Table 3.

Correlations of metal concentrations in biomarkers to concentrations in groundwater.

Biomarker	As	Ba	Cr	Mn	Fe	Co	Ni	Cu	Zn	Mo	Pb
Hair	0.633 **	0.646 **	−0.388 **	0.234 **	0.595 **	0.149	−0.287 **	−0.017	0.132	0.555 **	0.027
Nail	0.544 **	0.306 **	−0.111	−0.073	0.296 **	−0.176 **	−0.202 **	−0.076	0.008	0.082	−0.004
Urine	0.243 **	−0.104	0.018	0.008	0.033	0.112	−0.014	−0.103	−0.014	0.122	0.031

** Correlation is significant at the 0.01 level (2-tailed).