One of the prime lakes in the City, Sankey Tank, too faces the threat of increasing pollution and encroachment. The government claims that Sankey Tank is a model lake but in reality, it is highly polluted, shows a report published by Centre for Environmental Studies, Indian Institute of Science. The report points out that if the lake is not restored soon, it will become like Varthur lake, which recently frothed and burnt. The report titled ‘Sankey lake: waiting for an immediate sensible action’ was released earlier this month. Since then many residents and resident welfare associations have been expressing their concern over the increasing pollution levels and encroachment threat pointed in the report.