Fig. 1 Database for Radioactive Substance Monitoring Data (1)

The Database for Radioactive Substance Monitoring Data is an open database site compiling the concentration of radioactive cesium in environmental samples in Fukushima Prefecture and the surrounding areas, that in food, and air dose rates monitored by the Japanese government, municipalities, Tokyo Electric Power Company, and research institutions.

The tritium concentration in seawater near the NPS is periodically measured by the Japanese government, Fukushima Prefecture, and Tokyo Electric Power Company. On the top page of the site (https://emdb.jaea.go.jp/emdb/), when you click “SEA WATER,” set [Term] in the search condition, select H-3 (tritium) from the pull-down menu of [Nuclide], check [Middle classification] and [Measurement Items], and click "≪ Render Map".

Fig. 2 Database for Radioactive Substance Monitoring Data (2)

If you want to check detailed measurement values and temporal changes, select the point you want to examine and click the graph mark on the left side to display the graph and check the measured values.

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Fig. 3 Database for Radioactive Substance Monitoring Data (3)

Tritium concentrations in river water are monitored by Fukushima Prefecture. You can check the concentrations by clicking “RIVER WATER” on the top page and following the same procedure.

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