From the report linked by ceebs downthread, on the No. 1 reactor, results of the analysis run by TEPCO:

...almost all the
noble gases were vented out into the environment. The ratio of released radioactive iodine to the total iodine contained (hereinafter referred to as release ratio) was IV-44 approximately 1% from the analysis result, and the release of other nuclides was less than 1%.

Results of the re-run by NISA (which found that the pressure vessel was damaged 5 hours rather than 17 hours after the accident, though the timeline of the fuel rod meltdown was the same):

As for release ratio of radioactive nuclides, the analytical results show about 1% of tellurium, about 0.7% of iodine and about 0.3% of cesium.

So further away from Fukushima, I wouldn't worry about the heavy metals, but would worry about the lots of Iodine (even ater decay) and caesium still there.

_{*Lunatic*, n.
One whose delusions are out of fashion.}