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🌊 Why Water Quality Matters More Than Most People Realize

Water isn’t just a carrier — it’s an active chemical participant in extraction. The minerals dissolved in water determine which flavor compounds dissolve, how fast they dissolve, and how they taste once extracted. Even perfect beans and a dialed‑in grinder can produce a disappointing cup if the water chemistry is off. coffeester.com How minerals influence flavor • Calcium & magnesium bind to flavor compounds and pull them into solution. • Bicarbonate buffers acidity, shaping brightness vs. dullness. • Chloride enhances sweetness. • Sulfates increase perceived bitterness and floral sharpness. thirdspaceco... This means water chemistry affects every other brewing variable simultaneously — grind size, brew temperature, contact time, and ratio. coffeester.com --- 🔬 The Key Minerals in Coffee Water (Explained Simply) Below are the minerals that matter most, what they do, and how they affect your cup. 1. Calcium (Ca²⁺) • Boosts body and mouthfeel. • Helps extract heavier flavor compounds. • Too much → chalky or muddy flavor + scale buildup. towerofrecor... 2. Magnesium (Mg²⁺) • Extracts bright, fruity, aromatic compounds. • Often preferred for light roasts. • Enhances sweetness and complexity. towerofrecor... 3. Bicarbonate (HCO₃⁻) • Buffers acidity. • Moderate levels soften sharp acids. • High levels flatten flavor and kill brightness. • Low levels make coffee taste sour or sharp. thirdspaceco... 4. Chloride (Cl⁻) • Enhances sweetness and fullness. • Ideal for balanced espresso. thirdspaceco... 5. Sulfates (SO₄²⁻) • Increase bitterness and floral sharpness. • Useful for bright pour‑overs. thirdspaceco... --- 📏 SCA Water Standards (2026) The Specialty Coffee Association defines exact mineral targets for optimal brewing. These are the most widely accepted benchmarks: towerofrecor... Parameter SCA Ideal Acceptable Range Why It Matters TDS 150 ppm 75–250 ppm Controls extraction strength Hardness (Ca + Mg) 68 mg/L 17–85 mg/L Drives extraction + body Alkalinity (bicarbonate) 40 mg/L 40–70 mg/L Buffers acidity pH 7.0 6.5–7.5 Affects perceived acidity Sodium 10 mg/L 0–30 mg/L Enhances sweetness Chlorine 0 mg/L 0 Off‑flavors + equipment damage

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