Fast Fact

The Irish city of Dublin has mineral-rich hard water, which is ideal for brewing stout beers such as Guinness.


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Homebrew Header 

If you’re a WaterOne customer who enjoys homebrewing, you’re in luck.  With the help of the Johnson County Brewing Society, we’ve put together information about water quality that may be of interest to you and your passion for making beer.

How water affects beer

From stouts to pilsners, the malted grain in different types of beer will benefit from various water profiles.  In addition to removing chloramines and chlorine from water, many brewers like to modify their water with salts and acids in order to achieve a certain mash pH or to enhance certain flavors.  Hardness and alkalinity affect mash pH and are largely influenced by the amount of calcium, magnesium and bicarbonate in water.  The primary "flavor ions" are sodium, chloride, and sulfate.  

The chart below contains recent data about the amount of these ions in WaterOne’s tap water, and may serve as a useful starting point if you plan on modifying your water profile for a particular brew.  For tools to help you calculate and adjust your water for different beer types, refer to the resources listed below.




Chloride (Cl-)

250 ppm

41 ppm

22 ppm – 116 ppm

Sulfate (SO42-)

250 ppm

171 ppm

115 ppm – 215 ppm

Calcium (Ca)


36 ppm

25 ppm – 49 ppm

Potassium (K+)

100 ppm

6.3 ppm

5.4 ppm – 7.0 ppm

Sodium (Na+)

100 ppm

57 ppm

43 ppm – 78 ppm

Magnesium (Mg2+ )

150 ppm (as CaCO3)
36 ppm (as Mg)

15 ppm

8 ppm – 19 ppm

Alkalinity (bicarbonate)

300 ppm (as CaCO3)

32 ppm

22 ppm - 40 ppm

Alkalinity (carbonate)

300 ppm (as CaCO3)

30 ppm

24 ppm - 38 ppm


8.5 pH units

9.6 pH units

9.5 – 9.7 pH units

Results for 1st Quarter 2020. Refer to WaterOne’s 2019 Water Quality Report for additional info.

*Note about PH: Acceptable Limits for Water Quality Parameters, such as pH, are determined based on each utility's water quality conditions and corrosion control requirements under the Lead & Copper Rule (LCR). These "Acceptable Limits" must be approved by the State of Kansas.

WaterOne’s Consistent Quality

Our award-winning treatment process ensures that our tap water is pure and consistent.  Our water constantly undergoes rigorous quality control checks, which helps ensure that seasonal variance is marginal.  Fluctuations that do occur are usually caused by changes in our source water from the Kansas and Missouri rivers, such as large rain events which can reduce mineral content.

See WaterOne’s Annual Water Quality Report

Resources for Homebrewers

Bru’n Water Online. By Martin Brungard. In-depth articles and tools for homebrewers on how to adjust their water profile.

Water: A Comprehensive Guide for Brewers (Brewing Elements Series).  By John Palmer and Colin Kaminski.  A comprehensive reference about how water affects brewing chemistry. 

Johnson County Brewing Society.  Social and educational organization for local homebrewing enthusiasts. 

American Homebrewers Association.  National organization that promotes homebrewing in the United States.