Water hardness in Bad Soden-Salmünster
7 °dH hard
Tap water in Bad Soden-Salmünster is hard: 7 °dH (124 mg/L · 7.2 gpg · 12.4 °fH).
Source: Stadt Bad Soden-Salmünster – Trinkwasseruntersuchungsbericht für die Ortsnetze (aus dem Jahr 2023) (2023) · data checked 2026-11-02
Range across supply zones: 36–191 mg/L.
6 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| Katholisch-Willenroth (Brunnen Willenroth) | 10.4 | 186 | very hard |
| Kerbersdorf (Brunnen Kerbersdorf) | 10.7 | 191 | very hard |
| Mernes (Brunnen Mernes) | 2 | 36 | soft |
| Romsthal, Wahlert, Eckardroth, Bad Soden (WW Huttengrund) | 10.3 | 184 | very hard |
| Salmünster Stadtviertel (Brunnen Borntal) | 3.2 | 57 | soft |
| Salmünster, Hausen, Ahl, Alsberg (Brunnen Wüfelbach) | 3.6 | 64 | moderately hard |
Bad Soden-Salmünster runs separate networks, each fed from its own well or waterworks, so the 2023 report shows six values. They range from 35.7 mg/L CaCO₃ in Mernes to 191.0 mg/L in Kerbersdorf, with the Wüfelbach well serving Salmünster at 64.3 mg/L. The city figure of 124.1 mg/L is a median, so look up your Ortsteil.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 7 °dH |
|---|---|
| Calcium (mg/L) | 47.1 |
| Magnesium (mg/L) | 17.3 |
| hardness_mmol_l | 1.91 |
| Utility | Stadt Bad Soden-Salmünster Stadtwerke |
How Bad Soden-Salmünster compares
- Tap water in Bad Soden-Salmünster is 40 % softer than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 635 of 809 in Germany (1 = hardest); 21 % of these cities have softer water.
- In Hessen it is number 55 of 73 cities; the regional median is 10.7 °dH.
- Nearest city with clearly softer water: Wächtersbach, 6 km away (5.1 °dH).
- Nearest city with clearly harder water: Gelnhausen, 15 km away (9 °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 Bad Soden-Salmünster
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| 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 Bad Soden-Salmünster water hard or soft?
It is hard: 124 mg/L as CaCO₃ (7.2 gpg, 7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Bad Soden-Salmünster 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 Bad Soden-Salmünster water?
7.2 gpg, equal to 7 °dH, 12.4 °fH or 124 mg/L calcium carbonate.
What dishwasher salt setting should I use in Bad Soden-Salmünster?
For 124 mg/L (7 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Bad Soden-Salmünster?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: Stadt Bad Soden-Salmünster – Trinkwasseruntersuchungsbericht für die Ortsnetze (aus dem Jahr 2023) (2023). Method: figure published by the water supplier. Stadt Bad Soden-Salmünster – Trinkwasseruntersuchungsbericht für die Ortsnetze (aus dem Jahr 2023) · Outdated figure? Tell us