Brewing water
Burton-on-Trent water
Extremely high in calcium sulphate, the water that made Burton the centre of world pale ale brewing and gave brewing the term "Burtonisation".
Burton-on-Trent, United Kingdom
Read this as a reconstruction. Figures are the widely-reproduced historical analysis, stored as a range because the underlying supply varied by well, by season and over time. Treat them as an indication of relative character, not as a specification to dose water against. Burton breweries drew from several different wells whose sulphate content differed substantially, so no single figure represents "Burton water".
The sulphate concentration here is extraordinary by any standard — an order of magnitude above Munich and around a hundred times that of Pilsen. It is dissolved gypsum, picked up as groundwater passes through the local strata.
Burtonisation, the deliberate addition of gypsum to brewing liquor, is the direct descendant of this discovery and remains the most widely practised water adjustment in brewing. It is worth being clear about what it does: it shifts perception toward dryness and hop bite. It does not by itself make a pale ale.
Mineral content
| Ion | mg/l | What it does |
|---|---|---|
| Calcium (Ca²⁺) | 200–350 ppm | Lowers mash pH, supports enzyme and protein behaviour, aids yeast flocculation and clarity. Close to flavour-neutral itself. |
| Magnesium (Mg²⁺) | 25–60 ppm | A yeast nutrient in small amounts. Above roughly 30 mg/l it begins to read as sour or metallic. |
| Sodium (Na⁺) | 15–40 ppm | Rounds and accentuates sweetness at moderate levels. With high sulphate it turns harsh rather than full. |
| Chloride (Cl⁻) | 20–50 ppm | Tends to accentuate malt fullness, body and roundness. A tendency in perception, not an additive sweetness. |
| Sulphate (SO₄²⁻) | 450–800 ppm | Tends to accentuate hop bitterness and drive a drier finish. At high levels it reads as harsh and minerally rather than simply more bitter. |
| Bicarbonate (HCO₃⁻) | 200–320 ppm | The alkalinity that resists mash acidification. High bicarbonate needs dark, acidic malt to balance it — which is why alkaline-water cities brewed dark beer. |
Overall hardness: very hard. Balance: strongly sulphate (chloride:sulphate roughly 0.06:1). The ratio is a shorthand the trade finds useful for describing whether a water pushes a beer toward crispness or fullness. It is not a formula, and two waters with the same ratio at very different total concentrations do not behave alike.
Historical context
High sulphate accentuates hop bitterness and drives a crisp, dry finish; abundant calcium lowers mash pH and improves protein coagulation, clarity and yeast health. The combination suited pale, heavily-hopped, export-stable beer, which is why the same recipe brewed in Burton outperformed one brewed in London.
Styles associated with this water
Association, not causation. Brewers selected recipes that worked with the water available to them; the water did not design the beer.
- English IPA
The original IPA: a strong, firmly bitter English pale ale with earthy, floral hop character and a dry, mineral finish.
- English pale ale
The bottled British pale ale tradition: biscuity malt, earthy and floral English hops, and a firm, dry, mineral finish.
- Ordinary bitter
The everyday British cask ale: low in strength, gently bitter, and built to be drunk in pints over a whole evening.
Questions
Why does Burton water make better pale ale?
Two effects. Its high calcium drops mash pH into a range where enzymes work efficiently and the finished beer is brighter and more stable. Its very high sulphate sharpens the perception of hop bitterness and pushes the finish drier. Both suit pale, hoppy beer specifically — the same water makes dark beer taste harsh.
What is the "Burton snatch"?
A sulphurous note, sometimes likened to struck matches, historically associated with Burton beers and attributed to the sulphate content of the water interacting with fermentation. It was regarded as a mark of authenticity rather than a fault.
Other water profiles
- Balanced reference profile — moderately hard, balanced.
- Dortmund water — hard, sulphate leaning.
- Dublin water — hard, sulphate leaning.
- Edinburgh water — hard, sulphate leaning.
- London water — moderately hard, balanced.
- Munich water — moderately hard, balanced.
- Pilsen water — very soft, balanced.
- Vienna water — hard, sulphate leaning.
Last reviewed 2026-08-15.
Evidence
What BeerHQ knows about this, and how. Every statement carries the state of the evidence behind it rather than being presented flatly as fact.
The confident round figures given for historic brewing city water profiles are much shakier than their presentation suggests, and how seriously to take them is genuinely argued.
— The figures are widely reproduced across brewing literature and are useful as a description of relative character between cities.
— They typically derive from single nineteenth-century analyses of one source, while cities drew from multiple wells of differing chemistry and brewers treated their water before use — so they describe a supply rather than what went into a mash.
BeerHQ stores them as ranges with a mandatory per-profile caveat, and treats them as indicative of relative character rather than as specifications.
Genuinely contested Credible sources disagree, so both positions are given rather than one.
Sources: Water: A Comprehensive Guide for Brewers — print; Beer: The Story of the Pint — print
The strength of the claim that a city’s water determined its beer style is contested: the correlation is real, but the causal account is weaker and more contingent than the way it is usually stated.
— The conventional account: Burton’s gypsum-rich water made pale ale possible there and Dublin’s alkaline water made stout the practical choice, so water determined regional style.
— The qualified account: brewers worked with the water they had and selected recipes that survived it, which is selection rather than determination. Water treatment, and Burtonisation in particular, severed the link entirely once available — any brewery could then reproduce any profile.
BeerHQ presents water as a strong constraint on what worked historically, not as a designer of styles.
Genuinely contested Credible sources disagree, so both positions are given rather than one.
Sources: Water: A Comprehensive Guide for Brewers — print; Beer: The Story of the Pint — print
Magnesium functions as a yeast nutrient at low levels but begins to read as sour or metallic above roughly 30 mg/L, which is one reason the full Burton profile is rarely reproduced literally.
Backed by a source
Source: Water: A Comprehensive Guide for Brewers — print