Virtual Booth

Water pollution is defined as the contamination of water and presence of harmful substances in water bodies. It can reduce water quality and threaten aquatic life and human health. Water pollution can occur in various water sources including rivers and lakes due to both natural processes and human activities. The existence of these pollutants may lead to negative health outcome. Therefore, this study was conducted to explore the most significant factor that influence water quality in the Langat River Basin
from 2023 to 2024. The study focused on several water quality parameters which are biochemical oxygen demand, chemical oxygen demand, suspended solids, ammonia nitrogen and potential of hydrogen. Ordinal logistic regression was applied to fulfil the research objective. The results indicated that biochemical oxygen demand, chemical oxygen demand, suspended solids and ammonia nitrogen were significant predictors of the classification of water quality. The results revealed that chemical oxygen demand was the most significant factor with a p-value < 0.001 and the largest estimate value of 0.192. It indicates a strong influence on water quality class, indicating polluted water conditions. Chemical oxygen demand is a measure of organic pollution. Higher chemical oxygen demand indicates more pollutants in the river, which reduces water quality. It is hoped that this study will increase public awareness of the impacts of water pollution on the environment and human health.