Potentially Toxic Elements and Health Risk Assessment in Farmland Systems around High-Concentrated Arsenic Coal Mining in Xingren, China

Table 2

Statistical parameters for trace element concentrations in water samples.

Parameters	Minimum	Maximum	Mean	SD	Cv (%)	Skewness	Kurtosis	GB5749-2006
Pb (μg·L^−1)	49	1328	611	0.462	75.68	−0.10	−1.59	10
As (μg·L^−1)	16	1583	766	0.527	68.85	−0.20	−1.21	10
Cu (μg·L^−1)	6.619	23.200	12.499	6.115	48.92	0.82	−0.83	1000
Cd (μg·L^−1)	0.001	0.579	0.184	0.221	120.11	0.77	−1.14	5
Cr (μg·L^−1)	0.130	3.843	1.568	1.350	86.07	0.76	−1.18	50