Endang Yuli Herawati, Ekwan Nofa Wiratno, Pratama Diffi Samuel, Iftitah Farah Zannuba, Chandika Lestariaji, Rahmi Valina, Misbakhul Munir, Ruly Isfatul Khasanah
Anthropogenic activities in river basins can significantly degrade water quality through the introduction of pollutants into aquatic systems. The Welang, Gembong, and Rejoso Rivers in Pasuruan Regency serve as important water resources for local communities but are increasingly subjected to environmental pressures. This study seeks to assess the water quality status of these rivers based on physicochemical parameters to support water resource management. The research was conducted from November 2025 to January 2026 using a survey method with purposive sampling across several observation stations. Parameters analyzed included temperature, current velocity, total suspended solids (TSS), pH, dissolved oxygen (DO), nitrate, orthophosphate, chemical oxygen demand (COD), biological oxygen demand (BOD), total organic matter (TOM), and Pb. Water quality status was determined using the STORET method based on Class III standards (Government Regulation No. 22 of 2021). The results showed that orthophosphate, BOD, COD, and Pb exceeded the permissible limits at multiple sites. STORET index values classified all rivers as heavily polluted, with scores of-44 (Welang),-36 (Gembong), and-48 (Rejoso). These patterns reflect substantial anthropogenic pressures that surpass the assimilative capacity of the rivers, indicating an urgent need for integrated pollution control and sustainable water resource management to maintain ecosystem function and support continued utilization. © 2026, Egyptian Society for the Development of Fisheries and Human Health. All rights reserved.
Faculty of Fisheries and Marine Sciences, Universitas Brawijaya, Jl. Veteran, East Java, Malang, 65145, Indonesia; Polytechnic of Marine and Fisheries Sorong, Southwest Papua, Sorong, Indonesia; Aquaculture Study Program, Bangka Belitung University, Bangka, 33172, Indonesia; Marine Science Program, Faculty of Science and Technology, State Islamic University of Sunan Ampel, East Java, Surabaya, Indonesia
