In order to evaluate quality of the water environment, a novel water quality evaluation method is proposed. Water quality evaluation problem includes several influencing indices, which lead it become a multi-attribute decision making (MADM) problem. Then the new evaluation method is developed from the concept of a well- known MADM method named efficacy coefficient method. In the evaluation process, coefficient of variation (CV) method is used to determine the weights of indices. Finally, a practical case study proved that the proposed water quality evaluation method is efficient and feasible.
