The Environmental Protection Agency says air monitors in Boise have detected low levels of radioactive material from Japan's Fukushima nuclear plant, but the levels are far below public health concern.  The agency in a statement released Saturday says it found elevated levels of the radioactive isotopes iodine-131, cesium-137 and cesium-134.      Agency EPA scientists routinely test precipitation samples from more than 30 sites in the U.S.   The Idaho Statesman reports that scientists found Boise had the highest levels of any city in the report, but weren't sure why.  The agency did not say when the samples were taken, but that it can take up to five days for results because of the number of samples being analyzed.

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