Water hardness in Grasbrunn
16.3 °dH very hard
Tap water in Grasbrunn is very hard: 16.3 °dH (290 mg/L · 16.9 gpg · 29 °fH).
Source: Gemeindewerke Grasbrunn: Trinkwasserbeschaffenheit 2026 (2026-08) · data checked 2026-11-06
Range across supply zones: 287–293 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| Brunnen 3 | 16.1 | 287 | very hard |
| Brunnen 4 | 16.4 | 293 | very hard |
Gemeindewerke Grasbrunn (GWG) publishes its 2026 drinking-water report (dated August 2026). The figures cover two wells, at 287.4 and 292.7 mg/L CaCO₃, and the value used here is 290.1 mg/L (very hard). The two wells differ only slightly; the utility can tell you which one serves a given address.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 16.3 °dH |
|---|---|
| Utility | Gemeindewerke Grasbrunn (GWG) |
How Grasbrunn compares
- Tap water in Grasbrunn is 41 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 214 of 809 in Germany (1 = hardest); 74 % of these cities have softer water.
- In Bayern it is number 65 of 137 cities; the regional median is 15.8 °dH.
- Nearest city with clearly softer water: Karlsfeld, 26 km away (2.6 °dH).
- Nearest city with clearly harder water: Tuntenhausen, 27 km away (23.9 °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 Grasbrunn
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 16 °dH |
| AEG / Electrolux | 4 |
| Beko | 5th |
| Hoover | S2 |
| LG | H3 |
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 Grasbrunn water hard or soft?
It is very hard: 290 mg/L as CaCO₃ (16.9 gpg, 16.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Grasbrunn 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 Grasbrunn water?
16.9 gpg, equal to 16.3 °dH, 29 °fH or 290 mg/L calcium carbonate.
What dishwasher salt setting should I use in Grasbrunn?
For 290 mg/L (16.3 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Grasbrunn?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Gemeindewerke Grasbrunn: Trinkwasserbeschaffenheit 2026 (2026-08). Method: figure published by the water supplier. Gemeindewerke Grasbrunn: Trinkwasserbeschaffenheit 2026 · Outdated figure? Tell us