Pollution Index Analysis and Water Pollution Control Strategy in Berenyok River, Tanjung Karang, Mataram City

Berenyok river is one of the water sources in Tanjung Karang, Mataram city, categorised as Class 2 for its designation. Thus, preserving quality crucial. This study aims to determine quality, calculate Pollution Index (PI), and set control strategies river. The uses quantitative methods such laboratory analysis PI calculation using a formula based on Decree Minister Environment No.115/2003 determining status. Meanwhile, Strengths, Weakness, Opportunities, Threats (SWOT) generates recommendations pollution strategies. sampling locations are located two points (upstream downstream river) during bright daylight river's normal flow. Based results, defined lightly polluted concentrations several chemical parameters exceed maximum limit, BOD, PO3-P. It also verified by high concentration total coliform, namely 540,000 MPN/100mL (upstream) 1,600,000 (downstream). substantial