SmogRank / Countries / United States / August 2023
Most polluted cities in United States, August 2023
587 cities in United States ranked by their average PM2.5 over the 31 days. Worst: Medford at 47.2 µg/m³, #7 of 1,670 cities in the world. Cleanest: Apache Junction at 3.0. A city needs measurements on 70% of the days to be ranked.
- 1MedfordOregon 47.2
- 2RedmondOregon 46.6
- 3AshlandOregon 45.6
- 4Grants PassOregon 44.5
- 5BendOregon 39.6
- 6RoseburgOregon 30.0
- 7SpokaneWashington 27.5
- 8Moses LakeWashington 26.4
- 9BadgerAlaska 25.2
- 10Spokane ValleyWashington 25.0
- 11Walla WallaWashington 24.9
- 12HermistonOregon 23.6
- 13FairbanksAlaska 23.3
- 14Tri-CitiesWashington 22.8
- 15SunnysideWashington 22.2
- 16AltamontOregon 21.8
- 17PendletonOregon 20.3
- 18Coeur d'AleneIdaho 19.7
- 19The DallesOregon 19.2
- 20YakimaWashington 18.8
- 21WenatcheeWashington 18.6
- 22LewistonIdaho 18.0
- 23EllensburgWashington 17.9
- 23PascoWashington 17.9
- 25BismarckNorth Dakota 16.8
- 26HollandMichigan 16.6
- 27Great FallsMontana 16.2
- 28BirminghamAlabama 16.1
- 29PullmanWashington 15.8
- 30CalexicoCalifornia 15.3
- 31ShreveportLouisiana 15.2
- 32Little RockArkansas 14.8
- 33MoscowIdaho 14.7
- 34BurnsvilleMinnesota 14.6
- 34West FargoNorth Dakota 14.6
- 36Saint CloudMinnesota 14.4
- 36EugeneOregon 14.4
- 38ShakopeeMinnesota 14.3
- 39Franklin ParkIllinois 14.1
- 40JolietIllinois 13.9
- 41Calumet CityIllinois 13.8
- 41KalamazooMichigan 13.8
- 41MinneapolisMinnesota 13.8
- 44RochesterMinnesota 13.5
- 45IndianapolisIndiana 13.4
- 45Saint MichaelMinnesota 13.4
- 47SpringdaleArkansas 13.3
- 47Saint PaulMinnesota 13.3
- 49SulphurLouisiana 13.2
- 49HattiesburgMississippi 13.2
- 49TexarkanaTexas 13.2
- 52NorwoodOhio 13.0
- 52DallasTexas 13.0
- 54New OrleansLouisiana 12.9
- 54MiddletownOhio 12.9
- 54PeoriaIllinois 12.9
- 54Grand RapidsMichigan 12.9
- 54Apple ValleyMinnesota 12.9
- 59BaytownTexas 12.8
- 59East ChicagoIndiana 12.8
- 61Ferry PassFlorida 12.7
- 61ClintonIowa 12.7
- 61NorthbrookIllinois 12.7
- 61South BendIndiana 12.7
- 61ClevelandOhio 12.7
- 61West MifflinPennsylvania 12.7
- 67HernandoMississippi 12.6
- 67DetroitMichigan 12.6
- 67CantonOhio 12.6
- 67WatertownSouth Dakota 12.6
- 71BensalemPennsylvania 12.5
- 71UkiahCalifornia 12.5
- 73JacksonMississippi 12.4
- 73MooreOklahoma 12.4
- 73Port ArthurTexas 12.4
- 73Des PlainesIllinois 12.4
- 73NapervilleIllinois 12.4
- 73RockfordIllinois 12.4
- 79CincinnatiOhio 12.3
- 79TulsaOklahoma 12.3
- 79PortageIndiana 12.3
- 79WestervilleOhio 12.3
- 79ReddingCalifornia 12.3
- 84East Saint LouisIllinois 12.2
- 84Fort WorthTexas 12.2
- 84HoustonTexas 12.2
- 84MolineIllinois 12.2
- 84GaryIndiana 12.2
- 84DearbornMichigan 12.2
- 84AuburnWashington 12.2
- 91HueytownAlabama 12.1
- 91Fort LauderdaleFlorida 12.1
- 91SpringfieldOhio 12.1
- 91JenisonMichigan 12.1
- 91DuluthMinnesota 12.1
- 91WarrenOhio 12.1
- 91AnaheimCalifornia 12.1
- 91ComptonCalifornia 12.1
- 91FontanaCalifornia 12.1
- 91Los AngelesCalifornia 12.1
- 91HelenaMontana 12.1
- 91IssaquahWashington 12.1
- 103MontgomeryAlabama 12.0
- 103DerbyKansas 12.0
- 103DaytonOhio 12.0
- 103Lincoln ParkMichigan 12.0
- 103TurlockCalifornia 12.0
- 103Columbia CityWashington 12.0
- 103MidwayFlorida 12.0
- 110SpringfieldIllinois 11.9
- 110JeffersonvilleIndiana 11.9
- 110JeffersontownKentucky 11.9
- 110Baton RougeLouisiana 11.9
- 110DavenportIowa 11.9
- 110MaderaCalifornia 11.9
- 116EdmondOklahoma 11.8
- 116SaginawTexas 11.8
- 116AnkenyIowa 11.8
- 116Iowa CityIowa 11.8
- 116Eau ClaireWisconsin 11.8
- 116Yuba CityCalifornia 11.8
- 122WichitaKansas 11.7
- 122LouisvilleKentucky 11.7
- 122Oklahoma CityOklahoma 11.7
- 122CaryIllinois 11.7
- 122BakersfieldCalifornia 11.7
- 127DecaturIllinois 11.6
- 127RaleighNorth Carolina 11.6
- 127GalvestonTexas 11.6
- 130GadsdenAlabama 11.5
- 130PrichardAlabama 11.5
- 130LibertyMissouri 11.5
- 130Ponca CityOklahoma 11.5
- 130BloomingtonIllinois 11.5
- 130YoungstownOhio 11.5
- 130SuperiorWisconsin 11.5
- 130RichmondCalifornia 11.5
- 130RiversideCalifornia 11.5
- 139FishersIndiana 11.4
- 139ToledoOhio 11.4
- 139BrookingsSouth Dakota 11.4
- 139MadisonWisconsin 11.4
- 139Candler-McAfeeGeorgia 11.4
- 144Fort ThomasKentucky 11.3
- 144JenksOklahoma 11.3
- 144Missouri CityTexas 11.3
- 144YpsilantiMichigan 11.3
- 144WilkinsburgPennsylvania 11.3
- 144WaukeshaWisconsin 11.3
- 150Saint MatthewsKentucky 11.2
- 150PascagoulaMississippi 11.2
- 150CorsicanaTexas 11.2
- 150DentonTexas 11.2
- 150PasadenaTexas 11.2
- 150MilwaukeeWisconsin 11.2
- 150Chula VistaCalifornia 11.2
- 157MaconGeorgia 11.1
- 157Valley StationKentucky 11.1
- 157FlorenceSouth Carolina 11.1
- 157BurbankCalifornia 11.1
- 157IndioCalifornia 11.1
- 157ModestoCalifornia 11.1
- 157VisaliaCalifornia 11.1
- 157RentonWashington 11.1
- 165AtlantaGeorgia 11.0
- 165AndersonIndiana 11.0
- 165HammondIndiana 11.0
- 165ElizabethNew Jersey 11.0
- 165AppletonWisconsin 11.0
- 165FresnoCalifornia 11.0
- 165Jurupa ValleyCalifornia 11.0
- 172FairhopeAlabama 10.9
- 172McAlesterOklahoma 10.9
- 172East RidgeTennessee 10.9
- 172AkronOhio 10.9
- 172SeattleWashington 10.9
- 177AlbanyGeorgia 10.8
- 177Terre HauteIndiana 10.8
- 177OlatheKansas 10.8
- 177AustinTexas 10.8
- 177ElkhartIndiana 10.8
- 177LansingMichigan 10.8
- 177MedinaOhio 10.8
- 177PittsburghPennsylvania 10.8
- 177PortervilleCalifornia 10.8
- 177Rapid CitySouth Dakota 10.8
- 187ColumbusGeorgia 10.7
- 187Granite CityIllinois 10.7
- 187JasperIndiana 10.7
- 187Saint JosephMissouri 10.7
- 187St. LouisMissouri 10.7
- 187Winston-SalemNorth Carolina 10.7
- 187TaylorMichigan 10.7
- 187HanfordCalifornia 10.7
- 195TrussvilleAlabama 10.6
- 195GainesvilleGeorgia 10.6
- 195ValdostaGeorgia 10.6
- 195ColumbusIndiana 10.6
- 195EvansvilleIndiana 10.6
- 195University CityMissouri 10.6
- 195GulfportMississippi 10.6
- 195MorrisvilleNorth Carolina 10.6
- 195SpartanburgSouth Carolina 10.6
- 195ChattanoogaTennessee 10.6
- 195MuscatineIowa 10.6
- 195Port HuronMichigan 10.6
- 195DublinOhio 10.6
- 195BrawleyCalifornia 10.6
- 195Inglewoodlow-cost sensorsCalifornia 10.6
- 195StocktonCalifornia 10.6
- 211Kansas CityKansas 10.5
- 211TopekaKansas 10.5
- 211Saint AndrewsSouth Carolina 10.5
- 211ConroeTexas 10.5
- 211Shaker HeightsOhio 10.5
- 211SteubenvilleOhio 10.5
- 211La CrosseWisconsin 10.5
- 218McDonoughGeorgia 10.4
- 218Warner RobinsGeorgia 10.4
- 218FayettevilleNorth Carolina 10.4
- 218GreensboroNorth Carolina 10.4
- 218PortsmouthOhio 10.4
- 218LawtonOklahoma 10.4
- 218PhiladelphiaPennsylvania 10.4
- 218LaredoTexas 10.4
- 218WaterlooIowa 10.4
- 227NewarkDelaware 10.3
- 227White OakOhio 10.3
- 227EdinburgTexas 10.3
- 227ChicagoIllinois 10.3
- 227McKeesportPennsylvania 10.3
- 227Green BayWisconsin 10.3
- 227Hawthornelow-cost sensorsCalifornia 10.3
- 227Long BeachCalifornia 10.3
- 227SalinasCalifornia 10.3
- 227Santa BarbaraCalifornia 10.3
- 227TigardOregon 10.3
- 238New AlbanyIndiana 10.2
- 238Corpus ChristiTexas 10.2
- 238TrentonNew Jersey 10.2
- 238Carsonlow-cost sensorsCalifornia 10.2
- 238San DiegoCalifornia 10.2
- 238Santa Monicalow-cost sensorsCalifornia 10.2
- 244Phenix CityAlabama 10.1
- 244La PorteTexas 10.1
- 244San AntonioTexas 10.1
- 244BlaineMinnesota 10.1
- 244South MilwaukeeWisconsin 10.1
- 244ShorelineWashington 10.1
- 244TacomaWashington 10.1
- 251ElizabethtownKentucky 10.0
- 251AdaOklahoma 10.0
- 251North CharlestonSouth Carolina 10.0
- 251Live OakTexas 10.0
- 251Rose HillVirginia 10.0
- 256AshlandKentucky 9.9
- 256Roanoke RapidsNorth Carolina 9.9
- 256Des MoinesIowa 9.9
- 256HarrisburgPennsylvania 9.9
- 256JohnstownPennsylvania 9.9
- 256GlendoraCalifornia 9.9
- 256OceansideCalifornia 9.9
- 256Torrancelow-cost sensorsCalifornia 9.9
- 256Eagle PassTexas 9.9
- 265BearDelaware 9.8
- 265ClemmonsNorth Carolina 9.8
- 265GreenvilleNorth Carolina 9.8
- 265Oak LawnIllinois 9.8
- 265ChicoCalifornia 9.8
- 265MercedCalifornia 9.8
- 271PaducahKentucky 9.7
- 271Lexington-FayetteKentucky 9.7
- 271PleasantvilleNew Jersey 9.7
- 271BeltonTexas 9.7
- 271OdessaTexas 9.7
- 276WashingtonDistrict of Columbia 9.6
- 276WilmingtonDelaware 9.6
- 276East LakeFlorida 9.6
- 276MiamiFlorida 9.6
- 276JacksonTennessee 9.6
- 276KnoxvilleTennessee 9.6
- 276EriePennsylvania 9.6
- 276ClovisCalifornia 9.6
- 284CharlotteNorth Carolina 9.5
- 284ZionIllinois 9.5
- 284Lomitalow-cost sensorsCalifornia 9.5
- 284AlbanyOregon 9.5
- 284Spanish ForkUtah 9.5
- 284ParklandWashington 9.5
- 290HuntsvilleAlabama 9.4
- 290HomesteadFlorida 9.4
- 290Ponte Vedra BeachFlorida 9.4
- 290KokomoIndiana 9.4
- 290LafayetteIndiana 9.4
- 290New BrunswickNew Jersey 9.4
- 290AberdeenSouth Dakota 9.4
- 290San JoseCalifornia 9.4
- 298Bonita SpringsFlorida 9.3
- 298Daytona BeachFlorida 9.3
- 298BloomingtonIndiana 9.3
- 298LancasterPennsylvania 9.3
- 298OaklandCalifornia 9.3
- 298MissoulaMontana 9.3
- 304AthensGeorgia 9.2
- 304GreenvilleSouth Carolina 9.2
- 304Lexingtonlow-cost sensorsMassachusetts 9.2
- 304CheektowagaNew York 9.2
- 304Weirton HeightsWest Virginia 9.2
- 304MantecaCalifornia 9.2
- 310West MemphisArkansas 9.1
- 310VeniceFlorida 9.1
- 310ArnoldMissouri 9.1
- 310ClaytonNorth Carolina 9.1
- 310PennsaukenNew Jersey 9.1
- 310CorcoranCalifornia 9.1
- 310Santa ClaritaCalifornia 9.1
- 317SpringfieldMissouri 9.0
- 317ChesterPennsylvania 9.0
- 317CharlottesvilleVirginia 9.0
- 317RichmondVirginia 9.0
- 317Bay CityMichigan 9.0
- 317El CajonCalifornia 9.0
- 317PowayCalifornia 9.0
- 317Redwood CityCalifornia 9.0
- 317NampaIdaho 9.0
- 326AugustaGeorgia 8.9
- 326Kansas CityMissouri 8.9
- 326DyersburgTennessee 8.9
- 326EwingNew Jersey 8.9
- 326LebanonPennsylvania 8.9
- 326WheelingWest Virginia 8.9
- 326WoodlandCalifornia 8.9
- 326CanbyOregon 8.9
- 326Salmon CreekWashington 8.9
- 335DoverDelaware 8.8
- 335LawrencevilleGeorgia 8.8
- 335ElktonMaryland 8.8
- 335ConwaySouth Carolina 8.8
- 335East HamptonVirginia 8.8
- 335RedfordMichigan 8.8
- 335Grand IslandNebraska 8.8
- 335KenmoreNew York 8.8
- 335RochesterNew York 8.8
- 335HermitagePennsylvania 8.8
- 335RosevilleCalifornia 8.8
- 335MeridianIdaho 8.8
- 347SavannahGeorgia 8.7
- 347Toms RiverNew Jersey 8.7
- 347YorkPennsylvania 8.7
- 347LindenNew Jersey 8.7
- 347LimaOhio 8.7
- 347MillcreekUtah 8.7
- 353Fort SmithArkansas 8.6
- 353Coconut CreekFlorida 8.6
- 353Delray BeachFlorida 8.6
- 353ChesapeakeVirginia 8.6
- 353AltoonaPennsylvania 8.6
- 353LincolnCalifornia 8.6
- 353ParadiseCalifornia 8.6
- 353La Crescenta-Montroselow-cost sensorsCalifornia 8.6
- 361Palm CityFlorida 8.5
- 361BethlehemPennsylvania 8.5
- 361SacramentoCalifornia 8.5
- 361ButteMontana 8.5
- 361SalemOregon 8.5
- 366DavieFlorida 8.4
- 366Deerfield BeachFlorida 8.4
- 366LakelandFlorida 8.4
- 366TampaFlorida 8.4
- 366College StationTexas 8.4
- 366SpringfieldVirginia 8.4
- 366AlbanyNew York 8.4
- 366New York CityNew York 8.4
- 366NorristownPennsylvania 8.4
- 366GaltCalifornia 8.4
- 376Winter ParkFlorida 8.3
- 376LemayMissouri 8.3
- 376PortlandMaine 8.3
- 376OmahaNebraska 8.3
- 376ScrantonPennsylvania 8.3
- 381OcalaFlorida 8.2
- 381South LaurelMaryland 8.2
- 381HickoryNorth Carolina 8.2
- 381CookevilleTennessee 8.2
- 381RoanokeVirginia 8.2
- 381Arroyo GrandeCalifornia 8.2
- 381El CentroCalifornia 8.2
- 381BellevueWashington 8.2
- 381GilletteWyoming 8.2
- 390BrunswickGeorgia 8.1
- 390EdgewoodMaryland 8.1
- 390South VinelandNew Jersey 8.1
- 390State CollegePennsylvania 8.1
- 390Agouralow-cost sensorsCalifornia 8.1
- 390ConcordCalifornia 8.1
- 390LivermoreCalifornia 8.1
- 390HillsboroOregon 8.1
- 390BremertonWashington 8.1
- 399LexingtonNorth Carolina 8.0
- 399CharlestonWest Virginia 8.0
- 399Thousand OaksCalifornia 8.0
- 399VictorvilleCalifornia 8.0
- 403MaryvilleTennessee 7.9
- 403WaterburyConnecticut 7.9
- 403LincolnNebraska 7.9
- 403Jersey CityNew Jersey 7.9
- 403GahannaOhio 7.9
- 403CarlislePennsylvania 7.9
- 403DavisCalifornia 7.9
- 403BeavertonOregon 7.9
- 403PortlandOregon 7.9
- 403BellinghamWashington 7.9
- 413Lake MaryFlorida 7.8
- 413WellingtonFlorida 7.8
- 413ClarksvilleTennessee 7.8
- 413ColumbiaTennessee 7.8
- 413KingsportTennessee 7.8
- 413AllentownPennsylvania 7.8
- 413AmarilloTexas 7.8
- 413El PasoTexas 7.8
- 413Port AngelesWashington 7.8
- 422Palm BayFlorida 7.7
- 422BuffaloNew York 7.7
- 422Sioux FallsSouth Dakota 7.7
- 422FillmoreCalifornia 7.7
- 422TracyCalifornia 7.7
- 422RexburgIdaho 7.7
- 422CentraliaWashington 7.7
- 429GainesvilleFlorida 7.6
- 429JacksonvilleFlorida 7.6
- 429HopewellVirginia 7.6
- 429HartfordConnecticut 7.6
- 429AugustaMaine 7.6
- 429BellevueNebraska 7.6
- 429Lake ElsinoreCalifornia 7.6
- 429GreshamOregon 7.6
- 437DecaturAlabama 7.5
- 437ScaggsvilleMaryland 7.5
- 437RaymoreMissouri 7.5
- 437DanburyConnecticut 7.5
- 437New LondonConnecticut 7.5
- 437PatersonNew Jersey 7.5
- 437ReadingPennsylvania 7.5
- 437Forest GroveOregon 7.5
- 437LongviewWashington 7.5
- 446Belle GladeFlorida 7.4
- 446Fruit CoveFlorida 7.4
- 446Safety HarborFlorida 7.4
- 446HendersonvilleTennessee 7.4
- 446SyracuseNew York 7.4
- 446PawtucketRhode Island 7.4
- 446BridgeportConnecticut 7.4
- 446West JordanUtah 7.4
- 454WestonFlorida 7.3
- 454NipomoCalifornia 7.3
- 456BanningCalifornia 7.2
- 456Simi ValleyCalifornia 7.2
- 456Colorado SpringsColorado 7.2
- 456SocorroTexas 7.2
- 456GreeleyColorado 7.2
- 456CorvallisOregon 7.2
- 456HerrimanUtah 7.2
- 463DurhamNorth Carolina 7.1
- 463New HavenConnecticut 7.1
- 463BostonMassachusetts 7.1
- 463RutlandVermont 7.1
- 463San LeandroCalifornia 7.1
- 463OrchardsWashington 7.1
- 469LubbockTexas 7.0
- 470ValricoFlorida 6.9
- 470SpringfieldMassachusetts 6.9
- 470PainesvilleOhio 6.9
- 470DenverColorado 6.9
- 470ThorntonColorado 6.9
- 470VancouverWashington 6.9
- 476Hunt ValleyMaryland 6.8
- 476GreenfieldMassachusetts 6.8
- 476PortsmouthNew Hampshire 6.8
- 476Casa GrandeArizona 6.8
- 476BozemanMontana 6.8
- 476Salt Lake CityUtah 6.8
- 482BaltimoreMaryland 6.7
- 482HagerstownMaryland 6.7
- 482WorcesterMassachusetts 6.7
- 482KeeneNew Hampshire 6.7
- 482San RafaelCalifornia 6.7
- 482BountifulUtah 6.7
- 482HighlandUtah 6.7
- 489BrocktonMassachusetts 6.6
- 489ProvidenceRhode Island 6.6
- 489WoodburnOregon 6.6
- 489MagnaUtah 6.6
- 493LowellMassachusetts 6.5
- 493PittsfieldMassachusetts 6.5
- 493Fort LeeNew Jersey 6.5
- 493FolsomCalifornia 6.5
- 493Santa CruzCalifornia 6.5
- 493HobbsNew Mexico 6.5
- 493OremUtah 6.5
- 500AshevilleNorth Carolina 6.4
- 500Fall RiverMassachusetts 6.4
- 500North ChicopeeMassachusetts 6.4
- 500QuincyMassachusetts 6.4
- 500DerryNew Hampshire 6.4
- 500LompocCalifornia 6.4
- 500BillingsMontana 6.4
- 500Arden-ArcadeCalifornia 6.4
- 508VacavilleCalifornia 6.3
- 508Fort CollinsColorado 6.3
- 508BoiseIdaho 6.3
- 508AberdeenWashington 6.3
- 512LafayetteLouisiana 6.2
- 512TruckeeCalifornia 6.2
- 512RenoNevada 6.2
- 512McMinnvilleOregon 6.2
- 512MilwaukieOregon 6.2
- 512Mount VernonWashington 6.2
- 512SheridanWyoming 6.2
- 519HaverhillMassachusetts 6.1
- 519LynnMassachusetts 6.1
- 519HollisterCalifornia 6.1
- 519Santa RosaCalifornia 6.1
- 519LongmontColorado 6.1
- 519TooeleUtah 6.1
- 525LewistonMaine 6.0
- 525NewburghNew York 6.0
- 525San Luis ObispoCalifornia 6.0
- 525Sunland ParkNew Mexico 6.0
- 525DallasOregon 6.0
- 525LaceyWashington 6.0
- 531FlintMichigan 5.9
- 532BangorMaine 5.8
- 532LaconiaNew Hampshire 5.8
- 532HempsteadNew York 5.8
- 532PhoenixArizona 5.8
- 532CondaIdaho 5.8
- 532Idaho FallsIdaho 5.8
- 532CheyenneWyoming 5.8
- 539Spanish SpringsNevada 5.7
- 540CoventryRhode Island 5.6
- 540MesaArizona 5.6
- 540TempeArizona 5.6
- 540Ken CarylColorado 5.6
- 540AnacortesWashington 5.6
- 545UticaNew York 5.5
- 545NogalesArizona 5.5
- 545Carson CityNevada 5.5
- 545Makakilo / Kapolei / Honokai HaleHawaii 5.5
- 549RockvilleMaryland 5.4
- 549Cedar CityUtah 5.4
- 551New CityNew York 5.3
- 551North OgdenUtah 5.3
- 553PocatelloIdaho 5.2
- 553Twin FallsIdaho 5.2
- 553Rock SpringsWyoming 5.2
- 553HonoluluHawaii 5.2
- 557White PlainsNew York 5.1
- 557GlendaleArizona 5.1
- 559GilroyCalifornia 5.0
- 559Las CrucesNew Mexico 5.0
- 559Rio RanchoNew Mexico 5.0
- 562AlbuquerqueNew Mexico 4.9
- 562Coos BayOregon 4.9
- 562CasperWyoming 4.9
- 565TucsonArizona 4.6
- 565Las VegasNevada 4.6
- 565MarysvilleWashington 4.6
- 568OrcuttCalifornia 4.5
- 569MaranaArizona 4.4
- 569LancasterCalifornia 4.4
- 571Casas AdobesArizona 4.3
- 572HiloHawaii 4.0
- 573HurricaneUtah 3.9
- 574Spring ValleyNevada 3.8
- 574Oak HarborWashington 3.8
- 574LaramieWyoming 3.8
- 577AtascaderoCalifornia 3.7
- 577KahuluiHawaii 3.7
- 579EnterpriseNevada 3.6
- 579HendersonNevada 3.6
- 579Summerlin SouthNevada 3.6
- 582Grand JunctionColorado 3.5
- 583Green ValleyArizona 3.4
- 583MesquiteNevada 3.4
- 583AnchorageAlaska 3.4
- 586Boulder CityNevada 3.3
- 587Apache JunctionArizona 3.0
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+