[markem]

I called a friend who is on a well system. His advice was to call your county and find out who is knowledgeable about what water quality issues are in your area and what techniques are being used. Check around and find any farm supply stores or granges in your area. Don't ask so much about systems, but find out who really knows about the issues with the water and is the one everyone asks filtration questions to. A bit of work, but probably only a few phone calls and maybe a couple of hours talking to people in person on a Saturday.