The sustainable management of freshwater resources, as well as the preservation of ecosystems and human health, depend on the evaluation of water quality. However, it can be challenging to assess water quality using a variety of physical, chemical, and biological factors. Many Water Quality Indices (WQIs) that combine several factors into a single numerical number that represents overall water quality have been developed in order to streamline this procedure. The Weighted Arithmetic Water Quality Index, the National Sanitation Foundation Water Quality Index (NSF-WQI), the Oregon Water Quality Index (OWQI), and the Canadian Council of Ministers of the Environment Water Quality Index (CCME-WQI) are all frequently used indices. These indices usually take into account variables including pH, total dissolved solids, nitrates, phosphates, turbidity, dissolved oxygen, and biochemical oxygen demand. Each index evaluates the suitability of water for drinking, irrigation, aquatic life, and recreation using various weighting schemes and mathematical techniques. Researchers, environmental organizations, and policymakers frequently employ water quality indices because they offer a clear and concise depiction of complicated water data. They also support water resource management choices, detect sources of contamination, and track changes in water quality over time and space. WQIs have several drawbacks despite their value, such as reliance on certain characteristics and local environmental circumstances. Therefore, proper assessment of water quality and efficient environmental management require careful selection and modification of suitable indices.