Water hardness in Oberursel (Taunus)
5.2 °dH moderately hard
Tap water in Oberursel (Taunus) is moderately hard: 5.2 °dH (93 mg/L · 5.5 gpg · 9.3 °fH).
Source: Stadtwerke Oberursel Trinkwasseranalyse (Oberstedten) (2026) · data checked 2026-10-22
Range across supply zones: 66–121 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| Kernstadt Oberstedten incl. Bommersheim | 3.7 | 66 | moderately hard |
| Weisskirchen and Reststierstadt (Riedwiese works) | 6.8 | 121 | hard |
The 93.4 mg/L CaCO₃ figure comes from a 2026 measurement by Stadtwerke Oberursel in Oberstedten. The city has two zones with values from 65.9 to 121.0 mg/L. Bad Homburg (189.2 mg/L) and Frankfurt am Main (217.8 mg/L) are clearly harder. The measurement is from one sampling point, so check your own district.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 5.2 °dH |
|---|---|
| Utility | Stadtwerke Oberursel Taunus GmbH |
How Oberursel (Taunus) compares
- Tap water in Oberursel (Taunus) is 55 % softer than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 731 of 809 in Germany (1 = hardest); 10 % of these cities have softer water.
- In Hessen it is number 66 of 73 cities; the regional median is 10.7 °dH.
- Nearest city with clearly softer water: Eberbach, 88 km away (2.1 °dH).
- Nearest city with clearly harder water: Bad Homburg vor der Höhe, 5 km away (10.6 °dH).
Ranking of the hardest and softest water in Germany →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Oberursel (Taunus)
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 5 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Oberursel (Taunus) water hard or soft?
It is moderately hard: 93 mg/L as CaCO₃ (5.5 gpg, 5.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Oberursel (Taunus) 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 Oberursel (Taunus) water?
5.5 gpg, equal to 5.2 °dH, 9.3 °fH or 93 mg/L calcium carbonate.
What dishwasher salt setting should I use in Oberursel (Taunus)?
For 93 mg/L (5.2 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Oberursel (Taunus)?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Stadtwerke Oberursel Trinkwasseranalyse (Oberstedten) (2026). Method: own measurement. Stadtwerke Oberursel Trinkwasseranalyse (Oberstedten) · Outdated figure? Tell us