As of 28 March 2011, the Idaho Department of Environmental Quality is not reporting any increase in radiation levels in Idaho, on their RadNet site.
Also, the Idaho Department of Health and Welfare believes that currently the risk of high radiation levels, from Japan, is still low.
The IDHW has a Japan situation page that lets Idahoans know about monitoring, food safety and FAQs like; “Should I start taking Iodide?”
(don’t take iodide unless you’re real close to a nuclear disaster ’cause to much iodide is bad for you)