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: 26/08/2021 Sample Time: 13:10  
Human Activities: Bathing and Washing and Fishing. Weather: Sunny and Clear. Water Body: Karala at jalpaiguri
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Moderately green and clear Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   0.18   mg/l
  BOD   1.60   mg/l
  Conductivity   56.42   µs/cm
  Dissolved O2(DO)   7.40   mg/l
  Fecal Coliform   3400   MPN/100ml
  Fecal Streptococci   12   MPN/100ml
  Nitrate-N   0.08   mg/l
  pH   7.20   Unit
  Temperature(Water)   28   ⁰C
  Total Coliform   13000   MPN/100ml
  Boron   0.54   mg/l
  Calcium   12.02   mg/l
  Chloride   10.76   mg/l
  COD   16.00   mg/l
  Fluoride   BDL   mg/l
  Magnesium   2.88   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.007   mg/l
  Potassium   0.20   mg/l
  Sodium   0.60   mg/l
  Sulphate   7.35   mg/l
  Total Alkalinity   76.00   mg/l
  Total Dissolved Solids(TDS)   16.00   mg/l
  Total Fixed Solids(TFS)   12.00   mg/l
  Total Hardness as CaCo3   40.00   mg/l
  Total Suspended Solids(TSS)   10.00   mg/l
  Turbidity   4.13   NTU