Effect of water source pollution on the water quality of Shanghai water supply system

The paper describes the quality of water source in Shanghai, China and its water supply system. The effect of purification by traditional water treatment process and the effluent biological stability were evaluated by measuring quality parameters in the water supply system. The data showed that the main pollutants in the water source of Huangpu River were organics and ammonia. The conventional water treatment process is not effective to remove these pollutants. Concentrations of nitrite, nitrate, ammonia and UV 254 are affected by the water distribution system (DS). The effect is more obvious especially for nitrate and UV 254 . In addition, the turbidity and chroma increased along the water supply system. The data obtained in this study show the extent of biological instability of drinking water in Shanghai.