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: 09/08/2019 | Sample Time: 12:30 | |
| 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: Clear and Moderately Green | Odour: Odour free | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Total Dissolved Solids(TDS) | 48.00 | mg/l |
| Ammonia-N | BDL | mg/l |
| BOD | 1.50 | mg/l |
| Conductivity | 198.80 | µs/cm |
| Dissolved O2(DO) | 6.90 | mg/l |
| Fecal Coliform | 3300 | MPN/100ml |
| Nitrate-N | 0.58 | mg/l |
| pH | 8.43 | Unit |
| Temperature | 29 | ⁰C |
| Total Coliform | 14000 | MPN/100ml |
| Boron | 0.017 | mg/l |
| COD | 24.22 | mg/l |
| Fluoride | BDL | mg/l |
| Magnesium | 4.61 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.002 | mg/l |
| Potassium | 0.90 | mg/l |
| Sodium | 1.20 | mg/l |
| Sulphate | 10.92 | mg/l |
| Total Fixed Solids(TFS) | 142.00 | mg/l |
| Total Hardness as CaCo3 | 58.0 | mg/l |
| Total Kjeldahl Nitrogen(TKN) | mg/l | |
| Total Suspended Solids(TSS) | 62.00 | mg/l |
| Total Alkalinity | 90.00 | mg/l |
| Calcium | 16.83 | mg/l |
| Chloride | 8.81 | mg/l |
| Turbidity | 1.79 | NTU |