一、我国城市实施分质供水的背景及其现状　　长期以来 ,我国城市供水系统都采用统一给水方式 ,即不管什么用途都按照生活饮用水标准供给。在过去经济不发达时期 ,用水量不大、用途种类单一的情况下 ,采用这种方式是可行的。如今 ,优质水资源十分紧张 ,在水用途日趋多样化的情 First, the implementation of the background of the quality of water supply in cities and its status quo For a long time, China’s urban water supply systems have adopted a unified water supply, that no matter what the use of drinking water standards in accordance with the supply. In the past economic underdevelopment, water consumption is not large, the use of a single type of circumstances, the use of this approach is feasible. Nowadays, high-quality water resources are very tense and their use in water is increasingly diversified