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: 16/02/2022 Sample Time: 10:50  
Human Activities: Bathing and Washing . 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 moderately turbid Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   BDL   mg/l
  BOD   2.20   mg/l
  Conductivity   124.00   µs/cm
  Dissolved O2(DO)   7.60   mg/l
  Fecal Coliform   2200   MPN/100ml
  Fecal Streptococci   14   MPN/100ml
  Nitrate-N   0.29   mg/l
  pH   6.80   Unit
  Temperature(Water)   21   ⁰C
  Total Coliform   3400   MPN/100ml
  Boron   0.97   mg/l
  Calcium   8.01   mg/l
  Chloride   5.87   mg/l
  COD   68.64   mg/l
  Fluoride   BDL   mg/l
  Magnesium   4.60   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.053   mg/l
  Potassium   0.90   mg/l
  Sodium   1.40   mg/l
  Sulphate   10.25   mg/l
  Total Alkalinity   64.00   mg/l
  Total Dissolved Solids(TDS)   87.00   mg/l
  Total Fixed Solids(TFS)   70.00   mg/l
  Total Hardness as CaCo3   44.00   mg/l
  Total Suspended Solids(TSS)   18.00   mg/l
  Turbidity   7.47   NTU