Marinda, P., Astuti, A., Agusman, A., Estyvianita, E., Novilasari D., & Maryani, S. (2025). Water Quality Study of Rambang, Kelekar, and Keramasan Rivers in Ogan Ilir Regency. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-13 Tahun 2025, Palembang 20 Oktober 2025. (pp. x–y). Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).Increasing development activities in Ogan Ilir Regency have the potential to degrade river water quality due to pollution from domestic and industrial waste. This study aimed to assess the water quality conditions and determine the quality status of the Keramasan, Kelekar, and Rambang Rivers based on applicable quality standards. Water quality was analyzed using a quantitative descriptive method through grab sampling at upstream and downstream points of each river, which were then tested for physical and chemical parameters, with the water quality status determined using the STORET method in accordance with Government Regulation No. 22 of 2021. The analysis revealed several dominant parameters exceeding the class I quality standard thresholds, including Dissolved Oxygen (DO), total hardness, sulfide, and E. coli. Based on the STORET method calculation, the three rivers were classified with a "Moderately Polluted" quality status, which correlates with the domestic activities of communities along the riverbanks. The water quality in the Keramasan, Kelekar, and Rambang rivers has experienced moderate pollution, These findings highlight the urgent need for integrated watershed management to mitigate domestic pollution impacts.