Central Water Commission (CWC) has published a report on river pollution by Heavy metals. The study was conducted from May 2014 to April 2018 and spanned 67 rivers in 20 river basins.
About:
Samples taken from 65% of the water quality stations spanning India’s major rivers showed contamination by one or more heavy metals, exceeding safe limits set by the Bureau of Indian Standards.
Iron emerged as the most common contaminant with 156 of the sampled sites registering levels of the metal above safe limits. The other major contaminants found in the samples were lead, nickel, chromium, cadmium and copper. None of the sites registered arsenic levels above the safe limit.
The main sources of heavy metal pollution are mining, milling, plating and surface finishing industries that discharge a variety of toxic metals into the environment.
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