Ecologically, periphyton community structure can be used to identify water quality of a river. To understand the condition of water quality of the Kampar River based on periphyton community, a research was conducted from July 2017. There were five (5) sampling points, in the upstream (S1), around the floating cages (S2), in the area after the cage (S3 and S4) and in the downstream (S5). Water s…