Water hardness in Lübbenau/Spreewald
25 °dH very hard
Tap water in Lübbenau/Spreewald is very hard: 25 °dH (446 mg/L · 26.1 gpg · 44.6 °fH).
Source: WAC Calau - Wasserwerk Lübbenau Trinkwasserparameter, Mittelwert 2025 (2025) · data checked 2026-11-03
The WAC Calau publishes a 2025 mean for the Lübbenau waterworks of 446.3 mg/L CaCO₃, about 25 °dH, and the report lists it as hard. The value is internally consistent with the mmol/L figure in the same table. It applies to the Lübbenau city network, so outlying villages served from elsewhere may differ.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 25 °dH |
|---|---|
| Utility | Wasser- und Abwasserzweckverband Calau (WAC) |
How Lübbenau/Spreewald compares
- Tap water in Lübbenau/Spreewald is 117 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 16 of 809 in Germany (1 = hardest); 98 % of these cities have softer water.
- In Brandenburg it is number 1 of 15 cities; the regional median is 16 °dH.
- Nearest city with clearly softer water: Peitz, 30 km away (15.3 °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 Lübbenau/Spreewald
| Brand | Setting for this water |
|---|---|
| Bosch | H06 |
| Miele | 25 °dH |
| AEG / Electrolux | 6 |
| Beko | 6th |
| Hoover | S3 |
| LG | H4 |
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 Lübbenau/Spreewald water hard or soft?
It is very hard: 446 mg/L as CaCO₃ (26.1 gpg, 25 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Lübbenau/Spreewald 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 Lübbenau/Spreewald water?
26.1 gpg, equal to 25 °dH, 44.6 °fH or 446 mg/L calcium carbonate.
What dishwasher salt setting should I use in Lübbenau/Spreewald?
For 446 mg/L (25 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Lübbenau/Spreewald?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: WAC Calau - Wasserwerk Lübbenau Trinkwasserparameter, Mittelwert 2025 (2025). Method: figure published by the water supplier. WAC Calau - Wasserwerk Lübbenau Trinkwasserparameter, Mittelwert 2025 · Outdated figure? Tell us