A state air monitor in Seattle has detected trace levels of radiation from Japan's stricken nuclear plant, the state Department of Health reported Monday.
The amounts of radioactive iodine are millions of times lower than levels that would be a health concern and were not enough to raise the state’s overall background radiation levels, officials said.
The findings are consistent with those reported by federal and Canadian agencies, and by independent researchers.
Because of the distance from Japan and air mixing, radiation reaching Washington state is too diluted to be a risk, officials said, adding that protective action was unnecessary.
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The Health Department has advised against Washington residents taking potassium iodide because of the radiation release.