Water hardness in Bendorf
17 °dH very hard
Tap water in Bendorf is very hard: 17 °dH (304 mg/L · 17.7 gpg · 30.4 °fH).
Source: Stadt Bendorf - Prüfbericht Trinkwasser, Probenahme 18.09.2024 (HB Großbachtal) (2024-09) · data checked 2026-11-03
The figure of 303.5 mg/L CaCO₃ comes from a single sample taken on 18 September 2024 at the Großbachtal tank and published by the town. One sample does not show seasonal swings, and we found no multi-zone breakdown. Treat the value as a good indication of very hard water and ask the Stadtwerke for a current analysis if the exact number matters.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 17 °dH |
|---|---|
| Utility | Stadtwerke Bendorf (Stadt Bendorf, Eigenbetrieb) |
How Bendorf compares
- Tap water in Bendorf is 48 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 186 of 809 in Germany (1 = hardest); 77 % of these cities have softer water.
- In Rheinland-Pfalz it is number 3 of 25 cities; the regional median is 9.9 °dH.
- Nearest city with clearly softer water: Ransbach-Baumbach, 17 km away (4.3 °dH).
- Nearest city with clearly harder water: Limburg an der Lahn, 42 km away (23.3 °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 Bendorf
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 17 °dH |
| AEG / Electrolux | 4 |
| Beko | 5th |
| Hoover | S3 |
| 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 Bendorf water hard or soft?
It is very hard: 304 mg/L as CaCO₃ (17.7 gpg, 17 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Bendorf 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 Bendorf water?
17.7 gpg, equal to 17 °dH, 30.4 °fH or 304 mg/L calcium carbonate.
What dishwasher salt setting should I use in Bendorf?
For 304 mg/L (17 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Bendorf?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadt Bendorf - Prüfbericht Trinkwasser, Probenahme 18.09.2024 (HB Großbachtal) (2024-09). Method: own measurement. Stadt Bendorf - Prüfbericht Trinkwasser, Probenahme 18.09.2024 (HB Großbachtal) · Outdated figure? Tell us