Abstract
The goal of this research was to analyze the water quality and nutrient content in the Belawan River. Activities done by the community such as industries, PLTU, PDAM and aquaculture are found in Belawan River area. This action produce waste straightly discharged into river water, emerging several bad effect on water quality and nutrient content. Retrieval of data with Purposive Random Sampling with five analyses the location. Analysis in the form of measurements of water quality that are temperature, pH, depth, light intensity, light penetration, flow speed, dissolved oxygen (DO), BOD5 and the measurement of nutrient content, which are nitrate, phosphate and nitrogen. The results of water quality measurements indicated that temperature, light penetration, light intensity, flow speed, and depth are still within the water quality standard while pH and BOD5 have passed the water quality standard. Based on nitrate concentration, it is included as eutrophic and mesotrophic waters (1.18 - 7.57 mg/L). Based on phosphate concentrations, it is included as hypertrophic (0.14 - 0.18 mg/L,). Based on nitrogen concentration, it is included as eutrophic and mesotrophic waters (1.54 - 10 mg/L).
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