S/N

Terms of index

Values

Rating of water Quality

River Ase

Warri River

River Ethiope

1.

Scope = F₁

33.3

33.3

33.3

Water quality in River Ase is marginal and impaired and departs from desirable levels. While River Ethiope and Warri River, the water quality is fair but occasionally impaired and sometimes depart from desirable levels.

2.

Frequency = F₂

33.3

27.7

11.1

3.

nSe

3.6

0.628

0.13

4.

Amplitude = F₃

78.26

38.57

11.5

5.

WQI

47.3

66.52

78.7