Devaki said, “Despite numerous complaints made to the Chennai Metropolitan Water Supply and Sewerage Board over mixing of sewage with drinking water, no action was taken to prevent it yet. The civic body should take up the important issue with the officials of the metro water in this regard to avoid occurrence of killer epidemic in the areas.”

Refuting her charges, Mayor M Subramanian said that no cases of cholera were reported in CDH. “Most of the people, who were admitted in CDH, found with complaints of diarrhoea after consuming water which contained excess of chlorine,” he said.