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: 25/01/2022 | Sample Time: 15:05 | |
| Human Activities: Bathing and Washing . | 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 green and moderately turbid | Odour: Fishy | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Ammonia-N | BDL | mg/l |
| BOD | 1.60 | mg/l |
| Conductivity | 141.30 | µs/cm |
| Dissolved O2(DO) | 7.90 | mg/l |
| Fecal Coliform | 5000 | MPN/100ml |
| Fecal Streptococci | 94 | MPN/100ml |
| Nitrate-N | 0.03 | mg/l |
| pH | 6.89 | Unit |
| Temperature(Water) | 17 | ⁰C |
| Total Coliform | 14000 | MPN/100ml |
| Boron | 1.73 | mg/l |
| Calcium | 24.04 | mg/l |
| Chloride | 5.87 | mg/l |
| COD | 18.00 | mg/l |
| Fluoride | BDL | mg/l |
| Magnesium | 17.07 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.002 | mg/l |
| Potassium | 1.00 | mg/l |
| Sodium | 1.50 | mg/l |
| Sulphate | 7.42 | mg/l |
| Total Alkalinity | 102.00 | mg/l |
| Total Dissolved Solids(TDS) | 84.00 | mg/l |
| Total Fixed Solids(TFS) | 24.00 | mg/l |
| Total Hardness as CaCo3 | 154.0 | mg/l |
| Total Suspended Solids(TSS) | 10.00 | mg/l |
| Turbidity | 2.38 | NTU |