Isotopic Tracing of Perchlorate Sources in the Environment

Table 2

The global pollution situation of perchlorate.

Area	Sample concentration (µg/L)	Drinking water concentration (µg/L)
EPA recommend		15
USA	4–420 (public water)
Japan	340∼2300 (river water)	10
South Korea	60 (river water)	35
India	1.0 (groundwater)
North Korea	<1.0∼6.1 µg/L (tap water)	<1.0∼6.1 µg/L
German	0.79∼2.38 (groundwater)