毎日の降下物(塵や雨)中の放射性物質検査結果
Levels of radioactive materials in the fallout obtained everyday

The sampling and measurement are conducted at the Tokyo Metropolitan Institute of Public Health (Hyakunin-cho, Shinjuku-ku, Tokyo)

Sampling date 131I
Bq/m2
Radioactive Cesium
134Cs
Bq/m2
137Cs
Bq/m2
15:00, 21 Aug., 2017 - 15:00, 22 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 20 Aug., 2017 - 15:00, 21 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 19 Aug., 2017 - 15:00, 20 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 18 Aug., 2017 - 15:00, 19 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 17 Aug., 2017 - 15:00, 18 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 16 Aug., 2017 - 15:00, 17 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 15 Aug., 2017 - 15:00, 16 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 14 Aug., 2017 - 15:00, 15 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 13 Aug., 2017 - 15:00, 14 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 12 Aug., 2017 - 15:00, 13 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 11 Aug., 2017 - 15:00, 12 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 10 Aug., 2017 - 15:00, 11 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 09 Aug., 2017 - 15:00, 10 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 08 Aug., 2017 - 15:00, 09 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 07 Aug., 2017 - 15:00, 08 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 06 Aug., 2017 - 15:00, 07 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 05 Aug., 2017 - 15:00, 06 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 04 Aug., 2017 - 15:00, 05 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 03 Aug., 2017 - 15:00, 04 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 02 Aug., 2017 - 15:00, 03 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 01 Aug., 2017 - 15:00, 02 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 31 Jul., 2017 - 15:00, 01 Aug., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 30 Jul., 2017 - 15:00, 31 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 29 Jul., 2017 - 15:00, 30 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 28 Jul., 2017 - 15:00, 29 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 27 Jul., 2017 - 15:00, 28 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 26 Jul., 2017 - 15:00, 27 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 25 Jul., 2017 - 15:00, 26 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 24 Jul., 2017 - 15:00, 25 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 23 Jul., 2017 - 15:00, 24 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 22 Jul., 2017 - 15:00, 23 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 21 Jul., 2017 - 15:00, 22 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 20 Jul., 2017 - 15:00, 21 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 19 Jul., 2017 - 15:00, 20 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 18 Jul., 2017 - 15:00, 19 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 17 Jul., 2017 - 15:00, 18 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 16 Jul., 2017 - 15:00, 17 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 15 Jul., 2017 - 15:00, 16 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 14 Jul., 2017 - 15:00, 15 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 13 Jul., 2017 - 15:00, 14 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 12 Jul., 2017 - 15:00, 13 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 11 Jul., 2017 - 15:00, 12 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 10 Jul., 2017 - 15:00, 11 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 09 Jul., 2017 - 15:00, 10 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 08 Jul., 2017 - 15:00, 09 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 07 Jul., 2017 - 15:00, 08 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 06 Jul., 2017 - 15:00, 07 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 05 Jul., 2017 - 15:00, 06 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 04 Jul., 2017 - 15:00, 05 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 03 Jul., 2017 - 15:00, 04 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 02 Jul., 2017 - 15:00, 03 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 01 Jul., 2017 - 15:00, 02 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 30 Jun., 2017 - 15:00, 01 Jul., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 29 Jun., 2017 - 15:00, 30 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 28 Jun., 2017 - 15:00, 29 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 27 Jun., 2017 - 15:00, 28 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 26 Jun., 2017 - 15:00, 27 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 25 Jun., 2017 - 15:00, 26 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 24 Jun., 2017 - 15:00, 25 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 23 Jun., 2017 - 15:00, 24 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 22 Jun., 2017 - 15:00, 23 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 21 Jun., 2017 - 15:00, 22 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 20 Jun., 2017 - 15:00, 21 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 19 Jun., 2017 - 15:00, 20 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 18 Jun., 2017 - 15:00, 19 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 17 Jun., 2017 - 15:00, 18 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 16 Jun., 2017 - 15:00, 17 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 15 Jun., 2017 - 15:00, 16 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 14 Jun., 2017 - 15:00, 15 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 13 Jun., 2017 - 15:00, 14 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 12 Jun., 2017 - 15:00, 13 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 11 Jun., 2017 - 15:00, 12 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 10 Jun., 2017 - 15:00, 11 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 09 Jun., 2017 - 15:00, 10 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 08 Jun., 2017 - 15:00, 09 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 07 Jun., 2017 - 15:00, 08 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 06 Jun., 2017 - 15:00, 07 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 05 Jun., 2017 - 15:00, 06 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 04 Jun., 2017 - 15:00, 05 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 03 Jun., 2017 - 15:00, 04 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 02 Jun., 2017 - 15:00, 03 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 01 Jun., 2017 - 15:00, 02 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 31 May., 2017 - 15:00, 01 Jun., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 30 May., 2017 - 15:00, 31 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 29 May., 2017 - 15:00, 30 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 28 May., 2017 - 15:00, 29 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 27 May., 2017 - 15:00, 28 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 26 May., 2017 - 15:00, 27 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 25 May., 2017 - 15:00, 26 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 24 May., 2017 - 15:00, 25 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 23 May., 2017 - 15:00, 24 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 22 May., 2017 - 15:00, 23 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 21 May., 2017 - 15:00, 22 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 20 May., 2017 - 15:00, 21 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 19 May., 2017 - 15:00, 20 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 18 May., 2017 - 15:00, 19 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 17 May., 2017 - 15:00, 18 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 16 May., 2017 - 15:00, 17 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 15 May., 2017 - 15:00, 16 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 14 May., 2017 - 15:00, 15 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 13 May., 2017 - 15:00, 14 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 12 May., 2017 - 15:00, 13 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 11 May., 2017 - 15:00, 12 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 10 May., 2017 - 15:00, 11 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 09 May., 2017 - 15:00, 10 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 08 May., 2017 - 15:00, 09 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 07 May., 2017 - 15:00, 08 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 06 May., 2017 - 15:00, 07 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 05 May., 2017 - 15:00, 06 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 04 May., 2017 - 15:00, 05 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 03 May., 2017 - 15:00, 04 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 02 May., 2017 - 15:00, 03 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 01 May., 2017 - 15:00, 02 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 30 Apr., 2017 - 15:00, 01 May., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 29 Apr., 2017 - 15:00, 30 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 28 Apr., 2017 - 15:00, 29 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 27 Apr., 2017 - 15:00, 28 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 26 Apr., 2017 - 15:00, 27 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 25 Apr., 2017 - 15:00, 26 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 24 Apr., 2017 - 15:00, 25 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 23 Apr., 2017 - 15:00, 24 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 22 Apr., 2017 - 15:00, 23 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 21 Apr., 2017 - 15:00, 22 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 20 Apr., 2017 - 15:00, 21 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 19 Apr., 2017 - 15:00, 20 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 18 Apr., 2017 - 15:00, 19 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 17 Apr., 2017 - 15:00, 18 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 16 Apr., 2017 - 15:00, 17 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 15 Apr., 2017 - 15:00, 16 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 14 Apr., 2017 - 15:00, 15 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 13 Apr., 2017 - 15:00, 14 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 12 Apr., 2017 - 15:00, 13 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 11 Apr., 2017 - 15:00, 12 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 10 Apr., 2017 - 15:00, 11 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 09 Apr., 2017 - 15:00, 10 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 08 Apr., 2017 - 15:00, 09 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 07 Apr., 2017 - 15:00, 08 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 06 Apr., 2017 - 15:00, 07 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 05 Apr., 2017 - 15:00, 06 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 04 Apr., 2017 - 15:00, 05 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 03 Apr., 2017 - 15:00, 04 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 02 Apr., 2017 - 15:00, 03 Apr., 2017 ND(not detectable) ND(not detectable) ND(not detectable)
15:00, 01 Apr., 2017 - 15:00, 02 Apr., 2017 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