Table 1.

Distribution of lead concentration in tap water samples in Japan

Concentration (mg/kg)	≤0.001	≤0.002	≤0.003	≤0.004	≤0.005	≤0.006	≤0.007	≤0.008	≤0.009	≤0.01	>0.01	Total
Number of samples	4,868	198	71	40	24	21	11	11	7	4	1	5,256

Data source: Database of Water Quality of Aqueduct, 2008: http://www.jwwa.or.jp/mizu/index.html