Ok, I looked into the water report from Champaign water (Ameren) and I found that they do some sort of lime softening:homeburrero wrote:It's true that natural unsoftened water will almost always have higher total hardness than total alkalinity. In your case I was thinking possibly a typo or error in the lab numbers, but your Ca and Mg numbers in that last post do agree perfectly with your total hardness number.
So I did a little searching about water utilities in Illinois that might do ion exchange softening at the plant (something that's very rarely done) and noticed that Dekalb IL, for example, does use cation exchange softening. So that may be the explanation in your case.
Your water is relatively low in calcium hardness ( 14.3 mg/L Ca++ ion is equivalent to 36 mg/L calcium hardness as CaCO3) which will help reduce the limescale risk, but still with that high alkalinity it likely is a little scale prone.
So I'm guessing this is why the hardness is a bit lower. They also report similar hardness:
Thanks. I'm a bit on the fence with this. I'm not finding many others with alkalinity that's greater. But I definitely saw scale build up on my old machine:homeburrero wrote: That might be an option, although given your low hardness and high alkalinity it may not do as much carbonate hardness reduction as it would with typical water. (BTW, your carbonate hardness here, properly defined, is roughly equal to your total hardness and not your alkalinity as with typical waters -- about 100 mg/L CaCO3 equivalent or 5-6 German degrees. If you go with a WAC softener you might be best to use that to set your bypass.)
Breville Dual Boiler, five+ years on
So something needs to be done.