Samhain said it.

The best you could probably do is find a reasonably clean piece of land (pasture - check the history of use), have the water thoroughly tested (around $200, I think), start improving the soil by growing mixed cover crops and applying needed minerals (after a good soil test), and then start growing your own food.

No one is going to point out a great, safe piece of land to you. Why should they? No one is going to test various places to see what is wrong with it for you. Why would they? No independent company would do it, and why should the taxpayers pay for it?

This kind of research is strictly up to you.

Sue