The Hidden Variable in Your Morning Brew Filter coffee is over 98% water. Espresso, depending on your recipe, sits between 87% and 93%. Despite these overwhelming percentages, most home baristas obsess over expensive grinders and rare geisha beans while ignoring the primary solvent that dictates flavor. If your coffee tastes vibrant and fruity at the local shop but flat and dull at home, the culprit isn't your technique; it's your tap. Understanding water chemistry is the single most effective way to improve your coffee quality, far outweighing the impact of a gear upgrade. Water is more than just a liquid; it's a complex solution of minerals that either assist or hinder the extraction of coffee compounds. To master your brew, you must move past the idea that "clean" water is enough. We are looking for specific chemical interactions that manage acidity, body, and sweetness. This guide will provide the framework to stop guessing and start engineering the perfect solvent for your beans. Tools and Materials for Water Customization Before adjusting your chemistry, you need a baseline. To effectively tailor your water, gather the following essentials: * **Base Water:** Start with distilled water, deionized water, or water from a ZeroWater filter. This provides a blank slate (0 PPM). * **Measuring Tools:** An electroconductivity meter (TDS meter) to check total dissolved solids and a high-precision scale (0.01g accuracy) for weighing minerals. * **Minerals/Concentrates:** Baking soda (sodium bicarbonate) or potassium bicarbonate for alkalinity. Epsom salt (magnesium sulfate) or calcium chloride for hardness. * **Ready-made Solutions:** If DIY chemistry feels daunting, use pre-mixed mineral packets like Third Wave Water or liquid concentrates from Lotus Coffee Water. Step-by-Step Instructions: Mastering the Chemistry 1. Identify Your Hardness Profiles You must distinguish between **General Hardness (GH)** and **Carbonate Hardness (KH)**. GH represents the "permanent" hardness—primarily magnesium and calcium. These minerals are the heavy lifters that interact with coffee compounds to influence sweetness and body. KH, or "temporary" hardness, refers to bicarbonates. These act as a buffer, neutralizing the natural organic acids in coffee. If your KH is too high, your coffee will taste flat; if it's too low, the acidity can become sharp and overwhelming. 2. Strip Your Water Do not try to "fix" tap water unless your local supply is already exceptionally soft (below 50 PPM), like in Melbourne or New York City. Most municipal water contains chlorine, iron, and excessive bicarbonates that are nearly impossible to balance manually. Use a Reverse Osmosis system or buy distilled jugs to ensure you are starting from zero. 3. Add Your Buffer (KH) For filter coffee, target a bicarbonate count between 5 and 20 PPM if you prefer high-clarity, acidic light roasts. If you prefer a more balanced, traditional profile, aim for 40 PPM. Use a precision dropper to add your bicarbonate concentrate to your base water. This step is the most critical for flavor perception. 4. Add Your Hardness (GH) Add magnesium or calcium to reach a total GH of 40 to 80 PPM. Magnesium tends to highlight complexity and acidity, while calcium provides a heavier mouthfeel and tactile sweetness. A 1:1 ratio is a safe starting point for most brewers. 5. Post-Mineralization Testing Recent research suggests that minerals don't necessarily change the extraction of organic acids during the brewing process itself; instead, they season the final cup. This means you can actually add mineral drops directly to your brewed coffee to adjust flavor on the fly. If the cup is too sour, add a drop of bicarbonate. If it lacks "pop," add a drop of magnesium. Tips and Troubleshooting If your coffee tastes "chalky," you have likely overshot your calcium content. Scale buildup in your kettle or espresso machine is a sign of excessive GH. To protect expensive equipment, consider the Dr. Pavlis recipe: skip the GH minerals entirely and use only 45-60 PPM of potassium bicarbonate. This prevents both scale and corrosion while providing enough buffering for a pleasant espresso. For those using tap water, a simple trick to increase perceived acidity is to boil your water for 10 minutes. This causes some bicarbonates to convert to CO2 and escape, potentially reducing your KH by up to 40% and allowing the coffee's natural brightness to shine through. Expected Outcomes and Benefits By controlling your water, you remove the most significant variable in coffee brewing. You can expect a massive increase in flavor clarity, the elimination of metallic or "flat" off-notes, and the ability to replicate the high-end cafe experience in your own kitchen. Furthermore, using tailored, scale-free water will significantly extend the lifespan of your brewing hardware, saving you from costly repairs and descaling cycles. You aren't just making water; you're building the foundation for the best coffee you've ever tasted.
Maxwell Colonna-Dashwood
People
European Coffee Trip (5 mentions) praises Maxwell Colonna-Dashwood's The Coffee Dictionary as an essential primer, while Lance Hedrick (2 mentions) cites his grind coarsening techniques in Knowing this will Change Everything! Ultimate Guide to Water for Coffee to prevent bitterness.
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The Spirit of Scottish Coffee Culture Edinburgh has emerged as a powerhouse in the European specialty scene, blending historical grandeur with a progressive approach to the bean. The city’s baristas don't just serve caffeine; they curate experiences that respect the heritage of the roast while pushing technical boundaries. From the narrow closes of the Old Town to the airy spaces of the West End, these shops showcase a community-driven spirit where competitors share knowledge and recommend one another with genuine warmth. Precision Brewing at Fortitude and Lowdown Fortitude Coffee sets the gold standard for consistency near York Place. While the flat white remains the undisputed king of orders here, their commitment to filter coffee through the Kalita Wave demonstrates a dedication to clarity and brightness. Just a short walk away, Lowdown Coffee offers a masterclass in minimalist design and technical focus. By utilizing a Mahlkönig EK43 twin grinder, they ensure every extraction—like their Ethiopian offerings from Maxwell Colonna-Dashwood—retains its complex floral profile. High-Tech Extractions at Brew Lab For those who appreciate the intersection of science and flavor, Brew Lab Coffee stands as one of the most impressively equipped labs in the UK. They employ the Victoria Arduino Black Eagle with gravimetric technology, ensuring every shot of espresso hits the precise weight and timing required for perfection. This level of investment in equipment reflects the city's broader move toward professionalizing the home-grown coffee movement. Character and Craft in the Old Town Artisan Roast provides a soul-stirring contrast with its "living room" atmosphere, famous for its cheeky "JK Rowling never wrote here" sign. Despite the playfulness, their roasting is serious business, influencing the entire Scottish specialty landscape. Further into the heart of the city, CULT Espresso and Filament Coffee continue this tradition of high-engagement service. Filament Coffee specifically celebrates the AeroPress, highlighting the versatility of immersion brewing for Kenyan beans. A Community United by the Cup Edinburgh’s coffee scene is defined by its lack of pretension. Whether it is the repurposed bank interior of Cairngorm Coffee or the tiny, bustling storefront of CULT Espresso, the focus remains on the guest. As the city prepares for the annual Edinburgh Festival, these shops stand ready to showcase the very best of Scottish hospitality and global coffee innovation.
Jul 26, 2016Morning Rituals and Colombian Terroir The day begins in London with a deep respect for origin. We started with a brew from Workshop Coffee, focusing on a specific lot from Buena Vista in Colombia. Produced by Arri Medina, this coffee typically shines as a delicate filter roast. However, the artistry of coffee allows for transformation. For the festival, they reimagined this bean into an espresso profile, served at the Mechanic booth by James Bailey. Seeing a 2015 Coffee Masters Champion handle these beans reminds us that technique is just as vital as the soil the cherry grew in. The Pulse of the London Coffee Festival Stepping into the London Coffee Festival on its first public day is an immersive sensory experience. The energy is electric, fueled by a massive crowd of enthusiasts and professionals alike. This isn't just a gathering; it's the heart of the European coffee scene. We moved quickly to the UK Barista Championship stage, where the tension of competition meets the highest standards of preparation. Every pull of a lever and every milk texture represents months of grueling practice. The Geisha Capsule Revolution The most controversial and exciting moment arrived when we met Maxwell Colonna-Dashwood. He is challenging the stigma of the coffee pod by putting Panama Geisha from Morgan's Estate into a capsule format. This isn't your standard grocery store espresso. It sits in a unique space between a traditional espresso and a clean filter coffee. The goal is accessibility without sacrificing the complex floral and tea-like notes that make Geisha world-renowned. It proves that even the most elite beans can find a home in modern convenience formats when handled with precision. Liquid Innovation and the Final Sip As we wound through the festival floors, the experimentation didn't stop at capsules. We sampled Nitro cold brews, experiencing how nitrogen infusion alters the mouthfeel and perceived sweetness of the roast. From the workshop booths to the competitive stages, the day served as a reminder that coffee is a living culture. Whether it is a high-pressure espresso or a nitro-chilled glass, the focus remains on the integrity of the ingredient and the joy of the craft.
Apr 10, 2016