Water hardness in Zhutang
203 mg/L very hard
Tap water in Zhutang is very hard: 203 mg/L (11.9 gpg · 11.4 °dH · 20.3 °fH).
Source: Taiwan Water Corporation open data (2026) · data checked 2026-10-20
Zhutang in Changhua County is reported at 203 mg/L as CaCO3 in Taiwan Water Corporation's 2026 open data, which is very hard. Water at this level leaves visible scale on heating elements and fixtures. The data does not describe where the town's water comes from, so we do not say.
Taiwan Water Corporation reports total hardness in mg/L CaCO₃; the drinking-water standard is 300 mg/L.
Water data
| Total hardness | 203 mg/L |
|---|---|
| Utility | Taiwan Water Corporation |
How Zhutang compares
- Tap water in Zhutang is 61 % harder than the median of the 265 cities we track in Taiwan (126 mg/L).
- By hardness it ranks 32 of 265 in Taiwan (1 = hardest); 88 % of these cities have softer water.
- In Changhua County it is number 8 of 23 cities; the regional median is 184 mg/L.
- Nearest city with clearly softer water: Tianzhong, 16 km away (143 mg/L).
- Nearest city with clearly harder water: Neimen, 103 km away (293 mg/L).
Ranking of the hardest and softest water in Taiwan →
What it means at home
- Severe scale: heater elements and washing-machine heaters fail early.
- Detergent use is very high; taps and screens coat within days.
- Dishwasher at maximum salt setting.
- An ion-exchange softener is practically essential; RO for drinking water.
How much salt will you use for softening?
Yes. At this hardness a softener pays for itself through appliance life and detergent.
Descale a coffee machine or kettle about every 1 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Zhutang
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 11 °dH |
| AEG / Electrolux | 3 |
| Beko | 3rd |
| Hoover | S2 |
| LG | H2 |
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 Zhutang water hard or soft?
It is very hard: 203 mg/L as CaCO₃ (11.9 gpg, 11.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Zhutang 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 Zhutang water?
11.9 gpg, equal to 11.4 °dH, 20.3 °fH or 203 mg/L calcium carbonate.
What dishwasher salt setting should I use in Zhutang?
For 203 mg/L (11.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Zhutang?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Taiwan Water Corporation open data (2026). Method: figure published by the water supplier. Taiwan Water Corporation open data · Outdated figure? Tell us