West Bengal Pollution Control Board

Siliguri Laboratory

Paribesh Bhawan, Paribahan Nagar, P.O. Matigara, Siliguri,Darjeeling 734 428.



Station: River Jaldhaka at Dhupguri River Basin: Tista CPCB Station Code: 4717
Sample Date: 18/07/2022 Sample Time: 11:08  
Human Activities: None Weather: Sunny and Clear. Water Body: Jaldhaka
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Moderately Brown and turbid Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   0.13   mg/l
  BOD   2.00   mg/l
  Conductivity   124.90   µs/cm
  Dissolved O2(DO)   6.70   mg/l
  Fecal Coliform   1700   MPN/100ml
  Fecal Streptococci   22   MPN/100ml
  Nitrate-N   0.07   mg/l
  pH   7.70   Unit
  Temperature(Water)   26   ⁰C
  Total Coliform   3300   MPN/100ml
  Boron   0.50   mg/l
  Calcium   16.80   mg/l
  Chloride   0.97   mg/l
  COD   33.28   mg/l
  Fluoride   BDL   mg/l
  Magnesium   6.80   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   BDL   mg/l
  Potassium   14.90   mg/l
  Sodium   5.30   mg/l
  Sulphate   10.66   mg/l
  Total Alkalinity   70.00   mg/l
  Total Dissolved Solids(TDS)   80.00   mg/l
  Total Fixed Solids(TFS)   1438.00   mg/l
  Total Hardness as CaCo3   70.00   mg/l
  Total Suspended Solids(TSS)   1898.00   mg/l
  Turbidity   587.00   NTU