There are errors in the concentrations reported above. The cations and anions don't balance nearly well enough. For the reported alkalinity, the bicarbonate content would be around 85 ppm. The Mg content of 60 ppm is a little suspect since it frequently exists at concentrations that are lower than the Ca content. 60 ppm Mg is on up there, but it shouldn't be at the diuretic level. Are you sure that it was 60 ppm and not 60 ppb? If the profile was with 60 ppb Mg, then it comes much closer to balancing the cations and anions.