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: 24/12/2020 Sample Time: 14:00  
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: Moderately green Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  pH   7.42   Unit
  Calcium   21.64   mg/l
  Chloride   1.95   mg/l
  COD   46.00   mg/l
  Fluoride   0.11   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.026   mg/l
  Potassium   0.90   mg/l
  Sodium   3.20   mg/l
  Sulphate   18.21   mg/l
  Total Alkalinity   64.00   mg/l
  Total Fixed Solids(TFS)   162.00   mg/l
  Total Hardness as CaCo3   100.00   mg/l
  Total Suspended Solids(TSS)   64.00   mg/l
  Turbidity   9.83   NTU
  Ammonia-N   0.12   mg/l
  BOD   2.00   mg/l
  Conductivity   94.65   µs/cm
  Fecal Streptococci   21   MPN/100ml
  Fecal Coliform   2600   MPN/100ml
  Temperature(Water)   21   ⁰C
  Nitrate-N   0.009   mg/l
  Total Coliform   9000   MPN/100ml
  Dissolved O2(DO)   7.10   mg/l
  Boron   0.919   mg/l
  Magnesium   13.24   mg/l
  Total Dissolved Solids(TDS)   16.00   mg/l