Why Bengaluru’s Lakes Should Not Become Storage Tanks for Treated Sewage The case for protecting lakes as living ecosystems, not simply as places to dispose of wastewater Bengaluru is a city built around water. Long before it became a sprawling metropolis, its lakes, tanks, wetlands and interconnected rajakaluves formed a carefully adapted hydrological system. Lakes captured monsoon rain, slowed runoff, stored water, supported biodiversity and, in many places, helped replenish groundwater. Today, however, many of these lakes face a very different future. As the city struggles with the enormous challenge of collecting and treating its wastewater, a solution that often appears attractive is to treat sewage in a Sewage Treatment Plant (STP) and release the treated water into a nearby lake. At first glance, this seems like a win-win proposition. Sewage is treated, the lake receives water and remains full throughout the year. But the question we need to ask is more fundamental: Does a lak...
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