West Bengal Pollution Control Board

Siliguri Laboratory

Paribesh Bhawan, Paribahan Nagar, P.O. Matigara, Siliguri,Darjeeling 734 428.



Station: KOCHBIHAR LAKE (SAGAR DIGHI) River Basin: Raidak_Torsa CPCB Station Code: 2519
Sample Date: 23/05/2022 Sample Time: 14:00  
Human Activities: None Weather: Sunny and Clear. Water Body: Coochbihar lake
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Light Green and turbid Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   0.17   mg/l
  BOD   2.20   mg/l
  Conductivity   61.87   µs/cm
  Dissolved O2(DO)   8.20   mg/l
  Fecal Coliform   5000   MPN/100ml
  Nitrate-N   1.44   mg/l
  pH   7.57   Unit
  Temperature(Water)   28   ⁰C
  Total Coliform   11000   MPN/100ml
  Boron   2.42   mg/l
  Calcium   6.40   mg/l
  Chloride   1.95   mg/l
  COD   23.00   mg/l
  Fluoride   BDL   mg/l
  Magnesium   6.80   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.003   mg/l
  Potassium   0.70   mg/l
  Sodium   1.80   mg/l
  Sulphate   3.26   mg/l
  Total Alkalinity   34.00   mg/l
  Total Dissolved Solids(TDS)   37.00   mg/l
  Total Fixed Solids(TFS)   74.00   mg/l
  Total Hardness as CaCo3   44.00   mg/l
  Total Suspended Solids(TSS)   17.00   mg/l
  Turbidity   3.49   NTU