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: 20/07/2021 Sample Time: 12:20Hrs  
Human Activities: Washing Weather: Sunny Water Body: Mechi
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Light Brown & moderately Turbid Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Fecal Coliform   3400   MPN/100ml
  Phosphate-P   0.005   mg/l
  Ammonia-N   0.17   mg/l
  Total Hardness as CaCo3   22.0   mg/l
  Total Suspended Solids(TSS)   12.00   mg/l
  Turbidity   32.50   NTU
  BOD   1.20   mg/l
  Conductivity   62.15   µs/cm
  Dissolved O2(DO)   6.80   mg/l
  Fecal Streptococci   17   MPN/100ml
  Nitrate-N   0.19   mg/l
  pH   7.40   Unit
  Temperature(Water)   27   ⁰C
  Total Coliform   13000   MPN/100ml
  Boron   1.58   mg/l
  Calcium   6.41   mg/l
  Chloride   9.78   mg/l
  COD   25.00   mg/l
  Fluoride   0.14   mg/l
  Magnesium   1.152   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Potassium   0.8   mg/l
  Sodium   1.6   mg/l
  Sulphate   12.58   mg/l
  Total Alkalinity   64.00   mg/l
  Total Dissolved Solids(TDS)   32.00   mg/l
  Total Fixed Solids(TFS)   152.00   mg/l