Data Notes：
1. Taiwan’s marine radiological survey program follows international monitoring practices, with cesium-137 (Cs-137) designated as the primary radionuclide for monitoring.
2. In response to the Japanese government’s policy of discharging tritium-containing wastewater from the Fukushima Daiichi Nuclear Power Plant into the ocean, the Nuclear Safety Commission has strengthened efforts since October 2019 to establish and monitor baseline levels of tritium in Taiwan’s coastal seawater.
3. In the dataset, blank entries indicate "Not Detected" or "Not Applicable."
4. In the dataset, a "-" indicates that the measured value was below the Minimum Detectable Activity (MDA). The MDA varies depending on factors such as the type of radionuclide analyzed, sample mass, detection method, instrumentation, and measurement duration.
5. Reference Minimum Detectable Activity (MDA) Values for Each Analyzed Radionuclide: Seawater Cs-137: approximately 0.5 mBq/L, Seawater Tritium (H-3): approximately 2 Bq/L, Sediments (beach sand, river sand, marine mud) Cs-137: approximately 0.06 Bq/kg (dry weight), Marine Organisms Cs-137: approximately 0.05 Bq/kg (wet weight).
6. Locations assigned with a site code represent fixed long-term monitoring stations. Locations without a site code indicate mobile sampling sites or temporary, non-continuous sampling activities.
7. According to the "Environmental Radiation Monitoring Standards," the investigation reference levels for various sample types are as follows: Seawater Cs-137: 2,000 mBq/L； Seawater Tritium (H-3): 1,100 Bq/L；Marine Organisms Cs-137: 74 Bq/kg (wet weight)； Sediments (river sand, marine mud) Cs-137: 740 Bq/kg (dry weight)； Sediments (beach sand) Cs-137: 20 Bq/kg (dry weight).
8. If you have any questions regarding the marine radiological survey data, please contact the Radiation Monitoring Center of the Nuclear Safety Commission.
(1) Contact Phone: Li Mingda, Technical Officer (07)3709206#204, Cai Wenxian, Section Chief (07)3709206#200
(2) E-mail：mtlee@aec.gov.tw。
(3) For the latest updates and marine radiological geographic information, please visit the "Ocean Radioactive Dispersion Information Platform" managed by the Nuclear Safety Commission.