Radioactive Material Monitoring in the Water Environment (Coastal Area Sediments)
Radioactive cesium concentrations in sediments in coastal areas were measured in FY2021 as in the previous year.
A total of 267 sediment samples collected in coastal areas, including 150 samples collected in Fukushima Prefecture and others collected in Iwate, Miyagi, Ibaraki, Chiba Prefectures and the Tokyo Metropolis, were surveyed.
The survey results showed that concentrations of radioactive cesium detected in all of these samples were less than 1,000 Bq/kg (dry).
- Included in this reference material on March 31, 2013
- Updated on March 31, 2023