Amit Rakshit*
This Article presents an overview of different selection problems of Multi-Criteria Decision Making and their methods which is used in waste water treatment. The typical selection problem deals with the evaluation of a set of alternatives in terms of a set of decision criteria. In this paper section A represents brief introduction of Multi Criteria Decision Making, Section B represents description of Multi Criteria Decision Making methods which is widely used in waste water treatment problems, Section C represents where MCDM methods can be applicable and section D represents the chart to compare the widely used method selection problems in waste water treatment.