If anyone is still reading this thread, I found the water analysis for the area where the Radeberger Karswald well is located,
http://www.wvbiw.de/online/wvbiw/cisweb4_wvbiw.nsf/%28File%29/4F4199CCCE58FDDFC1257C010030CF85/$File/Vollanalyse%20VG%20Roederaue.pdf
5th column (WW Karswald)...