Water is an indispensable resource and crucial to sustaining life. Water scarcity is one of the largest threats all over the world. The growing population, rapid industrialization as well urbanization discharges wastewater. The wastewater presents various pollutants like biological agents, heavy metals, dyes, phenols, pesticides as well as dissolved or non-dissolved chemicals. Wastewater treatment is one of the most important solutions to reuse the water. The wastewater consists of physical, chemical, and biological characteristics. Several parameters are involved to check water quality. The three distinct types of water quality parameters like physical, chemical as well as biological parameters. Several physicochemical methods and technologies are recently used in wastewater treatment. The treatment of wastewater protects human health and reduces the amount of waste that is generally released into the environment and improves environmental health. Wastewater is one of the most essential reliable sources of irrigation water for several farmers. The most general sources of marginal quality water are Agricultural drainage water, Municipal and Industrial wastewater as well as shallow groundwater. Wastewater reclamation and reuse are imperative for the future. The important role of wastewater reclamation is saving the sustainable environment. The reclaimed water is used for various purposes like irrigation, gardening, cooling system, toilet flushing, cooling of air conditioning system, and several other uses.