mexico 6.71.3×
- 371BountifulUtah 6.71.3×
- 371MagnaUtah 6.71.3×
- 371TooeleUtah 6.71.3×
- 390SewellNew Jersey 6.61.3×
- 390DyersburgTennessee 6.61.3×
- 390Rose HillVirginia 6.61.3×
- 390BloomingtonIllinois 6.61.3×
- 390MolineIllinois 6.61.3×
- 390LynnMassachusetts 6.61.3×
- 390West FargoNorth Dakota 6.61.3×
- 390BuffaloNew York 6.61.3×
- 390AllentownPennsylvania 6.61.3×
- 390JohnstownPennsylvania 6.61.3×
- 390DenverColorado 6.61.3×
- 390ReddingCalifornia 6.61.3×
- 402DoverDelaware 6.51.3×
- 402GainesvilleFlorida 6.51.3×
- 402BloomingtonIndiana 6.51.3×
- 402Lexington-FayetteKentucky 6.51.3×
- 402AshevilleNorth Carolina 6.51.3×
- 402MasonOhio 6.51.3×
- 402Shaker HeightsOhio 6.51.3×
- 402MadisonWisconsin 6.51.3×
- 402TucsonArizona 6.51.3×
- 402Thousand OaksCalifornia 6.51.3×
- 402MoscowIdaho 6.51.3×
- 402PocatelloIdaho 6.51.3×
- 414DavieFlorida 6.41.3×
- 414Fruit CoveFlorida 6.41.3×
- 414Fort ThomasKentucky 6.41.3×
- 414ClarksvilleTennessee 6.41.3×
- 414CookevilleTennessee 6.41.3×
- 414Cleveland HeightsOhio 6.41.3×
- 414LimaOhio 6.41.3×
- 414RutlandVermont 6.41.3×
- 414Eau ClaireWisconsin 6.41.3×
- 414Casas AdobesArizona 6.41.3×
- 414San LeandroCalifornia 6.41.3×
- 414Santa CruzCalifornia 6.41.3×
- 414AmarilloTexas 6.41.3×
- 414Fort CollinsColorado 6.41.3×
- 414Spanish ForkUtah 6.41.3×
- 414SpokaneWashington 6.41.3×
- 430Palm CityFlorida 6.31.3×
- 430WellingtonFlorida 6.31.3×
- 430SpringfieldMissouri 6.31.3×
- 430TacomaWashington 6.31.3×
- 434BearDelaware 6.21.2×
- 434EdgewoodMaryland 6.21.2×
- 434GreenvilleNorth Carolina 6.21.2×
- 434LebanonOhio 6.21.2×
- 434HartfordConnecticut 6.21.2×
- 434RochesterNew York 6.21.2×
- 434State CollegePennsylvania 6.21.2×
- 434BrookingsSouth Dakota 6.21.2×
- 434Green BayWisconsin 6.21.2×
- 434San FranciscoCalifornia 6.21.2×
- 434Carson CityNevada 6.21.2×
- 434MissoulaMontana 6.21.2×
- 434North OgdenUtah 6.21.2×
- 447Safety HarborFlorida 6.11.2×
- 447RaymoreMissouri 6.11.2×
- 447KingsportTennessee 6.11.2×
- 447RoanokeVirginia 6.11.2×
- 447New HavenConnecticut 6.11.2×
- 447HermitagePennsylvania 6.11.2×
- 447AppletonWisconsin 6.11.2×
- 447SuperiorWisconsin 6.11.2×
- 447Weirton HeightsWest Virginia 6.11.2×
- 447SalinasCalifornia 6.11.2×
- 447RenoNevada 6.11.2×
- 447Coeur d'AleneIdaho 6.11.2×
- 447Grants PassOregon 6.11.2×
- 447HighlandUtah 6.11.2×
- 447Oxon Hill-GlassmanorMaryland 6.11.2×
- 462ElktonMaryland 6.01.2×
- 462RockvilleMaryland 6.01.2×
- 462South VinelandNew Jersey 6.01.2×
- 462WaterburyConnecticut 6.01.2×
- 462ZionIllinois 6.01.2×
- 462SpringfieldMassachusetts 6.01.2×
- 462AugustaMaine 6.01.2×
- 462KeeneNew Hampshire 6.01.2×
- 462BridgeportConnecticut 6.01.2×
- 462FillmoreCalifornia 6.01.2×
- 462GaltCalifornia 6.01.2×
- 462NipomoCalifornia 6.01.2×
- 462AuburnWashington 6.01.2×
- 462Port AngelesWashington 6.01.2×
- 462SeattleWashington 6.01.2×
- 477Des MoinesIowa 5.91.2×
- 477BostonMassachusetts 5.91.2×
- 477AltoonaPennsylvania 5.91.2×
- 477EriePennsylvania 5.91.2×
- 477Arroyo GrandeCalifornia 5.91.2×
- 477Redwood CityCalifornia 5.91.2×
- 477Dodge CityKansas 5.91.2×
- 477EugeneOregon 5.91.2×
- 477HermistonOregon 5.91.2×
- 477MilwaukieOregon 5.91.2×
- 477GilletteWyoming 5.91.2×
- 488Atlantic CityNew Jersey 5.81.2×
- 488PleasantvilleNew Jersey 5.81.2×
- 488HopewellVirginia 5.81.2×
- 488PortlandMaine 5.81.2×
- 488DuluthMinnesota 5.81.2×
- 488New BrunswickNew Jersey 5.81.2×
- 488NewburghNew York 5.81.2×
- 488PainesvilleOhio 5.81.2×
- 488LincolnCalifornia 5.81.2×
- 488TigardOregon 5.81.2×
- 488HerrimanUtah 5.81.2×
- 488Spokane ValleyWashington 5.81.2×
- 500Palm BayFlorida 5.71.1×
- 500GreenfieldMassachusetts 5.71.1×
- 500HolbrookNew York 5.71.1×
- 500UticaNew York 5.71.1×
- 500Colorado SpringsColorado 5.71.1×
- 500PendletonOregon 5.71.1×
- 500BellinghamWashington 5.71.1×
- 500ParklandWashington 5.71.1×
- 508MuscatineIowa 5.61.1×
- 508BrocktonMassachusetts 5.61.1×
- 508GahannaOhio 5.61.1×
- 508PawtucketRhode Island 5.61.1×
- 508ProvidenceRhode Island 5.61.1×
- 508AberdeenSouth Dakota 5.61.1×
- 508FolsomCalifornia 5.61.1×
- 508OrcuttCalifornia 5.61.1×
- 508TracyCalifornia 5.61.1×
- 508Spanish SpringsNevada 5.61.1×
- 518New LondonConnecticut 5.51.1×
- 518LincolnNebraska 5.51.1×
- 518Idaho FallsIdaho 5.51.1×
- 518AshlandOregon 5.51.1×
- 518The DallesOregon 5.51.1×
- 518Moses LakeWashington 5.51.1×
- 518Walla WallaWashington 5.51.1×
- 525LowellMassachusetts 5.41.1×
- 525WorcesterMassachusetts 5.41.1×
- 525White PlainsNew York 5.41.1×
- 525San RafaelCalifornia 5.41.1×
- 525WenatcheeWashington 5.41.1×
- 530WestonFlorida 5.31.1×
- 530LibertyMissouri 5.31.1×
- 530PittsfieldMassachusetts 5.31.1×
- 530PortsmouthNew Hampshire 5.31.1×
- 530BayonneNew Jersey 5.31.1×
- 530AtascaderoCalifornia 5.31.1×
- 530HendersonNevada 5.31.1×
- 530Spring ValleyNevada 5.31.1×
- 530AnchorageAlaska 5.31.1×
- 539HagerstownMaryland 5.21.0×
- 539SyracuseNew York 5.21.0×
- 539LancasterCalifornia 5.21.0×
- 539ParadiseCalifornia 5.21.0×
- 539LubbockTexas 5.21.0×
- 539SalemOregon 5.21.0×
- 545Fall RiverMassachusetts 5.11.0×
- 545QuincyMassachusetts 5.11.0×
- 545New CityNew York 5.11.0×
- 545Las CrucesNew Mexico 5.11.0×
- 545RandolphNew Jersey 5.11.0×
- 550North ChicopeeMassachusetts 5.01.0×
- 550Sioux FallsSouth Dakota 5.01.0×
- 550Grand JunctionColorado 5.01.0×
- 550ShorelineWashington 5.01.0×
- 550Summerlin SouthNevada 5.01.0×
- 555South LaurelMaryland 4.91.0×
- 555BangorMaine 4.91.0×
- 555DavisCalifornia 4.91.0×
- 555HillsboroOregon 4.91.0×
- 559DerryNew Hampshire 4.81.0×
- 559LaconiaNew Hampshire 4.81.0×
- 559LompocCalifornia 4.81.0×
- 559TruckeeCalifornia 4.81.0×
- 563PuebloColorado 4.70.9×
- 563Apache JunctionArizona 4.70.9×
- 563RoseburgOregon 4.70.9×
- 563Makakilo / Kapolei / Honokai HaleHawaii 4.70.9×
- 567LewistonMaine 4.60.9×
- 567San Luis ObispoCalifornia 4.60.9×
- 567VacavilleCalifornia 4.60.9×
- 567CanbyOregon 4.60.9×
- 567GreshamOregon 4.60.9×
- 567WoodburnOregon 4.60.9×
- 567CentraliaWashington 4.60.9×
- 567EllensburgWashington 4.60.9×
- 567LongviewWashington 4.60.9×
- 567PullmanWashington 4.60.9×
- 577Ken CarylColorado 4.50.9×
- 577Cedar CityUtah 4.50.9×
- 577AlbanyOregon 4.50.9×
- 580EnterpriseNevada 4.40.9×
- 580Salmon CreekWashington 4.40.9×
- 580Rock SpringsWyoming 4.40.9×
- 583PortlandOregon 4.30.9×
- 583LaceyWashington 4.30.9×
- 585BremertonWashington 4.20.8×
- 585VancouverWashington 4.20.8×
- 585CasperWyoming 4.20.8×
- 585KahuluiHawaii 4.20.8×
- 589CoventryRhode Island 4.10.8×
- 589CheyenneWyoming 4.10.8×
- 589HonoluluHawaii 4.10.8×
- 589Tri-CitiesWashington 4.10.8×
- 593MesquiteNevada 4.00.8×
- 593BeavertonOregon 4.00.8×
- 593Coos BayOregon 4.00.8×
- 596Boulder CityNevada 3.90.8×
- 596HurricaneUtah 3.90.8×
- 598Forest GroveOregon 3.70.7×
- 598AnacortesWashington 3.70.7×
- 600AberdeenWashington 3.60.7×
- 601McMinnvilleOregon 3.50.7×
- 602DallasOregon 3.40.7×
- 603Green ValleyArizona 3.30.7×
- 604CorvallisOregon 3.20.6×
- 604KīheiHawaii 3.20.6×
- 606HiloHawaii 3.10.6×
- 607BellevueWashington 3.00.6×
- 607LaramieWyoming 3.00.6×
- 609Mount VernonWashington 2.90.6×
- 610Oak HarborWashington 2.60.5×
- 611MarysvilleWashington 1.50.3×
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+