Water hardness in Oberasbach
15.4 °dH very hard
Tap water in Oberasbach is very hard: 15.4 °dH (275 mg/L · 16.1 gpg · 27.5 °fH).
Source: Stadt Oberasbach, Bekanntgabe der Wasserhärte (WRMG §9) (2026-09) · data checked 2026-11-03
Range across supply zones: 254–296 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| Dillenberggruppe supply (rest of city) | 14.2 | 254 | very hard |
| Infra Fürth supply | 16.6 | 296 | very hard |
Under the German water hardness law (WRMG §9) the city publishes two supply areas, 253.5 mg/L for the Dillenberggruppe supply and 296.3 mg/L for the infra fürth supply. The headline figure of 274.9 mg/L CaCO₃ sits between the two, so very hard water is the rule across the city. Your own address decides which value applies, and a descaler for kettle and coffee machine is a routine purchase.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 15.4 °dH |
|---|---|
| Utility | infra fürth gmbh |
How Oberasbach compares
- Tap water in Oberasbach is 34 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 246 of 809 in Germany (1 = hardest); 70 % of these cities have softer water.
- In Bayern it is number 74 of 137 cities; the regional median is 15.8 °dH.
- Nearest city with clearly softer water: Nuremberg, 7 km away (12.1 °dH).
- Nearest city with clearly harder water: Langenzenn, 17 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 Oberasbach
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 15 °dH |
| AEG / Electrolux | 4 |
| Beko | 4th |
| 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 Oberasbach water hard or soft?
It is very hard: 275 mg/L as CaCO₃ (16.1 gpg, 15.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Oberasbach 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 Oberasbach water?
16.1 gpg, equal to 15.4 °dH, 27.5 °fH or 275 mg/L calcium carbonate.
What dishwasher salt setting should I use in Oberasbach?
For 275 mg/L (15.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Oberasbach?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadt Oberasbach, Bekanntgabe der Wasserhärte (WRMG §9) (2026-09). Method: figure published by the water supplier. Stadt Oberasbach, Bekanntgabe der Wasserhärte (WRMG §9) · Outdated figure? Tell us