Question raised in Lok Sabha on Polluted Rivers, 12/12/2019. Central Pollution Control Board (CPCB) in association with the State Pollution Control Boards (SPCBs)/ Pollution Control Committees (PCCs) monitors the water quality of rivers on a regular basis across the country through a network of monitoring stations. As per latest report of CPCB, 351 polluted river stretches have been identified on 323 rivers based on the value of Bio-chemical Oxygen Demand (BOD). State-wise & priority-wise number of polluted river stretches is provided in Annexure.