Abstract
Climate change has a negative impact on surface water quality. This is influenced by the increase in human activities in the use of water. The resulting water output is discharged directly into water bodies and can increase the pollutant load of river water. One of the recipients of the burden of surface water pollution is the Larangan/Premulung River, which is indicated to have decreased quality due to liquid waste originating from domestic, industrial, and agricultural activities. The purpose of this study was to determine the load carrying capacity of water pollution in the Larangan River in the upstream, middle, and downstream parts. The water samples taken amounted to 10 sample points. The data was collected in the form of physical parameters (flow rate, water temperature, and TSS) and chemical parameters (pH, COD, BOD, and DO). The method of calculating the carrying capacity of the pollution load uses the mass balance method. Data analysis used quantitative descriptive analysis. The results showed that the carrying capacity of the Larangan/Premulung River pollution load: (1) the upstream part could no longer accept the pollutant load in the moderate to the heavy category in the quality standard class II; (2) the middle and downstream parts for COD and BOD parameters are no longer able to accept the pollutant load in the medium to large category.
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