| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Härpö å |  | Kokemäenjoki | 34,000 | 61.4898333300 | 21.8601000000 | Map | |||||
| Sonnilanjoki | Kokemäenjoki | 22,000 | 61.2333300000 | 22.3833300000 | Map | ||||||
| Sammunjoki |  | Kokemäenjoki | 53,600 | 61.2000000000 | 22.6666700000 | Map | |||||
| Ala-Kauvatsan joki |  | Kokemäenjoki | 2,973 | 61.2551166667 | 22.5795333333 | Map | |||||
| Loimijoki |  | 3,137,999,872 | Kokemäenjoki | 114,000 | 60.7980555556 | 23.6966666667 | Map |