I'm not sure, I don't know anyone who has ever had their water tested. Don't know anyone who has gotten sick from it either. :)
Oh no wait--I know one person who had their well water tested after they found a dead squirrel in it (a dead squirrel that actually made their water taste better, surprisingly!). That was free, I believe. :P
Doubtful. I inherited a disease from my father, not from the water. :lol: Plus when I'm in hospitals I drink their treated water and compared to drinking the spring water, there's no difference to my health. :)