Water Quality Evaluation System to Assess the Brantas River Water

Water quality degradation in the Brantas’ river will increase from the year to year due to increasing of the wastewater production as well as forests and land degradations resulting from population growth, urbanization and economic and industrial developments. Assessment of river water pollution is usually conducted by a comparison between the effective water quality and the standards regulated by law. The formulation of the water quality standards are commonly considered either the water utilization purposes or the water quality degradation. The water quality evaluation system (WQES) is used to evaluate the available water condition that distinguishes into two categories i.e., the water quality index (WQI) and water quality aptitude (WQA). The assessment of the Brantas river water quality from five selected stations was found that the WQI situates in the very bad class and the WQA ranges from most suitable quality for agriculture uses to unsuitable for leisure and sport activities.