Table 1.
Toxicity values of the water samples evaluated by the Daphia magna bioassay before and after ultrasonic treatment (UST).
| No | The Site (River, Lake, Pond) | Toxicity before UST | Toxicity after UST |
|---|---|---|---|
| 1 | Pola | 10 | 0 |
| 2 | Shelon’ | 30 | 20 |
| 3 | Veryasha | 10 | 10 |
| 4 | Ilmen’ Lake | 40 | 0 |
| 5 | Volhov-2 | 80 | 10 |
| 6 | Volhov-Novgorod | 70 | 30 |
| 7 | Tigoda | 60 | 0 |
| 8 | Perehoda | 60 | 20 |
| 9 | Nisha | 10 | 10 |
| 10 | Msta | 20 | 20 |
| 11 | Park Pobedy pond | 100 | 10 |
| 12 | Big Pond | 0 | 10 |
| 13 | Volhov-Kotovitsy | 100 | 0 |
| 14 | Vytegra | 40 | 20 |
| 15 | Volhov-Kirishi | 50 | 30 |
| 16 | Volhov–upper power plant | 30 | 10 |
| 17 | Volhov–below power plant | 10 | 10 |
| 18 | Megra | 80 | 40 |
| 19 | Tuloksa | 10 | 60 |
| 20 | Mor’e | 10 | 70 |