Objective To analyze the impact of different water sources and water treatment processes on drinking water quality in Shanghai in order to make appropriate regulatory measures.
Methods Five districts of Shanghai were selected and 23 source water samples, 115 finished water samples, 672 tap water samples were tested in 2012.
Results The qualified rates of finished and tap water with different sources and water treatment processes were statistically different. The finished and tap water samples with the highest quality were from Qingcaosha reservoir. The qualified rates of oxygen consumption in the finished water and tap water samples using deep water treatment process were higher than those using traditional process.
Conclusion Good water sources and water treatment processes are required to improve the quality of drinking water in Shanghai.
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