Water quality analysis of secondary water supply in Lucheng district of Wenzhou city,2008

Objective To understand the water quality of secondary water supply in Lucheng district of Wenzhou city in Zhejiang province. Methods A 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 Test process and sanitary standard for drinking water. Evaluation was according to CJ/T 206-2005 Test process and sanitary standard for drinking water. And standard for drift chloride followed National Standards for Drinking Water Quality (GB 5749-2006). Results The qualification rate of water examined in 2008 was 80.4%. Conclusion The 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.