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  1. Maximum permissible concentration of copper in drinking water in mg/L is

    2. A.

     0.01
    B.

     0.05
    C.

     1.0
    D.

     2.0

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    Answer : Option C

    Explanation :

    The 1959 WHO International Standards for Drinking Water suggested that concentrations of copper greater than 1.5 mg/litre would markedly impair the potability of the water. However, in the first edition of the Guidelines for Drinking Water Quality, published in 1984, a guideline value of 1.0 mg/litre was established for copper, based on its laundry and other staining properties.

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