Periphyton is a microorganism that attached to submerged substrate. This research aims to determine the trophic state of the Bakuok Lake in Aur Sati Village based on periphton abundance. This reseacrh has been conducted in July- August 2019. There were 3 stations, namely Station 1 (around the plantation area), Station 2 (settlements area) and Station 3 (around the net cages area). In each stati…