Water hardness in Rankweil
8 °dH hard
Tap water in Rankweil is hard: 8 °dH (143 mg/L · 8.3 gpg · 14.3 °fH).
Source: Wasserwerk Rankweil - Wasser / Wasserhärte (HTML, per source) (2026) · data checked 2026-10-22
Most of Rankweil's water, about 90 percent, comes from the Hochwuhr source, which the waterworks gives as roughly 8 °dH (142.8 mg/L CaCO₃). Two wells, Tillis and Im Schlatt, are listed at roughly 16 and 17 °dH, but they supply a small share, so they are not included in the figure. The page is undated and its values are approximate.
Angabe in °dH; Härtebereiche wie in Deutschland üblich.
Water data
| Total hardness | 8 °dH |
|---|---|
| Utility | Wassergenossenschaft Rankweil / Gemeinde Rankweil Wasserwerk |
How Rankweil compares
- Tap water in Rankweil is 43 % softer than the median of the 159 cities we track in Austria (14 °dH).
- By hardness it ranks 153 of 159 in Austria (1 = hardest); 4 % of these cities have softer water.
- In Vorarlberg it is number 7 of 7 cities; the regional median is 13.4 °dH.
- Nearest city with clearly harder water: Feldkirch, 5 km away (15.6 °dH).
Ranking of the hardest and softest water in Austria →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Rankweil
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 8 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S1 |
| 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 Rankweil water hard or soft?
It is hard: 143 mg/L as CaCO₃ (8.3 gpg, 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 Rankweil safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Angabe in °dH; Härtebereiche wie in Deutschland üblich.
How many grains per gallon is Rankweil water?
8.3 gpg, equal to 8 °dH, 14.3 °fH or 143 mg/L calcium carbonate.
What dishwasher salt setting should I use in Rankweil?
For 143 mg/L (8 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Rankweil?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: Wasserwerk Rankweil - Wasser / Wasserhärte (HTML, per source) (2026). Method: figure published by the water supplier. Wasserwerk Rankweil - Wasser / Wasserhärte (HTML, per source) · Outdated figure? Tell us