Even if a piped water supply is safe at its source, it is not always safe by the time it reaches the tap.
即使管道供水系统在水源处安全的，等水到达龙头时就不一定总是安全的了。
The quality standard of water supply source shall comply with the national water quality standard.
城市供水水源的水质应当达到国家规定的水质标准。
If the annual distribution plan of water supply source cannot satisfy the need of water supply, the Municipal water Resource Competent Authority shall modify the plan timely.
城市供水水源年度调配计划不能满足城市供水需求的，市水务主管部门应当及时调整。
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