[Homeroast] distilled water

Josh Housh joshhoush at gmail.com
Wed May 16 15:44:22 CDT 2012

Distilled water should not be used when brewing coffee, the lack of
minerals will mean there is nothing for the flavorful elements to bond to
during brewing leaving lots of good stuff behind in the basket.  In fact,
our fancy Giotto espresso machines have a sensor that detects when the
removable tank gets low and this sensor won't even function properly if
distilled water is used since the electrons from the minerals carry the
current through the water.  It is a well established fact that distilled
water does not yield good results.  That said water varies greatly and so
will brewed results.  Some people are even selling little packets to treat
water to ensure it has the "optimum" mineral content.  If you want to use
purified water from the store use Spring water for best results.

On Wed, May 16, 2012 at 1:31 PM, j3r <j at j3r.org> wrote:

> On 12-05-16 04:13 PM, sci wrote:
>> Do some cupping tests with distilled, tap, spring and filtered water. I
>> think you'll find the spring and filtered give the best results for coffee
>> and tea. The reason is because they have good mineral content that makes
>> water taste good. Tap of course usually has chlorine. Distilled, lacking
>> vital minerals, is flat and dull tasting.
>> Ivan
> I suppose it all comes down to taste. I don't want water to taste like
> anything but water personally (ie have no taste). The trace minerals found
> can change the taste, but they are not adding anything to my health, nor my
> taste. If I want my water to taste different I will drink a beer or a fruit
> juice :)
> I will do a blind cupping, it is certainly important to get the best
> liquid medium for your personal taste. I do find it strange that SCAA
> cupping relies on water that is not truly neutral tasting - this seems that
> it could introduce a variation in taste from geographic region to region.
> The tap water here tastes very different from water a hundred kilometers
> away, even after charcoal filtering.
> Even if it does seem to produce less "tasty" coffee for some (I suppose
> due to the fact that many find distilled water to be "flat tasting"), it
> should still give a truer idea of the taste of the coffee instead of the
> water. In my understanding we are not trying to evaluate the water being
> used, it is simply a delivery vector for the oils and particulates in the
> coffee.
> I use glass for my brewing so I don't see a problem with it picking up
> metallic tastes and so forth.
> Thanks for the ideas and thoughts all!
> Jeremy
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