Radiation Detected in Vegetables And Tap Water in Japan

A detectable amount is not necessarily a dangerous amount. While minuscule amounts may not be good, they does not mean they should cause excessive worry.

http://hosted.ap.org/dynamic/stories/A/AS_JAPAN_EARTHQUAKE?SITE=AP&SECTION=HOME&TEMPLATE=DEFAULT&CTIME=2011-03-19-08-25-18

"Repercussions of Japan's triple disaster came into clearer focus Monday after the World Bank said the earthquake and tsunami caused up to $235 billion in damage and health officials reported more cases of radiation-tainted vegetables and tap water.
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The announcement by Japan's Health Ministry late Sunday that tests had detected excess amounts of radioactive elements on canola and chrysanthemum greens marked a low moment in a day that had been peppered with bits of positive news: First, a teenager and his grandmother were found alive nine days after being trapped in their earthquake-shattered home. Then, the operator of the overheated nuclear plant said two of the six reactor units were safely cooled down."