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: 26/04/2022 | Sample Time: 11:50 | |
| Human Activities: Bathing and Washing and Fishing. | 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 | Odour: Fishy | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Ammonia-N | 0.13 | mg/l |
| BOD | 1.80 | mg/l |
| Conductivity | 188.90 | µs/cm |
| Dissolved O2(DO) | 8.20 | mg/l |
| Fecal Coliform | 17000 | MPN/100ml |
| Fecal Streptococci | 7.8 | MPN/100ml |
| Nitrate-N | 1.60 | mg/l |
| pH | 6.63 | Unit |
| Temperature(Water) | 28 | ⁰C |
| Total Coliform | 22000 | MPN/100ml |
| Boron | 14.03 | mg/l |
| Calcium | 29.60 | mg/l |
| Chloride | 1.95 | mg/l |
| COD | 19.00 | mg/l |
| Fluoride | BDL | mg/l |
| Magnesium | 4.86 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.002 | mg/l |
| Potassium | 4.20 | mg/l |
| Sodium | 6.20 | mg/l |
| Sulphate | 10.53 | mg/l |
| Total Alkalinity | 94.00 | mg/l |
| Total Dissolved Solids(TDS) | 115.00 | mg/l |
| Total Fixed Solids(TFS) | 56.00 | mg/l |
| Total Hardness as CaCo3 | 94.00 | mg/l |
| Total Suspended Solids(TSS) | 40.0 | mg/l |
| Turbidity | 1.24 | NTU |
| Arsenic | BDL | mg/l |
| Cadmium | BDL | mg/l |
| Chromium Total | BDL | mg/l |
| Copper | BDL | mg/l |
| Iron | 0.23 | mg/l |
| Lead | BDL | mg/l |
| Mercury | BDL | mg/l |
| Nickel | BDL | mg/l |
| Zinc | BDL | mg/l |
| a-BHC | BDL | ppb |
| a-Endosulphan | BDL | ppb |
| Aldrin | BDL | ppb |
| Anilophos | BDL | ppb |
| b-Endosulphan | BDL | ppb |
| Chlorpyriphos | BDL | ppb |
| Dieldrin | BDL | ppb |
| g-BHC | BDL | ppb |
| Malathion | BDL | ppb |
| Methyl Parathion | BDL | ppb |
| o,p-DDT | BDL | ppb |
| p,p-DDT | BDL | ppb |