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: 14/11/2019 Sample Time: 10:35 hrs  
Human Activities: bathing & Washing,Fishing. Weather: Sunny Water Body: Mahananda at Siliguri
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Light Brown and moderately Clear Odour: Fishy Visible effluent discharge: Moderate


Water Quality
Parameter Test Result Unit
  Nitrate-N   0.63   mg/l
  pH   6.89   Unit
  Fecal Coliform   4000   MPN/100ml
  Temperature   27   ⁰C
  Total Coliform   11000   MPN/100ml
  Sulphate   11.54   mg/l
  Total Alkalinity   74.00   mg/l
  Total Dissolved Solids(TDS)   96.00   mg/l
  Magnesium   5.76   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.020   mg/l
  Potassium   3.70   mg/l
  Total Fixed Solids(TFS)   128.00   mg/l
  Total Hardness as CaCo3   68.00   mg/l
  Total Suspended Solids(TSS)   62.00   mg/l
  Turbidity   2.66   NTU
  Calcium   19.24   mg/l
  Chloride   8.81   mg/l
  COD   48.00   mg/l
  Fluoride   0.18   mg/l
  Sodium   5.80   mg/l
  Ammonia-N   0.48   mg/l
  BOD   1.40   mg/l
  Conductivity   93.20   µs/cm
  Dissolved O2(DO)   6.80   mg/l
  Boron   0.015   mg/l