Element

Max µg/L

No. of wells

%No. of wells

Valley names and Well code

Relationship to standards

Cr

32

3

1.8

Zaher and Shemeisi(SM3, SM7, SM8)

Within standards

Co

5.7

1

1

WadiNoman, (A2)

Not mentioned in standards

Cu

4.8

2

1.2

Kakia and Sabahani(S3, S4, S5, S6, S7)

Within standards

As

50

2

1.2

Zaher and Shemeisi(SM3, SM8)

Exceeds SASO, WHO, and EU standards

Se

42

2

1.2

WadiNoman(A1, A2)

Exceeds WHO and EU standards

Cd

0.31

3

1.8

Zaher and Shemeisi(SM5, SM9, L2)

Within standards

Ba

44

1

1

WadiNoman, (A2)

Within standards

Hg

1.2

1

1

WadiNoman, (A17)

Exceeds all standards

Pb

0.98

1

1

Ryan, WadiAlkheif, (F2)

Within standards