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: 22/05/2020 Sample Time: 12:30 Hrs  
Human Activities: None Weather: Rainy Water Body: Delo lake
Frequency Of Monitoring: Quarterly Use Based Class: C Approximate Depth(Bottom/Table): 1.00 m 
Color & Intensity: Light Green and Clear Odour: None Visible effluent discharge: None.


Water Quality
Parameter Test Result Unit
  Phosphate-P   0.008   mg/l
  Total Alkalinity   16.00   mg/l
  Total Suspended Solids(TSS)   14.00   mg/l
  Turbidity      NTU
  Fecal Coliform   90   MPN/100ml
  Calcium   8.81   mg/l
  Nitrate-N      mg/l
  pH   7.80   Unit
  Temperature(Water)   18   ⁰C
  Total Coliform   120   MPN/100ml
  Boron   0.51   mg/l
  Chloride   11.74   mg/l
  Sodium   6.40   mg/l
  COD   8.00   mg/l
  Fluoride      mg/l
  Magnesium   0.57   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Total Dissolved Solids(TDS)   26.00   mg/l
  Total Fixed Solids(TFS)      mg/l
  Total Hardness as CaCo3   24.00   mg/l
  Potassium   BDL   mg/l
  Sulphate   3.04   mg/l
  Ammonia-N      mg/l
  BOD   0.80   mg/l
  Conductivity   14.30   µs/cm
  Dissolved O2(DO)   7.20   mg/l