Item

None

Light

Moderate

Heavy

Lumps of new and old tar

Oil

Faces

Seaweeds

General litter

Harmful litter

Sewage

0

0

0

0

0

0

0

1

1

1

1

1

1

1

2

2

2

2

2

2

2

3

3

3

3

3

3

3