SN | Sediment increase (mg/l) | Risk to fish and their habitat |
1 | 0 | No risk |
2 | <25 | Very low risk |
3 | 25 - 100 | Low risk |
4 | 100 - 200 | Moderate risk |
5 | 200 - 400 | High risk |
6 | >400 | Unacceptable risk |