West Bengal Pollution Control Board

Siliguri Laboratory

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



Station: WATER RESERVIOR AT DELO River Basin: Tista CPCB Station Code: 2521
Sample Date: 30/07/2019 Sample Time: 14:00  
Human Activities: None Weather: Cloudy Water Body: Delo lake
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Clear and Light Green Odour: Odour free Visible effluent discharge: None


Water Quality
Parameter Test Result Unit
  Total Hardness as CaCo3   13.02   mg/l
  Total Kjeldahl Nitrogen(TKN)      mg/l
  Turbidity   2.84   NTU
  Total Suspended Solids(TSS)   14.00   mg/l
  Ammonia-N   0.18   mg/l
  BOD   1.20   mg/l
  Conductivity   97.43   µs/cm
  Dissolved O2(DO)   7.60   mg/l
  Fecal Coliform   110   MPN/100ml
  Nitrate-N   0.83   mg/l
  pH   7.10   Unit
  Temperature   19   ⁰C
  Total Coliform   220   MPN/100ml
  Boron   0.003   mg/l
  Calcium   4.46   mg/l
  Chloride   1.96   mg/l
  COD   5.93   mg/l
  Fluoride   BDL   mg/l
  Magnesium   0.53   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Phosphate-P   0.045   mg/l
  Potassium   BDL   mg/l
  Sodium   6.80   mg/l
  Sulphate   3.80   mg/l
  Total Alkalinity   10.00   mg/l
  Total Dissolved Solids(TDS)   46.00   mg/l
  Total Fixed Solids(TFS)   24.00   mg/l