There are various natural sources of water on the earth such as ponds, rivers, lakes, rain, glaciers, oceans, and wells.
- River Water – The river gets water from the melting of snow lying on the peaks of mountains or from the rain water which reaches them through many small and big drains. The various impurities present in river water are dissolved salts, dust, sand, some micro-organisms such as bacteria, and straw particles. The river water also contains effluents which are discharged into the river by the factories. The suspended solid particles are present in the river water are harmful to all the living organisms including man.
- Rain Water – The rain water is considered to be the purest form of natural water because it is usually free from any impurities. It is formed by the condensation of water vapor present in the cloud. When the rain water comes down to…
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