Objective To identify the water quality of central water supply systems in Songjiang District, and provide the scientific basis for further improvement of drinking water quality.
Methods Current situation of 19 central water supply systems was surveyed, and the quality of their tap water was monitored.
Results These water supply systems in different towns of Songjiang met the basic needs of local residents, but their ability against emergency should be elevated. The water quality in 63.16% of the 19 water systems coincided with the standard, but some of testing indices, such as manganese, chemical oxygen demand (COD)and ammonia nitrogen in product water, and residue chlorine in tap water exceeded the standard limit.
Conclusion The water works whose product water quality did not meet the standard should improve their equipments and processing technique, so that to ensure the safety of the drinking water for the people.
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