Abstract: ObjectiveTo understand the water quality of secondary water supply in Lucheng district of Wenzhou city in Zhejiang province. MethodsA total of 5 families were selected as sampling points from 12 areas of the whole district based on Quincunx sampling method. Tap water from the secondary water supply network was collected for the analysis of 18 hygienic indices. Examine method was based on GB/T 5750-2006 ITest process and sanitary standard for drinking water/I. Evaluation was according to CJ/T 206-2005 ITest process and sanitary standard for drinking water/I. And standard for drift chloride followed INational Standards for Drinking Water Quality /I(GB 5749-2006). ResultsThe qualification rate of water examined in 2008 was 80.4%. ConclusionThe major unqualified items of the secondary water in Lucheng district are drift chloride, turbidity, and ferrum. The qualification rate is around the medium level of the whole nation. The aging of water tanks and pipes as well as the hidden danger for secondary water supply to spread infectious diseases call for intensive attention from the government.