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Q. |
Maximum permissible concentration of copper in drinking water in mg/L, is – |
A. | 0.01 |
B. | 0.05 |
C. | 1.0 |
D. | 2.0 |
Answer» C. 1.0 | |
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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