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: 28/10/2021 Sample Time: 12:20  
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: Light Green and Turbid Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N      mg/l
  BOD   0.80   mg/l
  Conductivity   120.10   µs/cm
  Dissolved O2(DO)   7.20   mg/l
  Fecal Coliform   3000   MPN/100ml
  Fecal Streptococci   17   MPN/100ml
  Nitrate-N   0.07   mg/l
  pH   6.80   Unit
  Temperature(Water)   27   ⁰C
  Total Coliform   9000   MPN/100ml
  Boron   0.93   mg/l
  Calcium   23.24   mg/l
  Chloride   4.89   mg/l
  COD   28.00   mg/l
  Fluoride      mg/l
  Magnesium   10.95   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.005   mg/l
  Potassium   1.10   mg/l
  Sodium   1.50   mg/l
  Sulphate   2.56   mg/l
  Total Alkalinity   124.00   mg/l
  Total Dissolved Solids(TDS)   22.00   mg/l
  Total Fixed Solids(TFS)      mg/l
  Total Hardness as CaCo3   96.00   mg/l
  Total Suspended Solids(TSS)   24.00   mg/l
  Turbidity      NTU