The water quality is monitored by the Central Pollution Control Board (CPCB) in association with the concerned State Pollution Control Boards (SPCBs) and Pollution Control Committees (PCCs) for Union Territories across the country at 2500 stations, including 1693 stations for surface water under National Water Monitoring Programme (NWMP). As per available data for 2016, 55% observations conform to criteria related to Biological Oxygen Demand (BOD), 44% to total coliform and 60% to faecal coliform.
Source: http://www.indiaenvironmentportal.org.in