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: 18/03/2021 Sample Time: 14:20 Hrs.  
Human Activities: Bathing Weather: Sunny Water Body: Karala at jalpaiguri
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Light Green and Clear Odour: fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  BOD   1.20   mg/l
  Conductivity   63.00   µs/cm
  Dissolved O2(DO)   7.50   mg/l
  Fecal Coliform   2700   MPN/100ml
  Fecal Streptococci   17   MPN/100ml
  Nitrate-N   0.02   mg/l
  pH   6.91   Unit
  Boron   0.46   mg/l
  Chloride   4.89   mg/l
  COD   38.00   mg/l
  Fluoride   0.20   mg/l
  Magnesium   1.92   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.007   mg/l
  Potassium   5.40   mg/l
  Sodium   2.8   mg/l
  Sulphate   9.56   mg/l
  Total Alkalinity   78.0   mg/l
  Total Dissolved Solids(TDS)   37.00   mg/l
  Total Fixed Solids(TFS)   104.00   mg/l
  Total Suspended Solids(TSS)   32.00   mg/l
  Ammonia-N   0.13   mg/l
  Turbidity   4.26   NTU
  Temperature(Water)   27   ⁰C
  Total Coliform   13000   MPN/100ml
  Calcium   12.83   mg/l
  Total Hardness as CaCo3   40.00   mg/l