By:M.S.Yatnatti: Editor and Video Journalist Bengaluru:Let Government construct concrete compound wall for total lake and stop sewage water entering lake. Reportedly Bellandur Lake is B'luru's biggest septic tank.The city's biggest lake has become its largest septic tank and the blame goes to the government and civic agencies, which have failed to discharge their duties, a commission appointed by the National Green Tribunal (NGT) has concluded in its report . The panel made the observations in its report prepared after inspection of three lakes, including Bellandur, the largest and most polluted in Bengaluru. Lambasting the government and civic agencies, the report has described how encroachments and dumping of waste and sewage continue to haunt Bellandur Lake. There is not even 1ml of clean water in the lake, it added. The report submitted to the NGT on May 31 attributed the sorry state of Bellandur Lake, which frequently spews froth and fire, to the sheer callousness and indifference of the authorities. The report states that the lake's water-holding capacity has shrunk due to the dumping of garbage and construction waste, among other things.Hydrophytes and microphytes in the water are also causing trouble, it reportedly says.