Table 2.

24-Hour Urine Metal Concentrations Across Study Subjects (N = 48) and EPA Drinking Water Guidelines

Metal	Measures (ng/mL)
	mean ± SD	0%	25%	Quantiles 50%	75%	100%	EPA Drinking Water Standards
As	40.9 ± 57.2	4.35	13.61	20.69	39.53	303.16	10
Cd	0.8 ± 0.4	0.23	0.52	0.66	0.88	2.05	5
Hg	1.6 ± 1.5	0.30	0.58	1.21	1.97	8.47	2
Mn	1.4 ± 0.4	0.45	1.22	1.41	1.64	2.20	50
Pb	1.7 ± 1.0	0.39	1.06	1.43	1.99	6.19	15