In the past two days I have run across two referrences for Breweries in the Munich area using deep bored wells to source their water. The water is said to be soft, but no detailed information. Martin may have more information, or might have interest.
The first was on a site about the Ayinger tour (someday we will do that one). Scroll down a little, and there is a picture of a display depicting the geology, and a water fountain built out of a rock, and a little text.http://allaboutbeer.com/paulaner-water/
The other was this one from Paulaner. It states that the deep water is similar to the water in Pilsen. It also points out that Germany has banned fracking - which made me smile, as Germany has essentially zero petroleum resources. http://allaboutbeer.com/paulaner-water/
For my own brewing, I have been diluting 1 gallon of my water with 9 gallons of RO for Dunkels. I might as well just use RO and add some minerals.