Water hardness in Zhutian
221 mg/L very hard
Tap water in Zhutian is very hard: 221 mg/L (12.9 gpg · 12.4 °dH · 22.1 °fH).
Source: Taiwan Water Corporation open data (2026) · data checked 2026-10-20
Zhutian in Pingtung County is supplied by Taiwan Water Corporation, which reports 221 mg/L as CaCO3 for the town in its 2026 open data. That puts it in the very hard band. Expect limescale on kettles, shower screens and water heaters. The source file does not name the source water for this town, so this note does not either.
Taiwan Water Corporation reports total hardness in mg/L CaCO₃; the drinking-water standard is 300 mg/L.
Water data
| Total hardness | 221 mg/L |
|---|---|
| Utility | Taiwan Water Corporation |
How Zhutian compares
- Tap water in Zhutian is 75 % harder than the median of the 265 cities we track in Taiwan (126 mg/L).
- By hardness it ranks 16 of 265 in Taiwan (1 = hardest); 94 % of these cities have softer water.
- In Pingtung County it is number 6 of 27 cities; the regional median is 155 mg/L.
- Nearest city with clearly softer water: Wanluan, 3 km away (115 mg/L).
- Nearest city with clearly harder water: Qishan, 35 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 Zhutian
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 12 °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 Zhutian water hard or soft?
It is very hard: 221 mg/L as CaCO₃ (12.9 gpg, 12.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Zhutian 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 Zhutian water?
12.9 gpg, equal to 12.4 °dH, 22.1 °fH or 221 mg/L calcium carbonate.
What dishwasher salt setting should I use in Zhutian?
For 221 mg/L (12.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Zhutian?
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