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: 11/07/2022 Sample Time: 14:15  
Human Activities: Bathing,Washing and Fishing. Weather: Cloudy Water Body: Mechi
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Light green and moderately turbid Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   BDL   mg/l
  BOD   1.40   mg/l
  Conductivity   91.41   µs/cm
  Dissolved O2(DO)   6.90   mg/l
  Fecal Coliform   700   MPN/100ml
  Fecal Streptococci   17   MPN/100ml
  Nitrate-N   0.14   mg/l
  pH   6.80   Unit
  Temperature(Water)   29   ⁰C
  Total Coliform   5000   MPN/100ml
  Boron   1.26   mg/l
  Calcium   9.60   mg/l
  Chloride   4.89   mg/l
  COD   8.00   mg/l
  Fluoride   0.15   mg/l
  Magnesium   0.97   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.16   mg/l
  Potassium   3.80   mg/l
  Sodium   6.30   mg/l
  Sulphate   11.92   mg/l
  Total Alkalinity   28.00   mg/l
  Total Dissolved Solids(TDS)   60.00   mg/l
  Total Fixed Solids(TFS)   96.00   mg/l
  Total Hardness as CaCo3   28.00   mg/l
  Total Suspended Solids(TSS)   41.00   mg/l
  Turbidity   7.75   NTU