Water hardness in Neumünster
12.3 °dH very hard
Tap water in Neumünster is very hard: 12.3 °dH (220 mg/L · 12.9 gpg · 22 °fH).
Source: SWN Stadtwerke Neumünster, Trinkwasserqualität (Beispiele aus Mai 2026, Trinkwasser_Laborbericht_2026.pdf) (2026-05) · data checked 2026-10-20
SWN Stadtwerke Neumünster shows 220.2 mg/L CaCO₃ on its water page, in the medium category. The utility labels these as example values from May 2026 for the city and surrounding area, not as an annual mean, and gives no zone split. Treat the figure as indicative and compare it with the latest laboratory report on the SWN site.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 12.3 °dH |
|---|---|
| Utility | SWN Stadtwerke Neumünster |
How Neumünster compares
- Tap water in Neumünster is 7 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 372 of 809 in Germany (1 = hardest); 54 % of these cities have softer water.
- In Schleswig-Holstein it is number 12 of 26 cities; the regional median is 12 °dH.
- Nearest city with clearly softer water: Nortorf, 14 km away (8.7 °dH).
- Nearest city with clearly harder water: Kiel, 29 km away (16.9 °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 Neumünster
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 12 °dH |
| AEG / Electrolux | 3 |
| Beko | 3rd |
| Hoover | S2 |
| 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 Neumünster water hard or soft?
It is very hard: 220 mg/L as CaCO₃ (12.9 gpg, 12.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Neumünster 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 Neumünster water?
12.9 gpg, equal to 12.3 °dH, 22 °fH or 220 mg/L calcium carbonate.
What dishwasher salt setting should I use in Neumünster?
For 220 mg/L (12.3 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Neumünster?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: SWN Stadtwerke Neumünster, Trinkwasserqualität (Beispiele aus Mai 2026, Trinkwasser_Laborbericht_2026.pdf) (2026-05). Method: figure published by the water supplier. SWN Stadtwerke Neumünster, Trinkwasserqualität (Beispiele aus Mai 2026, Trinkwasser_Laborbericht_2026.pdf) · Outdated figure? Tell us