Water hardness in Langenzenn
19.8 °dH very hard
Tap water in Langenzenn is very hard: 19.8 °dH (354 mg/L · 20.7 gpg · 35.4 °fH).
Source: Stadtwerke Langenzenn, Trinkwasseranalysen im Stadtgebiet Langenzenn (Stand 08/2026) (2026-08) · data checked 2026-11-03
Range across supply zones: 330–378 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| Stadtgebiet Nord | 18.5 | 330 | very hard |
| Stadtgebiet Süd | 21.2 | 378 | very hard |
Stadtwerke Langenzenn publishes two zones in its 08/2026 analysis: 18.5 °dH in the north of the town and 21.2 °dH in the south. Kirchfembach-West, Kirchfembach-East and Erlachskirchen are listed in a separate report that is not covered here. Which zone you are in depends on your address.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 19.8 °dH |
|---|---|
| Utility | Stadtwerke Langenzenn |
How Langenzenn compares
- Tap water in Langenzenn is 73 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 73 of 809 in Germany (1 = hardest); 91 % of these cities have softer water.
- In Bayern it is number 21 of 137 cities; the regional median is 15.8 °dH.
- Nearest city with clearly softer water: Weisendorf, 12 km away (14.5 °dH).
- Nearest city with clearly harder water: Schlüsselfeld, 29 km away (25.6 °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 Langenzenn
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 20 °dH |
| AEG / Electrolux | 5 |
| Beko | 6th |
| 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 Langenzenn water hard or soft?
It is very hard: 354 mg/L as CaCO₃ (20.7 gpg, 19.8 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Langenzenn 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 Langenzenn water?
20.7 gpg, equal to 19.8 °dH, 35.4 °fH or 354 mg/L calcium carbonate.
What dishwasher salt setting should I use in Langenzenn?
For 354 mg/L (19.8 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Langenzenn?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadtwerke Langenzenn, Trinkwasseranalysen im Stadtgebiet Langenzenn (Stand 08/2026) (2026-08). Method: figure published by the water supplier. Stadtwerke Langenzenn, Trinkwasseranalysen im Stadtgebiet Langenzenn (Stand 08/2026) · Outdated figure? Tell us