A U.S. government source monitoring radiation in Southern California reports that the plume expected from Japan has reached the state but that first readings are a billion times less than what would be health threatening NBC News reports.
The source, who asked not to be identified, is a diplomat with access to the UN tracking data but does not work directly with it, Tracie Potts with NBC News reported Friday morning.
The Associated Press quoted a similar source saying the diplomat had access to the U.N. radiation tracking data and readings from a California-based measuring station but didn't reveal the location of the station.
That assessment is in line with those of International Atomic Energy Agency officials and independent experts. They've said radiation levels would dissipate so much by the time the fallout reached the U.S. coastline that there would be no health risk whatsoever to residents.