A mountain trout caught in the Niida River in Fukushima Prefecture contained 11,400 becquerels of radioactive cesium per kilogram, more than 110 times above the government limit for food products, a survey by the Environment Ministry showed.
Presenting its findings Friday on cesium in fish and insects in rivers, lakes and sea in Fukushima, the ministry said it also detected 4,400 becquerels of radioactive cesium in a smallmouth bass and 3,000 becquerels in a catfish caught at the Mano Dam in Iitate.
The maximum threshold for food items is 100 becquerels per kilogram.
It is only the second time the ministry has conducted such a survey, after undertaking a study between December and this February. The first data were published in July.
“Like the previous survey, concentrations (of cesium) tended to be higher in rivers and lakes than in the sea. We want to grasp the extent of pollution by continuously conducting the survey,” a ministry official said.
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