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: 29/04/2021 | Sample Time: 10:40 | |
| Human Activities: None | 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 Brown and moderately turbid | Odour: Fishy | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Ammonia-N | BDL | mg/l |
| BOD | 0.80 | mg/l |
| Conductivity | 120.10 | µs/cm |
| Dissolved O2(DO) | 7.40 | mg/l |
| Fecal Coliform | 2200 | MPN/100ml |
| Total Coliform | 9000 | MPN/100ml |
| Boron | 1.16 | mg/l |
| Calcium | 16.83 | mg/l |
| Chloride | 7.83 | mg/l |
| COD | 22.00 | mg/l |
| Fluoride | 0.11 | mg/l |
| Magnesium | 4.61 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.004 | mg/l |
| Potassium | 1.60 | mg/l |
| Sodium | 2.80 | mg/l |
| Sulphate | 5.89 | mg/l |
| Total Alkalinity | 70.00 | mg/l |
| Total Dissolved Solids(TDS) | 64.00 | mg/l |
| Total Fixed Solids(TFS) | 76.00 | mg/l |
| Total Hardness as CaCo3 | 52.00 | mg/l |
| Total Suspended Solids(TSS) | 12.00 | mg/l |
| Turbidity | 2.40 | NTU |
| Arsenic | BDL | mg/l |
| Cadmium | BDL | mg/l |
| Chromium Total | BDL | mg/l |
| Copper | BDL | mg/l |
| Iron | BDL | mg/l |
| Lead | BDL | mg/l |
| Mercury | BDL | mg/l |
| Nickel | BDL | mg/l |
| Zinc | BDL | mg/l |
| a-BHC | ppb | |
| a-Endosulphan | ppb | |
| Aldrin | ppb | |
| Anilophos | ppb | |
| b-Endosulphan | ppb | |
| Chlorpyriphos | ppb | |
| Dieldrin | ppb | |
| g-BHC | ppb | |
| Malathion | ppb | |
| Methyl Parathion | ppb | |
| o,p-DDT | ppb | |
| p,p-DDT | ppb | |
| Fecal Streptococci | 11 | MPN/100ml |
| Nitrate-N | 0.22 | mg/l |
| pH | 7.15 | Unit |
| Temperature(Water) | 29 | ⁰C |