Water hardness in Trendelburg
4.3 °dH moderately hard
Tap water in Trendelburg is moderately hard: 4.3 °dH (77 mg/L · 4.5 gpg · 7.7 °fH).
Source: Stadt Trendelburg, Verbraucherinformation 2025 nach § 45 TrinkwV (Wasseranalyse 2025), PDF hosted on borgentreich.de (2025) · data checked 2026-11-06
In its 2025 consumer information under § 45 TrinkwV, the town of Trendelburg reports a total hardness of 76.8 mg/L CaCO₃. The figure refers to the supply via the Friedrichsfeld reservoir. We have no range across several zones.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 4.3 °dH |
|---|---|
| Utility | Stadt Trendelburg (Versorgung ueber Hochbehaelter Friedrichsfeld) |
How Trendelburg compares
- Tap water in Trendelburg is 63 % softer than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 760 of 809 in Germany (1 = hardest); 6 % of these cities have softer water.
- In Hessen it is number 70 of 73 cities; the regional median is 10.7 °dH.
- Nearest city with clearly softer water: Hofgeismar, 10 km away (3.1 °dH).
- Nearest city with clearly harder water: Beverungen, 27 km away (19.1 °dH).
Ranking of the hardest and softest water in Germany →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Trendelburg
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 4 °dH |
| AEG / Electrolux | 2 |
| Beko | 1st |
| Hoover | S1 |
| LG | H1 |
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 Trendelburg water hard or soft?
It is moderately hard: 77 mg/L as CaCO₃ (4.5 gpg, 4.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Trendelburg 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 Trendelburg water?
4.5 gpg, equal to 4.3 °dH, 7.7 °fH or 77 mg/L calcium carbonate.
What dishwasher salt setting should I use in Trendelburg?
For 77 mg/L (4.3 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Trendelburg?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Stadt Trendelburg, Verbraucherinformation 2025 nach § 45 TrinkwV (Wasseranalyse 2025), PDF hosted on borgentreich.de (2025). Method: figure published by the water supplier. Stadt Trendelburg, Verbraucherinformation 2025 nach § 45 TrinkwV (Wasseranalyse 2025), PDF hosted on borgentreich.de · Outdated figure? Tell us