The National Water Quality Standards (NWQS) for Malaysia use a range of physical, chemical, and biological parameters to assess water quality. The water quality standards mainly set by the Department of Environment (DOE). The DOE monitors the quality of natural water bodies using a network of monitoring stations across the country. Regulatory frameworks and these water quality data helps inform policy and management decisions related to conservation, pollution control, and ecosystem health, ensuring that the standards are met and enforced, contributing to the sustainable management of water resources.