Water Supply: SouthEast Leicester ZLC27 from Ragdale Reservoir. 100% from Melbourne Treatment Plant NW of Loughborough.
From a phone call to Severn & Trent July 2015:
Total Hardness as CaCO3 (mg/L) 248.16
I've just determined alkalinity, Ca2+ and Mg2+ myself by titration.
Alkalinity - titrated with 0.122 M HCl using mixed indicator (Bromocresol Green and Methyl Red, I think this is what Salifert use).
Determined total of Ca2+ and Mg2+ by titration with 0.01M EDTA at pH 10.5 (pH10.5 buffer NH4Cl/NH4OH) using Eriochrome Black T indicator)
Determined total of Ca2+ by titration with 0.01M EDTA at pH 12.0 to precipitate Mg(OH)2 (pH12 by addition of 8M NaOH) using Patton-Reeder (Cal-Red) indicator.
Alkalinity as CaCO3 148
Total Hardness as CaCO3 252
So, the Severn and Trent numbers are pretty up to date as they are essentially the same as mine.
I think it's time I started treating my water in addition to my usual campden tablet.
Having seen these numbers, it is no surprise that my best brews so far have been stouts and porters and whilst I've thoroughly enjoyed the APAs I have brewed, they're not quite there.
Time to reduce my alkalinity and add a bit of gypsum.
The troubles of our proud and angry dust
Are from eternity, and shall not fail.
Bear them we can, and if we can we must.
Shoulder the sky, my lad, and drink your ale.
A. E. Housman
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