An air monitor in Hawaii has picked up trace amounts of radiation from the damaged Japanese nuclear plant — but at levels deemed safe, U.S. Environmental Protection Agency officials said Tuesday.

The monitor, located in Honolulu, picked up “minuscule levels of an isotope … consistent with the Japanese nuclear incident” on Monday night, an EPA press release stated. “This isotope was detected at our fixed monitor in Hawaii, and it is far below any level of concern for human health.”

Hawaii Department of Health officials confirmed the EPA’s finding and noted that current data from Hawaii RadNet monitors still indicate no risk of harmful radiation exposure. We’ve written a guide on how to access near real-time data from the monitors.

Meantime, four air monitors in California and Washington also picked up trace amounts of radiation on Friday, including radioactive iodine, cesium, and tellurium.

“These levels are consistent with the levels found by a Department of Energy monitor last week and are to be expected in the coming days,” the EPA release states, noting that the radiation levels detected are millions of times below levels of concern.

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