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: 24/11/2020 Sample Time: 11:30  
Human Activities: Bathing and Washing . Weather: Sunny Water Body: Torsa
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Light Green Odour: Odour Free Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N      mg/l
  BOD   2.10   mg/l
  Conductivity   60.26   µs/cm
  Dissolved O2(DO)   6.40   mg/l
  Fecal Coliform   3400   MPN/100ml
  Fecal Streptococci   220   MPN/100ml
  Nitrate-N   0.55   mg/l
  pH   7.32   Unit
  Temperature(Water)   26   ⁰C
  Total Coliform   13000   MPN/100ml
  Boron   1.69   mg/l
  Calcium   13.62   mg/l
  Chloride   0.98   mg/l
  COD   38.00   mg/l
  Fluoride      mg/l
  Magnesium   5.18   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.025   mg/l
  Potassium   0.20   mg/l
  Sodium   0.90   mg/l
  Sulphate   9.86   mg/l
  Total Alkalinity   50.00   mg/l
  Total Dissolved Solids(TDS)   52.00   mg/l
  Total Fixed Solids(TFS)      mg/l
  Total Hardness as CaCo3   52.00   mg/l
  Total Suspended Solids(TSS)   44.00   mg/l
  Turbidity      NTU