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: 20/09/2021 Sample Time: 16:33  
Human Activities: Bathing and Washing . Weather: Sunny and Clear. Water Body: Balason
Frequency Of Monitoring: Monthly Use Based Class: B Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Light Brown and moderately turbid Odour: Fishy Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Ammonia-N   0.34   mg/l
  BOD   2.00   mg/l
  Conductivity   57.27   µs/cm
  Dissolved O2(DO)   7.00   mg/l
  Fecal Coliform   2700   MPN/100ml
  Fecal Streptococci   25   MPN/100ml
  Nitrate-N   0.11   mg/l
  pH   7.35   Unit
  Temperature(Water)   30   ⁰C
  Total Coliform   8000   MPN/100ml
  Boron   0.84   mg/l
  Calcium   7.21   mg/l
  Chloride   5.87   mg/l
  COD   18.00   mg/l
  Fluoride   0.13   mg/l
  Magnesium   4.61   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.002   mg/l
  Potassium   0.8   mg/l
  Sodium   2.4   mg/l
  Sulphate   9.00   mg/l
  Total Alkalinity   24.00   mg/l
  Total Dissolved Solids(TDS)   22.00   mg/l
  Total Fixed Solids(TFS)   8.00   mg/l
  Total Hardness as CaCo3   34.00   mg/l
  Total Suspended Solids(TSS)   21.00   mg/l
  Turbidity   1.52   NTU