Water hardness in Eckernförde
15.6 °dH very hard
Tap water in Eckernförde is very hard: 15.6 °dH (278 mg/L · 16.2 gpg · 27.8 °fH).
Source: Stadtwerke Eckernförde – Trinkwasseranalyse (Wasseruntersuchung 11.03.2026) (2026-03) · data checked 2026-11-02
Range across supply zones: 255–300 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| Wasserwerk Nord | 14.3 | 255 | very hard |
| Wasserwerk Süd | 16.8 | 300 | very hard |
Stadtwerke Eckernförde tested its water on 11 March 2026 and reports 277.6 mg/L CaCO₃, with calcium at 110.0 mg/L. The two waterworks differ a little: Wasserwerk Nord is at 255.3 mg/L and Wasserwerk Süd at 299.9 mg/L. Both are very hard, so descale kettles and washing machines regularly.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 15.6 °dH |
|---|---|
| Calcium (mg/L) | 110 |
| Utility | Stadtwerke Eckernförde GmbH |
How Eckernförde compares
- Tap water in Eckernförde is 35 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 242 of 809 in Germany (1 = hardest); 70 % of these cities have softer water.
- In Schleswig-Holstein it is number 8 of 26 cities; the regional median is 12 °dH.
- Nearest city with clearly softer water: Rendsburg, 21 km away (10.6 °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 Eckernförde
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 16 °dH |
| AEG / Electrolux | 4 |
| Beko | 4th |
| Hoover | S2 |
| 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 Eckernförde water hard or soft?
It is very hard: 278 mg/L as CaCO₃ (16.2 gpg, 15.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Eckernförde 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 Eckernförde water?
16.2 gpg, equal to 15.6 °dH, 27.8 °fH or 278 mg/L calcium carbonate.
What dishwasher salt setting should I use in Eckernförde?
For 278 mg/L (15.6 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Eckernförde?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadtwerke Eckernförde – Trinkwasseranalyse (Wasseruntersuchung 11.03.2026) (2026-03). Method: figure published by the water supplier. Stadtwerke Eckernförde – Trinkwasseranalyse (Wasseruntersuchung 11.03.2026) · Outdated figure? Tell us