Water hardness in Nanzhou
93 mg/L moderately hard
Tap water in Nanzhou is moderately hard: 93 mg/L (5.5 gpg · 5.2 °dH · 9.3 °fH).
Source: Taiwan Water Corporation open data (2026) · data checked 2026-10-20
Nanzhou, in Pingtung County, is supplied by Taiwan Water Corporation, which reports a hardness of 93.4 mg/L as CaCO3 for 2026. That is in the moderate band, softer than neighbouring Xinpi at 128 mg/L. The dataset does not state which source or plant serves Nanzhou, so we leave the origin of the water unstated. Scale builds up slowly at this level, mostly inside kettles and water heaters.
Taiwan Water Corporation reports total hardness in mg/L CaCO₃; the drinking-water standard is 300 mg/L.
Water data
| Total hardness | 93 mg/L |
|---|---|
| Utility | Taiwan Water Corporation |
How Nanzhou compares
- Tap water in Nanzhou is 26 % softer than the median of the 265 cities we track in Taiwan (126 mg/L).
- By hardness it ranks 193 of 265 in Taiwan (1 = hardest); 24 % of these cities have softer water.
- In Pingtung County it is number 19 of 27 cities; the regional median is 155 mg/L.
- Nearest city with clearly softer water: Alishan, 118 km away (49 mg/L).
- Nearest city with clearly harder water: Xinpi, 5 km away (128 mg/L).
Ranking of the hardest and softest water in Taiwan →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Nanzhou
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 5 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Nanzhou water hard or soft?
It is moderately hard: 93 mg/L as CaCO₃ (5.5 gpg, 5.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Nanzhou 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 Nanzhou water?
5.5 gpg, equal to 5.2 °dH, 9.3 °fH or 93 mg/L calcium carbonate.
What dishwasher salt setting should I use in Nanzhou?
For 93 mg/L (5.2 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Nanzhou?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Taiwan Water Corporation open data (2026). Method: figure published by the water supplier. Taiwan Water Corporation open data · Outdated figure? Tell us