I brewed this weekend, testing my water first for Alkalinity. The results came as a bit of a surprise, with my bicarbonate value (145) rather higher than the values provided by the water company. Seems that my assumption that the variation was minimal, based on the minimal change in value provided by the water company is down to averaging out, rather than a lack of variation.
I plugged the value into Bru'n Water, and used it to build my water profile anyway, but did notice that it stated that my water report was no unbalanced. Should I be worrying about this?