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: 23/07/2021 Sample Time: 13:25  
Human Activities: None Weather: Sunny and humid Water Body: Coochbihar lake
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Moderately green and turbid Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Total Alkalinity   76.00   mg/l
  Total Dissolved Solids(TDS)   28.00   mg/l
  Total Fixed Solids(TFS)   28.00   mg/l
  Total Hardness as CaCo3   36.0   mg/l
  Total Suspended Solids(TSS)   14.00   mg/l
  Turbidity   9.58   NTU
  Ammonia-N   BDL   mg/l
  BOD   1.70   mg/l
  Conductivity   42.73   µs/cm
  Dissolved O2(DO)   6.90   mg/l
  Fecal Coliform   2300   MPN/100ml
  Nitrate-N   0.06   mg/l
  pH   7.23   Unit
  Temperature(Water)   29   ⁰C
  Total Coliform   5000   MPN/100ml
  Boron   0.64   mg/l
  Calcium   9.62   mg/l
  Chloride   17.61   mg/l
  COD   16.00   mg/l
  Fluoride   BDL   mg/l
  Magnesium   3.46   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.005   mg/l
  Potassium   0.08   mg/l
  Sodium   2.00   mg/l
  Sulphate   4.06   mg/l