Well, let's try and imagine a World with just one measure of radioactive levels and start from there.
Possible to an extent, but will end up betraying the real facts, the real human cost, when simplified to such an extent. But I will spend some time trying to come up with something for you in the coming week, although I really dont feel like there is enough data yet and I've no way to judge how much more stuff will be emitted from the plant in future.
As for factual data, I've already said a lot but I will try to give a summary here, starting with the human cost.
In terms of deaths it will take a very long time for the numbers to exceed the number killed by the tsunami, and if governments took as much care as they should, it will never be easy to say that such numbers have died as a result of Fukushima. People will be arguing about this in 20 or more years so I cant say more right now. Workers at the plant are at more immediate risk. People who have refused to evacuate are at risk. People in some locations to the north west of the plant are at risk. Other people in a variety of locations are at risk too, but as its a medium-long term risk and may show up in a variety of ways, with individual deaths not being attributed to Fukushima, only overall statistical trends. A variety of animals are at risk of dying from neglect in the evacuation zone. Large numbers of people face the pain of losing their hometowns forever, of never being able to move back. Large numbers of farmers and fishers may face a variety of burdens for many many years to come. Further afield, including globally, we face yet another addition to the sources of radiation that will cause some of us to get cancer, but in the grand scheme of human death it will probably not make a very noticeable difference. Perhaps there are one or two additional horrors that could yet unfold, Im not a fan of complacency, but its just impossible to say anything on this front without indulging in meaningless speculation.
On the technical side, the nuclear industry in Japan and generally has been exposed yet again. It should be a wakeup call. Lessons will no doubt be learnt, and we'll never know what future disasters we've avoided as a result, but at some point there will be a new nuclear reactor problem which will demonstrate yet again how high the stakes are with nuclear safety. Humans remain trapped in a 'little bit of knowledge can be dangerous' phase, and all things nuclear fall squarely into this category in my book.
Many things have made me very angry since this nuclear power plant went to fuck, I've always tried to pay attention to nuclear issues and will be paying even greater attention to the pro-nuclear people in future now that I've seen how they operate at a time like this. Not that many of the anti-nuclear people are immune from departing from facts in order to further a propaganda agenda either.