Class

Value

Sediment pollution intensity

1

0 ≤ IPS < 2

Healthy sediment

2

2 ≤ IPS < 5

Slightly polluted sediment

3

5 ≤ IPS < 10

Moderately polluted sediment

4

10 ≤ IPS < 20

Very polluted sediment

5

20 ≤ IPS

Dangerous sediment