Water hardness in Gerbrunn
38.6 °dH very hard
Tap water in Gerbrunn is very hard: 38.6 °dH (689 mg/L · 40.2 gpg · 68.9 °fH).
Source: Stadtwerke Würzburg AG (WVV) Analysewerte Hochbehälter Galgenberg (Gemeinde Gerbrunn supply) (2024) · data checked 2026-11-05
Gerbrunn is supplied from the Galgenberg service reservoir of Stadtwerke Würzburg (WVV). The 2024 analysis values published for it are 689 mg/L CaCO₃, far above most other places in this dataset. That makes it an outlier, so check the figure with the utility before sizing a softener or descaler.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 38.6 °dH |
|---|---|
| Utility | Stadtwerke Würzburg AG (WVV), Hochbehälter Galgenberg |
How Gerbrunn compares
- Tap water in Gerbrunn is 236 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 2 of 809 in Germany (1 = hardest); 100 % of these cities have softer water.
- In Bayern it is number 2 of 137 cities; the regional median is 15.8 °dH.
- Nearest city with clearly softer water: Rimpar, 7 km away (23.7 °dH).
Ranking of the hardest and softest water in Germany →
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 Gerbrunn
| Brand | Setting for this water |
|---|---|
| Bosch | H07 |
| Miele | 39 °dH |
| AEG / Electrolux | 8 |
| Beko | 6th |
| Hoover | S5 |
| LG | H4 |
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 Gerbrunn water hard or soft?
It is very hard: 689 mg/L as CaCO₃ (40.2 gpg, 38.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Gerbrunn safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
How many grains per gallon is Gerbrunn water?
40.2 gpg, equal to 38.6 °dH, 68.9 °fH or 689 mg/L calcium carbonate.
What dishwasher salt setting should I use in Gerbrunn?
For 689 mg/L (38.6 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Gerbrunn?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadtwerke Würzburg AG (WVV) Analysewerte Hochbehälter Galgenberg (Gemeinde Gerbrunn supply) (2024). Method: figure published by the water supplier. Stadtwerke Würzburg AG (WVV) Analysewerte Hochbehälter Galgenberg (Gemeinde Gerbrunn supply) · Outdated figure? Tell us