West Bengal Pollution Control Board |
Siliguri Laboratory |
Paribesh Bhawan, Paribahan Nagar, P.O. Matigara, Siliguri,Darjeeling 734 428. |
| Station: MAHANANDA AT SILIGURI | River Basin: Mahananda | CPCB Station Code: 1946 |
| Sample Date: 20/04/2022 | Sample Time: 10.00 | |
| Human Activities: None | Weather: Sunny and Clear. | Water Body: Mahananda at Siliguri |
| Frequency Of Monitoring: Quarterly | Use Based Class: C | Approximate Depth(Bottom/Table): 1.00 m |
| Color & Intensity: Light Brown and ModeratelyTurbid | Odour: Fishy | Visible effluent discharge: Moderate |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Nitrate-N | 0.63 | mg/l |
| Sulphate | 21.74 | mg/l |
| Mercury | BDL | mg/l |
| o,p-DDT | BDL | ppb |
| pH | 6.80 | Unit |
| Fecal Coliform | 5000 | MPN/100ml |
| Fecal Streptococci | 33 | MPN/100ml |
| Temperature(Water) | 26 | ⁰C |
| Total Coliform | 28000 | MPN/100ml |
| Boron | 9.56 | mg/l |
| Calcium | 27.20 | mg/l |
| Chloride | 11.74 | mg/l |
| COD | 9.00 | mg/l |
| Fluoride | 0.20 | mg/l |
| Magnesium | 1.46 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.025 | mg/l |
| Potassium | 5.00 | mg/l |
| Sodium | 13.90 | mg/l |
| Total Alkalinity | 74.00 | mg/l |
| Total Dissolved Solids(TDS) | 117.00 | mg/l |
| Total Fixed Solids(TFS) | 102.0 | mg/l |
| Total Hardness as CaCo3 | 74.00 | mg/l |
| Total Suspended Solids(TSS) | 9.00 | mg/l |
| Turbidity | 7.28 | NTU |
| Arsenic | BDL | mg/l |
| Cadmium | BDL | mg/l |
| Chromium Total | BDL | mg/l |
| Copper | BDL | mg/l |
| Iron | 0.38 | mg/l |
| Lead | 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 |
| p,p-DDT | BDL | ppb |
| Ammonia-N | 0.12 | mg/l |
| Conductivity | 204.30 | µs/cm |
| BOD | 2.80 | mg/l |
| Dissolved O2(DO) | 6.50 | mg/l |