Water hardness in Dachau
10.7 °dH very hard
Tap water in Dachau is very hard: 10.7 °dH (190 mg/L · 11.1 gpg · 19 °fH).
Source: Stadtwerke Dachau - Trinkwasseranalyse 2025 (AGROLAB lab report) (2025) · data checked 2026-10-23
Stadtwerke Dachau publishes an AGROLAB lab report for 2025, and the hardness in it is 190.2 mg/L CaCO₃, which falls in the very hard class. We have one figure for the town and no zone split. Expect limescale on kettles and shower screens.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 10.7 °dH |
|---|---|
| Utility | Stadtwerke Dachau |
How Dachau compares
- Tap water in Dachau is 7 % softer than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 456 of 809 in Germany (1 = hardest); 43 % of these cities have softer water.
- In Bayern it is number 106 of 137 cities; the regional median is 15.8 °dH.
- Nearest city with clearly softer water: Karlsfeld, 5 km away (2.6 °dH).
- Nearest city with clearly harder water: Germering, 15 km away (19.8 °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 Dachau
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 11 °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 Dachau water hard or soft?
It is very hard: 190 mg/L as CaCO₃ (11.1 gpg, 10.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Dachau 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 Dachau water?
11.1 gpg, equal to 10.7 °dH, 19 °fH or 190 mg/L calcium carbonate.
What dishwasher salt setting should I use in Dachau?
For 190 mg/L (10.7 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Dachau?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadtwerke Dachau - Trinkwasseranalyse 2025 (AGROLAB lab report) (2025). Method: figure published by the water supplier. Stadtwerke Dachau - Trinkwasseranalyse 2025 (AGROLAB lab report) · Outdated figure? Tell us