West Bengal Pollution Control Board

Siliguri Laboratory

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



Station: River Torsa D/S of Ghughumari River Basin: GANGA CPCB Station Code: 4719
Sample Date: 23/03/2021 Sample Time: 14:10 Hrs  
Human Activities: Fishing Weather: Sunny Water Body: Torsa
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 0.00 m 
Color & Intensity: Light Green and Slightly Turbid Odour: None Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   BDL   mg/l
  BOD   1.40   mg/l
  Conductivity   94.65   µs/cm
  Dissolved O2(DO)   7.40   mg/l
  Fecal Coliform   2700   MPN/100ml
  Fecal Streptococci   20   MPN/100ml
  Nitrate-N   0.06   mg/l
  pH   7.42   Unit
  Temperature(Water)   25   ⁰C
  Total Coliform   8000   MPN/100ml
  Boron   0.87   mg/l
  Calcium   21.64   mg/l
  Chloride   0.98   mg/l
  COD   46.00   mg/l
  Fluoride   BDL   mg/l
  Magnesium   13.24   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.002   mg/l
  Potassium   1.0   mg/l
  Sodium   2.5   mg/l
  Sulphate   10.58   mg/l
  Total Alkalinity   76.00   mg/l
  Total Dissolved Solids(TDS)   54.00   mg/l
  Total Fixed Solids(TFS)   24.00   mg/l
  Total Hardness as CaCo3   100.00   mg/l
  Total Suspended Solids(TSS)   24.00   mg/l
  Turbidity   4.67   NTU