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: 20/03/2020 | Sample Time: 12:30 Hrs | |
| Human Activities: Bathing,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 Slightly Turbid | Odour: Fishy | Visible effluent discharge: None. |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Ammonia-N | mg/l | |
| BOD | 1.30 | mg/l |
| Conductivity | 164.00 | µs/cm |
| Dissolved O2(DO) | 7.20 | mg/l |
| Fecal Coliform | MPN/100ml | |
| Nitrate-N | mg/l | |
| pH | 7.60 | Unit |
| Total Coliform | MPN/100ml | |
| Boron | 4.39 | mg/l |
| Calcium | 16.83 | mg/l |
| Chloride | 8.81 | mg/l |
| COD | 18.00 | mg/l |
| Fluoride | mg/l | |
| Magnesium | 4.61 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.001 | mg/l |
| Potassium | 0.40 | mg/l |
| Sodium | 1.80 | mg/l |
| Sulphate | 10.14 | mg/l |
| Total Alkalinity | 90.00 | mg/l |
| Total Dissolved Solids(TDS) | 110.00 | mg/l |
| Total Fixed Solids(TFS) | mg/l | |
| Total Hardness as CaCo3 | 58.00 | mg/l |
| Total Suspended Solids(TSS) | 10.00 | mg/l |
| Turbidity | NTU | |
| Temperature | 27 | ⁰C |