West Bengal Pollution Control Board

Siliguri Laboratory

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



Station: River Raidak at Alipurduar River Basin: Tista CPCB Station Code: 4728
Sample Date: 19/06/2020 Sample Time: 13:00  
Human Activities: Cattle wading. Weather: Cloudy. Water Body: Raidak
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Clear Green Odour: Fishy Visible effluent discharge: Moderate


Water Quality
Parameter Test Result Unit
  Total Hardness as CaCo3   98.00   mg/l
  Total Suspended Solids(TSS)   48.00   mg/l
  Turbidity      NTU
  Ammonia-N      mg/l
  BOD   1.20   mg/l
  Conductivity   78.23   µs/cm
  Dissolved O2(DO)   7.0   mg/l
  Fecal Coliform   900   MPN/100ml
  Nitrate-N      mg/l
  pH   7.10   Unit
  Temperature(Water)   27   ⁰C
  Total Coliform   3400   MPN/100ml
  Boron   0.38   mg/l
  Calcium   20.04   mg/l
  Chloride   16.63   mg/l
  COD   24.00   mg/l
  Fluoride      mg/l
  Magnesium   13.82   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.066   mg/l
  Potassium   1.10   mg/l
  Sodium   3.20   mg/l
  Sulphate   9.69   mg/l
  Total Alkalinity   82.00   mg/l
  Total Dissolved Solids(TDS)   52.00   mg/l
  Total Fixed Solids(TFS)      mg/l