| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mangakarengorengo River |  | Wairoa River | -37.8190000000 | 176.0220000000 | Map | ||||||
| Omanawa River | Wairoa River | 25,000 | -37.7605750000 | 176.0715777778 | Map | ||||||
| Opuiaki River | Wairoa River | 24,000 | -37.8205805556 | 176.0392944444 | Map |