極淺焙與手沖咖啡用水指南
Water Guide for Ultra-Light & Pour-Over Coffee
對極淺焙咖啡來說，水質的影響往往比器材更直接。先固定一款合適的水，再調整研磨、溫度與注水，通常更容易找到清晰而穩定的風味。
手沖咖啡用什麼水？
最簡單的答案是：低礦化，但不是零礦物質的水。極淺焙需要足夠的鈣、鎂協助萃取，也需要適量鹼度緩衝酸質；礦物質太高容易讓風味變鈍，接近 0 ppm 的水則可能顯得空、尖銳或缺乏結構。
在台灣，如果想直接開瓶沖，波爾天然水是實用起點。若手邊是 RO、泰山純水、ZeroWater 或 DI 水，建議先加回礦物質，再拿來沖咖啡。
手沖咖啡用水：三段式選擇
Tier 1 — 簡單穩定（不需混水）
- 波爾天然水：總硬度約 50–70 ppm（以 CaCO3 計），是穩定且方便的起點，可直接用於極淺焙手沖。
Tier 2 — 可控與彈性
- 低礦物基礎水 + 礦物質滴劑：使用 RO、純水（例如泰山純水）、ZeroWater 或接近 0 ppm 的 DI 水，再加入 Apax 等咖啡用礦物質滴劑。容易重現，也能依咖啡微調。
Tier 3 — 進階與精準
- 完整 DIY 礦物配方：從低礦物基礎水建立鈣、鎂與緩衝成分的比例。Lightmist 通常從 TDS 約 50–80 ppm 的區間開始，再依杯中表現調整。社群中也會分享實際使用的濃縮比例，Taipei Coffee Group（TCG）成員可取得對應濃縮液作為起點。
咖啡用水的 ppm、TDS、硬度與鹼度
ppm 只是濃度單位，不等於某一種水質指標。看到「60 ppm」時，必須先確認它指的是 TDS、總硬度，還是鹼度；三者不能直接互換。
- TDS（總溶解固體）
- TDS 筆以導電度估算水中溶解物總量，適合追蹤方向與重現配方，但看不出礦物種類或比例。
- 總硬度（GH）
- 主要描述鈣與鎂，通常以 ppm CaCO3 表示。它會影響萃取、口感與風味結構。
- 鹼度（Alkalinity）
- 描述水中和酸的能力，也通常以 ppm CaCO3 表示。鹼度太高容易壓低明亮酸質；太低則可能讓酸感尖銳。
Lightmist 的極淺焙起點
- TDS：約 50–80 ppm
- 總硬度：約 30–60 ppm（以 CaCO3 計）
- 鹼度：約 20–40 ppm（以 CaCO3 計）
這些數字是實用起點，不是唯一答案。同一個 TDS 數字可以由完全不同的礦物比例組成；最終仍要依咖啡、研磨與杯中表現微調。
依杯中表現微調
- 風味平淡、模糊：嘗試降低整體礦物量或鹼度。
- 酸感尖銳、口感空：確認沒有直接使用接近 0 ppm 的水，再小幅增加硬度或緩衝。
- 苦澀、乾燥：先檢查研磨、溫度與接觸時間，不要只靠改水修正萃取問題。
一起討論
用水細節、配方討論與即時問答都在 Discord。
歡迎加入一起交流。
For ultra-light coffee, water quality often has a more direct impact than equipment. Fix the water first, then adjust grind, temperature, and pouring to reach a clear, repeatable cup.
What water should you use for pour-over coffee?
The short answer is soft, low-mineral water, but not zero-mineral water. Ultra-light coffee needs enough calcium and magnesium to support extraction, plus modest alkalinity to buffer acidity. Too much mineral content can mute the cup; near-0 ppm water can taste hollow, sharp, or structurally weak.
Three-Tier Water Ladder
Tier 1 — Simple & Aligned (No Mixing Required)
- 波爾天然水: approximately 50–70 ppm total hardness as CaCO3, making it a stable, convenient ready-to-brew starting point.
Tier 2 — Controlled & Flexible
- Low-mineral base water + mineral drops: use RO, pure water such as 泰山純水, ZeroWater, or near-0 ppm DI water, then add coffee-specific mineral drops such as Apax. This is repeatable and easy to adjust.
Tier 3 — Advanced & Precise
- Full DIY mineral recipe: build calcium, magnesium, and buffer ratios from a low-mineral base. Lightmist generally starts around 50–80 ppm TDS and adjusts from the cup. Within the community, we share concentrate ratios, and TCG members may access matching concentrates as a starting point.
TDS, hardness, alkalinity, and ppm
ppm is a concentration unit, not a specific water parameter. A “60 ppm” reading only makes sense when you know whether it describes TDS, general hardness, or alkalinity.
- TDS (total dissolved solids)
- A TDS meter estimates dissolved material from conductivity. It is useful for tracking direction and reproducing a recipe, but it cannot identify the minerals or their ratios.
- General hardness (GH)
- Mainly calcium and magnesium, commonly reported as ppm CaCO3. It affects extraction, mouthfeel, and structure.
- Alkalinity
- The water's capacity to buffer acids, also commonly reported as ppm CaCO3. Too much can mute bright acidity; too little can make acidity feel sharp.
Lightmist starting points for ultra-light coffee
- TDS: approximately 50–80 ppm
- General hardness: approximately 30–60 ppm as CaCO3
- Alkalinity: approximately 20–40 ppm as CaCO3
These are practical starting points, not universal targets. Two waters with the same TDS can have completely different mineral ratios and brew differently.
常見問題 / Frequently Asked Questions
手沖咖啡用什麼水最好？ / What water is best for pour-over coffee?
沒有一種水適合所有咖啡。對極淺焙手沖，建議先用低礦化、但仍含適量鈣、鎂與緩衝成分的水。若要直接開瓶沖，波爾天然水是台灣容易取得的實用起點；若用 RO、純水或 DI 水，應先加回礦物質。
No single water suits every coffee. For ultra-light pour-over, start with soft, low-mineral water that still contains some calcium, magnesium, and buffering capacity. 波爾天然水 is a practical ready-to-brew option in Taiwan; RO, pure, or DI water should be remineralized first.
RO 水或純水可以直接沖咖啡嗎？ / Can I brew coffee with straight RO or pure water?
不建議直接使用接近 0 ppm 的 RO、DI 或純水。礦物質與緩衝能力不足時，咖啡容易顯得空、尖銳或缺乏結構。把它當作基礎水，再用礦物質滴劑或自配濃縮液調整，會更穩定。
Straight near-0 ppm RO, DI, or pure water is not recommended. With too little hardness and buffering capacity, coffee can taste hollow, sharp, or structurally weak. Use it as base water and remineralize it with drops or a concentrate.
咖啡用水的 TDS 或 ppm 多少合適？ / What TDS or ppm is suitable for coffee water?
Lightmist 的極淺焙 DIY 用水通常從 TDS 約 50–80 ppm 開始；若談的是總硬度，起點約為 30–60 ppm（以 CaCO3 計），鹼度則約為 20–40 ppm（以 CaCO3 計）。ppm 只是單位，必須先確認數字代表 TDS、總硬度還是鹼度。
For ultra-light roasts, Lightmist usually starts around 50–80 ppm TDS. A practical starting point for general hardness is 30–60 ppm as CaCO3, with alkalinity around 20–40 ppm as CaCO3. ppm is only a unit, so always identify whether a number refers to TDS, hardness, or alkalinity.
波爾天然水適合手沖咖啡嗎？ / Is 波爾天然水 suitable for pour-over coffee?
適合。它的總硬度約為 50–70 ppm（以 CaCO3 計），對極淺焙是方便、穩定且不需混水的起點。瓶裝水的礦物組成可能調整，仍建議以當期標示或實測為準。
Yes. Its total hardness is approximately 50–70 ppm as CaCO3, making it a convenient and stable no-mixing starting point for ultra-light coffee. Bottled-water composition can change, so check the current label or measurements.
台灣自來水可以直接沖手沖咖啡嗎？ / Can I brew pour-over coffee with tap water in Taiwan?
可以，但自來水會因地區、建築水塔、管線與濾芯狀態而變化，氯味或偏高鹼度也可能掩蓋細緻風味。若要穩定重現極淺焙，軟質瓶裝水或低礦物基礎水加礦物質通常更容易控制。
You can, but tap water varies with location, building tanks, plumbing, and filter condition. Chlorine or higher alkalinity can also mask delicate flavors. For repeatable ultra-light coffee, soft bottled water or remineralized low-mineral base water is usually easier to control.
TDS、總硬度與鹼度有什麼不同？ / How do TDS, hardness, and alkalinity differ?
TDS 是溶解物總量的估算；總硬度主要描述鈣與鎂；鹼度描述水中和酸的緩衝能力。兩杯水即使都顯示 60 ppm TDS，礦物比例與沖煮表現仍可能完全不同。
TDS estimates the total dissolved material, general hardness mainly describes calcium and magnesium, and alkalinity describes acid-buffering capacity. Two waters can both read 60 ppm TDS yet have very different mineral compositions and brew very differently.
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