Total phosphate is composed of orthophosphate, polyphosphate and organic phosphorous. Phosphorous in water mostly exists in the form of phosphate which is the essence of soil nutrients and animal and plant bioplasm. Phosphorous is an important nutrient for growing plants. Excessive phosphorous existing in bodies of water will cause mass reproduction of algae and death of other organisms. Moreover, the decay and decomposition of algae would deplete the dissolved oxygen in the water and lead to eutrophication.Water total phosphate s is commonly expressed as milligrams of phosphorus per liter of water (mg/L of P).