Water hardness in Aschaffenburg
12.4 °dH very hard
Tap water in Aschaffenburg is very hard: 12.4 °dH (221 mg/L · 12.9 gpg · 22.1 °fH).
Source: Aschaffenburger Versorgungs-GmbH, Trinkwasseranalyse (Stand 2026) (2026) · data checked 2026-10-20
Aschaffenburger Versorgungs-GmbH gives a network mean of 221.3 mg/L CaCO₃ in its 2026 analysis, in the medium category. The PDF shows no sampling date. It also prints hardness in mmol/L, which converts to a slightly higher figure, so treat our number as accurate to within roughly 8 %.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 12.4 °dH |
|---|---|
| Utility | Aschaffenburger Versorgungs-GmbH (AVG, stwab) |
How Aschaffenburg compares
- Tap water in Aschaffenburg is 8 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 369 of 809 in Germany (1 = hardest); 54 % of these cities have softer water.
- In Bayern it is number 94 of 137 cities; the regional median is 15.8 °dH.
- Nearest city with clearly softer water: Elsenfeld, 2 km away (6.9 °dH).
- Nearest city with clearly harder water: Hanau, 24 km away (15.9 °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 Aschaffenburg
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 12 °dH |
| AEG / Electrolux | 3 |
| 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 Aschaffenburg water hard or soft?
It is very hard: 221 mg/L as CaCO₃ (12.9 gpg, 12.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Aschaffenburg 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 Aschaffenburg water?
12.9 gpg, equal to 12.4 °dH, 22.1 °fH or 221 mg/L calcium carbonate.
What dishwasher salt setting should I use in Aschaffenburg?
For 221 mg/L (12.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Aschaffenburg?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Aschaffenburger Versorgungs-GmbH, Trinkwasseranalyse (Stand 2026) (2026). Method: figure published by the water supplier. Aschaffenburger Versorgungs-GmbH, Trinkwasseranalyse (Stand 2026) · Outdated figure? Tell us