But two years down the line, little has changed. A couple of teams from UK and Israel that were called in by the state government, have come on a recce and given their recommendation on lowering the pollution. But the implementation has hit a roadblock, as opinion is divided on whether national or international agencies will be put in charge of the programme.
In February, a fire had started in the lake, triggering anger from the locals. Environmentalists say the froth is due to the huge amount of pollutants, toxic chemicals and untreated sewage, poured into the 4 square km lake from local factories.
The police had blamed the fire on garbage dumped in it. Residents of the apartment buildings that line the lake say garbage and weeds are regularly burnt in the area.
The two major lakes of Bengaluru, Bellandur and Varthur, have been ruined because of the constant dumping of toxic wastes from small factories. The area around both smell foul and the dirty froth have been accumulating in both since 2013.