Yes, here it is (drum roll, please), the long awaited update to my brewing-water calculator: MpH Water Calculator v3.0.
The most significant changes are found on the Water Tab. You can now enter ions for two water sources that you might mix for either mash or sparge water. Typically one source is a municipal water supply while the other is RO or distilled, but the two sources can be from any two different water supplies. In addition, the entries for the ions reflect the order that ions are reported in a typical water report from Ward Labs.
I've also added BJCP 2015 style data, just for convenience.
The underlying model used to estimate mash pH is the same as previous versions of the calculator. I'm currently working on a more fundamental (i.e., less phenomenological) model for the calculations. With any luck this model will be implemented later this year.
As always, if you have any questions, use the comment section of this blog. Cheers!