Table 4.

Potential dose (μg/kg/day) of inorganic and total As based on dietary and water As intake^a among non-seafood eaters, stratified by tap water As concentration in NHEXAS-AZ, BAsES-AZ and NHANES 2003–04.

	NHEXAS-AZ				BAsES-AZ				NHANES 2003–04a
	Tap water As (p.p.b.)				Tap water As (p.p.b.)				Tap water As (p.p.b.)
	≤3	≤5	≤10	>10	≤3	≤5	≤10	>10	2.4
Subjects, N	51	128	176	35	31	73	138	54	2114
Inorganic As dose
Median	0.19	0.17	0.20	0.50	0.14	0.13	0.17	0.42	0.13
75th percentile	0.31	0.32	0.35	0.90	0.24	0.22	0.25	1.04	0.20
90th percentile	0.48	0.48	0.48	1.81	0.42	0.42	0.42	7.69	0.31
95th percentile	0.61	0.56	0.60	2.08	0.67	0.69	0.66	22.34	0.39
% >2.1 μg/kg/dayb	0	0	0	2.86	0	0	0	14.81	0
Total As dose
Median	1.17	0.82	0.94	1.34	0.53	0.38	0.41	0.84	0.49
75th percentile	1.72	1.57	1.57	1.84	0.75	0.62	0.60	1.41	0.81
90th percentile	1.96	1.96	1.96	2.75	1.12	1.45	0.98	7.80	1.22
95th percentile	2.98	2.80	2.75	3.99	2.67	2.42	1.78	22.52	1.64
% >2.1 μg/kg/dayb	7.84	7.81	7.96	17.14	0.68	8.22	4.34	22.22	2.60

^aAs concentration in drinking and cooking water in NHEXAS/ABS and BAsES based on measured concentrations in water samples; national average tap water As was used to calculate exposure and dose in NHANES.²⁷

^b2.1 μg/kg/day was the provisional tolerable daily intake (PTDI) for inorganic As proposed by WHO in 1983 and withdrawn in 2011.⁷