《》20141045JournalofEnvironmentalHygieneOct.2014Vol.4No.5【】《》95201599Email13918678112@139.comEmailZd_cai@126.com。28、。85.7%、、、35.7%、17.9%、10.7%、14.3%60.7%。。、。CaseStudyonAccidentsPollutionofSecondaryWaterSuppliesLiuChengZengDecaiGaoYumingChenXiaAbstractObjectivesTounderstandthereasonsandfeaturesofaccidentsforthepollutionofsecondarywa-tersupplies.MethodsTwentyeightpollutioncasesforsecondarywatersupplywerecollectedandtheirreasonsmanagementandpreventionmeasureswereanalyzedretrospectively.ResultsThemainformofpollutionforsec-ondarywatersupplywasbiologicalpollutionaccountedfor85.7%suchasthecountercurrentflowofsewagetothereservoirlocatedinlowerpositionthebreakageandleakageofreservoirandpipelinesandthewaterpolluteddirectlybycontaminantstheincidenceswere35.7%17.9%10.7%and14.3%respectively.Theinvestiga-tionandmanagementshouldbestartedfromtheseitemsfirstly.Themainmanifestationofhealthhazardwasindi-gestivesystemaccountedfor60.7%ofallsymptoms.ConclusionsAppropriateindexesshouldbeselectedtoin-creasetheefficiencyofinvestigation.Themanagementshouldbeconsideredcomprehensivelyincludingelimina-tingrisksfromthesourceandtoprotecttheexposedpopulation.Preventiveexaminationanddailysupervisionshouldbestrengthenedtoavoidtheoccurrenceofsecondarywatersupplyaccidents.Whenconditionwaspermittedusingakindofnon-negativepressurewatersupplysystemtoreplacethesecondarywatersupplysystemwassugges-tedtoshortenthewatersupplychain.Keywordssecondarywatersupplypollutionreasoninvestigationmanagement200352%200449.2%1200770%·164·《》20141045JournalofEnvironmentalHygieneOct.2014Vol.4No.52。2009391948.7%。。199728。11.1282485.7%414.3%。937.5%114。。1.2、、、16、6、5、157.1%、21.4%、17.9%、3.6%。1.322、3、378.6%、10.7%、10.7%。1.4、2278.6%1、、、、、。2。1035.7%。、、、、。517.9%。、、、。。310.7%。。。414.3%。。1。、、、。1。199840kgpH3。1。、。。550115。1。。。1。、、。1。2000、、、、、7634。3、·264·《》20141045JournalofEnvironmentalHygieneOct.2014Vol.4No.5、。28117002342%。64252381.5%。24717、、、、1。ST6。422。4。。。4.1、pH、、、、、、、、、、、、。、、、、、、、、、、、、、。297。4.2、、、、、、5%、、、、、。55.12813、、、、pH、、、、。、、、。、、。8。。。。5.22823。27。《》GB17051-19979、、2014214《》、。5.3467·364·《》20141045JournalofEnvironmentalHygieneOct.2014Vol.4No.57.J.20123512360-364.8.J.2006234300-303.9.J.2011167-10.10.2007—2011J.201225211-213.11.J.2002195387-388.12.J.2012292104-108.13.J.201226271-273.463。6。、。10。、、11。1.J.2005311213-17.2.J.20093589.3.J.1999166367.4.J.2001821385.J.200713122.6.J.200173257.7.J.2008254322.8.D.2012.9.GB17051-1997S.1997.10.J.200827628.11.J..20043024117-118.【··】1.“、、、”。2.34“”“etal.”。3.。4.。1.J...J.19966145-47.2.M.....M.195715-18.3〔〕.C.//.....C.//..1993.70-82.4.D...D.1988.5.S...GB/T5750-2006S.2007.6.C//..-..6.C//.1985203-212.7.EB/OL.....EB/OL.1998-08-16.1998-10-04.http//.cajcd.edu.cn.·764·