Although you may have learned that pure water is H2O, water for brewing must contain much more. Not only do dissolved minerals and ions affect the taste of ingredients in beer, they also provide necessary nutrients for growing yeast and buffering reactions relating to the pH of the water and the grains. Common dissolved minerals found in brewing water include:

Water from different sources around the world have different concentrations of these minerals that are naturally dissolved in it. The water found in Burton, England has a different profile from the water found in Pilsen, Czech Republic. These differences in water is what partially led to different styles of beer. Pilsner beer became possible due to the extremely soft water found in Pilsen, while the sulfate content in the water around Burton favored hoppy beers that became what we know as Pale Ale.

Water Sources

Tap Water

The rule of thumb is that if your water tastes okay to drink then it will be okay to brew with.

Bottled Spring Water

Bottled spring water is generally fine to use in many beer styles, however one never knows truly what is in the water. Spring water, being from a ground source can be particularly hard. In addition, many bottlers use multiple sources for their water, resulting in variation in mineral content from shipment to shipment. Many manufactures publish water profiles, but often these profiles have such a wide range in the potential mineral content that the profile is often generally useless to a brewer.

Distilled Water

Reverse Osmosis

Water Treatment

Chlorine

Chloramine

Salt and Mineral Additions

• Baking Soda
• Chalk
• Gypsum
• Table Salt - NaCl

Water Substitutes

Even though water is usually considered one of the basic ingredients of beer, some adventurous home brewers have tried replacing brewing water with other liquids. Almost any water-based liquid can theoretically be used in brewing, and can contribute flavor, fermentables, or both. Examples that have been tried, and reported as successful by their brewers, include everything from unconcentrated maple sap to Mountain Dew.