also has a lot of fish and other aqua animal. The presence of animals may lead to rise in nitrate levels. The abnormal presence of heavy metals in the flora and fauna of the locality and its ill effects on other corresponding activities has been observed. The statistical observations are as follows: Average Hydraulic loading in the fish ponds is 259 cum/ ha/day , with corresponding average Biological Oxygen Demand (BOD) loading of 22 kg/ha/day. Reductions in concentrations of Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD) and Total Suspended Solids (TSS) were observed as : BOD - 86 to 5 mg/l COD - 256 to 17.9 mg/l TSS - 208 to 40 mg/l Table 6.11: Concentration of heavy metals in the sediments in the fisheries of East Kolkata Wetlands Zn Cr Pb Cd DWF Channel 607.5 291.4 165.05 23.05 Fish Ponds 215.48 106.58 83.74 11.68 Table 6.12: Concentration of heavy metals in the water of the fisheries of East Kolkata Wetlands Zn Cr Pb Cd CHACHCHARIA Feeder Channel 0.18 0.04 0.04 0.008 2nd Pond 0.069 <0.01 <0.02 <0.002 3rd Pond 0.045 <0.01 <0.02 <0.002 4th Pond 0.077 0.023 0.02 <0.002 Final Outlet 0.04 <0.01 <0.02 <0.002 NALBAN 6.21 | City Development Plan of BMC-2018c2:T7b2,Environment an Tourism Feeder Channel 0.18 0.04 0.04 0.004 Small Pond 0.075 <0.01 <0.02 <0.002 Big Pond 0.075 <0.01 <0.02 <0.002 Final Outlet 0.075 <0.01 <0.02 <0.002 Table 6.13: Concentration of heavy metals in fishes in the fisheries of East Kolkata Wetlands Species Part Maximum Quantum of Heavy Metals American Ruhi Gill 179.20 mg/kg Ruhi Liver 1.91 mg/kg Mregal Gill 2.67 mg/kg Ruhi Gill 0.21 mg/kg 6.8.5 Inferences/conclusion  At Duttabad area a lot of waterbodies has been embanked with masonry. That disrupts the ecosystem and symbiosis of the living being with the waterbodies. This should be prevented to happen further.  The waterbodies are used for bathing purposes, cloth washing and also disposal of soil waste. This leads to a lot of pollution and