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  • Water is essential for life.
  • About 71% of the earth’s surface is covered with water. It is present as ground water, in seas, oceans, rivers, lakes, ice caps, and in atmosphere.
  • Wells, rivers, ground water reservoirs or lakes are sources of fresh water.
  • Ocean and sea water is not potable because they contain large amount of dissolved salts.
  • Water is a necessity for every form of life. It is used for domestic activities, irrigation, industrial purposes, etc.
  • 22nd March is celebrated as World Water day.



  • Sources of water: The common sources of water are ponds, lakes, rivers, wells, and reservoirs…

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