I can't recall the source of the radiation analysis charts that I had seen, but during 2011 within weeks of Fukushima blowing, Cesium 137 was being detected in the Bay Area, at least.

Since then, the radiation must have circumvented the globe so many times that it is everywhere.

It is a problem so profound that every able bodied nation should be attempting to assist Japan in lessening the damage done.

May of last year, the media outlets reported radiated tuna had made it to CA, also.