Water hardness in Walluf
18.3 °dH very hard
Tap water in Walluf is very hard: 18.3 °dH (327 mg/L · 19.1 gpg · 32.7 °fH).
Source: Rheingauwasser GmbH, Trinkwasseruntersuchungen Ortsnetze, Analyse Stand 2024 (hosted by Gemeinde Walluf) (2024) · data checked 2026-11-06
Range across supply zones: 321–334 mg/L.
4 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| Niederwalluf Gewerbegebiet/Kressboden | 18.5 | 330 | very hard |
| Niederwalluf oberhalb Bahnlinie | 18.1 | 323 | very hard |
| Niederwalluf unterhalb Bahnlinie | 18 | 321 | very hard |
| Oberwalluf | 18.7 | 334 | very hard |
Rheingauwasser GmbH (Eltville) publishes drinking-water analyses for the Niederwalluf and Oberwalluf local networks, and the 2024 analysis is hosted by the municipality. There are four supply zones with values from 321.3 to 333.8 mg/L CaCO₃, and the figure used here is 326.7 mg/L (very hard). For an exact value, check the analysis for your own local network.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 18.3 °dH |
|---|---|
| Utility | Rheingauwasser GmbH (Eltville), Ortsnetze Niederwalluf and Oberwalluf |
How Walluf compares
- Tap water in Walluf is 59 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 135 of 809 in Germany (1 = hardest); 83 % of these cities have softer water.
- In Hessen it is number 14 of 73 cities; the regional median is 10.7 °dH.
- Nearest city with clearly softer water: Taunusstein, 12 km away (10.3 °dH).
- Nearest city with clearly harder water: Limburg an der Lahn, 39 km away (23.3 °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 Walluf
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 18 °dH |
| AEG / Electrolux | 4 |
| Beko | 5th |
| Hoover | S3 |
| 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 Walluf water hard or soft?
It is very hard: 327 mg/L as CaCO₃ (19.1 gpg, 18.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Walluf 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 Walluf water?
19.1 gpg, equal to 18.3 °dH, 32.7 °fH or 327 mg/L calcium carbonate.
What dishwasher salt setting should I use in Walluf?
For 327 mg/L (18.3 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Walluf?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Rheingauwasser GmbH, Trinkwasseruntersuchungen Ortsnetze, Analyse Stand 2024 (hosted by Gemeinde Walluf) (2024). Method: figure published by the water supplier. Rheingauwasser GmbH, Trinkwasseruntersuchungen Ortsnetze, Analyse Stand 2024 (hosted by Gemeinde Walluf) · Outdated figure? Tell us