Radiation levels around Fukushima for March 16th have been put into handy graph format. They are the official figures by MEXT, measure in MICRO sieverts. The highest value at the edge of the 30km zone is 150uSv/h. That’s a high amount for people living on the 30km border (remember it accumulates every hour). There are also some 0.04 and 0.05mSv.h values around the 30km border (about the value of a chest x-ray), but the rest are much lower. Still, considering these values were taken at the 30km border, I wouldn’t want to be someone living just outside the evacuation radius. It’s been several days now that the plant has been spewing out radiation and it all gradually builds up.

http://www.mext.go.jp/component/a_me...1303727_12.pdf