Assessment of Exposure Doses and Decontamination
（2013）
ＱHow is radioactivity measured in drinking water? What are the results?
ＡThe concentration of radioactive cesium etc. in drinking water (tap water, drinkable well water) is inspected by Fukushima and the other prefectures.
According to recent results, there is no drinking water that contains radioactive cesium higher than the standard value (10 Bq/kg)
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Fig.1 Distribution map of radioactive iodine (131I) just after the accident (March 21, 2011)
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Fig.2 Present distribution map of radioactive cesium and iodine
According to the results of radiation monitoring conducted by Food Safty and Environmental Hygiene Division, Fukushima Prefecture, ther has no tap water that contains radioactive iodene and cesium over the limit after May5, 2011.