Tiny amounts of radiation emitted by a stricken nuclear plant in Japan have been detected in Arizona.
The Arizona Radiation Regulatory Agency says monitors west of Phoenix and in the city have detected Iodine-131 emitted from the Fukushima Dai-ichi plant north of Tokyo. But the amounts are so small that they are only a fraction of normal background radiation people are exposed to each year.
Agency director Aubrey Godwin said Tuesday that most people receive from 100 to 300 millirems per year. The extra radiation detected is about 0.1 (zero-point-one) millirem.
Godwin says there is no health risk from the additional radiation and health officials say no precautions are needed.
The plant was heavily damaged by the March 11 earthquake and tsunami and engineers are still trying to repair it.