West Bengal Pollution Control Board

Siliguri Laboratory

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



Station: MAHANANDA AT SILIGURI River Basin: Mahananda CPCB Station Code: 1946
Sample Date: 16/06/2020 Sample Time: 13:50  
Human Activities: None Weather: Sunny and Clear. Water Body: Mahananda at Siliguri
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Muddy Light Brown Odour: Fishy Visible effluent discharge: Moderate


Water Quality
Parameter Test Result Unit
  Total Coliform   17000   MPN/100ml
  Boron   0.34   mg/l
  Calcium   19.24   mg/l
  Chloride   12.72   mg/l
  COD   43.00   mg/l
  Fluoride      mg/l
  Magnesium   12.09   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.825   mg/l
  Potassium   3.20   mg/l
  Ammonia-N      mg/l
  BOD   1.80   mg/l
  Conductivity   136.40   µs/cm
  Dissolved O2(DO)   6.90   mg/l
  Fecal Coliform   2700   MPN/100ml
  Nitrate-N      mg/l
  pH   7.62   Unit
  Temperature(Water)   28   ⁰C
  Total Suspended Solids(TSS)   72.00   mg/l
  Turbidity      NTU
  Sodium   8.10   mg/l
  Sulphate   13.69   mg/l
  Total Alkalinity   48.00   mg/l
  Total Dissolved Solids(TDS)   122.00   mg/l
  Total Fixed Solids(TFS)      mg/l
  Total Hardness as CaCo3   90.00   mg/l