The effect of industrial waste on the water quality of Padang River in the industrial area of Tebing Tinggi

Padang River is one of the rivers in Tebing Tinggi Municipality which is used as a source of raw water used by local water supply company (LWSC) Tirta Bulian, Tebing Tinggi. This river flows through residential areas, factories and sand dredging. With this activity, the waste is immediately disposed of into the water body, causing a negative impact on the quality of its waters. This study aims to analyze the quality of Padang River water in the industrial segment as a result of the influence of the pollution load by industrial wastewater with indicators of BOD, COD, TSS, DO, temperature and pH. The research method used descriptive analysis with a quantitative approach to the condition of river water quality. Wastewater generated from the activities of the three industries contributed to the potential actual pollution load of the Padang River in the form of BOD, COD and TSS values of 6.9 kg/day, 19.19 kg/day and 6.11 kg/day, respectively. The existence of a fairly large difference in discharge between the rainy and dry seasons also affects the water quality of the Padang River. In general, water quality during the rainy season is better than during the dry season.