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: 27/11/2019 Sample Time: 10:20 Hrs  
Human Activities: None Weather: Sunny and Clear Water Body: Torsa
Frequency Of Monitoring: Monthly Use Based Class: B 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
  Ammonia-N   BDL   mg/l
  BOD   1.50   mg/l
  Conductivity   66.05   µs/cm
  Dissolved O2(DO)   7.40   mg/l
  Fecal Coliform   3400   MPN/100ml
  Nitrate-N   0.41   mg/l
  pH   7.68   Unit
  Temperature   25   ⁰C
  Total Coliform   13000   MPN/100ml
  Boron   0.025   mg/l
  Calcium   6.41   mg/l
  Chloride   9.78   mg/l
  COD   50.00   mg/l
  Fluoride   0.15   mg/l
  Magnesium   4.61   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.049   mg/l
  Potassium   BDL   mg/l
  Sodium   BDL   mg/l
  Sulphate   13.94   mg/l
  Total Alkalinity   80.00   mg/l
  Total Dissolved Solids(TDS)   42.00   mg/l
  Total Fixed Solids(TFS)   62.00   mg/l
  Total Hardness as CaCo3   84.00   mg/l
  Total Suspended Solids(TSS)   28.00   mg/l
  Turbidity   2.01   NTU