Study of Water Quality Status of Dendam Tak Sudah Lake in Bengkulu City, Indonesia: Using CCME Index

Abstract

Dendam Tak Sudah Lake (DDTS), located in Bengkulu City, is the largest lake that has a vital role in the hydrological system of the area. Along with economic and regional development, this lake faces threats, especially the decline in water quality. This study aimed to determine lake water parameter characteristics and its quality status. The study used the lake water dataset monitoring obtained from the Environmental Service of Bengkulu City, which measured four observation points from May 2017 to March 2019. There were 17 parameters observed in this study and compared with Class I of lake water quality standards based on Government of Indonesia Regulation Number 22 Year 2021. The lake water quality status was analyzed using the water quality index of CCME. The analysis results show that the lake water quality index ranges between 44.64-56.72, so the status of lake water is included in the poor and marginal categories. Furthermore, the parameters that still meet the lake water quality standards are: temperature, TDS, TSS, pH, Fe, Sulfate, Mn, Cu, DO, Oil and greases, and detergent. In contrast, the remaining 6 parameters were detected to exceed the lake water quality standard: Zn, BOD, COD, Phosphate, total coliform, and fecal coliform.