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: 23/10/2019 Sample Time: 14:10  
Human Activities: Bathing, Washing. Weather: Sunny and Hot Water Body: Coochbihar lake
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Moderately Brown Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   BDL   mg/l
  BOD   1.40   mg/l
  Conductivity   58.70   µs/cm
  Dissolved O2(DO)   6.90   mg/l
  Fecal Coliform   2200   MPN/100ml
  Boron   0.004   mg/l
  Calcium   7.21   mg/l
  Chloride   19.57   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.019   mg/l
  Potassium   BDL   mg/l
  Sodium   1.00   mg/l
  Sulphate   9.04   mg/l
  Total Alkalinity   42.00   mg/l
  Total Dissolved Solids(TDS)   72.00   mg/l
  Total Fixed Solids(TFS)   42.00   mg/l
  Total Hardness as CaCo3   38.00   mg/l
  Total Suspended Solids(TSS)   42.00   mg/l
  Turbidity   3.52   NTU
  Nitrate-N   0.31   mg/l
  COD   24.00   mg/l
  Fluoride   BDL   mg/l
  Magnesium   5.76   mg/l
  pH   7.60   Unit
  Temperature   30   ⁰C
  Total Coliform   8000   MPN/100ml