Radioactive Material Monitoring in and around Fukushima Prefecture
(Public Water Areas)

Radioactive material monitoring was conducted at rivers, lakes and coastal areas in locations centered on Fukushima Prefecture, such as Miyagi and Ibaraki Prefectures, where contamination with radioactive materials was suspected.

In FY2016, monitoring covered 602 locations and analysis was conducted for radioactive cesium and strontium in water, etc.

[Monitoring results of radioactive cesium concentrations in water]

River water samples (2,004 samples): Radioactive cesium was not detected in any samples except for three collected at three locations in Fukushima Prefecture.

Lake water samples (1,352 samples): Radioactive cesium was not detected in any samples except for 34 collected at 13 locations in the Hamadori District, Fukushima Prefecture.

Water samples collected in coastal areas (534 samples): Radioactive cesium was not detected in any samples.

• Included in this reference material on March 31, 2013
• Updated on February 28, 2018