Abstract In PLTA Koto Panjang Dam, plastic waste comes from various community activities and fishery activities. The waste is destroyed into small particles (0.3-5mm) called microplastics. To determine the presence of microplastics in the water column, a study was conducted in December 2020 - February 2021. Water samples were taken from 3 stations with 3 sampling points at 3 different dept…