Your daily coffee is over 90% water, and tap water could be ruining your best beans — experts explain how to choose the right filter to unlock the full flavor
Coffee is composed of more than 90% water, and the quality of that water significantly influences flavor. Tap water often contains chlorine, varying mineral levels, and differing pH, which can introduce bitter or medicinal notes and affect extraction efficiency. Experts advise using a proper water filter to improve taste and protect coffee equipment.
- ▪Residual chlorine in tap water can react with coffee compounds, producing unpleasant bitter or chemical flavors.
- ▪Mineral composition and pH of water affect extraction efficiency and the balance of flavors in the final cup.
- ▪Seasonal changes in municipal water sources can cause the same beans to taste different over time.
- ▪Using unfiltered water may lead to scale buildup and damage coffee machines, potentially voiding warranties.
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| Original publisher | TechRadar |
| Canonical URL | https://www.techradar.com/home/coffee-machines/your-daily-coffee-is-over-90-percent-water-and-tap-water-could-be-ruining-your-best-beans-experts-explain-how-to-choose-the-right-filter-to-unlock-the-full-flavor |
| Publication time | Sun, 02 Aug 2026 07:00:00 +0000 |
| Retrieval time | 2026-08-02T07:05:40.313Z |
| Last seen | 2026-08-02T07:05:40.313Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | 24BvLwyYS7qq · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Home Small Appliances Coffee Machines Your daily coffee is over 90% water, and tap water could be ruining your best beans — experts explain how to choose the right filter to unlock the full flavor Features By Cat Ellis Published 2 August 2026 Water for coffee is 'a real science' When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. (Image credit: Future) Copy link Facebook X Whatsapp Reddit Pinterest Flipboard Threads Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter If you love coffee, you’ll be very aware of the impact of factors like grind size, water temperature, and infusion time, but there’s something else that’s often overlooked.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at TechRadar.
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