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: 20/01/2022 Sample Time: 09:45  
Human Activities: None Weather: Cloudy. 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   1.10   mg/l
  Conductivity   111.90   µs/cm
  Dissolved O2(DO)   7.10   mg/l
  Fecal Coliform   9000   MPN/100ml
  Fecal Streptococci   32.00   MPN/100ml
  Nitrate-N   0.03   mg/l
  pH   7.16   Unit
  Temperature(Water)   14   ⁰C
  Total Coliform   28000   MPN/100ml
  Boron   1.77   mg/l
  Calcium   20.16   mg/l
  Chloride   4.89   mg/l
  COD   20.00   mg/l
  Fluoride   0.14   mg/l
  Magnesium   17.63   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.001   mg/l
  Potassium   1.50   mg/l
  Sodium   1.60   mg/l
  Sulphate   8.51   mg/l
  Total Alkalinity   62.00   mg/l
  Total Dissolved Solids(TDS)   67.00   mg/l
  Total Fixed Solids(TFS)   24.00   mg/l
  Total Hardness as CaCo3   114.00   mg/l
  Total Suspended Solids(TSS)   6.00   mg/l
  Turbidity   2.69   NTU