Water hardness in Imst
10.2 °dH very hard
Tap water in Imst is very hard: 10.2 °dH (182 mg/L · 10.6 gpg · 18.2 °fH).
Source: Stadtwerke Imst, Wasserwerte (refers to Endbericht 2025) (2025) · data checked 2026-10-22
Range across supply zones: 137–196 mg/L.
5 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| Gunglgrün | 10.5 | 187 | very hard |
| Hauptnetz | 9.4 | 167 | hard |
| Hoch Imst | 10.4 | 186 | very hard |
| Ober-/Unterstadt Industriezone | 9.6 | 171 | hard |
| Sonnberg | 10.2 | 182 | very hard |
Stadtwerke Imst publishes a range for its main network and separate values for several other supply zones. Together they give a median of 182.1 mg/L CaCO₃, with a spread from 137.4 to 196.4 mg/L. The page refers to the 2025 final report but prints no date for the zone values. Ask the utility which zone your address belongs to.
Angabe in °dH; Härtebereiche wie in Deutschland üblich.
Water data
| Total hardness | 10.2 °dH |
|---|---|
| Utility | Stadtwerke Imst |
How Imst compares
- Tap water in Imst is 27 % softer than the median of the 159 cities we track in Austria (14 °dH).
- By hardness it ranks 143 of 159 in Austria (1 = hardest); 10 % of these cities have softer water.
- In Tirol it is number 2 of 7 cities; the regional median is 9 °dH.
- Nearest city with clearly softer water: Innsbruck, 49 km away (7.8 °dH).
- Nearest city with clearly harder water: Wolfurt, 79 km away (14.3 °dH).
Ranking of the hardest and softest water in Austria →
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 Imst
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 10 °dH |
| AEG / Electrolux | 2 |
| 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 Imst water hard or soft?
It is very hard: 182 mg/L as CaCO₃ (10.6 gpg, 10.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Imst 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 Imst water?
10.6 gpg, equal to 10.2 °dH, 18.2 °fH or 182 mg/L calcium carbonate.
What dishwasher salt setting should I use in Imst?
For 182 mg/L (10.2 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Imst?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadtwerke Imst, Wasserwerte (refers to Endbericht 2025) (2025). Method: figure published by the water supplier. Stadtwerke Imst, Wasserwerte (refers to Endbericht 2025) · Outdated figure? Tell us