IJEP 41(7): 834-840 : Vol. 41 Issue. 7 (July 2021)
Dibrugarh University, Dibrugarh, Assam, India
An assessment of river water affected by oil refinery effluent was carried out by biological water quality criteria (BWQC) of macroinvertebrate (organisms retained by mesh sizes of ~200-500 mm) community of 2 rivers Dhansiri and Kaliani of Golaghat distrist of Assam. A total of 35 families of macroinverterbate were recorded during the study period. The point of effluent discharge showed heavy pollution with the water quality class D and all the control stations of upstream showed water quality class B indicating slight pollution, whereas the downstream of contaminated area of the 2 rivers showed water quality class C indicating moderate pollution.
Assam, Community, Effluent, Macroinverterbate, Pollution, Refinery
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