West Bengal Pollution Control Board

Siliguri Laboratory

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



Station: River Torsa at Hasimara River Basin: GANGA CPCB Station Code: 4724
Sample Date: 27/08/2021 Sample Time: 11:10  
Human Activities: None Weather: Sunny and Clear. Water Body: Torsa
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 2.00 m 
Color & Intensity: Moderately Brown and turbid Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   0.18   mg/l
  BOD   1.40   mg/l
  Conductivity   60.10   µs/cm
  Dissolved O2(DO)   6.80   mg/l
  Fecal Coliform   2700   MPN/100ml
  Fecal Streptococci   14   MPN/100ml
  Nitrate-N   0.03   mg/l
  pH   7.30   Unit
  Temperature(Water)   28   ⁰C
  Total Coliform   8000   MPN/100ml
  Boron   0.94   mg/l
  Calcium   15.23   mg/l
  Chloride   9.78   mg/l
  COD   12.00   mg/l
  Fluoride   BDL   mg/l
  Magnesium   8.64   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.001   mg/l
  Potassium   1.0   mg/l
  Sodium   0.40   mg/l
  Sulphate   5.42   mg/l
  Total Alkalinity   42.00   mg/l
  Total Dissolved Solids(TDS)   20.00   mg/l
  Total Fixed Solids(TFS)   522.00   mg/l
  Total Hardness as CaCo3   68.0   mg/l
  Total Suspended Solids(TSS)   28.00   mg/l
  Turbidity   57.10   NTU