air quality index

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1、U.S.EnvironmentalProtectionAgencyOfficeofAirQualityPlanningandStandardsOutreachandInformationDivisionResearchTrianglePark,NCAugust2009EPA-456/F-09-002AGuidetoAirQualityandYourHealthRecycled/recyclable.Printedwithvegetableoil-basedinkson100%postconsumerprocess,chlorine-freerecycledpaper

2、.“It’sacodereddayforozone.”“Particlepollutionlevelsareforecasttobeunhealthyforsensitivegroups.”“Localairqualityisveryunhealthytoday.”YoumayhearthesealertsonradioorTVorreadtheminthenewspaper.Butwhatdotheymeanifyou:Areactiveoutdoors?Havechildrenwhoplayoutdoors?Areanolderadult?Haveheartor

3、lungdisease?Thisbookletwillhelpyouunderstandhowtofindoutaboutairqualityinyourareaandprotectyourhealth.1AirQualityIndexWhyisairqualityHowdoestheAQIwork?important?ThinkoftheAQIasayardstickthatrunsfrom0to500.ThehighertheAQIvalue,thegreaterthelevelofairpol-Localairqualityaffectshowlutionan

4、dthegreaterthehealthconcern.Forexample,anyouliveandbreathe.LikeAQIvalueof50representsgoodairqualitywithlittleornotheweather,itcanchangepotentialtoaffectpublichealth,whileanAQIvalueoverfromdaytodayoreven300representsairqualitysohazardousthateveryonemayhourtohour.TheU.S.experienceserious

5、effects.EnvironmentalProtectionAgency(EPA)andyourAnAQIvalueof100generallycorrespondstothenationalairlocalairqualityagencyqualitystandardforthepollutant,whichisthelevelEPAhassethavebeenworkingtomaketoprotectpublichealth.AQIvaluesatorbelow100aregenerallyinformationaboutoutdoorthoughtofas

6、satisfactory.WhenAQIvaluesareabove100,airairqualityaseasytofindqualityisconsideredtobeunhealthy—atfirstforcertainsensitiveAirqualitydirectlyaffectsourqualitygroupsofpeople,thenforeveryoneasAQIvaluesincrease.andunderstandasweatheroflife.forecasts.AkeytoolinthiseffortistheAirQualityIndex

7、,orAQI.EPAandlocaloffi-WhatdotheAQIvaluesmean?cialsusetheAQItoprovidesimpleinformationaboutyourThepurposeoftheAQIistohelpyouunderstandwhatlocallocalairquality,howunhealthyairmayaffectyou,andhowairqualitymeanstoyourhealth.Tomakeiteasiertounder-youcanprotectyourhealth.stand,theAQIisdiv