SUMMARY Ogan River located in Ogan Komering Ulu Regency, South Sumatra Province with a length of ± 170 km and 50 m wide with water discharge reaching 136,614 m/hour. Although the upstream of Ogan River has a natural environmental hue with many secondary forests and hilly areas, it doesn’t rule out the possibility of stress on the aquatic environment because the upstream of Ogan River is ofte…