The fish slaughtering industry in Pasar Jaya Cijantung, Pasar Rebo district, East Jakarta City discharges liquid waste directly into the water body without a treatment rnprocess. The COD level of waste reached 1,759 mg/L, exceeding the set quality standard (200 mg/L) based on the Regulation of the Minister of Environment No. 5 of 2014. This waste disposal has the potential to pollute the enviro…