Resource detail

The water quality data on rivers, lakes, ponds, tanks and groundwater locations being monitored under the network is evaluated against the water quality criteria and the monitoring locations in exceedence with respect to one or more parameters are identified as polluted and require action for restoration of water quality. The locations on rivers, lakes, ponds, tanks and groundwater not meeting the criteria are summarized briefly in this chapter. The monitoring results obtained during 2012 indicate that organic pollution continues to be the predominant pollution of aquatic resources.The organic pollution measured in terms of biochemical oxygen demand (BOD) & Coliform bacterial count gives the indication of extent of water quality degradation in different parts of our country. It is observed that nearly 63% of the observations are having BOD less than 3 mg/l, 19% between 3-6 mg/l & 18% above 6 mg/l. Similarly Total & Faecal coliform which indicate presence of pathogens in water are also a major concern. About 50% observations are having Total Coliforms and 65% observations are having Faecal Coliform less than 500 MPN /100 ml.