122Ā mg/l Calcium
āTotalā Hardness 305 mg/l
21.35 Degrees Clark
30.5Ā Degrees French
17.08 Degrees German
3.05Ā mmol/l Millimoles
0.15 mg/l Fluoride
According to water company, based on that ātotalā figure, this is āvery hardā according to the ārecognised classification schemeā they used. Figures above are current.
Either way, I quoted the figures at the time (similar to those but maybe not identical) and Mark didnāt seem ā¦ comfortable. IIRC, he felt some pre-processing would be preferable. Softening, IIRC. But I donāt remember exactly how he phrased it. It just felt like he thought it wasnāt necessarily a good idea, and would drive filter costs (if I remember right) up quite high.