Abstract:In the area in question there are principally Lian-hua stream. Tong-hui stream and Tong-hui canal. The total length of these water courses investigated is 81 KM, on which 27 sampling points have been set in terms of pollution sources. The study includes, microbes, algae, protozoal ciliates, benthic macroinvertebrates, fish, and bioassay as well as some water quality analyses.The result of fuzzy analysis is presented, the sampling points are divided into five groups based on 0.9 similar level, as follows, Gr...