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: 22/01/2019 Sample Time: 13:00  
Human Activities: Bathing Weather: Clear Water Body: Coochbihar lake
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Moderately Turbid Brown Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Conductivity   60.48   µs/cm
  Dissolved O2(DO)   7.20   mg/l
  Fecal Coliform   4000   MPN/100ml
  Nitrate-N   0.29   mg/l
  pH   7.30   Unit
  Temperature   26   ⁰C
  Total Coliform   22000   MPN/100ml
  Boron   0.014   mg/l
  Calcium   16.03   mg/l
  Chloride   18.59   mg/l
  COD   40.0   mg/l
  Fluoride   BDL   mg/l
  Magnesium   6.16   mg/l
  Phenolpthalein Alkanity   Nil   mg/l
  Phosphate-P   0.063   mg/l
  Potassium   BDL   mg/l
  Sodium   4.02   mg/l
  Sulphate   6.79   mg/l
  Total Alkalinity   36.00   mg/l
  Total Dissolved Solids(TDS)   74.00   mg/l
  Total Fixed Solids(TFS)   74.0   mg/l
  Total Hardness as CaCo3   62.00   mg/l
  Total Kjeldahl Nitrogen(TKN)      mg/l
  Total Suspended Solids(TSS)   46.00   mg/l
  Turbidity   11.80   NTU
  Ammonia-N   0.17   mg/l
  BOD   2.20   mg/l