West Bengal Pollution Control Board

Siliguri Laboratory

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



Station: KAROLA, D/S OF JALPAIGURI, NEAR MIN BHAWAN River Basin: Tista CPCB Station Code: 2523
Sample Date: 18/11/2019 Sample Time: 15:15 hrs  
Human Activities: Bathing &Washing,Fishing Weather: Sunny Water Body: Karala at jalpaiguri
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Dark Green & moderately clear. Odour: Fishy Visible effluent discharge: Moderate


Water Quality
Parameter Test Result Unit
  Nitrate-N   0.74   mg/l
  Magnesium   4.03   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.009   mg/l
  Potassium   3.70   mg/l
  Sodium   3.60   mg/l
  Sulphate   11.06   mg/l
  Total Alkalinity   62.00   mg/l
  Ammonia-N   BDL   mg/l
  BOD   1.80   mg/l
  Conductivity   84.17   µs/cm
  Dissolved O2(DO)   7.10   mg/l
  Fecal Coliform   2100   MPN/100ml
  pH   7.48   Unit
  Temperature   26   ⁰C
  Total Coliform   7000   MPN/100ml
  Fluoride   0.15   mg/l
  Boron   0.017   mg/l
  Calcium   19.24   mg/l
  Chloride   7.83   mg/l
  COD   46.00   mg/l
  Total Fixed Solids(TFS)   32.00   mg/l
  Total Hardness as CaCo3   62.00   mg/l
  Total Suspended Solids(TSS)   30.00   mg/l
  Turbidity   5.34   NTU
  Total Dissolved Solids(TDS)   66.00   mg/l