Pollution assessment: river Ganga
The diversion of water of River Ganga through Upper and Lower Ganga canals, leaves virtually very little or no flow in the main river. In absence of adequate flow the unabated discharge of treated sewage, even with 100% treatment, and BOD level of 30 mg/l, cannot bring the river water quality to bathing level in lean season flow. To achieve the goal of river water quality minimum flow is required to be maintained throughout the year to support the eco-system in general and all forms of aquatic life in particular and ultimately maintain the wholesomeness of river Ganga. Central Pollution Control Board, in association with the State Pollution Control Boards of Uttarakhand, Uttar Pradesh, Bihar, and West Bengal, has established a monitoring network to quantify water quality of the Ganga and suggests measures for improving the quality. The water quality data collected and collated by Central Pollution Control Board under National Water Quality Monitoring Programme and Assessment of sources of Pollution is presented in this treatise. This report also provides insight to the contribution of pollution from River Kali and River Ramganga.
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