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: 14/01/2021 Sample Time: 14:30 Hrs  
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 slightly Turbid Odour: None Visible effluent discharge: one


Water Quality
Parameter Test Result Unit
  Conductivity   63.70   µs/cm
  COD   36.00   mg/l
  Fluoride   BDL   mg/l
  Magnesium   4.03   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.016   mg/l
  Potassium   0.80   mg/l
  Sodium   0.90   mg/l
  Sulphate   3.43   mg/l
  Total Alkalinity   30.00   mg/l
  Total Dissolved Solids(TDS)   44.00   mg/l
  Total Fixed Solids(TFS)   30.00   mg/l
  Total Hardness as CaCo3   30.00   mg/l
  Ammonia-N   0.13   mg/l
  BOD   1.60   mg/l
  Dissolved O2(DO)   6.80   mg/l
  Fecal Coliform   2200   MPN/100ml
  Nitrate-N   0.110   mg/l
  Total Suspended Solids(TSS)   42.00   mg/l
  Turbidity   22.20   NTU
  pH   7.0   Unit
  Temperature(Water)   24   ⁰C
  Total Coliform   7000   MPN/100ml
  Boron   0.24   mg/l
  Calcium   6.41   mg/l
  Chloride   0.97   mg/l