Water Quality refers to the chemical, physical and biological characteristics of water that determine its suitability for a particular purpose or use. It includes factors such as pH levels, dissolved oxygen content, temperature, salinity, turbidity, bacterial count, and presence of pollutants like heavy metals, pesticides, and chemicals. Water quality is essential to ensure that water resources are safe for human consumption, agricultural use, industrial processes, aquatic life support, recreational activities, and other purposes. Maintaining good water quality helps prevent the spread of diseases, supports healthy ecosystems, and ensures sustainable development.