Exam Focus
- Water makes up more than 90 percent of beer by weight.
- Water contains minerals that may be essential, desirable, or undesirable.
- Modern brewers adjust water chemistry for the beer being brewed.
What to know
Brewing water is not just dilution; minerals and pH influence the mash and can shape how malt, hops, and bitterness present.
How it applies
CBS candidates do not need advanced water chemistry, but should know water can affect beer character and regional brewing traditions.
- Water makes up more than 90 percent of beer by weight.
- Water contains minerals that may be essential, desirable, or undesirable.
- Modern brewers adjust water chemistry for the beer being brewed.
Other Certification Notes
Certified Cicerone® Open the Certified Cicerone® topic page
Exam Focus
- Explain water as the largest beer ingredient and a process variable.
- Connect mineral profile, pH, alkalinity, sulfate, chloride, and chlorine/chloramine to brewing outcome.
- Apply water knowledge to flavor, mash performance, and defect prevention.
Mechanism
Brewing liquor chemistry matters because brewing is a chain of cause and effect. Ingredient composition, process timing, temperature, oxygen exposure, pH, sanitation, and yeast performance all change what reaches the glass. The Cicerone®-level goal is not to run the brewhouse, but to explain how a choice upstream becomes aroma, flavor, body, clarity, carbonation, or shelf-life downstream.
Effect table
| Variable | Finished-beer effect | Quality risk if poorly controlled | | --- | --- | --- | | Ingredient selection | Flavor, color, body, fermentability | Style mismatch or harsh character | | Time and temperature | Extraction, conversion, fermentation, maturation | Thin body, solventy alcohol, sulfur, haze, or stale flavor | | Oxygen and sanitation | Yeast health before fermentation; staling after fermentation | Slow fermentation, oxidation, or contamination | | Separation and packaging | Clarity, stability, carbonation retention | Sediment, oxygen pickup, overcarbonation, or microbial spoilage |
Applied evaluation
When evaluating a beer, treat brewing liquor composition as one possible source, not a guess. Link the observation to evidence: high roast plus dry finish suggests dark roasted grain; cooked-corn aroma in a pale lager may suggest DMS; sharp astringency can point to tannin extraction, liquor chemistry, or process issues. State what would confirm the inference and what other causes remain plausible.
Worked process link
Test brewing liquor composition by tracing one sensory outcome backward. If the beer is thin, harsh, hazy, solventy, underattenuated, stale, or unusually sweet, list the plausible ingredient and process causes before choosing the most likely one. A process explanation should connect mechanism to result: temperature changes extraction or fermentation, oxygen changes yeast health or staling, and separation or packaging changes clarity, stability, and carbonation. That is the level of reasoning expected from a beer professional.
Why It Matters
- Water gives servers a practical checkpoint before beer reaches a guest.
- Knowing this topic prevents avoidable quality problems and supports clear guest communication.
Key Terms
- Water chemistry
- The mineral and pH profile of brewing water.
- Minerality
- Sensory or process contribution from dissolved minerals.
- Mash pH
- Acidity level during mashing that affects enzyme activity and extraction.