West Bengal Pollution Control Board

Siliguri Laboratory

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



Station: MIRIKH LAKE River Basin: Tista CPCB Station Code: 2520
Sample Date: 09/12/2020 Sample Time: 16:30  
Human Activities: None Weather: Cloudy and foggy Water Body: Mirikh lake
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Moderately green Odour: Fishy Visible effluent discharge: Moderate


Water Quality
Parameter Test Result Unit
  Phenolpthalein Alkanity   NIL   mg/l
  Total Suspended Solids(TSS)   8.00   mg/l
  Conductivity   61.38   µs/cm
  Fecal Coliform   2600   MPN/100ml
  Nitrate-N   0.014   mg/l
  pH   7.16   Unit
  Temperature(Water)   8   ⁰C
  Total Coliform   5000   MPN/100ml
  Boron   2.90   mg/l
  Calcium   8.02   mg/l
  COD   43.00   mg/l
  Fluoride   BDL   mg/l
  BOD   1.90   mg/l
  Magnesium   8.06   mg/l
  Phosphate-P   0.012   mg/l
  Potassium   2.10   mg/l
  Sodium   6.80   mg/l
  Sulphate   21.00   mg/l
  Total Alkalinity   40.00   mg/l
  Total Dissolved Solids(TDS)   17.00   mg/l
  Total Fixed Solids(TFS)   58.00   mg/l
  Total Hardness as CaCo3   48.00   mg/l
  Turbidity   13.40   NTU
  Ammonia-N   0.18   mg/l
  Dissolved O2(DO)   6.70   mg/l
  Chloride   5.87   mg/l