SmogRank / Countries / United States / December 2023
Most polluted cities in United States, December 2023
583 cities in United States ranked by their average PM2.5 over the 31 days. Worst: Bakersfield at 25.5 µg/m³, #80 of 1,889 cities in the world. Cleanest: Marysville at 1.0. A city needs measurements on 70% of the days to be ranked.
- 1BakersfieldCalifornia 25.5
- 2HanfordCalifornia 24.9
- 3FresnoCalifornia 23.9
- 4VisaliaCalifornia 21.5
- 4BadgerAlaska 21.5
- 6StocktonCalifornia 20.8
- 7PhoenixArizona 19.3
- 8ModestoCalifornia 19.2
- 9NogalesArizona 19.0
- 10TurlockCalifornia 18.8
- 11ComptonCalifornia 17.8
- 12MercedCalifornia 17.4
- 13CorcoranCalifornia 17.0
- 14MillcreekUtah 16.9
- 15ClovisCalifornia 16.6
- 16MaderaCalifornia 16.2
- 17BensalemPennsylvania 15.9
- 18Jurupa ValleyCalifornia 15.7
- 19MantecaCalifornia 15.6
- 20Hawthornelow-cost sensorsCalifornia 15.4
- 21Arden-ArcadeCalifornia 15.2
- 22West JordanUtah 14.8
- 23AnaheimCalifornia 14.7
- 24Las VegasNevada 14.4
- 25PortervilleCalifornia 14.3
- 26ButteMontana 13.9
- 26Salt Lake CityUtah 13.9
- 28Carsonlow-cost sensorsCalifornia 13.8
- 29Los AngelesCalifornia 13.0
- 29RiversideCalifornia 13.0
- 31GlendaleArizona 12.9
- 32SulphurLouisiana 12.8
- 32East RidgeTennessee 12.8
- 32DearbornMichigan 12.8
- 35HarrisburgPennsylvania 12.7
- 35Yuba CityCalifornia 12.7
- 37KennesawGeorgia 12.6
- 37FontanaCalifornia 12.6
- 37MedfordOregon 12.6
- 37FairbanksAlaska 12.6
- 41BurbankCalifornia 12.5
- 41San DiegoCalifornia 12.5
- 43ChicoCalifornia 12.4
- 43MagnaUtah 12.4
- 45LebanonPennsylvania 12.2
- 45Torrancelow-cost sensorsCalifornia 12.2
- 45AltamontOregon 12.2
- 48Grand RapidsMichigan 12.1
- 48ElizabethNew Jersey 12.1
- 48Long BeachCalifornia 12.1
- 51SacramentoCalifornia 12.0
- 52DetroitMichigan 11.7
- 52LancasterPennsylvania 11.7
- 52Inglewoodlow-cost sensorsCalifornia 11.7
- 52Redwood CityCalifornia 11.7
- 56El CajonCalifornia 11.6
- 56San JoseCalifornia 11.6
- 58BirminghamAlabama 11.5
- 58Chula VistaCalifornia 11.5
- 60CarlislePennsylvania 11.4
- 61ToledoOhio 11.3
- 62SpartanburgSouth Carolina 11.2
- 62HoustonTexas 11.2
- 62BountifulUtah 11.2
- 65RedfordMichigan 11.1
- 65LindenNew Jersey 11.1
- 65ReadingPennsylvania 11.1
- 65TempeArizona 11.1
- 65HelenaMontana 11.1
- 70PhiladelphiaPennsylvania 11.0
- 70RichmondCalifornia 11.0
- 72YorkPennsylvania 10.9
- 73Lincoln ParkMichigan 10.8
- 73MesaArizona 10.8
- 73ReddingCalifornia 10.8
- 76IndianapolisIndiana 10.7
- 77MiddletownOhio 10.6
- 78AugustaGeorgia 10.5
- 79ClevelandOhio 10.4
- 79OaklandCalifornia 10.4
- 79WoodlandCalifornia 10.4
- 79Rio RanchoNew Mexico 10.4
- 83ColumbusOhio 10.3
- 83HollandMichigan 10.3
- 83ShakopeeMinnesota 10.3
- 86Granite CityIllinois 10.2
- 86LafayetteLouisiana 10.2
- 86NorwoodOhio 10.2
- 86BurnsvilleMinnesota 10.2
- 86MinneapolisMinnesota 10.2
- 91ColumbusGeorgia 10.1
- 91ConroeTexas 10.1
- 91San AntonioTexas 10.1
- 91Lomitalow-cost sensorsCalifornia 10.1
- 91Grants PassOregon 10.1
- 91TooeleUtah 10.1
- 97TrussvilleAlabama 10.0
- 97HattiesburgMississippi 10.0
- 97PascagoulaMississippi 10.0
- 97GreensboroNorth Carolina 10.0
- 97PatersonNew Jersey 10.0
- 97BethlehemPennsylvania 10.0
- 97VictorvilleCalifornia 10.0
- 97RoseburgOregon 10.0
- 105ChattanoogaTennessee 9.9
- 105BaytownTexas 9.9
- 105PasadenaTexas 9.9
- 105KalamazooMichigan 9.9
- 105TrentonNew Jersey 9.9
- 105El PasoTexas 9.9
- 105OremUtah 9.9
- 112ChesterPennsylvania 9.8
- 112GreenfieldMassachusetts 9.8
- 112BanningCalifornia 9.8
- 112RosevilleCalifornia 9.8
- 116Terre HauteIndiana 9.7
- 116ClemmonsNorth Carolina 9.7
- 116LexingtonNorth Carolina 9.7
- 116Oak LawnIllinois 9.7
- 116Saint PaulMinnesota 9.7
- 121HickoryNorth Carolina 9.6
- 121GreenvilleSouth Carolina 9.6
- 121Fort LeeNew Jersey 9.6
- 121NorristownPennsylvania 9.6
- 121TucsonArizona 9.6
- 121LivermoreCalifornia 9.6
- 121Santa Monicalow-cost sensorsCalifornia 9.6
- 128JacksonMississippi 9.5
- 128DanburyConnecticut 9.5
- 128ClintonIowa 9.5
- 128WaterlooIowa 9.5
- 128East ChicagoIndiana 9.5
- 128BlaineMinnesota 9.5
- 128DublinOhio 9.5
- 128AllentownPennsylvania 9.5
- 128RenoNevada 9.5
- 137GadsdenAlabama 9.4
- 137Missouri CityTexas 9.4
- 137New York CityNew York 9.4
- 137OceansideCalifornia 9.4
- 141JeffersonvilleIndiana 9.3
- 141Iowa CityIowa 9.3
- 143Valley StationKentucky 9.2
- 143PennsaukenNew Jersey 9.2
- 143AshburnVirginia 9.2
- 143Fort WayneIndiana 9.2
- 143EwingNew Jersey 9.2
- 143AlbanyNew York 9.2
- 143AppletonWisconsin 9.2
- 143Green BayWisconsin 9.2
- 143UkiahCalifornia 9.2
- 152Winston-SalemNorth Carolina 9.1
- 152CincinnatiOhio 9.1
- 152WestervilleOhio 9.1
- 152State CollegePennsylvania 9.1
- 152PleasantonCalifornia 9.1
- 152NampaIdaho 9.1
- 158WilmingtonDelaware 9.0
- 158GulfportMississippi 9.0
- 158HarrisonburgVirginia 9.0
- 158YpsilantiMichigan 9.0
- 158Saint MichaelMinnesota 9.0
- 158KenmoreNew York 9.0
- 158ScrantonPennsylvania 9.0
- 158West MifflinPennsylvania 9.0
- 158Carson CityNevada 9.0
- 167GainesvilleGeorgia 8.9
- 167ValdostaGeorgia 8.9
- 167ShreveportLouisiana 8.9
- 167CharlotteNorth Carolina 8.9
- 167DaytonOhio 8.9
- 167ChicagoIllinois 8.9
- 167Port HuronMichigan 8.9
- 167KeeneNew Hampshire 8.9
- 167CantonOhio 8.9
- 167MedinaOhio 8.9
- 167MilwaukeeWisconsin 8.9
- 167BrawleyCalifornia 8.9
- 167LincolnCalifornia 8.9
- 167BoiseIdaho 8.9
- 181HueytownAlabama 8.8
- 181RaleighNorth Carolina 8.8
- 181South BendIndiana 8.8
- 181JenisonMichigan 8.8
- 181Apple ValleyMinnesota 8.8
- 181Casa GrandeArizona 8.8
- 181Columbia CityWashington 8.8
- 188EvansvilleIndiana 8.7
- 188LouisvilleKentucky 8.7
- 188SpringfieldOhio 8.7
- 188WaterburyConnecticut 8.7
- 188Bay CityMichigan 8.7
- 188AkronOhio 8.7
- 188Spanish ForkUtah 8.7
- 195BartlettTennessee 8.6
- 195KnoxvilleTennessee 8.6
- 195NashvilleTennessee 8.6
- 195Franklin ParkIllinois 8.6
- 195AugustaMaine 8.6
- 195TaylorMichigan 8.6
- 195Eau ClaireWisconsin 8.6
- 195AlbuquerqueNew Mexico 8.6
- 195RentonWashington 8.6
- 204OcalaFlorida 8.5
- 204New HavenConnecticut 8.5
- 204DavenportIowa 8.5
- 204Calumet CityIllinois 8.5
- 204RochesterMinnesota 8.5
- 204Saint CloudMinnesota 8.5
- 204JohnstownPennsylvania 8.5
- 204PittsburghPennsylvania 8.5
- 204WaukeshaWisconsin 8.5
- 204Casas AdobesArizona 8.5
- 204North OgdenUtah 8.5
- 204YakimaWashington 8.5
- 216East Saint LouisIllinois 8.4
- 216JasperIndiana 8.4
- 216Rose HillVirginia 8.4
- 216SpringfieldVirginia 8.4
- 216HartfordConnecticut 8.4
- 216Jersey CityNew Jersey 8.4
- 216NewburghNew York 8.4
- 216Agouralow-cost sensorsCalifornia 8.4
- 216El CentroCalifornia 8.4
- 216FolsomCalifornia 8.4
- 216San FranciscoCalifornia 8.4
- 216TracyCalifornia 8.4
- 216Port AngelesWashington 8.4
- 229AlbanyGeorgia 8.3
- 229TexarkanaTexas 8.3
- 229NapervilleIllinois 8.3
- 229GaltCalifornia 8.3
- 229MissoulaMontana 8.3
- 234AthensGeorgia 8.2
- 234EdinburgTexas 8.2
- 234AnkenyIowa 8.2
- 234RockfordIllinois 8.2
- 234LafayetteIndiana 8.2
- 234MadisonWisconsin 8.2
- 234SunnysideWashington 8.2
- 241NewarkDelaware 8.1
- 241HomesteadFlorida 8.1
- 241White OakOhio 8.1
- 241RichmondVirginia 8.1
- 241WarrenOhio 8.1
- 241South MilwaukeeWisconsin 8.1
- 241MaranaArizona 8.1
- 241PocatelloIdaho 8.1
- 249Little RockArkansas 8.0
- 249LawrencevilleGeorgia 8.0
- 249Kansas CityKansas 8.0
- 249Baton RougeLouisiana 8.0
- 249FayettevilleNorth Carolina 8.0
- 249PortsmouthOhio 8.0
- 249ChesapeakeVirginia 8.0
- 249NorthbrookIllinois 8.0
- 249Lexingtonlow-cost sensorsMassachusetts 8.0
- 249SpringfieldMassachusetts 8.0
- 249BayonneNew Jersey 8.0
- 249Shaker HeightsOhio 8.0
- 249ConcordCalifornia 8.0
- 249Candler-McAfeeGeorgia 8.0
- 263HuntsvilleAlabama 7.9
- 263DallasTexas 7.9
- 263Des PlainesIllinois 7.9
- 263JolietIllinois 7.9
- 263SteubenvilleOhio 7.9
- 263YoungstownOhio 7.9
- 263Great FallsMontana 7.9
- 263SpokaneWashington 7.9
- 263TacomaWashington 7.9
- 272HagerstownMaryland 7.8
- 272ElkhartIndiana 7.8
- 272KokomoIndiana 7.8
- 272LimaOhio 7.8
- 272RutlandVermont 7.8
- 272BridgeportConnecticut 7.8
- 272SocorroTexas 7.8
- 272HermistonOregon 7.8
- 272La Crescenta-Montroselow-cost sensorsCalifornia 7.8
- 272MidwayFlorida 7.8
- 282St. LouisMissouri 7.7
- 282RochesterNew York 7.7
- 282UticaNew York 7.7
- 282AltoonaPennsylvania 7.7
- 282EugeneOregon 7.7
- 282HerrimanUtah 7.7
- 282AuburnWashington 7.7
- 282ParklandWashington 7.7
- 290Ferry PassFlorida 7.6
- 290Saint MatthewsKentucky 7.6
- 290ScaggsvilleMaryland 7.6
- 290HernandoMississippi 7.6
- 290Cleveland HeightsOhio 7.6
- 290HammondIndiana 7.6
- 290LansingMichigan 7.6
- 290BurlingtonVermont 7.6
- 298WashingtonDistrict of Columbia 7.5
- 298Fort LauderdaleFlorida 7.5
- 298ValricoFlorida 7.5
- 298AtlantaGeorgia 7.5
- 298AshlandKentucky 7.5
- 298JeffersontownKentucky 7.5
- 298FlorenceSouth Carolina 7.5
- 298AndersonIndiana 7.5
- 298New CityNew York 7.5
- 298White PlainsNew York 7.5
- 298San LeandroCalifornia 7.5
- 309MaconGeorgia 7.4
- 309DecaturIllinois 7.4
- 309BloomingtonIndiana 7.4
- 309ColumbusIndiana 7.4
- 309Ponca CityOklahoma 7.4
- 309Fort WorthTexas 7.4
- 309GalvestonTexas 7.4
- 309Mission BendTexas 7.4
- 309PeoriaIllinois 7.4
- 309GaryIndiana 7.4
- 309PortageIndiana 7.4
- 309BuffaloNew York 7.4
- 309SalemOregon 7.4
- 309WenatcheeWashington 7.4
- 323MontgomeryAlabama 7.3
- 323Warner RobinsGeorgia 7.3
- 323ChalmetteLouisiana 7.3
- 323BaltimoreMaryland 7.3
- 323Hunt ValleyMaryland 7.3
- 323CharlottesvilleVirginia 7.3
- 323PowayCalifornia 7.3
- 323Santa ClaritaCalifornia 7.3
- 323AshlandOregon 7.3
- 323SeattleWashington 7.3
- 333Deerfield BeachFlorida 7.2
- 333KennerLouisiana 7.2
- 333ElktonMaryland 7.2
- 333EdmondOklahoma 7.2
- 333LaredoTexas 7.2
- 333CaryIllinois 7.2
- 333ZionIllinois 7.2
- 333FlintMichigan 7.2
- 333PawtucketRhode Island 7.2
- 342Bonita SpringsFlorida 7.1
- 342MiamiFlorida 7.1
- 342Toms RiverNew Jersey 7.1
- 342AustinTexas 7.1
- 342SaginawTexas 7.1
- 342HermitagePennsylvania 7.1
- 342ProvidenceRhode Island 7.1
- 342SuperiorWisconsin 7.1
- 342MeridianIdaho 7.1
- 351SpringdaleArkansas 7.0
- 351West MemphisArkansas 7.0
- 351SavannahGeorgia 7.0
- 351RockvilleMaryland 7.0
- 351MorrisvilleNorth Carolina 7.0
- 351MasonOhio 7.0
- 351PortlandMaine 7.0
- 351WilkinsburgPennsylvania 7.0
- 351LewistonIdaho 7.0
- 351HillsboroOregon 7.0
- 361Phenix CityAlabama 6.9
- 361BearDelaware 6.9
- 361SpringfieldIllinois 6.9
- 361Fort ThomasKentucky 6.9
- 361EdgewoodMaryland 6.9
- 361Saint JosephMissouri 6.9
- 361East HamptonVirginia 6.9
- 361MolineIllinois 6.9
- 361DavisCalifornia 6.9
- 361Lake ElsinoreCalifornia 6.9
- 361The DallesOregon 6.9
- 361LongviewWashington 6.9
- 361ShorelineWashington 6.9
- 374Fort SmithArkansas 6.8
- 374DoverDelaware 6.8
- 374JacksonvilleFlorida 6.8
- 374Ponte Vedra BeachFlorida 6.8
- 374VeniceFlorida 6.8
- 374Live OakTexas 6.8
- 374RoanokeVirginia 6.8
- 374CharlestonWest Virginia 6.8
- 374SyracuseNew York 6.8
- 374WheelingWest Virginia 6.8
- 374Santa RosaCalifornia 6.8
- 374VacavilleCalifornia 6.8
- 386DecaturAlabama 6.7
- 386TallahasseeFlorida 6.7
- 386Winter ParkFlorida 6.7
- 386LemayMissouri 6.7
- 386University CityMissouri 6.7
- 386South VinelandNew Jersey 6.7
- 386North ChicopeeMassachusetts 6.7
- 386McKeesportPennsylvania 6.7
- 386Tri-CitiesWashington 6.7
- 395PaducahKentucky 6.6
- 395BrunswickGeorgia 6.6
- 395OlatheKansas 6.6
- 395ElizabethtownKentucky 6.6
- 395BloomingtonIllinois 6.6
- 395DuluthMinnesota 6.6
- 395BellevueNebraska 6.6
- 402TopekaKansas 6.5
- 402ClaytonNorth Carolina 6.5
- 402CorsicanaTexas 6.5
- 402New LondonConnecticut 6.5
- 402Des MoinesIowa 6.5
- 402West FargoNorth Dakota 6.5
- 402GlendoraCalifornia 6.5
- 402RedmondOregon 6.5
- 402WoodburnOregon 6.5
- 411TampaFlorida 6.4
- 411LebanonOhio 6.4
- 411JenksOklahoma 6.4
- 411TulsaOklahoma 6.4
- 411La PorteTexas 6.4
- 411Santa BarbaraCalifornia 6.4
- 411TigardOregon 6.4
- 411EllensburgWashington 6.4
- 411Moses LakeWashington 6.4
- 411Walla WallaWashington 6.4
- 421Coconut CreekFlorida 6.3
- 421Upper AltonIllinois 6.3
- 421Saint AndrewsSouth Carolina 6.3
- 421WorcesterMassachusetts 6.3
- 421OmahaNebraska 6.3
- 421YumaArizona 6.3
- 421Simi ValleyCalifornia 6.3
- 421BendOregon 6.3
- 421Spokane ValleyWashington 6.3
- 430Daytona BeachFlorida 6.2
- 430LakelandFlorida 6.2
- 430Lexington-FayetteKentucky 6.2
- 430Kansas CityMissouri 6.2
- 430New BrunswickNew Jersey 6.2
- 430EriePennsylvania 6.2
- 430AtascaderoCalifornia 6.2
- 430Thousand OaksCalifornia 6.2
- 430Coeur d'AleneIdaho 6.2
- 430BozemanMontana 6.2
- 430PendletonOregon 6.2
- 441PleasantvilleNew Jersey 6.1
- 441Oklahoma CityOklahoma 6.1
- 441North CharlestonSouth Carolina 6.1
- 441HaverhillMassachusetts 6.1
- 441PittsfieldMassachusetts 6.1
- 441PainesvilleOhio 6.1
- 441SalinasCalifornia 6.1
- 441AlbanyOregon 6.1
- 449Lake MaryFlorida 6.0
- 449New OrleansLouisiana 6.0
- 449ArnoldMissouri 6.0
- 449GreenvilleNorth Carolina 6.0
- 449JacksonTennessee 6.0
- 449BrocktonMassachusetts 6.0
- 449LowellMassachusetts 6.0
- 456FishersIndiana 5.9
- 456AshevilleNorth Carolina 5.9
- 456BostonMassachusetts 5.9
- 456LincolnNebraska 5.9
- 456Arroyo GrandeCalifornia 5.9
- 456Santa CruzCalifornia 5.9
- 456Spring ValleyNevada 5.9
- 456VancouverWashington 5.9
- 464DavieFlorida 5.8
- 464Fruit CoveFlorida 5.8
- 464New AlbanyIndiana 5.8
- 464Roanoke RapidsNorth Carolina 5.8
- 464ConwaySouth Carolina 5.8
- 464Fall RiverMassachusetts 5.8
- 464BangorMaine 5.8
- 464WatertownSouth Dakota 5.8
- 464BellinghamWashington 5.8
- 473Delray BeachFlorida 5.7
- 473SarasotaFlorida 5.7
- 473WellingtonFlorida 5.7
- 473McDonoughGeorgia 5.7
- 473South LaurelMaryland 5.7
- 473College StationTexas 5.7
- 473LewistonMaine 5.7
- 473PortsmouthNew Hampshire 5.7
- 473San RafaelCalifornia 5.7
- 473Spanish SpringsNevada 5.7
- 473Idaho FallsIdaho 5.7
- 484WestonFlorida 5.6
- 484Atlantic CityNew Jersey 5.6
- 484MooreOklahoma 5.6
- 484CookevilleTennessee 5.6
- 484Corpus ChristiTexas 5.6
- 484QuincyMassachusetts 5.6
- 484GahannaOhio 5.6
- 484Weirton HeightsWest Virginia 5.6
- 484CentraliaWashington 5.6
- 484AnchorageAlaska 5.6
- 494ClarksvilleTennessee 5.5
- 494MaryvilleTennessee 5.5
- 494DerryNew Hampshire 5.5
- 494HendersonNevada 5.5
- 494BillingsMontana 5.5
- 499Palm CityFlorida 5.4
- 499ColumbiaTennessee 5.4
- 499DyersburgTennessee 5.4
- 499HopewellVirginia 5.4
- 499LynnMassachusetts 5.4
- 499OrcuttCalifornia 5.4
- 499South Lake TahoeCalifornia 5.4
- 499Eagle PassTexas 5.4
- 499Coos BayOregon 5.4
- 508FairhopeAlabama 5.3
- 508PrichardAlabama 5.3
- 508Palm BayFlorida 5.3
- 508BeltonTexas 5.3
- 508DentonTexas 5.3
- 513GainesvilleFlorida 5.2
- 513DerbyKansas 5.2
- 513GilroyCalifornia 5.2
- 513ParadiseCalifornia 5.2
- 513Twin FallsIdaho 5.2
- 513HighlandUtah 5.2
- 519Belle GladeFlorida 5.1
- 519MuscatineIowa 5.1
- 519OdessaTexas 5.1
- 519McMinnvilleOregon 5.1
- 523KingsportTennessee 4.9
- 523Grand IslandNebraska 4.9
- 523DallasOregon 4.9
- 523Forest GroveOregon 4.9
- 523PortlandOregon 4.9
- 528LibertyMissouri 4.8
- 528BremertonWashington 4.8
- 528Salmon CreekWashington 4.8
- 531SpringfieldMissouri 4.7
- 531AberdeenSouth Dakota 4.7
- 531BeavertonOregon 4.7
- 531Rapid CitySouth Dakota 4.7
- 535RaymoreMissouri 4.6
- 535LaconiaNew Hampshire 4.6
- 535Apache JunctionArizona 4.6
- 535BismarckNorth Dakota 4.6
- 539AmarilloTexas 4.5
- 540HollisterCalifornia 4.4
- 540CanbyOregon 4.4
- 540AberdeenWashington 4.4
- 540HonoluluHawaii 4.4
- 540Makakilo / Kapolei / Honokai HaleHawaii 4.4
- 545PascoWashington 4.3
- 546MoscowIdaho 4.2
- 546LaceyWashington 4.2
- 546OrchardsWashington 4.2
- 549LawtonOklahoma 4.1
- 549BrookingsSouth Dakota 4.1
- 549Dodge CityKansas 4.1
- 549EnterpriseNevada 4.1
- 553Cedar CityUtah 3.9
- 554FillmoreCalifornia 3.8
- 554LompocCalifornia 3.8
- 554NipomoCalifornia 3.8
- 554San Luis ObispoCalifornia 3.8
- 554Mount VernonWashington 3.8
- 554Summerlin SouthNevada 3.8
- 560AdaOklahoma 3.7
- 560CoventryRhode Island 3.7
- 560HurricaneUtah 3.7
- 563Sioux FallsSouth Dakota 3.6
- 563Las CrucesNew Mexico 3.6
- 563KahuluiHawaii 3.6
- 566LubbockTexas 3.4
- 567MesquiteNevada 3.3
- 567CheyenneWyoming 3.3
- 569BellevueWashington 3.2
- 570Boulder CityNevada 3.1
- 571Green ValleyArizona 3.0
- 571GilletteWyoming 3.0
- 573PullmanWashington 2.8
- 573CasperWyoming 2.8
- 573Rock SpringsWyoming 2.8
- 576IssaquahWashington 2.7
- 577KīheiHawaii 2.5
- 577HiloHawaii 2.5
- 579CorvallisOregon 2.3
- 579LaramieWyoming 2.3
- 581Oak HarborWashington 2.1
- 582AnacortesWashington 1.2
- 583MarysvilleWashington 1.0
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+