Just an idea. If you've gotten a mineral analysis report, please post the results as well as the location and date the sample was taken. This could be useful for other people in your area, so that not everyone will have to spend the $20 to get an analysis done. I think a lot of us live in an area where the water isn't served up by a municipality, or that municipality just doesn't do a good job of making available this information.
Me, I'm in Santa Clara CA, and will be sending a bottle off to get analyzed unless someone else has done it, as getting the water department to give me a detailed mineral analysis is proving a futile effort. Apparently people are more concerned with fecal coliform bacteria and arsenic than calcium, sodium or magnesium.