Assessment of pollution load on surface water in the down-lower part of the Tapung Kiri river, Kampar regency, Riau

The Tapung Kiri River is experiencing degradation especially due to the increase in the oil palm plantation industry and sand mining activities. The research was conducted from June to August 2024 to determine the pollution load of the Tapung Kiri River in down-lower by analyzing physical, chemical, and biological water quality samples. Water samples were taken triple, including TSS, BOD, COD, Nitrate, Phosphate, and E.Coli parameters. The quality of the Tapung River is compared to the quality standards according to The Regulation of Government of the Republic of Indonesia (RGRI) Number 22/2021 Class III. The results of the analysis of the pollution load were 472.5 kg/day (TSS), 15.75 kg/day (BOD), 94.5 kg/day (COD), 34.44 kg/day (nitrate), and 0.37 kg/day total phosphate. The actual pollution load in the Tapung Kiri River is lower than the maximum pollution load.