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: 09/03/2022 Sample Time: 14:10  
Human Activities: Bathing and Washing Weather: Sunny and Clear. Water Body: Mechi
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Light Green and clear Odour: Fishy. Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   BDL   mg/l
  BOD   1.10   mg/l
  Conductivity   85.91   µs/cm
  Dissolved O2(DO)   8.40   mg/l
  Fecal Coliform   7000   MPN/100ml
  Fecal Streptococci   43   MPN/100ml
  Nitrate-N   2.33   mg/l
  pH   6.86   Unit
  Temperature(Water)   25   ⁰C
  Total Coliform   22000   MPN/100ml
  Boron   0.89   mg/l
  Calcium   4.80   mg/l
  Chloride   16.63   mg/l
  COD   9.20   mg/l
  Fluoride   BDL   mg/l
  Magnesium   4.37   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.045   mg/l
  Potassium   1.70   mg/l
  Sodium   3.60   mg/l
  Sulphate   10.36   mg/l
  Total Alkalinity   30.00   mg/l
  Total Dissolved Solids(TDS)   56.00   mg/l
  Total Fixed Solids(TFS)   118.00   mg/l
  Total Hardness as CaCo3   30.00   mg/l
  Total Suspended Solids(TSS)   5.00   mg/l
  Turbidity   1.42   NTU