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| Seomjin River | Taehwa River | Hyeongsan River | Nakdong River | Average | |
|---|---|---|---|---|---|
| Station 1 | 2.197 | 2.073 | 1.755 | 1.777 | 1.951 |
| Station 2 | 2.182 | 1.941 | 1.709 | 1.734 | 1.892 |
| Station 3 | 2.125 | 1.631 | 1.691 | 1.465 | 1.728 |
| Station 4 | 2.105 | 1.443 | 1.102 | 1.008 | 1.415 |
| Overall SI index | 3.48 | 3.067 | 2.954 | 2.864 | – |
