Question raised in Lok Sabha on Eco-system of Rivers, 14/03/2017. The Central Pollution Control Board (CPCB) along with State Pollution Control Boards (SPCBs) monitors the river water quality across the country through a network of 1275 monitoring stations on various rivers under the National Water Quality Monitoring Programme (NWQMP). As per the report published by Central Pollution Control Board (CPCB) in February 2015, 302 polluted river stretches have been identified on 275 rivers based on Bio-chemical Oxygen Demand (BOD) levels, a key indicator of organic pollution. The State-wise details are at Annexure-I. The details of rivers covered under NRCP, State-wise is given at Annexure-II.