West Bengal Pollution Control Board |
Siliguri Laboratory |
Paribesh Bhawan, Paribahan Nagar, P.O. Matigara, Siliguri,Darjeeling 734 428. |
| Station: MIRIKH LAKE | River Basin: Tista | CPCB Station Code: 2520 |
| Sample Date: 22/04/2022 | Sample Time: 14:45 | |
| Human Activities: None | Weather: Cloudy,Foggy and Rainy. | Water Body: Mirikh lake |
| Frequency Of Monitoring: Quarterly | Use Based Class: C | Approximate Depth(Bottom/Table): 2.00 m |
| Color & Intensity: Dark Green and Turbid | Odour: Septic. | Visible effluent discharge: Moderate |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| BOD | 2.90 | mg/l |
| Dissolved O2(DO) | 6.60 | mg/l |
| Fecal Coliform | 2000 | MPN/100ml |
| Nitrate-N | 0.59 | mg/l |
| pH | 6.86 | Unit |
| Temperature(Water) | 15 | ⁰C |
| Total Coliform | 4000 | MPN/100ml |
| Boron | 3.48 | mg/l |
| Calcium | 12.82 | mg/l |
| Chloride | 11.74 | mg/l |
| COD | 28.00 | mg/l |
| Fluoride | BDL | mg/l |
| Magnesium | 7.48 | mg/l |
| Phosphate-P | 0.008 | mg/l |
| Potassium | 7.40 | mg/l |
| Sodium | 17.10 | mg/l |
| Sulphate | 5.49 | mg/l |
| Total Alkalinity | 54.00 | mg/l |
| Total Dissolved Solids(TDS) | 86.00 | mg/l |
| Total Fixed Solids(TFS) | 124.00 | mg/l |
| Total Hardness as CaCo3 | 46.00 | mg/l |
| Total Suspended Solids(TSS) | 42.00 | mg/l |
| Turbidity | 16.70 | NTU |
| Arsenic | BDL | mg/l |
| Cadmium | BDL | mg/l |
| Copper | BDL | mg/l |
| Iron | 0.61 | 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 |
| g-BHC | BDL | ppb |
| Malathion | BDL | ppb |
| Methyl Parathion | BDL | ppb |
| o,p-DDT | BDL | ppb |
| p,p-DDT | BDL | ppb |
| Ammonia-N | 0.14 | mg/l |
| Conductivity | 160.70 | µs/cm |
| Phenolpthalein Alkanity | NIL | mg/l |
| Chromium Total | BDL | mg/l |
| Dieldrin | BDL | ppb |