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: 16/02/2022 Sample Time: 13:05  
Human Activities: Bathing and Washing . 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 and moderately turbid Odour: Fishy. Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   BDL   mg/l
  BOD   2.00   mg/l
  Conductivity   114.80   µs/cm
  Dissolved O2(DO)   8.30   mg/l
  Fecal Coliform   600   MPN/100ml
  Fecal Streptococci   46   MPN/100ml
  Total Coliform   800   MPN/100ml
  Boron   0.52   mg/l
  Calcium   19.23   mg/l
  Chloride   3.91   mg/l
  COD   15.90   mg/l
  Fluoride   BDL   mg/l
  Magnesium   12.09   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.007   mg/l
  Potassium   0.80   mg/l
  Sodium   1.20   mg/l
  Sulphate   9.05   mg/l
  Total Alkalinity   66.00   mg/l
  Total Dissolved Solids(TDS)   79.00   mg/l
  Total Fixed Solids(TFS)   78.00   mg/l
  Total Hardness as CaCo3   90.00   mg/l
  Total Suspended Solids(TSS)   22.00   mg/l
  Turbidity   2.65   NTU
  Nitrate-N   0.39   mg/l
  pH   6.05   Unit
  Temperature(Water)   22   ⁰C