Now Idaho Falls has been showing recent slightly elevated levels, but for some reason radiation from Japan seemed to be concentrated in Boise Idaho back when they montiored it during March. No idea of the source for these current spikes.
And Phoenix has been having some very strange spikes. Source unknown and even it it was from Japan, Obama has muzzled our media, so you wont here it reported.
At any rate, there have been recent readings of Iodine-131 in various locations of Japan since September. Personally know someone who is visiting with family near Tokyo right now. Most of the Japanese realize their government has been lying from day 1 and they do not trust them one bit. A lot of Japanese are doing their own monitoring.