Table 2 Trace element levels in water, soil, and sediment from different countries/regions.

Lower reach of Jinsha River, China

N.D.–8.00

N.D.–26.00

N.D.–6.00

0.70–2.70

–

–

Water

Mar., Apr., and Jul. 2018

28.60–161.00

61.00–232.00

138.00–475.00

1.09–26.40

0.10–0.68

4.16–46.20

Soil

32.30–54.00

51.9–97.80

222.00–333.00

1.42–4.98

0.17–0.34

5.70–20.50

Sediment

Jinsha River, China³⁹

10.30–247.61

2.90–129.97

–

2.22–30.53

0.05–0.73

4.08–44.04

Sediment

May. 2017

Yellow River area, China^{28, 40, 41}

0.73–3.50

0.04–4.19

–

2.35–6.42

0.02–0.05

0.02–0.38

Water

Jul. 2011

12.23–67.98

68.93–117.76

–

5.3–16.72

0.21–1.07

17.87–63.72

Soil

–

14.1–30.3

39.3–74.6

–

–

0.1–0.3

–

Sediment

May. 2014

Yangzte River, China⁴²

11.3–920

34.1–1050

–

4.7–278

0.09–29.39

15.9–535

Sediment

Nov. 2007–Jan. 2008

Yangzte River area, China⁴³

17.31–72.50

47.87–332.40

–

–

0.02–2.72

12.14–83.85

Soil

–

Lake Pontchartrain, USA³⁵

2.15–4.2

24.7–528

–

–

0.05–0.35

–

Water

Feb. and Jun. 2009

Ganga River area, India³⁶

19.42–43.72

31.73–71.37

–

–

11.41–39.24

80.55–134.8

Water

Jul. 2012–Jun. 2013

Kharg Coral Island, Iran⁶

0.69–4.70

0.20–1.05

2.18–5.57

0.04–1.16

0.41–1.11

0.13–1.88

Seawater

Jan. 2015

13.11–26.51

7.28–30.81

9.55–38.50

0.46–3.75

0.28–2.05

0.38–1.67

Sediment