@kamomep34 @KazMiyazaki @minx_nora @shijyurou ここではダメですか？ → EPA(United States Environmental Protection Agency)
Elevated levels of radioactive material in rainwater have been expected as a result of the Japanese nuclear incident. Since radiation is known to travel in the atmosphere - precipitation data collected in several states show elevated levels of radiation in recent precipitation events. In all cases these are levels above the normal background levels historically reported in these areas. While short-term elevations such as these do not raise public health concerns – and the levels seen in rainwater are expected to be relatively short in duration - the U.S. EPA has taken steps to increase the level of monitoring of precipitation, drinking water, and other potential exposure routes to continue to verify that.