| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Anza (river) | Toce | 35,000 | 46.0000000000 | 8.2833333300 | Map | ||||||
| Bogna | 3 | 90,000,000 | Toce | 46.1291500000 | 8.2971390000 | Map | |||||
| Diveria |  | 9 | 1,210 | Toce | 37,700 | 46.2508330000 | 8.0388890000 | Map | |||
| Melezzo Occidentale | 2 | Toce | 13,000 | 46.1802777800 | 8.7572222200 | Map | |||||
| Ovesca |  | 6 | 147,980,000 | Toce | 26,500 | 46.0679070000 | 8.2817750000 | Map |