"Lakes across eastern Japan are being contaminated with radioactive cesium from the crippled Fukushima No. 1 nuclear power plant, and scientists are warning of a growing problem in Tokyo Bay.
Radioactive mud carried down rivers is slowly accumulating in the lakes, in some cases making fish and shellfish dangerous to eat.
In March, a maximum cesium concentration of 9,550 becquerels per kilogram was detected in mud on the bottom of the Bizengawa river, 1.65 kilometers from where it flows into Japan’s second-largest lake, Lake Kasumigaura in Ibaraki Prefecture.
A month later, the highest reading was 800 meters closer to the lake and had increased to 9,980 becquerels per kilogram."
Takashi Sugimoto reports for Asahi Shimbun July 5, 2012.
SEE ALSO:
"New Regulatory Commission To Exclude Those With Close Ties To Nuclear Industry" (Asahi Shimbun)
"Radioactive River Mud Threatens Lakes, Tokyo Bay"
Source: Asahi Shimbun, 07/06/2012