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: 26/02/2020 | Sample Time: 14:10 Hrs | |
| 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: Moderately Brown and Slightly Turbid | Odour: None | Visible effluent discharge: Moderate |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| BOD | 1.30 | mg/l |
| Ammonia-N | 0.16 | mg/l |
| Conductivity | 181.40 | µs/cm |
| Dissolved O2(DO) | 8.20 | mg/l |
| Nitrate-N | 0.95 | mg/l |
| pH | 7.85 | Unit |
| Temperature | 21 | ⁰C |
| Total Coliform | 3300 | MPN/100ml |
| Calcium | 22.44 | mg/l |
| Chloride | 4.89 | mg/l |
| COD | 20.0 | mg/l |
| Fluoride | BDL | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.001 | mg/l |
| Potassium | 0.70 | mg/l |
| Sodium | 2.40 | mg/l |
| Sulphate | 6.76 | mg/l |
| Total Dissolved Solids(TDS) | 210.00 | mg/l |
| Total Fixed Solids(TFS) | 158.00 | mg/l |
| Total Hardness as CaCo3 | 100.00 | mg/l |
| Total Suspended Solids(TSS) | 14.00 | mg/l |
| Fecal Coliform | 1700 | MPN/100ml |
| Boron | 4.38 | mg/l |
| Magnesium | 12.67 | mg/l |
| Turbidity | 13.30 | NTU |
| Total Alkalinity | 94.00 | mg/l |