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: 22/10/2019 Sample Time: 14:20  
Human Activities: None Weather: Sunny and Clear 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 Alkalinity   45.00   mg/l
  Total Dissolved Solids(TDS)   22.00   mg/l
  BOD   0.80   mg/l
  Conductivity   95.69   µs/cm
  Dissolved O2(DO)   7.20   mg/l
  Fecal Coliform   90   MPN/100ml
  Nitrate-N   0.26   mg/l
  pH   7.20   Unit
  Temperature   14   ⁰C
  Total Coliform   170   MPN/100ml
  Boron   0.004   mg/l
  Calcium   4.01   mg/l
  Chloride   23.48   mg/l
  COD   18.00   mg/l
  Fluoride   BDL   mg/l
  Magnesium   0.46   mg/l
  Phenolpthalein Alkanity   NIL   mg/l
  Total Fixed Solids(TFS)   188.00   mg/l
  Total Hardness as CaCo3   12.00   mg/l
  Total Suspended Solids(TSS)   14.00   mg/l
  Turbidity   17.60   NTU
  Ammonia-N   BDL   mg/l
  Phosphate-P   0.008   mg/l
  Potassium   2.00   mg/l
  Sodium   8.10   mg/l
  Sulphate   5.06   mg/l