Water hardness in Tulln an der Donau
9.2 °dH hard
Tap water in Tulln an der Donau is hard: 9.2 °dH (164 mg/L · 9.6 gpg · 16.4 °fH).
Source: Stadt Tulln Trinkwasserbefund (Eurofins inspection report 19.10.2026) (2026-09) · data checked 2026-10-20
Tulln's inspection report from September 2026 contains one readable network result, a school tap in the central network, at 164.2 mg/L CaCO₃. Samples from three outlying districts show no hardness value. The report also lists raw-water and plant-stage samples, which are not the water you drink and are not used. The value is not confirmed for the whole town.
Angabe in °dH; Härtebereiche wie in Deutschland üblich.
Water data
| Total hardness | 9.2 °dH |
|---|---|
| Utility | Stadtgemeinde Tulln (Wasserwerke 1 and 2) |
How Tulln an der Donau compares
- Tap water in Tulln an der Donau is 34 % softer than the median of the 159 cities we track in Austria (14 °dH).
- By hardness it ranks 148 of 159 in Austria (1 = hardest); 7 % of these cities have softer water.
- In Niederösterreich it is number 46 of 46 cities; the regional median is 15.5 °dH.
- Nearest city with clearly softer water: Mürzzuschlag, 85 km away (5.7 °dH).
- Nearest city with clearly harder water: Breitenfurt bei Wien, 23 km away (20 °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 Tulln an der Donau
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 9 °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 Tulln an der Donau water hard or soft?
It is hard: 164 mg/L as CaCO₃ (9.6 gpg, 9.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Tulln an der Donau 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 Tulln an der Donau water?
9.6 gpg, equal to 9.2 °dH, 16.4 °fH or 164 mg/L calcium carbonate.
What dishwasher salt setting should I use in Tulln an der Donau?
For 164 mg/L (9.2 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Tulln an der Donau?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: Stadt Tulln Trinkwasserbefund (Eurofins inspection report 19.10.2026) (2026-09). Method: figure published by the water supplier. Stadt Tulln Trinkwasserbefund (Eurofins inspection report 19.10.2026) · Outdated figure? Tell us