June, and its monthly variation showed highly adverse effect on river Ganga due to tanneries effluent. It is found that significant positive correlation holds for Temp vs BOD GH1 (r= 0.99, p<0.01), EC vs chloride GH6 (r=0.877, p<0.01), EC vs TDS GH6 (r=0.836, p<0.01); and TA vs DO GH1(r=0.842, p<0.01), pH vs Mg GH6