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: 10/12/2020 Sample Time: 16:05  
Human Activities: 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
  BOD   1.40   mg/l
  Conductivity   76.92   µs/cm
  Dissolved O2(DO)   6.80   mg/l
  Fecal Coliform   7000   MPN/100ml
  Fecal Streptococci   330   MPN/100ml
  Nitrate-N   0.023   mg/l
  Temperature(Water)   19   ⁰C
  Total Coliform   17000   MPN/100ml
  Boron   0.967   mg/l
  Calcium   12.02   mg/l
  Chloride   1.95   mg/l
  COD   45.00   mg/l
  pH   6.97   Unit
  Fluoride   0.19   mg/l
  Magnesium   9.79   mg/l
  Phosphate-P   0.008   mg/l
  Potassium   3.80   mg/l
  Sodium   7.60   mg/l
  Sulphate   43.93   mg/l
  Total Alkalinity   50.00   mg/l
  Total Dissolved Solids(TDS)   112.00   mg/l
  Total Fixed Solids(TFS)   86.00   mg/l
  Total Hardness as CaCo3   64.00   mg/l
  Total Suspended Solids(TSS)   38.00   mg/l
  Turbidity   12.80   NTU
  Ammonia-N   0.25   mg/l
  Phenolpthalein Alkanity   NIL   mg/l