A Cup of Coffee is 98% Water. You Filter the Coffee – Why not the Water?

This article was originally written in 11 2021 and has since been updated in 06 2026 to reflect new findings and data points.

TL;DR

  • Coffee is 98% water, so the water you use is the single biggest variable in cup quality, equipment lifespan, and brew-to-brew consistency.
  • Water mineral composition directly shapes coffee’s body, crema, and aroma
  • Over-soft water makes coffee taste bitter; over-hard water flattens aroma
  • Properly filtered water balances calcium and magnesium for optimal extraction

Great water. Great coffee and baked goods.

Water is essential – to brewing coffee, baking pastries, cleaning kitchen equipment, and other tasks. But water is more than simply H2O. It typically contains a variety of minerals and other dissolved solids that can vary greatly from region to region. Although invisible to the naked eye, these can have a major impact on the taste, consistency and appearance of beverages and baked goods. To help achieve the best brews and the tastiest treats, VIVREAU offers a broad range of filters to tailor water to unique needs.

‘Better crema, finer aroma, improved taste – with the right water

Coffee is part and parcel of our modern lifestyles. And the quality of the water that goes into each and every cup makes a difference. If the coffee tastes bitter, for example, overly soft water is generally the culprit. But excessively hard water prevents the aroma from developing, resulting in blandness.

With VIVREAU filtration systems, it is possible to optimise tap water for coffee-making, whatever the mineral composition of the local supply. The filtered water contains a balanced mix of minerals, such as calcium and magnesium, and is ideal for brewing coffee. Any unwanted elements that could impact taste or aroma are effectively removed. 

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‘Delicious water for delicious baked goods

If bakeries are to survive and thrive in today’s fiercely competitive environment, they must serve freshly made, attractive goods. To ensure first-rate results every time, the quality of the dough is key – and the water composition, too, must be just right.

Water is employed, for instance, in the steaming process that gives a lovely sheen to light, fluffy baked goods. And when dishwashers are subject to heavy use, the right water composition can ensure sparkling results.

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Protect your equipment – and your bottom line.

Not only can VIVREAU filtration systems improve the taste of your beverages, VIVREAU-enhanced water also extends the service life of your coffee-making and other equipment. All steam nozzles and other key components are ­protected against limescale and mineral deposits. By guarding against damage in this way, you increase the operational avail­ability of your machinery. And by avoiding repairs and downtime, you generate savings that boost your ­bottom line. A comprehensive range of VIVREAU water filters means you can be sure of finding the right choice for your business.

What does the right water for specialty coffee look like in 2026?

In 2026, specialty coffee operators are more focused than ever on the one ingredient that makes up nearly the entire cup: water. The Specialty Coffee Association’s Water Quality Standards still point to the same fundamentals — total dissolved solids in the 75 to 250 ppm range, balanced calcium and magnesium hardness, and a near-neutral pH — because mineral chemistry is what unlocks aroma, sweetness, and body during extraction.

When water sits outside that window, the cup suffers. Soft, mineral-poor water under-extracts and tastes thin or bitter, while hard water over-buffers and mutes acidity. That is why operators serving high-volume cafés, hotel coffee programs, and quick-service beverage stations now treat water as a recipe input rather than a utility. Calibrated filtration adjusts the mineral profile to match the bean, the equipment, and the brew method.

For commercial environments, filtration also functions as preventative maintenance. Scale buildup remains one of the leading causes of espresso machine downtime, and tailoring water hardness at the source protects boilers, steam nozzles, and hot water lines from costly service calls. The strongest coffee programs in 2026 are pairing premium beans with a water spec, not leaving cup quality to whatever flows out of the tap.

VIVREAU’s Answer

PURITY and PURITY C filtration products from VIVREAU Professional cater to a wide range of café and bakery requirements. Filtration remains constant over the entire life cycle, consistently tailoring the water’s mineral composition to the task at hand – for reliably great-tasting results, whatever the local water supply.

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PURITY C Quell ST Advanced

The professional solution for pure coffee enjoyment – specially developed for scale water conditions.

FAQs

  • What is the ideal mineral content of water for brewing coffee?

    The Specialty Coffee Association recommends a total dissolved solids range of 75 to 250 ppm with balanced calcium and magnesium hardness and a near-neutral pH. Water within this range supports optimal extraction, balanced body, and full aroma development without leaving the cup flat or astringent.

  • How does water filtration improve commercial coffee equipment performance?

    Filtration removes scale-forming minerals, chlorine, and unwanted particulates before they reach the boiler, group heads, and steam nozzles. That reduces limescale buildup, lowers maintenance frequency, prevents premature component failure, and extends the operating life of espresso machines and bean-to-cup systems.

  • Why does water taste affect coffee differently than just drinking it plain?

    Coffee is roughly 98% water, so even subtle off-flavors, chlorine notes, or mineral imbalances in the source water are amplified during brewing. Hot extraction pulls flavor compounds from the grounds while simultaneously concentrating whatever is in the water, which is why filtered water with the right mineral profile produces a noticeably cleaner, fuller cup than unfiltered tap water.

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