Water Quality Analysis of Benanga Reservoir, in Samarinda, East Kalimantan, Indonesia

Abstract

Benanga reservoir has functions as a flood controller in Samarinda. It also for used water treatment intake. Surface condition of the reservoir is currently covered by aquatic plants and sedimentation occurs. Many people live on the edge of the reservoir and dispose of their household waste in the reservoir and use reservoir to fish cages. Purpose this study was to measure water quality of the reservoir and compared with the standard of district regulation, East Kalimantan Regional Regulation No. 02 / 2011 concerning management of water quality and water pollution control. Sampling point were 5 locations by purposive sampling. The location is crowded with aquatic plants (1), near cages (2), locations where there were no aquatic plants and cages (3), reservoir outlets (4) and water treatment intake (5). Sampling is done by composite. Samples were analyzed in the laboratory and compared to the standard. Result of the study obtained an average of pH 5.3; temperature of 28oC; DO 3.23 mg/L; BOD 18.43 mg/L; COD 26.27 mg/L; TSS 13.28 mg/L; Nitrite 0.0042 mg/L; Nitrate 0.2 mg/L; Ammonia 0.3214 mg/L; Phosphate 0.0105 mg/L and Fecal Coliform 392 MPN/100mL. Parameters of pH, DO, BOD, COD, Fecal Coliform exceeding the standard and temperature, TSS, Nitrite, Nitrate, Ammonia, Phosphate meet the standard.