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: 27/08/2021 | Sample Time: 13:20 | |
| 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 Brown and moderately turbid | Odour: Fishy | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Ammonia-N | BDL | mg/l |
| BOD | 1.40 | mg/l |
| Conductivity | 60.10 | µs/cm |
| Dissolved O2(DO) | 7.40 | mg/l |
| Fecal Coliform | 2100 | MPN/100ml |
| Fecal Streptococci | 17 | MPN/100ml |
| Nitrate-N | 0.08 | mg/l |
| pH | 7.80 | Unit |
| Temperature(Water) | 28 | ⁰C |
| Total Coliform | 7000 | MPN/100ml |
| Boron | 1.28 | mg/l |
| Calcium | 8.81 | mg/l |
| Chloride | 0.97 | mg/l |
| COD | 18.00 | mg/l |
| Fluoride | 0.13 | mg/l |
| Magnesium | 7.48 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.001 | mg/l |
| Potassium | 0.3 | mg/l |
| Sodium | 0.5 | mg/l |
| Sulphate | 6.19 | mg/l |
| Total Alkalinity | 54.0 | mg/l |
| Total Dissolved Solids(TDS) | 20.00 | mg/l |
| Total Fixed Solids(TFS) | 1080.00 | mg/l |
| Total Hardness as CaCo3 | 48.00 | mg/l |
| Total Suspended Solids(TSS) | 12.00 | mg/l |
| Turbidity | 498.00 | NTU |