SmogRank / Countries / United States / October 2024
Most polluted cities in United States, October 2024
623 cities in United States ranked by their average PM2.5 over the 31 days. Worst: Sheridan at 22.9 µg/m³, #53 of 1,561 cities in the world. Cleanest: Marysville at 0.4. A city needs measurements on 70% of the days to be ranked.
- 1SheridanWyoming 22.9
- 2BirminghamAlabama 19.4
- 3Jurupa ValleyCalifornia 18.0
- 4BartlettTennessee 17.2
- 5Los AngelesCalifornia 16.9
- 6VisaliaCalifornia 16.0
- 7Little RockArkansas 15.9
- 8HernandoMississippi 15.8
- 9FontanaCalifornia 15.7
- 10RiversideCalifornia 15.3
- 11Hawthornelow-cost sensorsCalifornia 15.1
- 12AugustaGeorgia 14.9
- 12ColumbusOhio 14.9
- 14Inglewoodlow-cost sensorsCalifornia 14.6
- 15BurbankCalifornia 14.4
- 15El PasoTexas 14.4
- 17Carsonlow-cost sensorsCalifornia 14.1
- 17FresnoCalifornia 14.1
- 19HanfordCalifornia 13.7
- 20IndianapolisIndiana 13.6
- 20HattiesburgMississippi 13.6
- 22West MemphisArkansas 13.5
- 22NogalesArizona 13.5
- 24AnaheimCalifornia 13.4
- 25Sunland ParkNew Mexico 13.3
- 26HelenaMontana 13.1
- 27GulfportMississippi 12.9
- 27ComptonCalifornia 12.9
- 29Santa Monicalow-cost sensorsCalifornia 12.8
- 29Torrancelow-cost sensorsCalifornia 12.8
- 31Port ArthurTexas 12.7
- 32BellevueNebraska 12.6
- 33DallasTexas 12.5
- 33Sioux FallsSouth Dakota 12.5
- 35LafayetteLouisiana 12.4
- 35YumaArizona 12.4
- 35ClovisCalifornia 12.4
- 35Santa ClaritaCalifornia 12.4
- 39East RidgeTennessee 12.2
- 40CalexicoCalifornia 12.1
- 41ShreveportLouisiana 12.0
- 41HoustonTexas 12.0
- 41BakersfieldCalifornia 12.0
- 41PortervilleCalifornia 12.0
- 45HueytownAlabama 11.9
- 45GlendoraCalifornia 11.9
- 45BendOregon 11.9
- 48ValdostaGeorgia 11.8
- 48SocorroTexas 11.8
- 50Baton RougeLouisiana 11.7
- 50JacksonMississippi 11.7
- 50GreeleyColorado 11.7
- 53SpringdaleArkansas 11.6
- 53Chula VistaCalifornia 11.6
- 55ColumbusGeorgia 11.5
- 55Terre HauteIndiana 11.5
- 55Columbialow-cost sensorsMissouri 11.5
- 55Casa GrandeArizona 11.5
- 55CorcoranCalifornia 11.5
- 55Lomitalow-cost sensorsCalifornia 11.5
- 55Fort CollinsColorado 11.5
- 62McAlesterOklahoma 11.4
- 63BessemerAlabama 11.3
- 63ThorntonColorado 11.3
- 65ConroeTexas 11.2
- 65BrookingsSouth Dakota 11.2
- 65Long BeachCalifornia 11.2
- 68RedfordMichigan 11.1
- 68ButteMontana 11.1
- 68La Crescenta-Montroselow-cost sensorsCalifornia 11.1
- 71TrussvilleAlabama 11.0
- 71GainesvilleGeorgia 11.0
- 71Agouralow-cost sensorsCalifornia 11.0
- 74SavannahGeorgia 10.9
- 74GreenvilleSouth Carolina 10.9
- 74PasadenaTexas 10.9
- 74San DiegoCalifornia 10.9
- 78MaconGeorgia 10.8
- 78MiddletownOhio 10.8
- 80Granite CityIllinois 10.7
- 80SpartanburgSouth Carolina 10.7
- 82West MifflinPennsylvania 10.6
- 82WatertownSouth Dakota 10.6
- 82El CajonCalifornia 10.6
- 82LongmontColorado 10.6
- 86DerbyKansas 10.5
- 87MasonOhio 10.4
- 87WaterlooIowa 10.4
- 87ElkhartIndiana 10.4
- 90SulphurLouisiana 10.3
- 90PascagoulaMississippi 10.3
- 92JeffersonvilleIndiana 10.2
- 92PhoenixArizona 10.2
- 94Upper AltonIllinois 10.1
- 94Oklahoma CityOklahoma 10.1
- 94Missouri CityTexas 10.1
- 94RochesterMinnesota 10.1
- 94OregonOhio 10.1
- 94Santa BarbaraCalifornia 10.1
- 94DenverColorado 10.1
- 94Northglennlow-cost sensorsColorado 10.1
- 102LawrencevilleGeorgia 10.0
- 102AlbuquerqueNew Mexico 10.0
- 102BozemanMontana 10.0
- 102MillcreekUtah 10.0
- 106MooreOklahoma 9.9
- 106WyomingMichigan 9.9
- 106CantonOhio 9.9
- 106Rio RanchoNew Mexico 9.9
- 106Great FallsMontana 9.9
- 106Candler-McAfeeGeorgia 9.9
- 112Ferry PassFlorida 9.8
- 112BaytownTexas 9.8
- 112ToledoOhio 9.8
- 112BerkeleyCalifornia 9.8
- 116AtlantaGeorgia 9.7
- 116East Saint LouisIllinois 9.7
- 116St. LouisMissouri 9.7
- 116NashvilleTennessee 9.7
- 116TexarkanaTexas 9.7
- 121KennesawGeorgia 9.6
- 121TopekaKansas 9.6
- 121BrookfieldIllinois 9.6
- 121DetroitMichigan 9.6
- 121MankatoMinnesota 9.6
- 121BrawleyCalifornia 9.6
- 121VictorvilleCalifornia 9.6
- 128ChalmetteLouisiana 9.5
- 128ChattanoogaTennessee 9.5
- 128IndioCalifornia 9.5
- 128Brightonlow-cost sensorsColorado 9.5
- 128Colorado SpringsColorado 9.5
- 128LittletonColorado 9.5
- 128MidwayFlorida 9.5
- 135EvansvilleIndiana 9.4
- 135LexingtonNorth Carolina 9.4
- 135Iowa CityIowa 9.4
- 135StocktonCalifornia 9.4
- 139LouisvilleKentucky 9.3
- 139Hunt ValleyMaryland 9.3
- 139Saint JosephMissouri 9.3
- 139TulsaOklahoma 9.3
- 139KnoxvilleTennessee 9.3
- 139Fort WayneIndiana 9.3
- 139DearbornMichigan 9.3
- 139RichmondCalifornia 9.3
- 139ReddingCalifornia 9.3
- 139BillingsMontana 9.3
- 149CharlotteNorth Carolina 9.2
- 149NorwoodOhio 9.2
- 149Cedar RapidsIowa 9.2
- 149ElginIllinois 9.2
- 149WestervilleOhio 9.2
- 154AlbanyGeorgia 9.1
- 154AthensGeorgia 9.1
- 154Kansas CityKansas 9.1
- 154KennerLouisiana 9.1
- 154Fort WorthTexas 9.1
- 154MuncieIndiana 9.1
- 154MaranaArizona 9.1
- 161FairhopeAlabama 9.0
- 161GadsdenAlabama 9.0
- 161Live OakTexas 9.0
- 161MissionTexas 9.0
- 161Mission BendTexas 9.0
- 161GaryIndiana 9.0
- 161MaderaCalifornia 9.0
- 161Rapid CitySouth Dakota 9.0
- 169ValricoFlorida 8.9
- 169DurhamNorth Carolina 8.9
- 169DaytonOhio 8.9
- 169North CharlestonSouth Carolina 8.9
- 169WoodlandCalifornia 8.9
- 174DecaturIllinois 8.8
- 174ClintonIowa 8.8
- 174KalamazooMichigan 8.8
- 174EwingNew Jersey 8.8
- 174WarrenOhio 8.8
- 179West PensacolaFlorida 8.7
- 179Valley StationKentucky 8.7
- 179AustinTexas 8.7
- 179OmahaNebraska 8.7
- 183TampaFlorida 8.6
- 183New OrleansLouisiana 8.6
- 183SpringfieldOhio 8.6
- 183JenksOklahoma 8.6
- 183FlorenceSouth Carolina 8.6
- 183Saint AndrewsSouth Carolina 8.6
- 183LancasterPennsylvania 8.6
- 183TucsonArizona 8.6
- 183PowayCalifornia 8.6
- 183San JoseCalifornia 8.6
- 193PaducahKentucky 8.5
- 193HuntsvilleAlabama 8.5
- 193BrunswickGeorgia 8.5
- 193Warner RobinsGeorgia 8.5
- 193EdmondOklahoma 8.5
- 193AnkenyIowa 8.5
- 193PeoriaIllinois 8.5
- 193LafayetteIndiana 8.5
- 193BurnsvilleMinnesota 8.5
- 193Casas AdobesArizona 8.5
- 193TurlockCalifornia 8.5
- 193EugeneOregon 8.5
- 205Saint MatthewsKentucky 8.4
- 205HickoryNorth Carolina 8.4
- 205CincinnatiOhio 8.4
- 205White OakOhio 8.4
- 205Ponca CityOklahoma 8.4
- 205CaryIllinois 8.4
- 205La VistaNebraska 8.4
- 205Lake ElsinoreCalifornia 8.4
- 205UkiahCalifornia 8.4
- 214Ponte Vedra BeachFlorida 8.3
- 214McDonoughGeorgia 8.3
- 214University CityMissouri 8.3
- 214DavenportIowa 8.3
- 214NapervilleIllinois 8.3
- 214Grand RapidsMichigan 8.3
- 214SteubenvilleOhio 8.3
- 214Arvadalow-cost sensorsColorado 8.3
- 214NampaIdaho 8.3
- 214RexburgIdaho 8.3
- 214MissoulaMontana 8.3
- 225OlatheKansas 8.2
- 225ChicagoIllinois 8.2
- 225RockfordIllinois 8.2
- 225DublinOhio 8.2
- 225WaukeshaWisconsin 8.2
- 225HollisterCalifornia 8.2
- 225OceansideCalifornia 8.2
- 225Arden-ArcadeCalifornia 8.2
- 233LemayMissouri 8.1
- 233AshevilleNorth Carolina 8.1
- 233Winston-SalemNorth Carolina 8.1
- 233HendersonvilleTennessee 8.1
- 233JolietIllinois 8.1
- 233FlintMichigan 8.1
- 233ClevelandOhio 8.1
- 233Grand JunctionColorado 8.1
- 233MilwaukieOregon 8.1
- 233YakimaWashington 8.1
- 243MontgomeryAlabama 8.0
- 243JeffersontownKentucky 8.0
- 243Lexington-FayetteKentucky 8.0
- 243LawtonOklahoma 8.0
- 243KokomoIndiana 8.0
- 243Lincoln ParkMichigan 8.0
- 243SacramentoCalifornia 8.0
- 243Dodge CityKansas 8.0
- 243RedmondOregon 8.0
- 243GilletteWyoming 8.0
- 253JacksonvilleFlorida 7.9
- 253FishersIndiana 7.9
- 253CorsicanaTexas 7.9
- 253San AntonioTexas 7.9
- 253Calumet CityIllinois 7.9
- 253TaylorMichigan 7.9
- 253AkronOhio 7.9
- 253McKeesportPennsylvania 7.9
- 253MantecaCalifornia 7.9
- 253PuebloColorado 7.9
- 253Las VegasNevada 7.9
- 253OdessaTexas 7.9
- 253BoulderColorado 7.9
- 266NewarkDelaware 7.8
- 266SpringfieldIllinois 7.8
- 266New AlbanyIndiana 7.8
- 266ClaytonNorth Carolina 7.8
- 266MorrisvilleNorth Carolina 7.8
- 266ConwaySouth Carolina 7.8
- 266College StationTexas 7.8
- 266MinneapolisMinnesota 7.8
- 266Saint PaulMinnesota 7.8
- 266AberdeenSouth Dakota 7.8
- 266TempeArizona 7.8
- 266OaklandCalifornia 7.8
- 266Simi ValleyCalifornia 7.8
- 266MeridianIdaho 7.8
- 266OremUtah 7.8
- 266West JordanUtah 7.8
- 282GreensboroNorth Carolina 7.7
- 282BeltonTexas 7.7
- 282HollandMichigan 7.7
- 282MilwaukeeWisconsin 7.7
- 282GlendaleArizona 7.7
- 282PocatelloIdaho 7.7
- 282Salt Lake CityUtah 7.7
- 289ArnoldMissouri 7.6
- 289PhiladelphiaPennsylvania 7.6
- 289Corpus ChristiTexas 7.6
- 289HuntingtonWest Virginia 7.6
- 289PerrysburgOhio 7.6
- 289BensalemPennsylvania 7.6
- 289MesaArizona 7.6
- 289ModestoCalifornia 7.6
- 289LewistonIdaho 7.6
- 298BaltimoreMaryland 7.5
- 298RaleighNorth Carolina 7.5
- 298DentonTexas 7.5
- 298HarrisburgPennsylvania 7.5
- 298NipomoCalifornia 7.5
- 298Yuba CityCalifornia 7.5
- 298AmarilloTexas 7.5
- 305AshlandKentucky 7.4
- 305HammondIndiana 7.4
- 305El CentroCalifornia 7.4
- 305BoiseIdaho 7.4
- 305MoscowIdaho 7.4
- 305West Valley CityUtah 7.4
- 305TacomaWashington 7.4
- 312Fort SmithArkansas 7.3
- 312PortsmouthOhio 7.3
- 312EdinburgTexas 7.3
- 312GalvestonTexas 7.3
- 312ChampaignIllinois 7.3
- 312MolineIllinois 7.3
- 312South BendIndiana 7.3
- 312ShakopeeMinnesota 7.3
- 312West FargoNorth Dakota 7.3
- 312LebanonPennsylvania 7.3
- 312MartinezCalifornia 7.3
- 312VallejoCalifornia 7.3
- 312BadgerAlaska 7.3
- 325ClemmonsNorth Carolina 7.2
- 325Toms RiverNew Jersey 7.2
- 325YorkPennsylvania 7.2
- 325La PorteTexas 7.2
- 325New HavenConnecticut 7.2
- 325BloomingtonIllinois 7.2
- 325Franklin ParkIllinois 7.2
- 325AndersonIndiana 7.2
- 325PortageIndiana 7.2
- 325EastpointeMichigan 7.2
- 325Saint MichaelMinnesota 7.2
- 325PittsburghPennsylvania 7.2
- 325Thousand OaksCalifornia 7.2
- 325Columbia CityWashington 7.2
- 325AnchorageAlaska 7.2
- 340MiamiFlorida 7.1
- 340ColumbusIndiana 7.1
- 340Kansas CityMissouri 7.1
- 340PleasantvilleNew Jersey 7.1
- 340Des PlainesIllinois 7.1
- 340East ChicagoIndiana 7.1
- 340Port HuronMichigan 7.1
- 340Apple ValleyMinnesota 7.1
- 340BanningCalifornia 7.1
- 340Spanish SpringsNevada 7.1
- 340MagnaUtah 7.1
- 351RockvilleMaryland 7.0
- 351ClarksvilleTennessee 7.0
- 351BlaineMinnesota 7.0
- 351Saint CloudMinnesota 7.0
- 351YoungstownOhio 7.0
- 351South MilwaukeeWisconsin 7.0
- 351ChicoCalifornia 7.0
- 351Goletalow-cost sensorsCalifornia 7.0
- 351Ken CarylColorado 7.0
- 351HobbsNew Mexico 7.0
- 351Spanish ForkUtah 7.0
- 362BloomingtonIndiana 6.9
- 362LebanonOhio 6.9
- 362JacksonTennessee 6.9
- 362Des MoinesIowa 6.9
- 362NorthbrookIllinois 6.9
- 362Michigan CityIndiana 6.9
- 362LynnMassachusetts 6.9
- 362New York CityNew York 6.9
- 362PawtucketRhode Island 6.9
- 362Idaho FallsIdaho 6.9
- 362CasperWyoming 6.9
- 373EdgewoodMaryland 6.8
- 373ChesterPennsylvania 6.8
- 373AshburnVirginia 6.8
- 373ChesapeakeVirginia 6.8
- 373WheelingWest Virginia 6.8
- 373FillmoreCalifornia 6.8
- 373Las CrucesNew Mexico 6.8
- 373TigardOregon 6.8
- 381DecaturAlabama 6.7
- 381Fruit CoveFlorida 6.7
- 381PennsaukenNew Jersey 6.7
- 381DyersburgTennessee 6.7
- 381RichmondVirginia 6.7
- 381Bay CityMichigan 6.7
- 381TrentonNew Jersey 6.7
- 381KenmoreNew York 6.7
- 381WilkinsburgPennsylvania 6.7
- 381Eagle PassTexas 6.7
- 381TooeleUtah 6.7
- 392WashingtonDistrict of Columbia 6.6
- 392Bonita SpringsFlorida 6.6
- 392ScaggsvilleMaryland 6.6
- 392RaymoreMissouri 6.6
- 392DanburyConnecticut 6.6
- 392YpsilantiMichigan 6.6
- 392LindenNew Jersey 6.6
- 392BismarckNorth Dakota 6.6
- 400BrownsvilleTexas 6.5
- 400HarrisonburgVirginia 6.5
- 400LansingMichigan 6.5
- 400CarlislePennsylvania 6.5
- 400SalinasCalifornia 6.5
- 400Lakewoodlow-cost sensorsColorado 6.5
- 400North OgdenUtah 6.5
- 400CheyenneWyoming 6.5
- 408Delray BeachFlorida 6.4
- 408JasperIndiana 6.4
- 408ColumbiaTennessee 6.4
- 408CookevilleTennessee 6.4
- 408MaryvilleTennessee 6.4
- 408JenisonMichigan 6.4
- 408WeirtonWest Virginia 6.4
- 408South Lake TahoeCalifornia 6.4
- 408HendersonNevada 6.4
- 408BountifulUtah 6.4
- 408RentonWashington 6.4
- 419Fort LauderdaleFlorida 6.3
- 419LaredoTexas 6.3
- 419East HamptonVirginia 6.3
- 419CharlestonWest Virginia 6.3
- 419BethlehemPennsylvania 6.3
- 419JohnstownPennsylvania 6.3
- 419Santa CruzCalifornia 6.3
- 419AltamontOregon 6.3
- 419MedfordOregon 6.3
- 419BellinghamWashington 6.3
- 429ZionIllinois 6.2
- 429HaverhillMassachusetts 6.2
- 429HermitagePennsylvania 6.2
- 429ReadingPennsylvania 6.2
- 429LancasterCalifornia 6.2
- 429Prunedalelow-cost sensorsCalifornia 6.2
- 429RosevilleCalifornia 6.2
- 429Coeur d'AleneIdaho 6.2
- 429HighlandUtah 6.2
- 429SeattleWashington 6.2
- 439WilmingtonDelaware 6.1
- 439South LaurelMaryland 6.1
- 439HopewellVirginia 6.1
- 439RoanokeVirginia 6.1
- 439SpringfieldVirginia 6.1
- 439ElizabethNew Jersey 6.1
- 439MedinaOhio 6.1
- 439NorristownPennsylvania 6.1
- 439ProvidenceRhode Island 6.1
- 439AppletonWisconsin 6.1
- 439Eau ClaireWisconsin 6.1
- 439Green BayWisconsin 6.1
- 439MadisonWisconsin 6.1
- 439Port AngelesWashington 6.1
- 439SpokaneWashington 6.1
- 454Fort ThomasKentucky 6.0
- 454Roanoke RapidsNorth Carolina 6.0
- 454CharlottesvilleVirginia 6.0
- 454SpringfieldMassachusetts 6.0
- 454Jersey CityNew Jersey 6.0
- 454BuffaloNew York 6.0
- 454MercedCalifornia 6.0
- 454OrcuttCalifornia 6.0
- 462BearDelaware 5.9
- 462SewellNew Jersey 5.9
- 462Lexingtonlow-cost sensorsMassachusetts 5.9
- 462PatersonNew Jersey 5.9
- 462ScrantonPennsylvania 5.9
- 462Live Oaklow-cost sensorsCalifornia 5.9
- 462OxnardCalifornia 5.9
- 462San LeandroCalifornia 5.9
- 462Watsonvillelow-cost sensorsCalifornia 5.9
- 462RenoNevada 5.9
- 462Twin FallsIdaho 5.9
- 462HerrimanUtah 5.9
- 462Spokane ValleyWashington 5.9
- 475ElktonMaryland 5.8
- 475GreenvilleNorth Carolina 5.8
- 475Rose HillVirginia 5.8
- 475AllentownPennsylvania 5.8
- 475Redwood CityCalifornia 5.8
- 475CanbyOregon 5.8
- 475SalemOregon 5.8
- 475AuburnWashington 5.8
- 475Moses LakeWashington 5.8
- 475Oxon Hill-GlassmanorMaryland 5.8
- 485SpringfieldMissouri 5.7
- 485HartfordConnecticut 5.7
- 485WaterburyConnecticut 5.7
- 485LaconiaNew Hampshire 5.7
- 485Carson CityNevada 5.7
- 485Summerlin SouthNevada 5.7
- 491Atlantic CityNew Jersey 5.6
- 491South VinelandNew Jersey 5.6
- 491Fort LeeNew Jersey 5.6
- 491SuperiorWisconsin 5.6
- 491BridgeportConnecticut 5.6
- 491LivermoreCalifornia 5.6
- 491PortlandOregon 5.6
- 491ParklandWashington 5.6
- 499DoverDelaware 5.5
- 499Belle GladeFlorida 5.5
- 499HomesteadFlorida 5.5
- 499KingsportTennessee 5.5
- 499BostonMassachusetts 5.5
- 499HolbrookNew York 5.5
- 499AltoonaPennsylvania 5.5
- 499LompocCalifornia 5.5
- 499TracyCalifornia 5.5
- 499LubbockTexas 5.5
- 499Cedar CityUtah 5.5
- 499WoodburnOregon 5.5
- 511Deerfield BeachFlorida 5.4
- 511KeeneNew Hampshire 5.4
- 511New BrunswickNew Jersey 5.4
- 511Weirton HeightsWest Virginia 5.4
- 511CondaIdaho 5.4
- 511AlbanyOregon 5.4
- 511HermistonOregon 5.4
- 511HillsboroOregon 5.4
- 519DavieFlorida 5.3
- 519MuscatineIowa 5.3
- 519AlbanyNew York 5.3
- 519LimaOhio 5.3
- 519State CollegePennsylvania 5.3
- 519Arroyo GrandeCalifornia 5.3
- 519CentraliaWashington 5.3
- 519WenatcheeWashington 5.3
- 527WellingtonFlorida 5.2
- 527LibertyMissouri 5.2
- 527Cleveland HeightsOhio 5.2
- 527BrocktonMassachusetts 5.2
- 527GreenfieldMassachusetts 5.2
- 527LowellMassachusetts 5.2
- 527PittsfieldMassachusetts 5.2
- 527Shaker HeightsOhio 5.2
- 527DavisCalifornia 5.2
- 527GaltCalifornia 5.2
- 537RutlandVermont 5.1
- 537AtascaderoCalifornia 5.1
- 537San Luis ObispoCalifornia 5.1
- 537San RafaelCalifornia 5.1
- 537Seasidelow-cost sensorsCalifornia 5.1
- 537Apache JunctionArizona 5.1
- 537LaceyWashington 5.1
- 537ShorelineWashington 5.1
- 537VancouverWashington 5.1
- 546BayonneNew Jersey 5.0
- 546RidgecrestCalifornia 5.0
- 546Spring ValleyNevada 5.0
- 546LongviewWashington 5.0
- 546Walla WallaWashington 5.0
- 546FairbanksAlaska 5.0
- 552Coconut CreekFlorida 4.9
- 552New LondonConnecticut 4.9
- 552WorcesterMassachusetts 4.9
- 552NewburghNew York 4.9
- 552RochesterNew York 4.9
- 552White PlainsNew York 4.9
- 552PainesvilleOhio 4.9
- 552EriePennsylvania 4.9
- 552LincolnCalifornia 4.9
- 552AnacortesWashington 4.9
- 552Rock SpringsWyoming 4.9
- 552Picnic Point-North LynnwoodWashington 4.9
- 564PortlandMaine 4.8
- 565DuluthMinnesota 4.7
- 565LincolnNebraska 4.7
- 565DerryNew Hampshire 4.7
- 565PortsmouthNew Hampshire 4.7
- 565UticaNew York 4.7
- 565PendletonOregon 4.7
- 565EllensburgWashington 4.7
- 565RandolphNew Jersey 4.7
- 573Fall RiverMassachusetts 4.6
- 573North ChicopeeMassachusetts 4.6
- 573QuincyMassachusetts 4.6
- 573BangorMaine 4.6
- 573Palo Altolow-cost sensorsCalifornia 4.6
- 573PleasantonCalifornia 4.6
- 573VacavilleCalifornia 4.6
- 573Grants PassOregon 4.6
- 573Salmon CreekWashington 4.6
- 582AugustaMaine 4.5
- 582CoventryRhode Island 4.5
- 582EnterpriseNevada 4.5
- 582Coos BayOregon 4.5
- 586HagerstownMaryland 4.4
- 586LewistonMaine 4.4
- 586FolsomCalifornia 4.4
- 586HurricaneUtah 4.4
- 586GreshamOregon 4.4
- 586The DallesOregon 4.4
- 586PullmanWashington 4.4
- 593WestonFlorida 4.3
- 593AshlandOregon 4.3
- 593BeavertonOregon 4.3
- 593BremertonWashington 4.3
- 593Makakilo / Kapolei / Honokai HaleHawaii 4.3
- 598TruckeeCalifornia 4.2
- 599MarquetteMichigan 4.1
- 599SyracuseNew York 4.1
- 599Green ValleyArizona 4.1
- 599GilroyCalifornia 4.1
- 603New CityNew York 4.0
- 603MesquiteNevada 4.0
- 603RoseburgOregon 4.0
- 606McMinnvilleOregon 3.7
- 606AberdeenWashington 3.7
- 608Boulder CityNevada 3.6
- 609CorvallisOregon 3.5
- 609LaramieWyoming 3.5
- 609KahuluiHawaii 3.5
- 612Santa RosaCalifornia 3.4
- 612HonoluluHawaii 3.4
- 614Florinlow-cost sensorsCalifornia 3.3
- 615BellevueWashington 3.2
- 616DallasOregon 3.0
- 617ConcordCalifornia 2.9
- 618KīheiHawaii 2.8
- 619HiloHawaii 2.7
- 620Tri-CitiesWashington 2.6
- 621Mount VernonWashington 1.5
- 622Oak HarborWashington 1.2
- 623MarysvilleWashington 0.4
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+