Monsoon poses threat of drinking water contamination in Tiruchi

The Tiruchi Corporation has stepped up measures to prevent water contamination as intermittent rainfall over the past few days after the onset of northeast monsoon has led to waterlogging in several parts of the city, including residential localities.

With streets inundated and groundwater levels rising, the risk of contamination of open wells and borewells has increased, prompting the civic body to intensify its steps to prevent outbreak of waterborne diseases.

Teams of sanitation and health officials are inspecting the drinking water supply network, collecting samples, chlorinating the water, and regularly monitoring chlorine levels to ensure the quality of water supplied to residents.

“At present, 1 ppm (parts per million) of chlorine is added to the water for disinfection. Drinking water pipelines and pit taps are being cleaned and monitored regularly. Superchlorination will be carried out if necessary,” said M. Karthikeyan, City Health Officer.

The city has around 150 overhead water tanks (OHTs) that store drinking water pumped from various sources. Officials have been instructed to clean the tanks and their valve pits once every week and monitor the quality of drinking water supplied at the ward level on a daily basis.

In areas where underground drainage work is under way, officials have been directed to inspect drinking water distribution lines to identify and prevent possible contamination.

Water samples are being collected from densely populated and congested localities and sent for testing three times a week. Officials are regularly inspecting tail-end distribution points to ensure the safety of the water supply.

Pit taps are receiving particular attention as water accumulation during rainfall can create conditions conducive to mosquito breeding. Waterlogging and reverse flow of contaminated water can cause discolouration and foul odour in the drinking water supply, Dr. Karthikeyan said.

Issues relating to water contamination are being addressed and complaints from residents are being attended to promptly, he added.