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: 15/09/2020 | Sample Time: 13:15 | |
| Human Activities: None | Weather: Cloudy and Rainy. | Water Body: Raidak |
| Frequency Of Monitoring: Monthly | Use Based Class: B | Approximate Depth(Bottom/Table): 1.00 m |
| Color & Intensity: Light Brown | Odour: Odour Free | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Ammonia-N | 0.16 | mg/l |
| BOD | 1.80 | mg/l |
| Conductivity | 69.16 | µs/cm |
| Sodium | 0.5 | mg/l |
| Sulphate | 6.74 | mg/l |
| Total Alkalinity | 50.00 | mg/l |
| Total Dissolved Solids(TDS) | 68.00 | mg/l |
| Total Fixed Solids(TFS) | 42.00 | mg/l |
| Total Hardness as CaCo3 | 48.00 | mg/l |
| Total Suspended Solids(TSS) | 88.00 | mg/l |
| Turbidity | 50.50 | NTU |
| Dissolved O2(DO) | 7.10 | mg/l |
| Fecal Coliform | 1700 | MPN/100ml |
| Nitrate-N | 1.01 | mg/l |
| pH | 7.41 | Unit |
| Boron | 2.52 | mg/l |
| Calcium | 8.82 | mg/l |
| Chloride | 2.94 | mg/l |
| COD | 34.00 | mg/l |
| Fluoride | BDL | mg/l |
| Magnesium | 7.48 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.035 | mg/l |
| Temperature(Water) | 23 | ⁰C |
| Total Coliform | 5000 | MPN/100ml |
| Potassium | 1.80 | mg/l |