Process Parameter

Aeration

Pretreatment: Sedimentation

Coagulation

Coarse Filtration

Rapid Filtration

Slow Filtration

Chlorination

Turbidity

0

2

3

2

3

4

0

Bacteria

0

1-2

0-1

2-3

2

4

4

Color

0

1

3

1-2

1

2

2

Odor & Taste

2

1

1

2

2

2

1

Organic Substances

1

2

1

3

3

4

4

Iron & Manganese

2

1

1

3*

4*

4

0