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: 02/02/2021 Sample Time: 16:00 Hrs  
Human Activities: Bathing,Washing and fishing Weather: sunny Water Body: Jaldhaka
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: light Green and Clear Odour: None Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   0.38   mg/l
  BOD   1.20   mg/l
  Conductivity   72.18   µs/cm
  Dissolved O2(DO)   6.80   mg/l
  Fecal Coliform   2300   MPN/100ml
  Fecal Streptococci   25   MPN/100ml
  pH   7.10   Unit
  Temperature(Water)   20   ⁰C
  Total Coliform   11000   MPN/100ml
  Boron   2.52   mg/l
  Calcium   10.42   mg/l
  Chloride   4.89   mg/l
  COD   56.00   mg/l
  Fluoride   0.17   mg/l
  Magnesium   5.18   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.005   mg/l
  Potassium   1.40   mg/l
  Sodium   1.50   mg/l
  Sulphate   11.56   mg/l
  Total Alkalinity   24.00   mg/l
  Total Dissolved Solids(TDS)   58.00   mg/l
  Total Fixed Solids(TFS)   82.00   mg/l
  Total Hardness as CaCo3   44.00   mg/l
  Total Suspended Solids(TSS)   58.00   mg/l
  Turbidity      NTU
  Nitrate-N   0.04   mg/l