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: 18/02/2021 Sample Time: 13:10  
Human Activities: Bathing and Washing and Fishing. 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: Moderately green Odour: Fishy Visible effluent discharge: Moderate


Water Quality
Parameter Test Result Unit
  Ammonia-N   0.37   mg/l
  BOD   1.80   mg/l
  Conductivity   110.00   µs/cm
  Dissolved O2(DO)   6.50   mg/l
  Fecal Coliform   5000   MPN/100ml
  Fecal Streptococci   140   MPN/100ml
  Nitrate-N   0.17   mg/l
  pH   6.90   Unit
  Temperature(Water)   26   ⁰C
  Total Coliform   13000   MPN/100ml
  Boron   1.55   mg/l
  Calcium   12.83   mg/l
  Chloride   5.87   mg/l
  COD   54.00   mg/l
  Fluoride   BDL   mg/l
  Magnesium   12.67   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.004   mg/l
  Potassium   5.0   mg/l
  Sodium   9.20   mg/l
  Sulphate   16.67   mg/l
  Total Alkalinity   28.00   mg/l
  Total Fixed Solids(TFS)   164.00   mg/l
  Total Hardness as CaCo3   76.00   mg/l
  Total Suspended Solids(TSS)   64.00   mg/l
  Turbidity      NTU
  Total Dissolved Solids(TDS)   86.00   mg/l