Water
Water is the base liquid of nearly every brewed, infused, and fermented drink. It acts as the solvent that draws flavor, color, and caffeine from tea leaves, coffee grounds, and botanicals, and as the medium in which yeasts and bacteria convert sugars into fermented beverages. It is also the most widely consumed drink in its own right.
Usage in beverages
Water makes up the great majority of beer, mead, kombucha, tea, and coffee. It is used hot for infusion and decoction, and cool or warm for mashing grain, diluting honey, and dissolving sugar for fermentation. It is added to adjust strength before bottling, and its minerals are sometimes deliberately modified to suit a style. In modern no- and low-alcohol drinks it is the backbone of sparkling infusions, cold brews, shrubs, and cultured sodas such as water kefir.
In depth
Honey and Water: Mead, Hydromel, and Tej
Fermenting honey diluted with water may be among humanity's oldest drink-making practices, because honey alone is too concentrated for yeast to work. The ratio of honey to water determines a drink's sweetness and strength. Lighter, lower-alcohol versions came to be called hydromel, literally "water-honey." Roman agricultural writers described honeyed water made from rainwater stored for years, with boiled spring water as the fallback. That instruction reflects an early awareness that clean water was essential. In Ethiopia, the honey drink tej is paired with a sweeter, briefer, and less alcoholic honey-water preparation called berz. Today, light sparkling session meads continue this tradition of water-forward honey drinks.[1]
Chinese Tea Culture and the Connoisseurship of Water
Tea is, at its simplest, water transformed by leaves, and Chinese tea culture made the choice of water an art. Early tea was boiled from compressed cakes, often with added flavorings. Over the centuries, preparation shifted toward steeping loose leaves in hot water. The 8th-century Tang writer Lu Yu, author of The Classic of Tea, famously ranked water sources, favoring clear mountain spring water over river water and placing well water last. He also paid close attention to the stages of boiling. As tea spread to Japan, Korea, Vietnam, and Central Asia, and later to Europe, attention to water temperature and quality traveled with it. A 17th-century English traveler's description of tea as merely water with an herb boiled in it captures how central the liquid was. After plain water, tea remains the most widely consumed beverage in the world.[2]
Coffee in Yemen and the Ottoman World
Coffee emerged as a drink in 15th-century Yemen, where Sufi communities brewed roasted seeds in hot water to stay alert through night devotions. From the Red Sea ports, the custom spread across the Middle East and North Africa, and coffeehouses became fixtures of Ottoman cities. A 16th-century European visitor described the drink as a black brew made simply of water and the fruit of a shrub, passed around in a shared cup. Whether boiled in a small pot, steeped, or later filtered and pressed under pressure, coffee depends on water to extract its soluble compounds. Water hardness and temperature remain key variables for anyone brewing it.[3]
Sake and Japan's Brewing Waters
In Japan, rice, kōji mold, yeast, and water are the essential ingredients of sake, and water shaped the geography of the industry. During the Edo period, brewers relocated to the coastal Nada district near modern Kobe. There, favorable weather and well-suited water supported vigorous fermentation, and the location made shipping to the growing capital easy. Nada's mineral-rich well water became famous for producing robust, dry sake, while softer waters elsewhere were associated with gentler styles. Water also plays a role at the end of the process. Undiluted sake is relatively strong, so brewers typically add water before bottling to bring it to drinking strength.[4]
European Brewing Towns and Mineral Profiles
Before brewers could easily adjust water chemistry, the local supply determined which beer styles a town could make well. The hard, carbonate-rich water of Dublin suited dark, roasted stouts. The very soft water of the Plzeň region in Bohemia allowed the pale, delicate golden lager known as Pilsner. The gypsum-laden wells of Burton upon Trent in England favored crisp, bitter pale ales so strongly that brewers elsewhere began adding gypsum to imitate them, a practice called Burtonisation. The Bavarian purity rule of 1516 named water as one of only three permitted beer ingredients. Today, brewers of both alcoholic and alcohol-free beer routinely treat their water to match the mineral profile of a target style.[5]
Cultured Low-Alcohol Drinks: Kombucha and Water Kefir
Fermented drinks with little or no alcohol also rely on water and are sensitive to its treatment. Kombucha, a sweetened tea fermented by a culture of bacteria and yeast, is made by dissolving sugar in boiling water that is free of chlorine, because residual disinfectant can harm the living culture. The finished drink is about 95 percent water. Water kefir, also known as tibicos, uses a different culture that thrives in plain sugared water rather than milk. It yields a lightly fizzy, tangy soda-like drink. These traditions spread from Eastern Europe and Asia to a worldwide home-brewing and commercial audience in the late 20th and early 21st centuries.[6]
Water Today: Solvent, Mixer, and Drink in Its Own Right
Water's ability to dissolve a wide range of minerals and organic compounds makes it the indispensable solvent of the drinks world. Natural water almost always carries dissolved substances, and those trace minerals are why spring and mineral waters taste distinct from one another. In contemporary no- and low-alcohol beverage culture, water serves in several roles. It is the base of cold brews and botanical infusions, it is carbonated to lift shrubs and cordials, and it is filtered or remineralized to standardize tea and coffee. It is also offered on its own, still or sparkling, as the most universal drink of all.[7]