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: 17/08/2020 Sample Time: 14:15 Hrs  
Human Activities: Fishing,Car washing ,Bathing. Weather: Cloudy Water Body: Mahananda at Siliguri
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Moderately green and moderately Turbid Odour: Fishy Visible effluent discharge: Moderate


Water Quality
Parameter Test Result Unit
  Conductivity   121.40   µs/cm
  Dissolved O2(DO)   6.90   mg/l
  Fecal Coliform   7000   MPN/100ml
  Temperature(Water)   30   ⁰C
  Total Coliform   17000   MPN/100ml
  Boron   3.97   mg/l
  Calcium   16.03   mg/l
  COD   56.00   mg/l
  Magnesium   0.24   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.028   mg/l
  Potassium   6.1   mg/l
  Sodium   5.0   mg/l
  Sulphate   11.37   mg/l
  Total Alkalinity   60.00   mg/l
  Total Dissolved Solids(TDS)   112.0   mg/l
  Total Suspended Solids(TSS)   52.00   mg/l
  Turbidity   51.30   NTU
  Ammonia-N   0.91   mg/l
  Chloride   6.85   mg/l
  Nitrate-N   1.17   mg/l
  Total Fixed Solids(TFS)   276.00   mg/l
  BOD   2.20   mg/l
  Total Hardness as CaCo3   40.0   mg/l
  Fluoride   0.24   mg/l
  pH   6.05   Unit