Q ST QUA TAT ALIT US O TY IN OF W N IN WA NDIA ATER A- 2 R ...

Narayan Bari (3.8 mg/l) & Rudrasagar (3.4 mg/l) in Tripura. The water quality ofLakes, Tanks and Ponds in respective states is meeting the water quality criteriawith respect to Total Coliform and Faecal Coliform except Total Coliform inGanga Pukhuri (21000 MPN/100ml) in Assam and Faecal Coliform in UmiamLake (3800 MPN/100ml) & Ward Lake (3500 MPN/100ml) in Meghalaya. Thewater quality status of Lakes, Tanks and Ponds in Assam, Manipur, Meghalayaand Tripura is presented in Annexure-I Table 19.4.19.6 Water Quality of Lakes and Ponds in Bihar, Jharkhand, Orissa and WestBengalThe respective State Pollution Control Boards carry out the water qualitymonitoring of Lakes and Ponds in Bihar, Jharkhand, Orissa and West Bengal.DO varies from 2.9 mg/l to 20.9 mg/l. The high values of DO observed inTarkeshwar Lake at Hanuman Ghat (20.9 mg/l), Hathishala Ghat (17.9 mg/l) &Mainh Ghat (17.5 mg/l) in West Bengal and Narendra Pokhari (20.6 mg/l),Swetaganga Pond (19.9 mg/l), Markanda Pokhari (17.9 mg/l), Bindusagar Pond(15.3 mg/l) & Indradyumna Pond (15.0 mg/l) in Orissa. DO is observed lowerthan the desired criteria in Parvati Sagar (2.9 mg/l) in Orissa; Dimna Lake (3.3mg/l) in Jharkhand and Rabindrasarovar (3.6 mg/l) in West Bengal whereas allother locations monitored are meeting the required level of DO. Conductivity isobserved higher than the water quality criteria at Chilka Lake in Orissa (48,010µmhos/cm).BOD is observed in the range of 0.2 mg/l to 190 mg/l. BOD is observed higherthan the criteria at all the locations except in Tighi Talab in Bihar and DimnaLake & Topchachi Lake in Jharkhand. The water quality of Lakes, Tanks andPonds in respective states is exceeding the water quality criteria with respect toTotal Coliform and Faecal Coliform except Chilka Lake in Orissa and RanchiLake, Dimna Lake & Topchachi Lake in Jharkhand. The water quality status ofLakes and Ponds in Bihar, Jharkhand, Orissa and West Bengal is presented inAnnexure-I Table 19.5.147