About the Air Quality Index | Puget Sound Clean Air Agency, WA

Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to ... SkiptoMainContent Loading Close Loading DoNotShowAgain Close Facebook Twitter HomeAirQualityBasicsAbouttheAirQualityIndex AbouttheAirQualityIndex TheAirQualityIndex(AQI)isacolor-codedtoolforreportingdailyairquality.Itprovidessimpleinformationonlocalairquality,thehealthconcernsfordifferentlevelsofairpollution,andhowyoucanprotectyourhealthwhenpollutantsreachunhealthylevels.FormoreinformationontheAQI,andtolookattheAQInationwide,pleasegotowww.airnow.gov.AirQualityIndexTableLevelsofHealthConcernMeaningColorsGoodAirqualityisconsideredsatisfactory.AirpollutionposeslittleornoriskGreenModerateAirqualityisacceptable;however,forsomepollutantstheremaybeamoderatehealthconcernforaverysmallnumberofpeoplewhoareunusuallysensitivetoairpollution.YellowUnhealthyforSensitiveGroupsPeoplewithheartandlungdisease,olderadults,andchildrenareatgreaterriskfromairpollution.OrangeUnhealthyEveryonemaybegintoexperiencehealtheffects;membersofsensitivegroupsmayexperiencemoreserioushealtheffectsRedVeryUnhealthyHealthAlert:everyonemayexperiencemoreserioushealtheffects.PurpleHazardousHealthwarningsofemergencyconditions.Theentirepopulationismorelikelytobeaffected.Maroon AirPollution&YourHealth WoodSmoke&COVID-19 AbouttheAirQualityIndex AirMonitoring CriteriaAirPollutants AirToxics GreenhouseGases Asbestos BurnBanStatus Community FileComplaint RecordsRequest ContactUs Home SiteMap ContactUs Accessibility CopyrightNotices PrivacyPolicy /QuickLinks.aspx PoweredByCivicPlus® Facebook Twitter Pinterest Delicious Blogger LinkedIn Home MyAccount PrinterFriendly EmailPage ContactUs RSS SiteMap TranslatePage Notifications Documents ArrowLeft ArrowRight [] SlideshowLeftArrow SlideshowRightArrow