water pollution

Available water resources are degrading rapidly .the major rivers of the country generally retain better water quality in less densely populated upper stretches in hilly areas .plain river water is used intensively for irrigation ,drinking ,domestic and industrial purposes .the drain carrying agricultural fertilizers and insecticides ,domestic solid and liquid wastes and industrial effluents join the rivers the concentration of pollutants in river especially remains very high during summer seasons when flow of water is low.

 the central pollution control board (PCB)in collaboration with state pollution control board has been monitoring water quality of national aquatic resources at 507stations .the data obtained from these stations show that organic and bacterial contamination continues to be main source of pollution in rivers .the ground water pollution has occurred due to high concentration of heavy /toxic metals. fluoride and nitrates at different parts of world .

                                                                     REFERANCE: NCERT