| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| King's Sedgemoor Drain |  | River Parrett | 51.1617000000 | -2.9886100000 | Map | ||||||
| River Cary (Somerset) |  | River Parrett | 56,000 | 51.1611000000 | -2.9883300000 | Map | |||||
| River Huntspill |  | River Parrett | 8,000 | 51.2081000000 | -3.0144400000 | Map | |||||
| River Isle |  | River Parrett | 23,000 | 51.0089000000 | -2.8319400000 | Map | |||||
| River Tone |  | 414,000,000 | Brendon Hills | River Parrett | 33,000 | 51.0672000000 | -2.9172200000 | Map |