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: 11/12/2020 | Sample Time: 13:30 | |
| Human Activities: Bathing and Washing . | 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 | Odour: Odour Free | Visible effluent discharge: Moderate |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| BOD | 1.20 | mg/l |
| Ammonia-N | 0.24 | mg/l |
| Conductivity | 88.73 | µs/cm |
| Dissolved O2(DO) | 7.20 | mg/l |
| Fecal Coliform | 2700 | MPN/100ml |
| Fecal Streptococci | 2 | MPN/100ml |
| Nitrate-N | 0.025 | mg/l |
| pH | 7.48 | Unit |
| Temperature(Water) | 23 | ⁰C |
| Total Coliform | 8000 | MPN/100ml |
| Boron | 1.935 | mg/l |
| Calcium | 28.85 | mg/l |
| Chloride | 0.98 | mg/l |
| COD | 32.00 | mg/l |
| Fluoride | 0.12 | mg/l |
| Total Alkalinity | 96.00 | mg/l |
| Magnesium | 10.36 | mg/l |
| Total Hardness as CaCo3 | 108.00 | mg/l |
| Sodium | 0.90 | mg/l |
| Sulphate | 12.43 | mg/l |
| Phosphate-P | 0.020 | mg/l |
| Potassium | 0.20 | mg/l |
| Total Dissolved Solids(TDS) | 102.00 | mg/l |
| Total Fixed Solids(TFS) | 250.00 | mg/l |
| Total Suspended Solids(TSS) | 56.00 | mg/l |
| Turbidity | 1.82 | NTU |
| Phenolpthalein Alkanity | NIL | mg/l |