West Bengal Pollution Control Board

Siliguri Laboratory

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



Station: KOCHBIHAR LAKE (SAGAR DIGHI) River Basin: Raidak_Torsa CPCB Station Code: 2519
Sample Date: 27/12/2019 Sample Time: 14:30 Hrs  
Human Activities: Bathing,washing Weather: Sunny and Clear Water Body: Coochbihar lake
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Moderately green and Muddy Odour: fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Nitrate-N   0.37   mg/l
  Chloride   17.61   mg/l
  COD   35.00   mg/l
  Magnesium   1.73   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.020   mg/l
  Potassium   0.90   mg/l
  Sodium   0.10   mg/l
  Sulphate   12.73   mg/l
  Total Alkalinity   48.00   mg/l
  Total Dissolved Solids(TDS)   60.00   mg/l
  Total Suspended Solids(TSS)   52.00   mg/l
  Turbidity   8.63   NTU
  BOD   1.20   mg/l
  Conductivity   43.59   µs/cm
  Dissolved O2(DO)   6.80   mg/l
  Fluoride   BDL   mg/l
  Total Fixed Solids(TFS)   40.00   mg/l
  Total Hardness as CaCo3   28.00   mg/l
  Ammonia-N   0.12   mg/l
  pH   7.62   Unit
  Temperature   18   ⁰C
  Fecal Coliform   2700   MPN/100ml
  Total Coliform   8000   MPN/100ml
  Boron   0.004   mg/l
  Calcium   8.82   mg/l