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In the particular section of the city I live in, the tap water has a poor taste. I use a Pur brand water filter which improves the taste significantly (although it is still poor relative to bottled water).

For extract brewing, I purchase 6, 1-gallon water jugs from Wall-Mart. This adds roughly $10 to each batch.

I should hopefully begin All-grain brewing soon enough, and wanted to switch to filtered tap water in order to reduce cost.

I've been able to locate the mineral composition of the water for my section of the city.

By filtering my water through the consumer water filters, will the mineral composition of the tap water be altered, rendering the information I have gathered useless?

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1 Answer 1

Of course the filter takes out -roughly said- some of the character of your water, the bigger parts are filtered out. By just tasting the before and after results you will note the difference (or not). The smaller parts inside the water (e.g. other minerals and the added cleaners like chlorine) will not disappear. In some tap water you will still find the smaller parts of drugs people get prescribed, or the rest of other drugs without prescription :-). As a matter of fact all these components are not declared by your local water authority as legislation does not force them do declare beneath some values.

The second step is to look at the membrane of the filter, the finer the membrane the more minerals are sieved out. The more you take out, less lively the water will be. And naturally this has its effects on taste.

Here in Amsterdam we use normal tap water as the quality is good. A friend of mine is a professional crafts brewer, and he experiments also with filtering water for every new type of beer, so this is not a rare thing to think of. For demineralizing water often osmosis techniques are used, then you need to make labo analysis but for home brewing this way out of reach.

And don't forget to read the RELATED topics in the right bar of this page, there are many answers to your question.

Normal tap water should do. Or a combination of filtered and bottled water.

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