Thursday, 1 January 2009

The best water for your espresso machine

We have been researching the impact of different bottled waters on (i) the taste of coffee, and (ii) its impact on espresso machines.

We discovered that like many things in life it is a trade-off between the two objectives, i.e. the kind of water you need for great coffee is at odds with the kind you need to ensure no limescale forms in your espresso machine.

Using a water with the lowest 'dry residue' value (expressed in mg/L) you can find will indeed ensure you never see scale in your machine, but unfortunately it will also make your coffee taste overly 'bright' and 'harsh'.

It is complicated by the fact that the bottled waters on the market tend to fall into one of two extremes; mineral waters with very high TDS values, and typically very hard, and the 'arctic' waters with very low TDS values, very low alkalinity and typically a pH of less than 7 (i.e. acidic).

The key parameters and their target values are:

pH = 7.0

Total dissolved solids(TDS), often stated as 'dry residue@180C' = 120-130 mg/L

Hardness = 70-80 mg/L

Alkalinity = 50mg/L

You will soon find yourself saying; "great, most helpful, but I can not find all of these values on the side of the bottle".

This will always be the case for the 'Hardness' and 'Alkalinity' values as they need to be derived and we will show you how to do that below, can frequently be the case for 'pH', and is sometimes the case for the 'dry residue' value. If necessary visit the manufacturer's website, or drop them an email asking for the data.

The next step is to understand why these values are important to coffee preparation

pH
A value from 1 (strong acid) to 14 (strong alkali), with a value of 7 being 'neutral'. It is not a linear scale, but a logarithmic one, like the Richter scale for seismic activity, so even small movements away from the neutral value of 7 quickly become quite acidic or alkali.

Alkaline water can result in dull, chalky, flat coffee. Acidic water creates bright, imbalanced coffee. You want to use water that is 'neutral' for the preparation of coffee.

TDS
As the name implies it measures the solids dissolved in the water. If too many solids are already dissolved in the water it becomes a weaker solvent and will not extract enough solubles from your coffee. Coffee made with water that has a very high TDS value will taste dull and cloudy. Conversely, water with a very low TDS value produces coffee with edgy, unrefined flavours and exaggerated brightness as the water is a very strong solvent.

Hardness
The formation of limescale in your espresso machine is primarily due to the presence of calcium and magnesium ions in the water, measured as 'hardness'. For this reason it is possible to have a high TDS value, combined with a low 'hardness' value, and limescale will not readily form in your espresso machine.

Hard water does not result in a poor cup of coffee, but it will scale your boiler quickly. Water with a hardness above 90mg/L will always be reduced to a hardness of about 90mg/L as any hardness above this value precipitates out upon boiling and deposits on the inside of your boiler.

Alkalinity
Alkalinity measures a solution's ability to buffer an acid, or its ability to resist becoming more acidic.

It is important to understand that it is quite different to 'alkaline' which is a solution with a pH between 7.01 and 14.

Water with high alkalinity neutralises coffee acids, resulting in less acidic coffee. If alkalinity is too low the coffee will be overly bright and acidic.

How to calculate the alkalinity and hardness values
Bottled waters typically disclose their minerals as mg/L or ppm, rather than mg/L CaCO3 equivalents.

To calculate the alkalinity, multiply the bicarbonate mg/L value stated on the bottle by 0.82.

To calculate the hardness, multiply the calcium mg/L value stated on the bottle by 2.5, and the magnesium mg/L value stated on the bottle by 4.2, then add the two resultants together.

Note: boiler corrosion
Acidic water with low alkalinity can potentially cause corrosion in the boiler of your espresso machine.

Worked example:
Brand: Volvic
pH: 7.0
Dry residue @ 180C: 130mg/L
Chlorides: 13.5mg/L
Calcium: 11.5mg/L
Nitrates: 6.3mg/L
Magnesium: 8.0mg/L
Sulphates: 8.1mg/L
Sodium: 11.6mg/L
Bicarbonates: 71.0mg/L
Potassium: 6.2mg/L
Silica: 31.7mg/L

So, pH = 7, good
TDS/dry residue = 130, good
Hardness = (Calcium x 2.5) + (Magnesium x 4.2) = (11.5 x 2.5) + (8.0 x 4.2) = 28.75 + 33.60 = 62.35, about right
Alkalinity = (Bicarbonate x 0.82) = (71.0 x 0.82) = 58.22, about right

Finding a bottled water that is suitable is surprisingly difficult, as detailed in the table below;


PLEASE click on the above table to enlarge it, so that it becomes legible

I trust this blog has assisted you in your pursuit for espresso nirvana and the protection of your espresso machine.

If you have any questions please get in touch & we will do our best to find the answer for you.

65 comments:

Mintrukpeace said...

Now, I searching for the best information for Espresso machine~~*

and your Blog are very interesting too

i hope you to don't angry me to post this post for backlink

Please comeback to visit my blog too : Espresso machine

I'm sorry , If you think this is spam. but may i thank you again.

Anonymous said...

I can' t but agree.I often wanted to forget about in my site something like that but I conclude you' r faster.
[IMG]http://www.sedonarapidweightloss.com/weightloss-diet/34/b/happy.gif[/IMG]

beste espressomachine said...

I had no idea that we had to take so much of care while choosing the type of water for making coffee.This post was really amazing...!!

Anonymous said...

Everyone loves it when people get together and share views.
Great site, stick with it!
Here is my web blog : weightloss programs

Anonymous said...

Malaysia & Singapore & brunei greatest online blogshop for wholesale & supply korean add-ons,
earrings, earstuds, choker, rings, bracelet, bracelet &
hair add-ons. Promotion 35 % wholesale price cut. Ship Worldwide
Stop by my web blog :: neurociencia

Anonymous said...

Malaysia & Singapore & brunei greatest on the internet blogshop for wholesale
& supply korean accessories, accessories, earstuds, choker, rings,
hair, bracelet & bangle add-ons. Offer 35
% wholesale price cut. Ship Worldwide
My web blog - locksmith slc

Anonymous said...

Thanks for every other informative blog. The place else could I get that kind of
information written in such an ideal means?

I've a project that I'm simply now operating on, and I've been at the glance out for such info.
Here is my web blog ... cheap iPhone 5 for sale online

Anonymous said...

top [url=http://www.001casino.com/]free casino bonus[/url] coincide the latest [url=http://www.casinolasvegass.com/]casino games[/url] unshackled no consign perk at the leading [url=http://www.baywatchcasino.com/]bay anticipate casino
[/url].

Muhammad Amir said...

The kind of water you need for great coffee is at odds best coffee espresso machines with the kind you need to ensure no limescale forms in your espresso machine.

Anonymous said...

Unquestionably believe that which you stated. Your favorite
justification appeared to be on the internet
the easiest thing to be aware of. I say to you, I certainly get irked while people think about
worries that they just do not know about. You
managed to hit the nail upon the top and defined out the whole thing without having
side-effects , people could take a signal. Will likely be back to get more.
Thanks
Here is my site ... ikea furniture assembly service

Anonymous said...

I have read so many articles or reviews about the blogger
lovers except this piece of writing is actually a fastidious piece of
writing, keep it up.

Also visit my weblog ... Nike Air Max Pas Cher

Anonymous said...

I am in fact glad to glance at this blog posts which consists of lots of valuable
facts, thanks for providing such information.

Here is my homepage; Cheap Louis Vuitton Bags

Anonymous said...

We are a gaggle of volunteers and starting a new
scheme in our community. Your web site offered us with helpful information to work on.
You have done an impressive job and our whole neighborhood shall be grateful to you.


Also visit my homepage NFL Jerseys Cheap

Anonymous said...

Informative article, just what I was looking for.


Stop by my blog post http://www.converseshopfr.com/

Anonymous said...

Hello, this weekend is good designed for me, for the reason
that this occasion i am reading this enormous informative piece of
writing here at my house.

my web blog :: Nike Air Jordan Pas Cher

Anonymous said...

Someone necessarily lend a hand to make significantly posts I'd state. That is the very first time I frequented your website page and thus far? I surprised with the research you made to make this actual post amazing. Fantastic job!

Feel free to surf to my homepage ... www.airmaxpro.nl

Anonymous said...

Hi there! I'm at work browsing your blog from my new iphone 4! Just wanted to say I love reading through your blog and look forward to all your posts! Carry on the fantastic work!

My webpage Abercrombie Fitch Belgique

Anonymous said...

Hello there, You have done a fantastic job.

I will certainly digg it and personally recommend
to my friends. I am confident they'll be benefited from this website.

Look into my site: Chaussure Nike Air Max

Anonymous said...

I like reading an article that can make men and women think.
Also, thanks for allowing me to comment!

Look at my weblog - Wholesale Jerseys

Anonymous said...

Hello my family member! I want to say that this post is awesome, great written and include approximately all significant infos.
I would like to peer more posts like this .

Take a look at my blog :: Abercrombie & Fitch

Anonymous said...

Good post. I learn something new and challenging on sites I stumbleupon every day.

It will always be interesting to read content from other writers and use something from
their websites.

Look into my web page - Michael Kors Bags

Anonymous said...

It's fantastic that you are getting thoughts from this paragraph as well as from our discussion made at this time.

Also visit my webpage; Converse

Anonymous said...

Woah! I'm really loving the template/theme of this site. It's simple, уet effective.

A lot of times іt's very difficult to get that "perfect balance" between superb usability and appearance. I must say you have done a superb job with this. In addition, the blog loads super quick for me on Opera. Outstanding Blog!

Also visit my site - universal life insurance for dummies

Anonymous said...

I like reading through a post that will make people think.
Also, thank you for allowing for me to comment!

Visit my weblog :: Click Here

Anonymous said...

My family members always say that I am killing my time here at net,
except I know I am getting experience everyday by reading thes good content.


Have a look at my blog ... Abercrombie & Fitch

Anonymous said...

Truly no matter if someone doesn't understand after that its up to other visitors that they will help, so here it occurs.

my weblog: article source

Anonymous said...

I'm curious to find out what blog system you happen to be working with? I'm having some small
security issues with my latest blog and I'd like to find something more risk-free. Do you have any recommendations?

Also visit my website: related site

Anonymous said...

Can I simply just say what a relief to find an individual who truly knows what
they're talking about online. You definitely know how to bring an issue to light and make it important. More people really need to look at this and understand this side of your story. I was surprised that you are not more popular since you certainly have the gift.

Feel free to surf to my page ... More Info

Anonymous said...

Aw, this was an exceptionally nice post. Finding the time and
actual effort to create a top notch article… but what can
I say… I procrastinate a lot and never manage to get anything done.


Also visit my web page ... Louis Vuitton Bags

Anonymous said...

Fantastic beat ! I wish to apprentice at the same time as you amend your website, how can i subscribe for a weblog site?
The account helped me a acceptable deal.
I were tiny bit familiar of this your broadcast provided
brilliant transparent concept

Also visit my site pointe shoes tip

Anonymous said...

Thanks for one's marvelous posting! I actually enjoyed reading it, you could be a great author. I will be sure to bookmark your blog and will often come back in the foreseeable future. I want to encourage one to continue your great work, have a nice weekend!

Also visit my web site :: Chaussures De Football

Anonymous said...

An іmρгessiνе ѕhаre!
I've just forwarded this onto a coworker who was conducting a little homework on this. And he in fact ordered me lunch due to the fact that I stumbled upon it for him... lol. So let me reword this.... Thanks for the meal!! But yeah, thanx for spending the time to talk about this issue here on your site.

Also visit my website ... DiamondLinks.net

Anonymous said...

Nice blog here! Also your website loads up very fast! What host are
you using? Can I get your affiliate link to your host?
I wish my website loaded up as quickly as yours lol

Here is my blog: Air Jordan Pas Cher

Anonymous said...

Good day! I simply want to give you a huge thumbs up for the excellent info you have got here on this post.
I am returning to your site for more soon.

my weblog; Louis Vuitton Pas Cher

Anonymous said...

Yes!!!!! Thank you sooooo much! Volvic is my most favorite water, so now I have even a better excuse to ensure that my hubby buys it versus his favorite Saint Amand. I'd love to find a similar chart done for bottled waters available in France (or I'll have to do it). :)

Anonymous said...

I love looking through an article that will make people think.
Also, thank you for permitting me to comment!

Here is my website ... cheap nfl jerseys

albina N muro said...

We have been researching the impact of different bottled waters on (i) the taste of coffee, and (ii) its impact on espresso machines. delonghi esam3300 magnifica

Anonymous said...

After I originally left a comment I appear to have clicked the -Notify me when
new comments are added- checkbox and now each time a comment is added I recieve four emails with the exact same comment.
There has to be a means you can remove me from that service?
Thanks a lot!

my blog ... Air Max

Anonymous said...

Really when someone doesn't understand afterward its up to other visitors that they will assist, so here it takes place.

Review my blog - Air Jordan Femme

Anonymous said...

I was more than happy to find this page. I want to to
thank you for ones time due to this fantastic read!
! I definitely loved every little bit of it and I have you bookmarked to look at new information on
your site.

My homepage ... Abercrombie Pas Cher

Anonymous said...

Your method of telling everything in this article
is actually pleasant, all can effortlessly understand it, Thanks a
lot.

My site live girls

Anonymous said...

I was curious if you ever considered changing the layout of
your blog? Its very well written; I love what
youve got to say. But maybe you could a little more in
the way of content so people could connect with it better.
Youve got an awful lot of text for only having one or 2 images.
Maybe you could space it out better?

Also visit my weblog - www.cfnmfever.net

Anonymous said...

When I originally left a comment I seem to have clicked the -Notify me when
new comments are added- checkbox and from now on every
time a comment is added I receive four emails with the exact same comment.
Is there an easy method you are able to remove me from that service?
Kudos!

Review my page - Tory Burch Shoes

Anonymous said...

If you wish for to increase your know-how simply keep visiting this site and be updated with the most recent gossip posted
here.

Review my blog - Abercrombie and Fitch

Anonymous said...

Have you ever thought about adding a little bit more than just your articles?
I mean, what you say is valuable and all.
But just imagine if you added some great graphics
or videos to give your posts more, "pop"! Your content is excellent but with images and clips, this website could definitely be
one of the greatest in its field. Wonderful blog!


My website: web site

Anonymous said...

Its such as you read my mind! You seem to know a lot approximately this, like you wrote the e-book in it or something.
I feel that you just can do with a few percent to
force the message house a bit, however other than that, this is great blog.

An excellent read. I'll definitely be back.

Feel free to visit my webpage; Clicking Here

Anonymous said...

It is perfect time to make some plans for the future and
it's time to be happy. I've read this post and if I could I desire to suggest you few interesting things
or tips. Perhaps you can write next articles referring to
this article. I wish to read even more things about it!


my webpage; Continued

Anonymous said...

I used to be able to find good advice from your blog posts.


Also visit my blog post - hoku-Ei.sakura.Ne.jp

Anonymous said...

Hey There. I discovered your blog using msn. That is a very
neatly written article. I'll make sure to bookmark it and come back to learn extra of your useful info. Thank you for the post. I will definitely comeback.

Also visit my website - web site

Anonymous said...

It's the best time to make some plans for the future and it is time to be happy. I've read this post and if I could I desire to
suggest you few interesting things or advice.

Perhaps you could write next articles referring to this article.
I wish to read even more things about it!

Also visit my web-site ... Louis Vuitton Pas Cher

Anonymous said...

This website was... how do I say it? Relevant!! Finally I've found something which helped me. Thank you!

my weblog :: Wholesale NFL Jerseys

Anonymous said...

Hurrah, that's what I was exploring for, what a information! present here at this webpage, thanks admin of this web page.

Here is my web site :: Cheap Jerseys

Anonymous said...

I am genuinely grateful to the owner of this website who has shared this great article at at this time.


My webpage Kobe Bryant Shoes 2013

Anonymous said...

Attractive component to content. I simply stumbled upon
your blog and in accession capital to assert that
I get in fact enjoyed account your blog posts. Anyway
I will be subscribing in your augment or even I fulfillment
you get admission to persistently quickly.

my blog post; Nike ID - whatsot.com -

Anonymous said...

I just could not go away your website prior to suggesting that I really enjoyed the usual information a person supply
for your visitors? Is going to be back incessantly to check
out new posts

my site - Going Here

Anonymous said...

Hello! Someone in my Facebook group shared this website with us so I
came to give it a look. I'm definitely enjoying the information. I'm
bookmarking and will be tweeting this to my followers! Superb blog and
great design and style.

Feel free to surf to my blog :: Soldes Air Jordan ()

Anonymous said...

This site was... how do I say it? Relevant!! Finally I have found
something that helped me. Kudos!

Here is my webpage binaural beats

Anonymous said...

Aw, this was a very nice post. Taking the time and actual effort to create a very good article…
but what can I say… I put things off a whole lot and don't manage to get nearly anything done.

Feel free to surf to my web blog - Chaussures Foot

Anonymous said...

I'm impressed, I have to admit. Rarely do I come across a blog that's
both equally educative and engaging, and let
me tell you, you've hit the nail on the head. The problem is something too few men and women are speaking intelligently about. Now i'm very happy that I came across this during my hunt for something concerning this.


Here is my web site - Cheap Jerseys

Anonymous said...

Pretty! This has been an extremely wonderful article. Thanks
for supplying these details.

Also visit my blog post: Air Max Femme ()

Anonymous said...

Hey there, You've done a fantastic job. I'll certainly digg it and
personally suggest to my friends. I'm confident they'll be benefited from this website.


Take a look at my web site :: New LeBron Shoes

Anonymous said...

I am really enjoying the theme/design of your website. Do you ever run into any web
browser compatibility problems? A handful of my blog audience have complained about my website not working correctly in Explorer but looks great in
Opera. Do you have any recommendations to help fix this issue?


my webpage; New Kevin Durant Shoes

George Morrison said...

Thanks intended for shearing such a pleasant and become valuable article. I favor it nearly all in addition to value anyone with this excellent article.
Coffee cups
Espresso coffee cups
espresso coffee
4 oz coffee cups

Kimberly L. Waters said...

Cricut machine allows you to do your projects quicker. We tried to help our audiences to select what the best Cricut machine is for them.
Cricut machine

JoxaAxL said...

Kangen Water Jakarta Timur
Kangen Water Tangerang