Water is a pure form of liquid available on earth for drinking purposes. Significantly it is not only used for drinking but also for other activities. Water is a transpare nt, colorless liquid which serves as the main constituent of about 70% of the earth. It is available in three states, solid as ice, liquid as water and gas as water vapor. It is the most essential form of liquid required not only by humans but by every organism living on this planet. Water on earth continuously moves through cycle of evaporation and condensation. Since every organism is greatly dependent on water to live we all need to ensure the water we consume is safe for drinking. Be it tap water or bottled water every type has contaminants in them. The water available in the water tap is treated at water treatment plants.it is purified according to certain regulations and then sent to each one’s tap. After all this there are still harmful contaminants present in water. The contaminants can be anything fr