Water hardness in Wandan
215 mg/L very hard
Tap water in Wandan is very hard: 215 mg/L (12.6 gpg · 12 °dH · 21.5 °fH).
Source: Taiwan Water Corporation open data (2026) · data checked 2026-10-20
Wandan is reported by Taiwan Water Corporation at 215.0 mg/L CaCO₃ in 2026 (customer tap water). Pingtung lies in the Gaoping River basin, whose water also supplies Kaohsiung and Tainan; the local raw-water mix is not confirmed here. At this level scale builds up quickly in kettles, heaters and shower heads, so a softener or scale protection is worth considering.
Taiwan Water Corporation reports total hardness in mg/L CaCO₃; the drinking-water standard is 300 mg/L.
Water data
| Total hardness | 215 mg/L |
|---|---|
| Utility | Taiwan Water Corporation |
How Wandan compares
- Tap water in Wandan is 71 % harder than the median of the 265 cities we track in Taiwan (126 mg/L).
- By hardness it ranks 19 of 265 in Taiwan (1 = hardest); 93 % of these cities have softer water.
- In Pingtung County it is number 7 of 27 cities; the regional median is 155 mg/L.
- Nearest city with clearly softer water: Xinyuan, 6 km away (93 mg/L).
- Nearest city with clearly harder water: Yanbu, 21 km away (275 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 Wandan
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| 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 Wandan water hard or soft?
It is very hard: 215 mg/L as CaCO₃ (12.6 gpg, 12 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Wandan 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 Wandan water?
12.6 gpg, equal to 12 °dH, 21.5 °fH or 215 mg/L calcium carbonate.
What dishwasher salt setting should I use in Wandan?
For 215 mg/L (12 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Wandan?
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