Question raised in Lok Sabha on Discharge of Effluents into Lakes, 03/05/2016. According to National Wetland Inventory Atlas published by the Space Application Centre, Ahmedabad in 2011, there are a total of 7,57,060 wetlands, including lakes and other water bodies, in the country. However, no specific inventory of lakes in and around the 46 metropolitan cities (as per 2011 Census) has not been prepared. A few lakes in and around metropolitan cities have been impacted due to disposal of partially/untreated sewage and industrial effluents.