Water hardness in Zhonghe
27 mg/L soft
Tap water in Zhonghe is soft: 27 mg/L (1.6 gpg · 1.5 °dH · 2.7 °fH).
Source: Taipei Water Department open data (2026) · data checked 2026-10-20
The three main plants give a median of 27.4 mg/L CaCO₃. These districts are served by the Taipei Water Department, which treats Xindian River water fed by Feitsui Reservoir. At this level scale builds up slowly, so kettles and heating elements stay fairly clean and a softener is rarely needed.
Taiwan Water Corporation reports total hardness in mg/L CaCO₃; the drinking-water standard is 300 mg/L.
Water data
| Total hardness | 27 mg/L |
|---|---|
| Utility | Taipei Water Department |
How Zhonghe compares
- Tap water in Zhonghe is 78 % softer than the median of the 265 cities we track in Taiwan (126 mg/L).
- By hardness it ranks 255 of 265 in Taiwan (1 = hardest); 3 % of these cities have softer water.
- In New Taipei it is number 20 of 29 cities; the regional median is 36 mg/L.
- Nearest city with clearly harder water: Banqiao, 4 km away (73 mg/L).
Ranking of the hardest and softest water in Taiwan →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Zhonghe
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 2 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Zhonghe water hard or soft?
It is soft: 27 mg/L as CaCO₃ (1.6 gpg, 1.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Zhonghe safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Taiwan Water Corporation reports total hardness in mg/L CaCO₃; the drinking-water standard is 300 mg/L.
How many grains per gallon is Zhonghe water?
1.6 gpg, equal to 1.5 °dH, 2.7 °fH or 27 mg/L calcium carbonate.
What dishwasher salt setting should I use in Zhonghe?
For 27 mg/L (1.5 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Zhonghe?
No. With soft water a softener adds nothing.
Source
Source: Taipei Water Department open data (2026). Method: figure published by the water supplier. Taipei Water Department open data · Outdated figure? Tell us