What are the substances which make water unfit for drinking which we get from local supply?

Discussion in 'CBSE Class 7 Science Help' started by g mahesh, Nov 11, 2013.

  1. g mahesh

    g mahesh Member

    The local water is hard due to the presence of calcium and magnesium chlorides, sulphates and bicarbonates. It also contains dust particles and micro-organisms which make water polluted. Therefore, such type of water is not suitable to drink and use. Such water must be treated before use.

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