The Safe Drinking Water Act requires that the water quality in water distribution systems is to be sampled at locations that are representative of the system; but the act does not describe how the sampling should be done. In this research, a concept of coverage is defined, and methods on how to locate monitoring stations in a network are described. The best set of stations is one that maximizes the coverage. The problems were formulated as integer programming problems, and were solved on a PC using an integer programming code. Two examples of their application to real systems are shown.
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Lee et al. (1992) studied this question.