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| Results of Monitoring of Radioactive Materials in Seawater Sampled off Hokkaido | |||||||
| For inquiries, please contact: | |||||||
| Marine Product Management Division, Bureau of Marine Products, | |||||||
| Department of Fisheries and Forestry, Hokkaido Government | |||||||
| Postal address: Kita 3-jo Nishi 6-chome, Chuo-ku, Sapporo 060-8588 Hokkaido | |||||||
| Tel: 011-204-5464 (Direct number) | |||||||
| (Units:Bq/kg) | |||||||
| Sampling date | Sampling place | layer | Measurements | Notes | |||
| Radioactive iodine | Radioactive cesium | Radioactive cesium | |||||
| （I－１３１） | （Cs－１３４) | （Cs－１３７) | |||||
| 2019-06-11 | New | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | |
| 2019-06-11 | New | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | |
| 2019-06-11 | New | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | |
| 2019-05-14 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-05-14 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-05-14 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-04-09 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-04-09 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-04-09 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-03-05 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-03-05 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-03-05 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-02-12 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-02-12 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-02-12 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-01-15 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-01-15 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2019-01-15 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-12-11 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-12-11 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-12-11 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-11-13 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-11-13 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-11-13 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-10-16 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-10-16 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-10-16 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-09-11 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-09-11 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-09-11 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-08-14 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-08-14 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-08-14 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-07-10 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-07-10 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-07-10 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-06-12 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-06-12 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-06-12 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-05-15 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-05-15 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-05-15 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-04-10 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-04-10 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-04-10 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-03-08 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-03-06 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-03-06 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-02-13 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-02-13 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-02-13 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-01-16 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-01-16 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2018-01-16 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-12-12 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-12-12 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-12-12 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-11-14 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-11-14 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-11-14 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-10-10 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-10-10 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-10-10 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-09-12 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-09-12 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-09-12 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-08-15 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-08-15 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-08-15 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-07-11 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-07-11 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-07-11 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-06-13 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-06-13 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-06-13 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-05-16 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-05-09 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-05-09 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-04-11 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-04-11 | Asahi Fishing Port in Samani | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-04-11 | Tokotan Fishing Port in Akkeshi | Surface layer | Not detectable | Not detectable | Not detectable | ||
| 2017-03-07 | Itanki Fishing Port in Muroran | Surface layer | Not detectable | Not detectable | Not detectable |