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: 29/05/2020 | Sample Time: 14:10 Hrs | |
| Human Activities: Bathing and Washing. | Weather: Sunny | Water Body: Raidak |
| Frequency Of Monitoring: Monthly | Use Based Class: B | Approximate Depth(Bottom/Table): 1.00 m |
| Color & Intensity: Light Green and Moderately Turbid | Odour: Fishy | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Total Suspended Solids(TSS) | 18.00 | mg/l |
| Total Alkalinity | 84.00 | mg/l |
| Total Dissolved Solids(TDS) | 30.00 | mg/l |
| Conductivity | 88.43 | µs/cm |
| Dissolved O2(DO) | 6.80 | mg/l |
| Fecal Coliform | 2100 | MPN/100ml |
| Nitrate-N | mg/l | |
| pH | 6.90 | Unit |
| Temperature(Water) | 28 | ⁰C |
| Total Coliform | 8000 | MPN/100ml |
| Boron | 3.81 | mg/l |
| Calcium | 23.24 | mg/l |
| Chloride | 7.83 | mg/l |
| COD | 18.00 | mg/l |
| Fluoride | mg/l | |
| Magnesium | 16.70 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.018 | mg/l |
| Potassium | 0.20 | mg/l |
| Sodium | 1.10 | mg/l |
| Sulphate | 13.86 | mg/l |
| Total Fixed Solids(TFS) | mg/l | |
| Total Hardness as CaCo3 | 116.0 | mg/l |
| Ammonia-N | mg/l | |
| Turbidity | NTU | |
| BOD | 1.30 | mg/l |