West Bengal Pollution Control Board |
Siliguri Laboratory |
Paribesh Bhawan, Paribahan Nagar, P.O. Matigara, Siliguri,Darjeeling 734 428. |
| Station: River Raidak at Alipurduar | River Basin: Tista | CPCB Station Code: 4728 |
| Sample Date: 17/12/2021 | Sample Time: 15:00 Hrs | |
| Human Activities: None | Weather: Sunny and Clear. | Water Body: Raidak |
| Frequency Of Monitoring: Monthly | Use Based Class: B | Approximate Depth(Bottom/Table): 1.00 m |
| Color & Intensity: light Green and Clear | Odour: Fishy | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Conductivity | 148.80 | µs/cm |
| Dissolved O2(DO) | 8.10 | mg/l |
| Fecal Coliform | 900 | MPN/100ml |
| Fecal Streptococci | 18 | MPN/100ml |
| Nitrate-N | 0.08 | mg/l |
| pH | 7.47 | Unit |
| Temperature(Water) | 23 | ⁰C |
| Total Coliform | 17000 | MPN/100ml |
| Boron | 2.50 | mg/l |
| Calcium | 30.46 | mg/l |
| Chloride | 5.87 | mg/l |
| Fluoride | BDL | mg/l |
| Magnesium | 10.46 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.005 | mg/l |
| Potassium | BDL | mg/l |
| Sodium | 0.90 | mg/l |
| Sulphate | 5.31 | mg/l |
| Total Alkalinity | 24.00 | mg/l |
| Total Dissolved Solids(TDS) | 89.00 | mg/l |
| Total Fixed Solids(TFS) | 66.00 | mg/l |
| Total Hardness as CaCo3 | 112.00 | mg/l |
| Total Suspended Solids(TSS) | 13.00 | mg/l |
| BOD | 1.20 | mg/l |
| Ammonia-N | BDL | mg/l |
| COD | 15.36 | mg/l |
| Turbidity | 2.85 | NTU |