West Bengal Pollution Control Board

Siliguri Laboratory

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



Station: River Balason at Khaprail More River Basin: Mahananda CPCB Station Code: 4722
Sample Date: 19/05/2022 Sample Time: 11:32  
Human Activities: Bathing and Washing,open defication and sand recovery, Weather: Sunny and Clear. Water Body: Balason
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Moderately Brown and turbid Odour: Fishy Visible effluent discharge: Moderate


Water Quality
Parameter Test Result Unit
  Ammonia-N   BDL   mg/l
  BOD   2.10   mg/l
  Conductivity   81.30   µs/cm
  Dissolved O2(DO)   7.60   mg/l
  Fecal Coliform   90000   MPN/100ml
  Fecal Streptococci   46   MPN/100ml
  Nitrate-N   1.65   mg/l
  pH   7.13   Unit
  Temperature(Water)   24   ⁰C
  Total Coliform   160000   MPN/100ml
  Boron   2.88   mg/l
  Calcium   8.00   mg/l
  Chloride   3.91   mg/l
  COD   15.00   mg/l
  Fluoride   BDL   mg/l
  Magnesium   0.97   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.016   mg/l
  Potassium   4.10   mg/l
  Sodium   6.50   mg/l
  Sulphate   11.85   mg/l
  Total Alkalinity   30.00   mg/l
  Total Dissolved Solids(TDS)   40.00   mg/l
  Total Fixed Solids(TFS)   220.00   mg/l
  Total Hardness as CaCo3   24.00   mg/l
  Total Suspended Solids(TSS)   183.00   mg/l
  Turbidity   85.90   NTU