Wastewater is the water that is unfit for human consumption. Most of the wastewater comes from domestic, agricultural and industrial sources. Incomplete and improper treatment of wastewater results in several environmental and health problems. Effluents from wastewater systems are released into ponds, lakes, rivers, seas and oceans. Wastewater contains a wide range of pollutants like decaying organic matter, ammonia, phosphorus, chlorine, etc. These pollutants are responsible for the eutrophication of water bodies that leads to the death of fish and other aquatic organisms. The dumping of wastewater into rivers also results in many potentially fatal infections like cholera, typhoid, etc. Recent studies also indicate that the increased water temperature increases the concentration of toxins present in water bodies.