Water quality monitoring is the process of regularly checking the physical, chemical, and biological characteristics of water. This helps ensure that water is safe for drinking, swimming, and supporting aquatic life. Common parameters measured include pH, dissolved oxygen, and levels of contaminants like heavy metals or bacteria. Monitoring can be conducted using various methods, including field tests and laboratory analysis. Organizations such as environmental agencies often carry out these assessments to protect public health and the environment. Regular monitoring helps identify pollution sources and track changes in water quality over time.