West Bengal Pollution Control Board

Siliguri Laboratory

Paribesh Bhawan, Paribahan Nagar, P.O. Matigara, Siliguri,Darjeeling 734 428.



Station: River Mechi at Nehaljote River Basin: Mahananda CPCB Station Code: 4727
Sample Date: 26/11/2021 Sample Time: 16:00  
Human Activities: None Weather: Sunny and Clear. Water Body: Mechi
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Moderately Brown and turbid Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   BDL   mg/l
  BOD   2.20   mg/l
  Conductivity   85.29   µs/cm
  Dissolved O2(DO)   7.00   mg/l
  Fecal Coliform   1700   MPN/100ml
  Fecal Streptococci   23   MPN/100ml
  Nitrate-N   0.07   mg/l
  pH   7.43   Unit
  Temperature(Water)   21   ⁰C
  Total Coliform   5000   MPN/100ml
  Boron   4.43   mg/l
  Calcium   16.83   mg/l
  Chloride   18.59   mg/l
  COD   24.0   mg/l
  Fluoride   BDL   mg/l
  Magnesium   4.60   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.002   mg/l
  Potassium   4.10   mg/l
  Sodium   6.50   mg/l
  Sulphate   12.71   mg/l
  Total Alkalinity   28.00   mg/l
  Total Dissolved Solids(TDS)   46.0   mg/l
  Total Fixed Solids(TFS)   62.00   mg/l
  Total Hardness as CaCo3   42.00   mg/l
  Total Suspended Solids(TSS)   105.00   mg/l
  Turbidity   3.03   NTU