SmogRank / Countries / United States / July 2024
Most polluted cities in United States, July 2024
622 cities in United States ranked by their average PM2.5 over the 31 days. Worst: Meridian at 25.9 µg/m³, #31 of 2,047 cities in the world. Cleanest: San Luis Obispo at 2.5. A city needs measurements on 70% of the days to be ranked.
- 1MeridianIdaho 25.9
- 2NampaIdaho 23.6
- 3BoiseIdaho 21.6
- 4LewistonIdaho 20.4
- 5GlendoraCalifornia 20.1
- 6FontanaCalifornia 19.7
- 7Twin FallsIdaho 19.6
- 8ConroeTexas 17.3
- 8HelenaMontana 17.3
- 8BismarckNorth Dakota 17.3
- 8SheridanWyoming 17.3
- 12Great FallsMontana 16.7
- 13Los AngelesCalifornia 16.4
- 13BendOregon 16.4
- 15HoustonTexas 16.2
- 15Rapid CitySouth Dakota 16.2
- 17Jurupa ValleyCalifornia 16.0
- 18ButteMontana 15.9
- 19VisaliaCalifornia 15.8
- 19AltamontOregon 15.8
- 21BakersfieldCalifornia 15.4
- 22MillcreekUtah 15.3
- 23BurbankCalifornia 15.2
- 23RiversideCalifornia 15.2
- 23OremUtah 15.2
- 26West Valley CityUtah 14.6
- 27LaredoTexas 14.5
- 27RedfordMichigan 14.5
- 29ShreveportLouisiana 14.4
- 29Santa ClaritaCalifornia 14.4
- 31PocatelloIdaho 14.2
- 32Port ArthurTexas 14.1
- 33MissionTexas 14.0
- 34SpringdaleArkansas 13.9
- 34RedmondOregon 13.9
- 36Little RockArkansas 13.8
- 36BartlettTennessee 13.8
- 36ClovisCalifornia 13.8
- 39Missouri CityTexas 13.7
- 39El PasoTexas 13.7
- 41PortervilleCalifornia 13.6
- 42Fort LauderdaleFlorida 13.5
- 42Corpus ChristiTexas 13.5
- 42West JordanUtah 13.5
- 45TexarkanaTexas 13.4
- 45BillingsMontana 13.4
- 47Columbialow-cost sensorsMissouri 13.2
- 48BaytownTexas 13.1
- 48MoscowIdaho 13.1
- 48GilletteWyoming 13.1
- 51Lexingtonlow-cost sensorsMassachusetts 13.0
- 52FresnoCalifornia 12.9
- 53VictorvilleCalifornia 12.7
- 53Idaho FallsIdaho 12.7
- 53Salt Lake CityUtah 12.7
- 56SaginawTexas 12.6
- 56TooeleUtah 12.6
- 58PasadenaTexas 12.5
- 59La Crescenta-Montroselow-cost sensorsCalifornia 12.4
- 60EdinburgTexas 12.3
- 60Mission BendTexas 12.3
- 60MagnaUtah 12.3
- 63CorcoranCalifornia 12.2
- 64El CentroCalifornia 12.1
- 64Yuba CityCalifornia 12.1
- 64Eagle PassTexas 12.1
- 64RexburgIdaho 12.1
- 64MissoulaMontana 12.1
- 64SunnysideWashington 12.1
- 70OregonOhio 12.0
- 70LongmontColorado 12.0
- 70MedfordOregon 12.0
- 73East Saint LouisIllinois 11.9
- 74ScaggsvilleMaryland 11.8
- 74Carsonlow-cost sensorsCalifornia 11.8
- 76RochesterMinnesota 11.7
- 76ParadiseCalifornia 11.7
- 78BirminghamAlabama 11.6
- 78Fort WorthTexas 11.6
- 78Live OakTexas 11.6
- 78Lake ElsinoreCalifornia 11.6
- 82MooreOklahoma 11.5
- 82TulsaOklahoma 11.5
- 82WyomingMichigan 11.5
- 82BanningCalifornia 11.5
- 82BountifulUtah 11.5
- 87AustinTexas 11.4
- 87Hawthornelow-cost sensorsCalifornia 11.4
- 89IndianapolisIndiana 11.3
- 89St. LouisMissouri 11.3
- 89La PorteTexas 11.3
- 89Agouralow-cost sensorsCalifornia 11.3
- 89AnaheimCalifornia 11.3
- 89IndioCalifornia 11.3
- 95West FargoNorth Dakota 11.2
- 96MiamiFlorida 11.1
- 96McAlesterOklahoma 11.1
- 96BrownsvilleTexas 11.1
- 96CorsicanaTexas 11.1
- 96Saint PaulMinnesota 11.1
- 96ThorntonColorado 11.1
- 96YakimaWashington 11.1
- 103OcalaFlorida 11.0
- 103Saint JosephMissouri 11.0
- 103WatertownSouth Dakota 11.0
- 103Chula VistaCalifornia 11.0
- 103Inglewoodlow-cost sensorsCalifornia 11.0
- 103RichmondCalifornia 11.0
- 109Oklahoma CityOklahoma 10.9
- 109BeltonTexas 10.9
- 109DentonTexas 10.9
- 109EastpointeMichigan 10.9
- 109BrawleyCalifornia 10.9
- 109AshlandOregon 10.9
- 115DearbornMichigan 10.8
- 115HerrimanUtah 10.8
- 117CincinnatiOhio 10.7
- 117ColumbusOhio 10.7
- 117MiddletownOhio 10.7
- 117College StationTexas 10.7
- 117ClevelandOhio 10.7
- 117Lomitalow-cost sensorsCalifornia 10.7
- 117Torrancelow-cost sensorsCalifornia 10.7
- 124GaryIndiana 10.6
- 124KalamazooMichigan 10.6
- 124MinneapolisMinnesota 10.6
- 124WestervilleOhio 10.6
- 128VeniceFlorida 10.5
- 128EvansvilleIndiana 10.5
- 128Jersey CityNew Jersey 10.5
- 128Santa Monicalow-cost sensorsCalifornia 10.5
- 128ReddingCalifornia 10.5
- 128North OgdenUtah 10.5
- 134Granite CityIllinois 10.4
- 134DerbyKansas 10.4
- 136LafayetteLouisiana 10.3
- 136NorwoodOhio 10.3
- 136EdmondOklahoma 10.3
- 136ShakopeeMinnesota 10.3
- 136ElizabethNew Jersey 10.3
- 136MaderaCalifornia 10.3
- 136TurlockCalifornia 10.3
- 143Bonita SpringsFlorida 10.2
- 143GainesvilleGeorgia 10.2
- 143GalvestonTexas 10.2
- 143AlbanyNew York 10.2
- 143CantonOhio 10.2
- 143West MifflinPennsylvania 10.2
- 143PendletonOregon 10.2
- 143SpokaneWashington 10.2
- 151PhiladelphiaPennsylvania 10.1
- 151Franklin ParkIllinois 10.1
- 151PatersonNew Jersey 10.1
- 151PerrysburgOhio 10.1
- 151CalexicoCalifornia 10.1
- 151El CajonCalifornia 10.1
- 151San JoseCalifornia 10.1
- 151Coeur d'AleneIdaho 10.1
- 159Coconut CreekFlorida 10.0
- 159LawrencevilleGeorgia 10.0
- 159FishersIndiana 10.0
- 159JasperIndiana 10.0
- 159JeffersonvilleIndiana 10.0
- 159PortsmouthOhio 10.0
- 159DallasTexas 10.0
- 159HammondIndiana 10.0
- 159MankatoMinnesota 10.0
- 159EwingNew Jersey 10.0
- 159New York CityNew York 10.0
- 159WarrenOhio 10.0
- 171East LakeFlorida 9.9
- 171Kansas CityKansas 9.9
- 171Valley StationKentucky 9.9
- 171Fort LeeNew Jersey 9.9
- 171Long BeachCalifornia 9.9
- 171ModestoCalifornia 9.9
- 171San DiegoCalifornia 9.9
- 171Spanish ForkUtah 9.9
- 171Spokane ValleyWashington 9.9
- 180West MemphisArkansas 9.8
- 180TopekaKansas 9.8
- 180JenksOklahoma 9.8
- 180HendersonvilleTennessee 9.8
- 184OlatheKansas 9.7
- 184Ponca CityOklahoma 9.7
- 184GeorgetownTexas 9.7
- 184CaryIllinois 9.7
- 184Fort WayneIndiana 9.7
- 184PortageIndiana 9.7
- 184BurnsvilleMinnesota 9.7
- 184LindenNew Jersey 9.7
- 184SuperiorWisconsin 9.7
- 184Casa GrandeArizona 9.7
- 184GreeleyColorado 9.7
- 184Grants PassOregon 9.7
- 196Belle GladeFlorida 9.6
- 196San MarcosTexas 9.6
- 196HuntingtonWest Virginia 9.6
- 196NorthbrookIllinois 9.6
- 196ElkhartIndiana 9.6
- 196PullmanWashington 9.6
- 196FairbanksAlaska 9.6
- 203Ponte Vedra BeachFlorida 9.5
- 203LouisvilleKentucky 9.5
- 203TaylorTexas 9.5
- 203NapervilleIllinois 9.5
- 203DuluthMinnesota 9.5
- 203TrentonNew Jersey 9.5
- 203Colorado SpringsColorado 9.5
- 203OdessaTexas 9.5
- 211DaytonOhio 9.4
- 211SpringfieldOhio 9.4
- 211DetroitMichigan 9.4
- 211Saint CloudMinnesota 9.4
- 211Saint MichaelMinnesota 9.4
- 211LimaOhio 9.4
- 211BerkeleyCalifornia 9.4
- 211ChicoCalifornia 9.4
- 211South Lake TahoeCalifornia 9.4
- 211Sunland ParkNew Mexico 9.4
- 211Las VegasNevada 9.4
- 211HighlandUtah 9.4
- 223Delray BeachFlorida 9.3
- 223JeffersontownKentucky 9.3
- 223DurhamNorth Carolina 9.3
- 223PennsaukenNew Jersey 9.3
- 223Toms RiverNew Jersey 9.3
- 223DanburyConnecticut 9.3
- 223South BendIndiana 9.3
- 223New BrunswickNew Jersey 9.3
- 223MidwayFlorida 9.3
- 232Palm CityFlorida 9.2
- 232Baton RougeLouisiana 9.2
- 232Roanoke RapidsNorth Carolina 9.2
- 232AdaOklahoma 9.2
- 232Saint AndrewsSouth Carolina 9.2
- 232Des PlainesIllinois 9.2
- 232JolietIllinois 9.2
- 232Michigan CityIndiana 9.2
- 232PortlandMaine 9.2
- 232Lincoln ParkMichigan 9.2
- 232BlaineMinnesota 9.2
- 232HollisterCalifornia 9.2
- 232MantecaCalifornia 9.2
- 232PowayCalifornia 9.2
- 232RosevilleCalifornia 9.2
- 232DenverColorado 9.2
- 232Fort CollinsColorado 9.2
- 232Walla WallaWashington 9.2
- 250Saint MatthewsKentucky 9.1
- 250HernandoMississippi 9.1
- 250HartfordConnecticut 9.1
- 250Calumet CityIllinois 9.1
- 250LafayetteIndiana 9.1
- 250FillmoreCalifornia 9.1
- 250Simi ValleyCalifornia 9.1
- 257WashingtonDistrict of Columbia 9.0
- 257Lake MaryFlorida 9.0
- 257ArnoldMissouri 9.0
- 257GreensboroNorth Carolina 9.0
- 257MorrisvilleNorth Carolina 9.0
- 257AnkenyIowa 9.0
- 257FlintMichigan 9.0
- 257LincolnNebraska 9.0
- 257DublinOhio 9.0
- 257HarrisburgPennsylvania 9.0
- 257GlendaleArizona 9.0
- 257StocktonCalifornia 9.0
- 257WoodlandCalifornia 9.0
- 270PrichardAlabama 8.9
- 270DavieFlorida 8.9
- 270HomesteadFlorida 8.9
- 270Atlantic CityNew Jersey 8.9
- 270East RidgeTennessee 8.9
- 270BrookfieldIllinois 8.9
- 270ChicagoIllinois 8.9
- 270Apple ValleyMinnesota 8.9
- 270MilwaukeeWisconsin 8.9
- 270BridgeportConnecticut 8.9
- 270HobbsNew Mexico 8.9
- 270AmarilloTexas 8.9
- 282DecaturIllinois 8.8
- 282SpringfieldIllinois 8.8
- 282RaleighNorth Carolina 8.8
- 282SpartanburgSouth Carolina 8.8
- 282WaterburyConnecticut 8.8
- 282Grand RapidsMichigan 8.8
- 282ScrantonPennsylvania 8.8
- 289SpringfieldMissouri 8.7
- 289FlorenceSouth Carolina 8.7
- 289ClarksvilleTennessee 8.7
- 289NashvilleTennessee 8.7
- 289BostonMassachusetts 8.7
- 289BrocktonMassachusetts 8.7
- 289BensalemPennsylvania 8.7
- 289HermistonOregon 8.7
- 297Deerfield BeachFlorida 8.6
- 297WellingtonFlorida 8.6
- 297Kansas CityMissouri 8.6
- 297PleasantvilleNew Jersey 8.6
- 297SewellNew Jersey 8.6
- 297CharlestonWest Virginia 8.6
- 297MuncieIndiana 8.6
- 297AugustaMaine 8.6
- 297Port HuronMichigan 8.6
- 297PortsmouthNew Hampshire 8.6
- 297PittsburghPennsylvania 8.6
- 297AberdeenSouth Dakota 8.6
- 297RutlandVermont 8.6
- 310PaducahKentucky 8.5
- 310ChalmetteLouisiana 8.5
- 310Hunt ValleyMaryland 8.5
- 310RockvilleMaryland 8.5
- 310Winston-SalemNorth Carolina 8.5
- 310ChattanoogaTennessee 8.5
- 310PeoriaIllinois 8.5
- 310Bay CityMichigan 8.5
- 310McKeesportPennsylvania 8.5
- 310WheelingWest Virginia 8.5
- 310TracyCalifornia 8.5
- 310Ken CarylColorado 8.5
- 310CondaIdaho 8.5
- 323LakelandFlorida 8.4
- 323AshlandKentucky 8.4
- 323LemayMissouri 8.4
- 323University CityMissouri 8.4
- 323DyersburgTennessee 8.4
- 323AshburnVirginia 8.4
- 323New LondonConnecticut 8.4
- 323ChampaignIllinois 8.4
- 323East ChicagoIndiana 8.4
- 323BuffaloNew York 8.4
- 323SteubenvilleOhio 8.4
- 323AllentownPennsylvania 8.4
- 323Eau ClaireWisconsin 8.4
- 323OceansideCalifornia 8.4
- 323SacramentoCalifornia 8.4
- 338NewarkDelaware 8.3
- 338HickoryNorth Carolina 8.3
- 338White OakOhio 8.3
- 338KnoxvilleTennessee 8.3
- 338TaylorMichigan 8.3
- 338AkronOhio 8.3
- 338ReadingPennsylvania 8.3
- 338WilkinsburgPennsylvania 8.3
- 338UkiahCalifornia 8.3
- 338Dodge CityKansas 8.3
- 338Spring ValleyNevada 8.3
- 338BoulderColorado 8.3
- 338BadgerAlaska 8.3
- 338Summerlin SouthNevada 8.3
- 352DoverDelaware 8.2
- 352New OrleansLouisiana 8.2
- 352SulphurLouisiana 8.2
- 352YoungstownOhio 8.2
- 352LebanonPennsylvania 8.2
- 352Green BayWisconsin 8.2
- 352Carson CityNevada 8.2
- 352CasperWyoming 8.2
- 360GadsdenAlabama 8.1
- 360AtlantaGeorgia 8.1
- 360Upper AltonIllinois 8.1
- 360KennerLouisiana 8.1
- 360LexingtonNorth Carolina 8.1
- 360South VinelandNew Jersey 8.1
- 360LawtonOklahoma 8.1
- 360New HavenConnecticut 8.1
- 360ClintonIowa 8.1
- 360Iowa CityIowa 8.1
- 360LansingMichigan 8.1
- 360MedinaOhio 8.1
- 360NorristownPennsylvania 8.1
- 360BrookingsSouth Dakota 8.1
- 360LittletonColorado 8.1
- 360AlbuquerqueNew Mexico 8.1
- 360Las CrucesNew Mexico 8.1
- 377ValricoFlorida 8.0
- 377RaymoreMissouri 8.0
- 377JacksonTennessee 8.0
- 377MaryvilleTennessee 8.0
- 377Cleveland HeightsOhio 8.0
- 377DavenportIowa 8.0
- 377HollandMichigan 8.0
- 377NewburghNew York 8.0
- 377YumaArizona 8.0
- 377Elk Grovelow-cost sensorsCalifornia 8.0
- 377San LeandroCalifornia 8.0
- 377CheyenneWyoming 8.0
- 377Rock SpringsWyoming 8.0
- 390FairhopeAlabama 7.9
- 390Daytona BeachFlorida 7.9
- 390TampaFlorida 7.9
- 390Lexington-FayetteKentucky 7.9
- 390CharlottesvilleVirginia 7.9
- 390Cedar RapidsIowa 7.9
- 390WaterlooIowa 7.9
- 390PittsfieldMassachusetts 7.9
- 390RochesterNew York 7.9
- 390JohnstownPennsylvania 7.9
- 390TempeArizona 7.9
- 390FolsomCalifornia 7.9
- 402Fort SmithArkansas 7.8
- 402New AlbanyIndiana 7.8
- 402Fort ThomasKentucky 7.8
- 402CharlotteNorth Carolina 7.8
- 402ChesterPennsylvania 7.8
- 402CookevilleTennessee 7.8
- 402HarrisonburgVirginia 7.8
- 402RockfordIllinois 7.8
- 402PhoenixArizona 7.8
- 402GaltCalifornia 7.8
- 402Thousand OaksCalifornia 7.8
- 402Tri-CitiesWashington 7.8
- 414DecaturAlabama 7.7
- 414ColumbiaTennessee 7.7
- 414ChesapeakeVirginia 7.7
- 414RoanokeVirginia 7.7
- 414LynnMassachusetts 7.7
- 414DerryNew Hampshire 7.7
- 414PawtucketRhode Island 7.7
- 414WeirtonWest Virginia 7.7
- 414MesaArizona 7.7
- 414LancasterCalifornia 7.7
- 414HendersonNevada 7.7
- 425SarasotaFlorida 7.6
- 425KennesawGeorgia 7.6
- 425ColumbusIndiana 7.6
- 425JacksonMississippi 7.6
- 425GreenvilleNorth Carolina 7.6
- 425East HamptonVirginia 7.6
- 425AndersonIndiana 7.6
- 425Fall RiverMassachusetts 7.6
- 425QuincyMassachusetts 7.6
- 425SpringfieldMassachusetts 7.6
- 425HolbrookNew York 7.6
- 425CarlislePennsylvania 7.6
- 425WaukeshaWisconsin 7.6
- 425Weirton HeightsWest Virginia 7.6
- 425LubbockTexas 7.6
- 425Moses LakeWashington 7.6
- 425Oxon Hill-GlassmanorMaryland 7.6
- 425RandolphNew Jersey 7.6
- 443AlbanyGeorgia 7.5
- 443BaltimoreMaryland 7.5
- 443MasonOhio 7.5
- 443YorkPennsylvania 7.5
- 443North CharlestonSouth Carolina 7.5
- 443Rose HillVirginia 7.5
- 443SpringfieldVirginia 7.5
- 443WorcesterMassachusetts 7.5
- 443KeeneNew Hampshire 7.5
- 443AltoonaPennsylvania 7.5
- 443BethlehemPennsylvania 7.5
- 443ProvidenceRhode Island 7.5
- 443NogalesArizona 7.5
- 443MercedCalifornia 7.5
- 443Candler-McAfeeGeorgia 7.5
- 458TrussvilleAlabama 7.4
- 458ColumbusGeorgia 7.4
- 458Warner RobinsGeorgia 7.4
- 458BloomingtonIndiana 7.4
- 458LibertyMissouri 7.4
- 458KingsportTennessee 7.4
- 458BloomingtonIllinois 7.4
- 458LowellMassachusetts 7.4
- 458LancasterPennsylvania 7.4
- 458CoventryRhode Island 7.4
- 458Apache JunctionArizona 7.4
- 458ParklandWashington 7.4
- 458RentonWashington 7.4
- 471Palm BayFlorida 7.3
- 471MaconGeorgia 7.3
- 471Wake Forestlow-cost sensorsNorth Carolina 7.3
- 471Des MoinesIowa 7.3
- 471MolineIllinois 7.3
- 471KokomoIndiana 7.3
- 471YpsilantiMichigan 7.3
- 471RenoNevada 7.3
- 471Columbia CityWashington 7.3
- 480Phenix CityAlabama 7.2
- 480BearDelaware 7.2
- 480ValdostaGeorgia 7.2
- 480RichmondVirginia 7.2
- 480LewistonMaine 7.2
- 480HermitagePennsylvania 7.2
- 480OaklandCalifornia 7.2
- 487Ferry PassFlorida 7.1
- 487GainesvilleFlorida 7.1
- 487South LaurelMaryland 7.1
- 487ClemmonsNorth Carolina 7.1
- 487ConwaySouth Carolina 7.1
- 487BangorMaine 7.1
- 487New CityNew York 7.1
- 487UticaNew York 7.1
- 487Shaker HeightsOhio 7.1
- 487State CollegePennsylvania 7.1
- 487AppletonWisconsin 7.1
- 487LincolnCalifornia 7.1
- 487SeattleWashington 7.1
- 500BessemerAlabama 7.0
- 500WilmingtonDelaware 7.0
- 500WestonFlorida 7.0
- 500GulfportMississippi 7.0
- 500GreenvilleSouth Carolina 7.0
- 500DavisCalifornia 7.0
- 506Fruit CoveFlorida 6.9
- 506Winter ParkFlorida 6.9
- 506SavannahGeorgia 6.9
- 506White PlainsNew York 6.9
- 506EriePennsylvania 6.9
- 506MadisonWisconsin 6.9
- 506PleasantonCalifornia 6.9
- 506Cedar CityUtah 6.9
- 514AugustaGeorgia 6.8
- 514AshevilleNorth Carolina 6.8
- 514MarquetteMichigan 6.8
- 514BayonneNew Jersey 6.8
- 514South MilwaukeeWisconsin 6.8
- 514MaranaArizona 6.8
- 514Santa CruzCalifornia 6.8
- 514EnterpriseNevada 6.8
- 514The DallesOregon 6.8
- 514AuburnWashington 6.8
- 524JacksonvilleFlorida 6.7
- 524TallahasseeFlorida 6.7
- 524ElktonMaryland 6.7
- 524North ChicopeeMassachusetts 6.7
- 528McDonoughGeorgia 6.6
- 528EdgewoodMaryland 6.6
- 528Live Oaklow-cost sensorsCalifornia 6.6
- 528SalinasCalifornia 6.6
- 528TruckeeCalifornia 6.6
- 533Safety HarborFlorida 6.5
- 533BrunswickGeorgia 6.5
- 533HattiesburgMississippi 6.5
- 533Oak LawnIllinois 6.5
- 533SyracuseNew York 6.5
- 533PainesvilleOhio 6.5
- 533TucsonArizona 6.5
- 533Spanish SpringsNevada 6.5
- 541HuntsvilleAlabama 6.4
- 541MontgomeryAlabama 6.4
- 541AthensGeorgia 6.4
- 541PascagoulaMississippi 6.4
- 541MuscatineIowa 6.4
- 546Goletalow-cost sensorsCalifornia 6.3
- 546PuebloColorado 6.3
- 548JenisonMichigan 6.2
- 548San FranciscoCalifornia 6.2
- 548San RafaelCalifornia 6.2
- 548Watsonvillelow-cost sensorsCalifornia 6.2
- 548Rio RanchoNew Mexico 6.2
- 548LaramieWyoming 6.2
- 554ZionIllinois 6.1
- 554MesquiteNevada 6.1
- 554BellinghamWashington 6.1
- 557LebanonOhio 6.0
- 557Sioux FallsSouth Dakota 6.0
- 557Prunedalelow-cost sensorsCalifornia 6.0
- 557Seasidelow-cost sensorsCalifornia 6.0
- 557WenatcheeWashington 6.0
- 562HopewellVirginia 5.9
- 562GreenfieldMassachusetts 5.9
- 562TigardOregon 5.9
- 562TacomaWashington 5.9
- 566GahannaOhio 5.8
- 566Redwood CityCalifornia 5.8
- 566Santa BarbaraCalifornia 5.8
- 566EugeneOregon 5.8
- 570OrcuttCalifornia 5.7
- 571West PensacolaFlorida 5.6
- 571Boulder CityNevada 5.6
- 571HurricaneUtah 5.6
- 574EllensburgWashington 5.5
- 575LaconiaNew Hampshire 5.4
- 575Casas AdobesArizona 5.4
- 575GilroyCalifornia 5.4
- 578LaceyWashington 5.3
- 579ShorelineWashington 5.1
- 580LongviewWashington 5.0
- 580Salmon CreekWashington 5.0
- 582Grand JunctionColorado 4.9
- 583Oak HarborWashington 4.8
- 584BremertonWashington 4.7
- 585AtascaderoCalifornia 4.6
- 585CanbyOregon 4.6
- 585AnacortesWashington 4.6
- 585CentraliaWashington 4.6
- 589HagerstownMaryland 4.4
- 589SalemOregon 4.4
- 589Mount VernonWashington 4.4
- 589Port AngelesWashington 4.4
- 593Arroyo GrandeCalifornia 4.2
- 593Florinlow-cost sensorsCalifornia 4.2
- 593HillsboroOregon 4.2
- 593MilwaukieOregon 4.2
- 593AberdeenWashington 4.2
- 598Green ValleyArizona 4.1
- 598Makakilo / Kapolei / Honokai HaleHawaii 4.1
- 600GreshamOregon 4.0
- 600BellevueWashington 4.0
- 600VancouverWashington 4.0
- 600KahuluiHawaii 4.0
- 604RoseburgOregon 3.9
- 605AlbanyOregon 3.8
- 606LompocCalifornia 3.7
- 606PortlandOregon 3.7
- 608VacavilleCalifornia 3.6
- 608Coos BayOregon 3.6
- 610Santa RosaCalifornia 3.5
- 610BeavertonOregon 3.5
- 612HonoluluHawaii 3.4
- 613CorvallisOregon 3.1
- 613WoodburnOregon 3.1
- 615MarysvilleWashington 3.0
- 616KīheiHawaii 2.9
- 616HiloHawaii 2.9
- 618Forest GroveOregon 2.8
- 618AnchorageAlaska 2.8
- 620McMinnvilleOregon 2.7
- 621DallasOregon 2.6
- 622San Luis ObispoCalifornia 2.5
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+