Table 5.

Blood and urine metal levels (μg/L) in China National Human Biomonitoring in 2017–2018 (n = 5884).

Metal	Geometric mean	<LOD (%)^a	P₁₀	P₂₅	Median	P₇₅	P₉₀
Blood sample (n = 5884)
Lead	19.83	0.48	10.94	14.37	19.93	27.63	38.80
Cadmium	0.48	3.06	0.09	0.19	0.43	1.10	3.78
Mercury	1.00	1.84	0.28	0.55	1.05	2.11	3.64
Arsenic	0.90	4.66	0.26	0.56	0.95	1.79	3.14
Chromium	0.44	10.27	<LOD	0.22	0.41	1.13	2.16
Urine Sample (n = 5859)
Lead	0.58	10.99	<LOD	0.45	0.89	1.49	2.23
Cadmium	0.32	4.30	0.06	0.13	0.34	0.82	1.72
Mercury	0.20	17.96	<LOD	0.08	0.22	0.60	1.46
Arsenic	18.61	0.39	6.12	10.79	19.00	33.44	55.35
Chromium	0.37	22.46	<LOD	0.15	0.38	0.72	1.22

The limit of determination for lead, cadmium, mercury, arsenic, and chromium in blood was 0.035 μg/L, 0.025 μg/L, 0.01 μg/L, 0.04 μg/L, and 0.05 μg/L; it was 0.01 μg/L, 0.02 μg/L, 0.015 μg/L, 0.10 μg/L, and 0.10 μg/L for urine.