Levels of radioactive materials in the fallout obtained everyday, 2025 Fiscal year
The sampling and measurement are conducted at the Tokyo Metropolitan Institute of Public Health (Hyakunin-cho, Shinjuku-ku, Tokyo)
| Sampling date | 131I Bq/kg |
Radioactive Cesium | |
|---|---|---|---|
| 134Cs Bq/kg |
137Cs Bq/kg |
||
| 9:30, Sun., 18 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sat., 17 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Fri., 16 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Thu., 15 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Wed., 14 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Tue., 13 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Mon., 12 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sun., 11 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sat., 10 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Fri., 09 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Thu., 08 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Wed., 07 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Tue., 06 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Mon., 05 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sun., 04 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sat., 03 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Fri., 02 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Thu., 01 May. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Wed., 30 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Tue., 29 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Mon., 28 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sun., 27 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sat., 26 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Fri., 25 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Thu., 24 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Wed., 23 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Tue., 22 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Mon., 21 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sun., 20 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sat., 19 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Fri., 18 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Thu., 17 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Wed., 16 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Tue., 15 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Mon., 14 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sun., 13 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sat., 12 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Fri., 11 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Thu., 10 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Wed., 09 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Tue., 08 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Mon., 07 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sun., 06 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Sat., 05 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Fri., 04 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Thu., 03 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Wed., 02 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
| 9:30, Tue., 01 Apr. - 9:30 the following day | ND(not detectable) | ND(not detectable) | ND(not detectable) |
- Samples are collected and analyzed everyday using a germanium semiconductor detector.
- It is known that rainfall may increase values.
- The number of significant digits of values is set as 2 in order to be consistent with that of the Japanese government.
- Please see here about the principle behind “ND (Not Detectable)”.
- A unit of values is Bq/m2, identical to MBq/km2.
Please see the pages for each year for data from previous surveys
- Levels of radioactive materials in the fallout obtained everyday , 2020 Fiscal year
- Levels of radioactive materials in the fallout obtained everyday , 2019 Fiscal year
- Levels of radioactive materials in the fallout obtained everyday , 2018 Fiscal year
- Levels of radioactive materials in the fallout obtained everyday , 2017 Fiscal year
- Levels of radioactive materials in the fallout obtained everyday , 2016 Fiscal year
- Levels of radioactive materials in the fallout obtained everyday , 2015 Fiscal year
- Levels of radioactive materials in the fallout obtained everyday , 2014 Fiscal year
- Levels of radioactive materials in the fallout obtained everyday , 2013 Fiscal year
- Levels of radioactive materials in the fallout obtained everyday , 2012 Fiscal year
- Levels of radioactive materials in in the fallout obtained everyday , 2011 Fiscal year and 2010 Fiscal year