Water hardness in Nußloch
31.6 °dH very hard
Tap water in Nußloch is very hard: 31.6 °dH (564 mg/L · 32.9 gpg · 56.4 °fH).
Source: Gemeinde Nußloch, Trinkwasseruntersuchung Wasserwerk Gruppe B (Limbach Analytics, Prüfbericht 11.09.2025) (2025-08) · data checked 2026-11-03
The figure of 31.6 °dH (5.64 mmol/l, about 564 mg/L CaCO₃) comes from a laboratory report dated 11 September 2025, sample taken on 11 August 2025. It was drawn at the waterworks where water enters the network, not at a household tap. The value is very high, but an earlier report from 2021 gave a similar 32.5 °dH, and the report classes the water as hard.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 31.6 °dH |
|---|---|
| Utility | Gemeinde Nußloch (Wasserversorgung) |
How Nußloch compares
- Tap water in Nußloch is 175 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 3 of 809 in Germany (1 = hardest); 100 % of these cities have softer water.
- In Baden-Württemberg it is number 1 of 146 cities; the regional median is 12.8 °dH.
- Nearest city with clearly softer water: Wiesloch, 1 km away (22.3 °dH).
- Nearest city with clearly harder water: Würzburg, 105 km away (40.4 °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 Nußloch
| Brand | Setting for this water |
|---|---|
| Bosch | H07 |
| Miele | 32 °dH |
| AEG / Electrolux | 7 |
| Beko | 6th |
| Hoover | S4 |
| 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 Nußloch water hard or soft?
It is very hard: 564 mg/L as CaCO₃ (32.9 gpg, 31.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Nußloch 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 Nußloch water?
32.9 gpg, equal to 31.6 °dH, 56.4 °fH or 564 mg/L calcium carbonate.
What dishwasher salt setting should I use in Nußloch?
For 564 mg/L (31.6 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Nußloch?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Gemeinde Nußloch, Trinkwasseruntersuchung Wasserwerk Gruppe B (Limbach Analytics, Prüfbericht 11.09.2025) (2025-08). Method: computed from supplier's calcium and magnesium. Gemeinde Nußloch, Trinkwasseruntersuchung Wasserwerk Gruppe B (Limbach Analytics, Prüfbericht 11.09.2025) · Outdated figure? Tell us