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: 14/02/2020 Sample Time: 11:00 hrs  
Human Activities: Bathing,Washing,Fishing,discarded idols on banks 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: Light Green and Turbid Odour: Septic Visible effluent discharge: Moderate


Water Quality
Parameter Test Result Unit
  Phenolpthalein Alkanity   NIL   mg/l
  Total Alkalinity   74.00   mg/l
  Total Dissolved Solids(TDS)   234.00   mg/l
  Total Fixed Solids(TFS)   168.00   mg/l
  Potassium   5.00   mg/l
  Dissolved O2(DO)   6.90   mg/l
  Calcium   18.43   mg/l
  Total Suspended Solids(TSS)   128.00   mg/l
  Nitrate-N   1.44   mg/l
  Fecal Coliform   12000   MPN/100ml
  COD   21.00   mg/l
  Total Hardness as CaCo3   76.00   mg/l
  pH   7.11   Unit
  Temperature   22   ⁰C
  Total Coliform   34000   MPN/100ml
  Boron   19.96   mg/l
  Chloride   2.93   mg/l
  Fluoride   0.35   mg/l
  Magnesium   8.64   mg/l
  Phosphate-P   0.003   mg/l
  Sodium   9.40   mg/l
  Sulphate   18.52   mg/l
  Ammonia-N   0.66   mg/l
  BOD   2.20   mg/l
  Conductivity   146.70   µs/cm
  Turbidity   31.60   NTU