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: 28/07/2021 | Sample Time: 12:45 | |
| Human Activities: None | Weather: Sunny and humid | Water Body: Raidak |
| Frequency Of Monitoring: Monthly | Use Based Class: B | Approximate Depth(Bottom/Table): 1.00 m |
| Color & Intensity: Light Brown and moderately turbid | Odour: Fishy | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Dissolved O2(DO) | 7.20 | mg/l |
| Fecal Coliform | 1700 | MPN/100ml |
| Fecal Streptococci | 21 | MPN/100ml |
| Total Coliform | 5000 | MPN/100ml |
| Boron | 1.53 | mg/l |
| Calcium | 4.61 | mg/l |
| Chloride | 4.89 | mg/l |
| COD | 12.00 | mg/l |
| Fluoride | 0.33 | mg/l |
| Magnesium | 4.61 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.002 | mg/l |
| Potassium | 0.90 | mg/l |
| Sodium | 2.8 | mg/l |
| Sulphate | 9.29 | mg/l |
| Total Alkalinity | 84.00 | mg/l |
| Total Dissolved Solids(TDS) | 28.00 | mg/l |
| Total Fixed Solids(TFS) | 46.00 | mg/l |
| Total Hardness as CaCo3 | 78.00 | mg/l |
| Total Suspended Solids(TSS) | 16.00 | mg/l |
| Turbidity | 6.70 | NTU |
| Ammonia-N | BDL | mg/l |
| BOD | 1.90 | mg/l |
| Conductivity | 51.11 | µs/cm |
| Nitrate-N | 0.09 | mg/l |
| pH | 7.02 | Unit |
| Temperature(Water) | 29 | ⁰C |