Water hardness in Überlingen
9.1 °dH hard
Tap water in Überlingen is hard: 9.1 °dH (162 mg/L · 9.5 gpg · 16.2 °fH).
Source: Bodensee-Wasserversorgung – Trinkwasseranalyse Jahresmittelwerte 2022 (hosted by Stadt Überlingen) (2022) · data checked 2026-11-02
This figure is over 3 years old; hardness may have changed.
The figure of 162.1 mg/L CaCO₃ comes from the 2022 annual mean values hosted by Stadt Überlingen, published through Bodensee-Wasserversorgung. Calcium is 50 mg/L and magnesium 8.6 mg/L. Konstanz (163.7 mg/L) and Friedrichshafen (164.2 mg/L) are almost identical, while Radolfzell, 15 km away, is at 403.4 mg/L. The analysis is from 2022, so check for a newer one.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 9.1 °dH |
|---|---|
| Calcium (mg/L) | 50 |
| Magnesium (mg/L) | 8.6 |
| Utility | Stadtwerk am See / Bodensee-Wasserversorgung |
How Überlingen compares
- Tap water in Überlingen is 21 % softer than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 525 of 809 in Germany (1 = hardest); 35 % of these cities have softer water.
- In Baden-Württemberg it is number 115 of 146 cities; the regional median is 12.8 °dH.
- Nearest city with clearly softer water: Alpirsbach, 86 km away (4.2 °dH).
- Nearest city with clearly harder water: Radolfzell am Bodensee, 15 km away (22.6 °dH).
Ranking of the hardest and softest water in Germany →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Überlingen
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 9 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S1 |
| 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 Überlingen water hard or soft?
It is hard: 162 mg/L as CaCO₃ (9.5 gpg, 9.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Überlingen 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 Überlingen water?
9.5 gpg, equal to 9.1 °dH, 16.2 °fH or 162 mg/L calcium carbonate.
What dishwasher salt setting should I use in Überlingen?
For 162 mg/L (9.1 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Überlingen?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: Bodensee-Wasserversorgung – Trinkwasseranalyse Jahresmittelwerte 2022 (hosted by Stadt Überlingen) (2022). Method: figure published by the water supplier. Bodensee-Wasserversorgung – Trinkwasseranalyse Jahresmittelwerte 2022 (hosted by Stadt Überlingen) · Outdated figure? Tell us