Element

Confidence limits range

[6] [11] [13]

Background concentrations in fresh surface waters

Yaroshevsky, Korzh [17] [18]

Markert, Gaillardet [19] [20]

Na

3.3 - 3.6

5 - 5.3

5

K

0.9 - 1.0

1.5 - 2

2

Ca

15.5 - 16.4

12 - 14

2

Al

0.04 - 1.0

50 - 160

30 - 200

Cr

0.03 - 0.09

1

0.7 - 1

Mn

0.01 - 0.53

8 - 10

5 - 34

Fe

0.1 - 1.6

40

66 - 500

Cu

0.2 - 1

1.5 - 7

1.5 - 3

Zn

0.4 - 4.3

0.15 - 20

0.6 - 5

As

0.3 - 0.5

1.7 - 2

0.5 - 0.6

Mo

0.8 - 1.5

0.5 - 1

0.4 - 1

Hg

0.0001 - 0.0014

0.07

0.1

Pb

0.03 - 0.06

0.1 - 1

0.08 - 3