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: 24/01/2020 Sample Time: 14:20 Hrs  
Human Activities: Bathing and Washing. Weather: Clear and Sunny Water Body: Coochbihar lake
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Light Green and Clear. Odour: Fishy Visible effluent discharge: None.


Water Quality
Parameter Test Result Unit
  Calcium   9.62   mg/l
  Chloride   19.57   mg/l
  Nitrate-N   0.77   mg/l
  COD   23.00   mg/l
  Fluoride   0.12   mg/l
  Magnesium   3.46   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  pH   7.50   Unit
  Ammonia-N   BDL   mg/l
  Dissolved O2(DO)   7.20   mg/l
  Sodium   0.60   mg/l
  Sulphate   15.67   mg/l
  Total Alkalinity   36.00   mg/l
  Total Dissolved Solids(TDS)   68.00   mg/l
  Total Fixed Solids(TFS)   16.00   mg/l
  Total Suspended Solids(TSS)   48.00   mg/l
  Turbidity   4.75   NTU
  Conductivity   46.21   µs/cm
  Fecal Coliform   2200   MPN/100ml
  Temperature   19   ⁰C
  Total Coliform   7000   MPN/100ml
  Boron   0.88   mg/l
  BOD   1.20   mg/l
  Phosphate-P   0.016   mg/l
  Potassium   1.1   mg/l
  Total Hardness as CaCo3   38.00   mg/l