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: 02/02/2021 Sample Time: 14:30 Hrs  
Human Activities: None Weather: Sunny Water Body: Torsa
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Moderately Green and Clear Odour: Pungent Visible effluent discharge: Moderate Brown and Slightly Turbid


Water Quality
Parameter Test Result Unit
  Ammonia-N   0.40   mg/l
  BOD   1.30   mg/l
  Conductivity   86.20   µs/cm
  Dissolved O2(DO)   6.90   mg/l
  Fecal Coliform   2300   MPN/100ml
  Fecal Streptococci   17   MPN/100ml
  Nitrate-N   0.05   mg/l
  pH   6.97   Unit
  Temperature(Water)   20   ⁰C
  Total Coliform   7000   MPN/100ml
  Boron   1.49   mg/l
  Calcium   22.44   mg/l
  Chloride   4.89   mg/l
  COD   40.00   mg/l
  Fluoride   0.14   mg/l
  Magnesium   8.06   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.002   mg/l
  Potassium   1.0   mg/l
  Sodium   2.40   mg/l
  Sulphate   14.00   mg/l
  Total Alkalinity   68.00   mg/l
  Total Dissolved Solids(TDS)   56.00   mg/l
  Total Fixed Solids(TFS)   134.00   mg/l
  Total Hardness as CaCo3   84.00   mg/l
  Total Suspended Solids(TSS)   36.00   mg/l
  Turbidity      NTU