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: 26/03/2021 | Sample Time: 12:30 Hrs | |
| Human Activities: Fishing,Bathing. | Weather: Sunny | Water Body: Raidak |
| Frequency Of Monitoring: Monthly | Use Based Class: B | Approximate Depth(Bottom/Table): 1.00 m |
| Color & Intensity: Moderately Brown and Moderately Turbid. | Odour: Fishy | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Conductivity | 88.05 | µs/cm |
| Dissolved O2(DO) | 7.50 | mg/l |
| Fecal Coliform | 1700 | MPN/100ml |
| Fecal Streptococci | 17 | MPN/100ml |
| Nitrate-N | 0.06 | mg/l |
| pH | 7.41 | Unit |
| Temperature(Water) | 29 | ⁰C |
| Total Coliform | 5000 | MPN/100ml |
| Boron | 0.96 | mg/l |
| Calcium | 24.04 | mg/l |
| Chloride | 2.93 | mg/l |
| COD | 32.00 | mg/l |
| Fluoride | 0.12 | mg/l |
| Magnesium | 10.94 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.006 | mg/l |
| Potassium | 0.40 | mg/l |
| Sodium | 2.4 | mg/l |
| Sulphate | 6.31 | mg/l |
| Total Alkalinity | 94.0 | mg/l |
| Total Dissolved Solids(TDS) | 68.00 | mg/l |
| Total Fixed Solids(TFS) | 14.00 | mg/l |
| Total Hardness as CaCo3 | 98.00 | mg/l |
| Total Suspended Solids(TSS) | 20.00 | mg/l |
| Turbidity | 3.89 | NTU |
| Ammonia-N | 0.22 | mg/l |
| BOD | 1.80 | mg/l |