Ranchi lake, popularly known as Bada Talab, earlier happened to be a popular tourist spot in the town. But now, the giant lake has receded behind human settlements. Plastic bags carrying household wastes and left-overs from Puja offerings are dumped on the lake almost every day. The biggest water body of the city is also a home to water hyacinth that starves the water of oxygen and ends up killing the fish.But the biggest polluting factor is the domestic sewage dumped every day. Ranchi lake, located in the heart of the city, was excavated by Colonel Onsley, a British agent in the year 1842. Spread over an area of 52 acres, earlier people used to drink water from this lake several years ago, but today the lake has become so contaminated that it has become a home for several contagious diseases like diarrhea and other water-borne diseases.