Dr TV Ramachandra, coordinator of the Energy and Wetlands Research Group at the Indian Institute of Science (IISc), has been studying the lakes in Bangalore, especially Bellandur and Varthur, for over two decades. He explains that an estimated 400-600 million litres of untreated sewage is let into the lake catchment every day, creating a toxic environment fertile for disasters like the fires and foam.
“The city overall generates between 1,400 and 1,600m litres per day of untreated sewage,” he says. “20-30m litres per day is generated from the apartments in the vicinity of Bellandur Lake. There are several invasive species like water hyacinths growing in the lake, thick enough to walk on. People dump solid waste on top of it. Because of the thickness, it creates an anaerobic environment in the water below, where methane is formed. It creates an ideal environment for catching fire.”
He believes there are too many agencies governing the lake, so they all blame each other for such incidents. “The Bangalore water supply and sewerage board should be held responsible for letting the untreated sewage into the water,” he says, adding that the onus should also be placed on the Karnataka state pollution control board for not regulating industries that have been draining their untreated sewage into the lake.
Although the Water (Prevention and Control of Pollution) Act and The Air (Prevention and Control of Pollution) Act require action to be taken over such matters, the government has mostly remained silent, while its departments have been passing the buck around. The National Green Tribunal has issued notices to all the agencies involved.
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