Fukushima Fallout: Radioactive Material in Sludge at 16 Prefectures

NHK has learned that 16 prefectures in Japan have detected radioactive material in sludge since the crisis began at the Fukushima Daiichi nuclear plant in March.

NHK has found through interviews that at least 22 of Japan's 47 prefectures have been testing sludge for radioactive material. 16 of them, ranging from Hokkaido to Osaka, have actually detected radioactive substances. The level of radioactive cesium was highest in Fukushima city, at 447,000 becquerels per kilogram. This was followed by Tokyo at 55,000 becquerels and Maebashi, north of Tokyo, at 42,800 becquerels.