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: 08/10/2020 Sample Time: 11:30  
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: Light Green Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   0.15   mg/l
  pH   7.55   Unit
  Chloride   12.72   mg/l
  Total Alkalinity   24.00   mg/l
  Conductivity   52.10   µs/cm
  Dissolved O2(DO)   6.90   mg/l
  Fecal Coliform   5000   MPN/100ml
  Nitrate-N   0.98   mg/l
  Temperature(Water)   27   ⁰C
  Total Coliform   11000   MPN/100ml
  Boron   2.52   mg/l
  Calcium   8.82   mg/l
  COD   28.00   mg/l
  Fluoride   BDL   mg/l
  Magnesium   2.30   mg/l
  BOD   1.40   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.014   mg/l
  Potassium   1.10   mg/l
  Sodium   0.60   mg/l
  Sulphate   13.05   mg/l
  Total Dissolved Solids(TDS)   146.00   mg/l
  Total Fixed Solids(TFS)   46.00   mg/l
  Total Hardness as CaCo3   30.00   mg/l
  Total Suspended Solids(TSS)   118.00   mg/l
  Turbidity   0.81   NTU