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: 09/06/2022 | Sample Time: 12:50 | |
| Human Activities: None | Weather: Cloudy | Water Body: Raidak |
| Frequency Of Monitoring: Monthly | Use Based Class: B | Approximate Depth(Bottom/Table): 1.00 m |
| Color & Intensity: Light Ash and turbid | Odour: Fishy | Visible effluent discharge: Moderate |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Ammonia-N | 0.17 | mg/l |
| BOD | 2.40 | mg/l |
| Conductivity | 199.07 | µs/cm |
| Dissolved O2(DO) | 7.10 | mg/l |
| Fecal Coliform | 17000 | MPN/100ml |
| Fecal Streptococci | 23 | MPN/100ml |
| Nitrate-N | 0.37 | mg/l |
| pH | 6.97 | Unit |
| Temperature(Water) | 27 | ⁰C |
| Total Coliform | 28000 | MPN/100ml |
| Boron | 2.87 | mg/l |
| Calcium | 29.60 | mg/l |
| Chloride | 2.93 | mg/l |
| COD | 5.20 | mg/l |
| Fluoride | BDL | mg/l |
| Magnesium | 4.86 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.011 | mg/l |
| Potassium | 3.00 | mg/l |
| Sodium | 5.30 | mg/l |
| Sulphate | 11.61 | mg/l |
| Total Alkalinity | 100.00 | mg/l |
| Total Dissolved Solids(TDS) | 96.00 | mg/l |
| Total Fixed Solids(TFS) | 232.00 | mg/l |
| Total Hardness as CaCo3 | 94.00 | mg/l |
| Total Suspended Solids(TSS) | 36.00 | mg/l |
| Turbidity | 44.50 | NTU |