SmogRank / Countries / United States / December 2024
Most polluted cities in United States, December 2024
639 cities in United States ranked by their average PM2.5 over the 31 days. Worst: Bakersfield at 29.0 µg/m³, #82 of 2,078 cities in the world. Cleanest: Mount Vernon at 1.3. A city needs measurements on 70% of the days to be ranked.
- 1BakersfieldCalifornia 29.0
- 2Jurupa ValleyCalifornia 26.3
- 3FresnoCalifornia 26.2
- 4HanfordCalifornia 25.1
- 5BadgerAlaska 24.2
- 6ComptonCalifornia 23.5
- 7NogalesArizona 23.2
- 7ClovisCalifornia 23.2
- 9PortervilleCalifornia 22.6
- 10PhoenixArizona 22.0
- 11Florinlow-cost sensorsCalifornia 21.7
- 12BurbankCalifornia 21.6
- 13Hawthornelow-cost sensorsCalifornia 21.5
- 14RiversideCalifornia 21.4
- 15Los AngelesCalifornia 21.3
- 16MaderaCalifornia 21.1
- 17TurlockCalifornia 20.7
- 18CorcoranCalifornia 20.6
- 19FontanaCalifornia 20.5
- 20MercedCalifornia 20.2
- 21AnaheimCalifornia 20.1
- 22Carsonlow-cost sensorsCalifornia 20.0
- 23Long BeachCalifornia 19.0
- 23MantecaCalifornia 19.0
- 25Inglewoodlow-cost sensorsCalifornia 18.8
- 26Torrancelow-cost sensorsCalifornia 17.5
- 27MillcreekUtah 16.7
- 28WoodlandCalifornia 16.5
- 29Lomitalow-cost sensorsCalifornia 15.3
- 30Columbialow-cost sensorsMissouri 15.2
- 30Santa Monicalow-cost sensorsCalifornia 15.2
- 32West JordanUtah 15.1
- 33San DiegoCalifornia 14.8
- 34BerkeleyCalifornia 14.7
- 35AugustaGeorgia 14.5
- 36Chula VistaCalifornia 14.4
- 36San JoseCalifornia 14.4
- 36Las VegasNevada 14.4
- 39GlendaleArizona 14.3
- 40MesaArizona 14.1
- 40SacramentoCalifornia 14.1
- 42Oconomowoclow-cost sensorsWisconsin 13.6
- 42Casa GrandeArizona 13.6
- 42VallejoCalifornia 13.6
- 45El CajonCalifornia 13.5
- 45Palo Altolow-cost sensorsCalifornia 13.5
- 45FairbanksAlaska 13.5
- 48BirminghamAlabama 13.4
- 48TempeArizona 13.4
- 48Arden-ArcadeCalifornia 13.4
- 51Salt Lake CityUtah 13.3
- 52Rio RanchoNew Mexico 13.2
- 53RedfordMichigan 13.0
- 53GlendoraCalifornia 13.0
- 53MedfordOregon 13.0
- 56Lake ElsinoreCalifornia 12.9
- 56MartinezCalifornia 12.9
- 58AlbuquerqueNew Mexico 12.7
- 58West Valley CityUtah 12.7
- 60Santa BarbaraCalifornia 12.6
- 61RichmondCalifornia 12.5
- 62Agouralow-cost sensorsCalifornia 12.4
- 62ChicoCalifornia 12.4
- 64MaranaArizona 12.3
- 64OceansideCalifornia 12.3
- 66OaklandCalifornia 12.2
- 67HoustonTexas 12.0
- 68ValdostaGeorgia 11.9
- 69East RidgeTennessee 11.7
- 69Yuba CityCalifornia 11.7
- 71ColumbusGeorgia 11.6
- 71ConroeTexas 11.6
- 71South San Franciscolow-cost sensorsCalifornia 11.6
- 74GaltCalifornia 11.4
- 75OregonOhio 11.3
- 75BountifulUtah 11.3
- 77Casas AdobesArizona 11.2
- 77OremUtah 11.2
- 79La Crescenta-Montroselow-cost sensorsCalifornia 11.1
- 80SpartanburgSouth Carolina 11.0
- 80HarrisburgPennsylvania 11.0
- 82WichitaKansas 10.9
- 82AltamontOregon 10.9
- 84GreenvilleSouth Carolina 10.7
- 84PasadenaTexas 10.7
- 86MaconGeorgia 10.6
- 86TucsonArizona 10.6
- 86AtascaderoCalifornia 10.6
- 86TracyCalifornia 10.6
- 86Great FallsMontana 10.6
- 91MissionTexas 10.5
- 91Port ArthurTexas 10.5
- 91Oak LawnIllinois 10.5
- 94LexingtonNorth Carolina 10.4
- 94CarlislePennsylvania 10.4
- 94LivermoreCalifornia 10.4
- 94Grand JunctionColorado 10.4
- 98HattiesburgMississippi 10.3
- 99RochesterMinnesota 10.1
- 99LebanonPennsylvania 10.1
- 99San RafaelCalifornia 10.1
- 99Santa ClaritaCalifornia 10.1
- 103DallasTexas 10.0
- 103BensalemPennsylvania 10.0
- 103San FranciscoCalifornia 10.0
- 103MagnaUtah 10.0
- 107PerrysburgOhio 9.9
- 107LancasterPennsylvania 9.9
- 109LaconiaNew Hampshire 9.8
- 109Port AngelesWashington 9.8
- 111AlbanyGeorgia 9.7
- 111DurhamNorth Carolina 9.7
- 111PhiladelphiaPennsylvania 9.7
- 111GaryIndiana 9.7
- 111ReadingPennsylvania 9.7
- 111VacavilleCalifornia 9.7
- 111NampaIdaho 9.7
- 118LawrencevilleGeorgia 9.6
- 118Elmwood ParkIllinois 9.6
- 118San LeandroCalifornia 9.6
- 118VictorvilleCalifornia 9.6
- 118TacomaWashington 9.6
- 123Little RockArkansas 9.5
- 123BartlettTennessee 9.5
- 123Missouri CityTexas 9.5
- 123UkiahCalifornia 9.5
- 127YorkPennsylvania 9.4
- 127RenoNevada 9.4
- 127ButteMontana 9.4
- 127RentonWashington 9.4
- 131WyomingMichigan 9.3
- 131La VistaNebraska 9.3
- 131ConcordCalifornia 9.3
- 134BessemerAlabama 9.2
- 134Warner RobinsGeorgia 9.2
- 134TopekaKansas 9.2
- 134McAlesterOklahoma 9.2
- 134PleasantonCalifornia 9.2
- 134Watsonvillelow-cost sensorsCalifornia 9.2
- 134LewistonIdaho 9.2
- 134North OgdenUtah 9.2
- 134YakimaWashington 9.2
- 143Kansas CityKansas 9.1
- 143ChesterPennsylvania 9.1
- 143EdinburgTexas 9.1
- 143Franklin ParkIllinois 9.1
- 143Fort WayneIndiana 9.1
- 143Carson CityNevada 9.1
- 143Spanish SpringsNevada 9.1
- 143HelenaMontana 9.1
- 143Columbia CityWashington 9.1
- 152TallahasseeFlorida 9.0
- 152TulsaOklahoma 9.0
- 152BrookfieldIllinois 9.0
- 152CaryIllinois 9.0
- 152PowayCalifornia 9.0
- 157SavannahGeorgia 8.9
- 157PascagoulaMississippi 8.9
- 157ChattanoogaTennessee 8.9
- 157ClintonIowa 8.9
- 157WaterlooIowa 8.9
- 157NapervilleIllinois 8.9
- 157MinneapolisMinnesota 8.9
- 157PawtucketRhode Island 8.9
- 157WaukeshaWisconsin 8.9
- 157Redwood CityCalifornia 8.9
- 167IndianapolisIndiana 8.8
- 167Oklahoma CityOklahoma 8.8
- 167FlorenceSouth Carolina 8.8
- 167BrownsvilleTexas 8.8
- 167Iowa CityIowa 8.8
- 167BurnsvilleMinnesota 8.8
- 167BethlehemPennsylvania 8.8
- 167NorristownPennsylvania 8.8
- 167FolsomCalifornia 8.8
- 167LincolnCalifornia 8.8
- 167BoiseIdaho 8.8
- 167Grants PassOregon 8.8
- 167AuburnWashington 8.8
- 180West MemphisArkansas 8.7
- 180BrunswickGeorgia 8.7
- 180HagerstownMaryland 8.7
- 180JacksonMississippi 8.7
- 180DanburyConnecticut 8.7
- 180ChicagoIllinois 8.7
- 180ElginIllinois 8.7
- 180BellevueNebraska 8.7
- 180MilwaukeeWisconsin 8.7
- 180MeridianIdaho 8.7
- 180TooeleUtah 8.7
- 191DerbyKansas 8.6
- 191Baton RougeLouisiana 8.6
- 191LafayetteLouisiana 8.6
- 191BaltimoreMaryland 8.6
- 191EdgewoodMaryland 8.6
- 191CharlotteNorth Carolina 8.6
- 191JenksOklahoma 8.6
- 191East ChicagoIndiana 8.6
- 191ElkhartIndiana 8.6
- 191DetroitMichigan 8.6
- 191ParklandWashington 8.6
- 191Candler-McAfeeGeorgia 8.6
- 203WilmingtonDelaware 8.5
- 203Winston-SalemNorth Carolina 8.5
- 203KalamazooMichigan 8.5
- 203LindenNew Jersey 8.5
- 203CantonOhio 8.5
- 203ClevelandOhio 8.5
- 203Santa CruzCalifornia 8.5
- 203Spanish ForkUtah 8.5
- 211KennesawGeorgia 8.4
- 211DecaturIllinois 8.4
- 211New AlbanyIndiana 8.4
- 211Terre HauteIndiana 8.4
- 211FayettevilleNorth Carolina 8.4
- 211HickoryNorth Carolina 8.4
- 211KnoxvilleTennessee 8.4
- 211BaytownTexas 8.4
- 211Saint PaulMinnesota 8.4
- 211BrookingsSouth Dakota 8.4
- 211South MilwaukeeWisconsin 8.4
- 211YumaArizona 8.4
- 211DavisCalifornia 8.4
- 211SalemOregon 8.4
- 225NorwoodOhio 8.3
- 225Calumet CityIllinois 8.3
- 225JolietIllinois 8.3
- 225Bay CityMichigan 8.3
- 225ShakopeeMinnesota 8.3
- 225KenmoreNew York 8.3
- 225SteubenvilleOhio 8.3
- 225MadisonWisconsin 8.3
- 233TrussvilleAlabama 8.2
- 233JacksonvilleFlorida 8.2
- 233GainesvilleGeorgia 8.2
- 233OlatheKansas 8.2
- 233Des PlainesIllinois 8.2
- 233PeoriaIllinois 8.2
- 233HammondIndiana 8.2
- 233South BendIndiana 8.2
- 233DearbornMichigan 8.2
- 233WoodburnOregon 8.2
- 233MidwayFlorida 8.2
- 244SulphurLouisiana 8.1
- 244Hunt ValleyMaryland 8.1
- 244ClemmonsNorth Carolina 8.1
- 244MolineIllinois 8.1
- 244SouthfieldMichigan 8.1
- 244EwingNew Jersey 8.1
- 244Goletalow-cost sensorsCalifornia 8.1
- 244IndioCalifornia 8.1
- 252Granite CityIllinois 8.0
- 252ScaggsvilleMaryland 8.0
- 252MiddletownOhio 8.0
- 252HarrisonburgVirginia 8.0
- 252DavenportIowa 8.0
- 252Grand RapidsMichigan 8.0
- 252Saint MichaelMinnesota 8.0
- 252DublinOhio 8.0
- 252WarrenOhio 8.0
- 252AllentownPennsylvania 8.0
- 252West MifflinPennsylvania 8.0
- 252Live Oaklow-cost sensorsCalifornia 8.0
- 252Spokane ValleyWashington 8.0
- 265GadsdenAlabama 7.9
- 265ValricoFlorida 7.9
- 265AthensGeorgia 7.9
- 265GreensboroNorth Carolina 7.9
- 265EdmondOklahoma 7.9
- 265SpringfieldVirginia 7.9
- 265Michigan CityIndiana 7.9
- 265Lincoln ParkMichigan 7.9
- 265Saint CloudMinnesota 7.9
- 265AkronOhio 7.9
- 265WestervilleOhio 7.9
- 265ScrantonPennsylvania 7.9
- 265State CollegePennsylvania 7.9
- 265BrawleyCalifornia 7.9
- 265GilroyCalifornia 7.9
- 265Prunedalelow-cost sensorsCalifornia 7.9
- 265Santa RosaCalifornia 7.9
- 265EugeneOregon 7.9
- 283OcalaFlorida 7.8
- 283Ponte Vedra BeachFlorida 7.8
- 283GulfportMississippi 7.8
- 283MooreOklahoma 7.8
- 283Mission BendTexas 7.8
- 283AuroraIllinois 7.8
- 283NorthbrookIllinois 7.8
- 283YpsilantiMichigan 7.8
- 283KeeneNew Hampshire 7.8
- 283GahannaOhio 7.8
- 283MedinaOhio 7.8
- 283HerrimanUtah 7.8
- 283SpokaneWashington 7.8
- 283SunnysideWashington 7.8
- 297SpringdaleArkansas 7.7
- 297RaleighNorth Carolina 7.7
- 297PennsaukenNew Jersey 7.7
- 297SewellNew Jersey 7.7
- 297ColumbusOhio 7.7
- 297Ponca CityOklahoma 7.7
- 297Fort WorthTexas 7.7
- 297PortageIndiana 7.7
- 297Apple ValleyMinnesota 7.7
- 297Sunland ParkNew Mexico 7.7
- 297ReddingCalifornia 7.7
- 297PocatelloIdaho 7.7
- 297AnchorageAlaska 7.7
- 310HueytownAlabama 7.6
- 310PrichardAlabama 7.6
- 310ColumbusIndiana 7.6
- 310FishersIndiana 7.6
- 310North CharlestonSouth Carolina 7.6
- 310Cedar RapidsIowa 7.6
- 310RockfordIllinois 7.6
- 310MuncieIndiana 7.6
- 310TaylorMichigan 7.6
- 310BlaineMinnesota 7.6
- 310Shaker HeightsOhio 7.6
- 321Ferry PassFlorida 7.5
- 321Saint JosephMissouri 7.5
- 321St. LouisMissouri 7.5
- 321AustinTexas 7.5
- 321GreenfieldMassachusetts 7.5
- 321JohnstownPennsylvania 7.5
- 321Eau ClaireWisconsin 7.5
- 321Coeur d'AleneIdaho 7.5
- 321Rapid CitySouth Dakota 7.5
- 321WenatcheeWashington 7.5
- 331WashingtonDistrict of Columbia 7.4
- 331East LakeFlorida 7.4
- 331EvansvilleIndiana 7.4
- 331SaginawTexas 7.4
- 331AshburnVirginia 7.4
- 331Rose HillVirginia 7.4
- 331ZionIllinois 7.4
- 331EastpointeMichigan 7.4
- 331NewburghNew York 7.4
- 331YoungstownOhio 7.4
- 331AppletonWisconsin 7.4
- 331WheelingWest Virginia 7.4
- 331El CentroCalifornia 7.4
- 331South Lake TahoeCalifornia 7.4
- 331BozemanMontana 7.4
- 346HuntsvilleAlabama 7.3
- 346Upper AltonIllinois 7.3
- 346KennerLouisiana 7.3
- 346ClaytonNorth Carolina 7.3
- 346San AntonioTexas 7.3
- 346HartfordConnecticut 7.3
- 346BloomingtonIllinois 7.3
- 346BayonneNew Jersey 7.3
- 346LimaOhio 7.3
- 346AltoonaPennsylvania 7.3
- 346PittsburghPennsylvania 7.3
- 346ProvidenceRhode Island 7.3
- 346Seasidelow-cost sensorsCalifornia 7.3
- 346Thousand OaksCalifornia 7.3
- 346HillsboroOregon 7.3
- 361TampaFlorida 7.2
- 361East Saint LouisIllinois 7.2
- 361JeffersonvilleIndiana 7.2
- 361Valley StationKentucky 7.2
- 361Kansas CityMissouri 7.2
- 361DaytonOhio 7.2
- 361PortsmouthOhio 7.2
- 361White OakOhio 7.2
- 361Saint AndrewsSouth Carolina 7.2
- 361Corpus ChristiTexas 7.2
- 361ChesapeakeVirginia 7.2
- 361SpringfieldMassachusetts 7.2
- 361HollandMichigan 7.2
- 361JenisonMichigan 7.2
- 361Fort LeeNew Jersey 7.2
- 361New York CityNew York 7.2
- 361Northglennlow-cost sensorsColorado 7.2
- 361TigardOregon 7.2
- 379West PensacolaFlorida 7.1
- 379BloomingtonIndiana 7.1
- 379NashvilleTennessee 7.1
- 379RichmondVirginia 7.1
- 379WaterburyConnecticut 7.1
- 379UticaNew York 7.1
- 379RutlandVermont 7.1
- 379Green BayWisconsin 7.1
- 379Simi ValleyCalifornia 7.1
- 388HomesteadFlorida 7.0
- 388MiamiFlorida 7.0
- 388University CityMissouri 7.0
- 388MorrisvilleNorth Carolina 7.0
- 388ChampaignIllinois 7.0
- 388FlintMichigan 7.0
- 388LansingMichigan 7.0
- 388PainesvilleOhio 7.0
- 388NipomoCalifornia 7.0
- 388ThorntonColorado 7.0
- 388SeattleWashington 7.0
- 399Bonita SpringsFlorida 6.9
- 399Fort LauderdaleFlorida 6.9
- 399AtlantaGeorgia 6.9
- 399RockvilleMaryland 6.9
- 399CincinnatiOhio 6.9
- 399SpringfieldOhio 6.9
- 399Cleveland HeightsOhio 6.9
- 399RochesterNew York 6.9
- 399WeirtonWest Virginia 6.9
- 399AlbanyOregon 6.9
- 399BendOregon 6.9
- 410DoverDelaware 6.8
- 410Oak RidgeFlorida 6.8
- 410LouisvilleKentucky 6.8
- 410ChalmetteLouisiana 6.8
- 410ElktonMaryland 6.8
- 410Toms RiverNew Jersey 6.8
- 410GalvestonTexas 6.8
- 410East HamptonVirginia 6.8
- 410New HavenConnecticut 6.8
- 410AndersonIndiana 6.8
- 410PatersonNew Jersey 6.8
- 410TrentonNew Jersey 6.8
- 410HolbrookNew York 6.8
- 410HermitagePennsylvania 6.8
- 410HollisterCalifornia 6.8
- 410GreeleyColorado 6.8
- 410LongmontColorado 6.8
- 427BearDelaware 6.7
- 427LemayMissouri 6.7
- 427HernandoMississippi 6.7
- 427OmahaNebraska 6.7
- 427ElizabethNew Jersey 6.7
- 427The DallesOregon 6.7
- 433Daytona BeachFlorida 6.6
- 433Fruit CoveFlorida 6.6
- 433JasperIndiana 6.6
- 433JeffersontownKentucky 6.6
- 433La PorteTexas 6.6
- 433CharlottesvilleVirginia 6.6
- 433AnkenyIowa 6.6
- 433McKeesportPennsylvania 6.6
- 433Inglewood-Finn Hilllow-cost sensorsWashington 6.6
- 442SpringfieldIllinois 6.5
- 442AshlandKentucky 6.5
- 442South VinelandNew Jersey 6.5
- 442College StationTexas 6.5
- 442TexarkanaTexas 6.5
- 442HuntingtonWest Virginia 6.5
- 442Port HuronMichigan 6.5
- 442Jersey CityNew Jersey 6.5
- 442BuffaloNew York 6.5
- 442White PlainsNew York 6.5
- 442WilkinsburgPennsylvania 6.5
- 442LompocCalifornia 6.5
- 442SalinasCalifornia 6.5
- 442MilwaukieOregon 6.5
- 442CentraliaWashington 6.5
- 457FairhopeAlabama 6.4
- 457Fort SmithArkansas 6.4
- 457Lexington-FayetteKentucky 6.4
- 457LawtonOklahoma 6.4
- 457Live OakTexas 6.4
- 457AugustaMaine 6.4
- 457PortlandMaine 6.4
- 457Windsorlow-cost sensorsCalifornia 6.4
- 457HendersonNevada 6.4
- 457BillingsMontana 6.4
- 457EllensburgWashington 6.4
- 457ShorelineWashington 6.4
- 469NewarkDelaware 6.3
- 469Lake MaryFlorida 6.3
- 469OrlandoFlorida 6.3
- 469AshevilleNorth Carolina 6.3
- 469LebanonOhio 6.3
- 469ConwaySouth Carolina 6.3
- 469West FargoNorth Dakota 6.3
- 469EriePennsylvania 6.3
- 469BridgeportConnecticut 6.3
- 469Brightonlow-cost sensorsColorado 6.3
- 479DecaturAlabama 6.2
- 479MontgomeryAlabama 6.2
- 479Deerfield BeachFlorida 6.2
- 479SarasotaFlorida 6.2
- 479ArnoldMissouri 6.2
- 479CorsicanaTexas 6.2
- 479BostonMassachusetts 6.2
- 479New CityNew York 6.2
- 479AberdeenSouth Dakota 6.2
- 479SuperiorWisconsin 6.2
- 479OxnardCalifornia 6.2
- 479OdessaTexas 6.2
- 479Apache JunctionArizona 6.2
- 479Coos BayOregon 6.2
- 493Winter ParkFlorida 6.1
- 493Saint MatthewsKentucky 6.1
- 493South LaurelMaryland 6.1
- 493HopewellVirginia 6.1
- 493CharlestonWest Virginia 6.1
- 493New LondonConnecticut 6.1
- 493MissoulaMontana 6.1
- 493AshlandOregon 6.1
- 493LaceyWashington 6.1
- 502New OrleansLouisiana 6.0
- 502LowellMassachusetts 6.0
- 502North ChicopeeMassachusetts 6.0
- 502BangorMaine 6.0
- 502Weirton HeightsWest Virginia 6.0
- 502Twin FallsIdaho 6.0
- 502PendletonOregon 6.0
- 509WellingtonFlorida 5.9
- 509SpringfieldMissouri 5.9
- 509MaryvilleTennessee 5.9
- 509LaredoTexas 5.9
- 509RoanokeVirginia 5.9
- 509WorcesterMassachusetts 5.9
- 509DuluthMinnesota 5.9
- 509San Luis ObispoCalifornia 5.9
- 509Eagle PassTexas 5.9
- 509BellinghamWashington 5.9
- 509LongviewWashington 5.9
- 509Moses LakeWashington 5.9
- 521Palm CityFlorida 5.8
- 521McDonoughGeorgia 5.8
- 521Fort ThomasKentucky 5.8
- 521Roanoke RapidsNorth Carolina 5.8
- 521MuscatineIowa 5.8
- 521LafayetteIndiana 5.8
- 521Lexingtonlow-cost sensorsMassachusetts 5.8
- 521New BrunswickNew Jersey 5.8
- 521LancasterCalifornia 5.8
- 521McMinnvilleOregon 5.8
- 521Oxon Hill-GlassmanorMaryland 5.8
- 532PaducahKentucky 5.7
- 532DavieFlorida 5.7
- 532ColumbiaTennessee 5.7
- 532HendersonvilleTennessee 5.7
- 532HaverhillMassachusetts 5.7
- 532PittsfieldMassachusetts 5.7
- 532BanningCalifornia 5.7
- 532TemeculaCalifornia 5.7
- 532CanbyOregon 5.7
- 532RedmondOregon 5.7
- 532SheridanWyoming 5.7
- 543Delray BeachFlorida 5.6
- 543RaymoreMissouri 5.6
- 543BeltonTexas 5.6
- 543DentonTexas 5.6
- 543KokomoIndiana 5.6
- 543BrocktonMassachusetts 5.6
- 549Belle GladeFlorida 5.5
- 549Safety HarborFlorida 5.5
- 549MasonOhio 5.5
- 549JacksonTennessee 5.5
- 549Arroyo GrandeCalifornia 5.5
- 549DenverColorado 5.5
- 549Fort CollinsColorado 5.5
- 549DallasOregon 5.5
- 557PortsmouthNew Hampshire 5.4
- 557SyracuseNew York 5.4
- 557BismarckNorth Dakota 5.4
- 557AnacortesWashington 5.4
- 561TaylorTexas 5.3
- 561Des MoinesIowa 5.3
- 561BeavertonOregon 5.3
- 561Picnic Point-North LynnwoodWashington 5.3
- 565Palm BayFlorida 5.2
- 565LibertyMissouri 5.2
- 565DyersburgTennessee 5.2
- 565San MarcosTexas 5.2
- 565CorvallisOregon 5.2
- 565Walla WallaWashington 5.2
- 571Coconut CreekFlorida 5.1
- 571GainesvilleFlorida 5.1
- 571LincolnNebraska 5.1
- 571RoseburgOregon 5.1
- 571HighlandUtah 5.1
- 571VancouverWashington 5.1
- 577ClarksvilleTennessee 5.0
- 577Fall RiverMassachusetts 5.0
- 577QuincyMassachusetts 5.0
- 577HobbsNew Mexico 5.0
- 577Spring ValleyNevada 5.0
- 577Idaho FallsIdaho 5.0
- 577BellevueWashington 5.0
- 584OrcuttCalifornia 4.9
- 584Cedar CityUtah 4.9
- 584Forest GroveOregon 4.9
- 587WestonFlorida 4.8
- 587Lakewoodlow-cost sensorsColorado 4.8
- 587Dodge CityKansas 4.8
- 587PortlandOregon 4.8
- 591CookevilleTennessee 4.7
- 591KingsportTennessee 4.7
- 591LynnMassachusetts 4.7
- 591DerryNew Hampshire 4.7
- 595Las CrucesNew Mexico 4.6
- 595AberdeenWashington 4.6
- 595BremertonWashington 4.6
- 598GreenvilleNorth Carolina 4.5
- 598HurricaneUtah 4.5
- 598Salmon CreekWashington 4.5
- 598RandolphNew Jersey 4.5
- 602Makakilo / Kapolei / Honokai HaleHawaii 4.4
- 603Atlantic CityNew Jersey 4.2
- 603LewistonMaine 4.2
- 603FillmoreCalifornia 4.2
- 603Arvadalow-cost sensorsColorado 4.2
- 603EnterpriseNevada 4.2
- 608TruckeeCalifornia 4.1
- 608KahuluiHawaii 4.1
- 608HonoluluHawaii 4.1
- 611Sioux FallsSouth Dakota 4.0
- 611Green ValleyArizona 4.0
- 613Colorado SpringsColorado 3.9
- 613Rock SpringsWyoming 3.9
- 615PleasantvilleNew Jersey 3.8
- 615MesquiteNevada 3.8
- 615MoscowIdaho 3.8
- 618PuebloColorado 3.7
- 618KīheiHawaii 3.7
- 618Summerlin SouthNevada 3.7
- 621LubbockTexas 3.6
- 621GreshamOregon 3.6
- 623LittletonColorado 3.4
- 624GilletteWyoming 3.3
- 625Boulder CityNevada 3.2
- 626CoventryRhode Island 3.1
- 626BoulderColorado 3.1
- 628MarquetteMichigan 3.0
- 629HiloHawaii 2.9
- 630PullmanWashington 2.8
- 631Tri-CitiesWashington 2.7
- 632CheyenneWyoming 2.5
- 633RidgecrestCalifornia 2.3
- 634Oak HarborWashington 2.2
- 635Ken CarylColorado 2.0
- 636CasperWyoming 1.9
- 637LaramieWyoming 1.8
- 638MarysvilleWashington 1.3
- 638Mount VernonWashington 1.3
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+