Months of the year

River-Ase

Warri River

River Ethiope

Pb (PPM)

Zn (PPM)

Fe (PPM)

Pb (PPM)

Zn (PPM)

Fe (PPM)

Pb (PPM)

Zn (PPM)

Fe (PPM)

Jan.

<0.01

1.61

4.56*

0.001

1.21

0.96*

0.001

0.04

0.01

Feb.

<0.01

1.87

4.05*

0.001

1.01

0.92*

0.002

0.21

0.01

Mar.

<0.01

1.72

4.08*

0.002

0.96

0.62*

0.007

0.36

0.01

Apr.

<0.01

0.67

4.74*

<0.001

0.46

0.28

0.001

0.46

0.02

May

<0.01

0.66

4.43*

<0.001

0.16

0.24

0.02*

0.51

0.05

June

<0.01

0.76

4.33*

<0.001

0.56

1.02*

0.001

0.41

0.04

July

<0.01

0.77

4.09*

0.002

0.42

2.01*

0.027*

0.41

0.00

Aug.

<0.01

0.67

3.65*

0.001

0.24

1.04*

0.001

0.36

0.07

Sep.

<0.01

0.84

2.57*

0.002

0.16

0.94*

0.01

0.01

0.01

Oct.

<0.01

0.96

2.36*

0.001

1.31

0.76*

0.01

0.01

0.03

Nov.

<0.01

0.92

2.27*

0.002

1.42

0.82*

0.02*

0.01

0.01

Dec.

<0.01

0.92

2.09*

0.001

1.26

0.72*

0.02*

0.02

0.02

RANGE

<0.01

1.21

2.65

0.002

1.26

1.77

0.009

0.50

0.06

X

<0.01

1.03

3.60

0.001

0.76

0.85

0.01

0.23

0.02

WHO

0.01

3.00

0.30

0.01

3.00

0.30

0.01

3.00

0.30