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: 15/01/2021 | Sample Time: 13:30 | |
| Human Activities: Bathing and Washing and sand recovery. | Weather: Sunny and Clear. | Water Body: Raidak |
| Frequency Of Monitoring: Monthly | Use Based Class: B | Approximate Depth(Bottom/Table): 1.00 m |
| Color & Intensity: Dark Green | Odour: Fishy | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Phosphate-P | 0.007 | mg/l |
| Potassium | 0.20 | mg/l |
| Sodium | 1.80 | mg/l |
| Sulphate | 5.36 | mg/l |
| Total Alkalinity | 14.00 | mg/l |
| Total Dissolved Solids(TDS) | 90.00 | mg/l |
| Total Fixed Solids(TFS) | 72.00 | mg/l |
| Total Hardness as CaCo3 | 48.00 | mg/l |
| Total Suspended Solids(TSS) | 18.00 | mg/l |
| Ammonia-N | 0.27 | mg/l |
| Dissolved O2(DO) | 7.80 | mg/l |
| Magnesium | 7.48 | mg/l |
| Turbidity | 3.91 | NTU |
| BOD | 1.20 | mg/l |
| Conductivity | 181.00 | µs/cm |
| Fecal Coliform | 2300 | MPN/100ml |
| Fecal Streptococci | 12 | MPN/100ml |
| Nitrate-N | 0.055 | mg/l |
| pH | 7.14 | Unit |
| Temperature(Water) | 22 | ⁰C |
| Total Coliform | 8000 | MPN/100ml |
| Boron | 1.69 | mg/l |
| Calcium | 8.81 | mg/l |
| Chloride | 1.95 | mg/l |
| COD | 28.00 | mg/l |
| Fluoride | BDL | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |