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: 05/02/2021 | Sample Time: 13:30 Hrs | |
| Human Activities: Bathing,Washing and fishing | 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 Clear | Odour: Fishy | Visible effluent discharge: MODERATE |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Fecal Streptococci | 21 | MPN/100ml |
| Boron | 0.53 | mg/l |
| Calcium | 20.04 | mg/l |
| Chloride | 2.94 | mg/l |
| COD | 22.00 | mg/l |
| Fluoride | BDL | mg/l |
| Magnesium | 3.46 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.004 | mg/l |
| Potassium | 0.30 | mg/l |
| Sodium | 2.3 | mg/l |
| Sulphate | 6.89 | mg/l |
| Total Alkalinity | 24.00 | mg/l |
| Total Dissolved Solids(TDS) | 58.00 | mg/l |
| Total Fixed Solids(TFS) | 86.00 | mg/l |
| Total Hardness as CaCo3 | 62.00 | mg/l |
| Total Suspended Solids(TSS) | 22.00 | mg/l |
| Turbidity | NTU | |
| Dissolved O2(DO) | 7.40 | mg/l |
| Nitrate-N | 0.05 | mg/l |
| pH | 7.68 | Unit |
| Total Coliform | 7000 | MPN/100ml |
| BOD | 1.20 | mg/l |
| Conductivity | 96.47 | µs/cm |
| Fecal Coliform | 2200 | MPN/100ml |
| Temperature(Water) | 23 | ⁰C |
| Ammonia-N | 0.31 | mg/l |