Water hardness in Yongan
210 mg/L very hard
Tap water in Yongan is very hard: 210 mg/L (12.3 gpg · 11.8 °dH · 21 °fH).
Source: Taiwan Water Corporation open data (2026) · data checked 2026-10-20
Yongan, listed under Kaohsiung, is reported at 210 mg/L as CaCO3 in Taiwan Water Corporation's 2026 open data. That is very hard. Expect scale in kettles, water heaters and on taps. The source file does not describe the supply source for the town, so we do not guess.
Taiwan Water Corporation reports total hardness in mg/L CaCO₃; the drinking-water standard is 300 mg/L.
Water data
| Total hardness | 210 mg/L |
|---|---|
| Utility | Taiwan Water Corporation |
How Yongan compares
- Tap water in Yongan is 67 % harder than the median of the 265 cities we track in Taiwan (126 mg/L).
- By hardness it ranks 22 of 265 in Taiwan (1 = hardest); 90 % of these cities have softer water.
- In Kaohsiung it is number 5 of 21 cities; the regional median is 202 mg/L.
- Nearest city with clearly softer water: Rende, 17 km away (143 mg/L).
- Nearest city with clearly harder water: Neimen, 28 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 Yongan
| 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 Yongan water hard or soft?
It is very hard: 210 mg/L as CaCO₃ (12.3 gpg, 11.8 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Yongan 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 Yongan water?
12.3 gpg, equal to 11.8 °dH, 21 °fH or 210 mg/L calcium carbonate.
What dishwasher salt setting should I use in Yongan?
For 210 mg/L (11.8 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Yongan?
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