Water hardness in Ladenburg
21.9 °dH very hard
Tap water in Ladenburg is very hard: 21.9 °dH (391 mg/L · 22.8 gpg · 39.1 °fH).
Source: Wasserversorgung Ladenburg Basisbehälter - Prüfbericht UniversitätsKlinikum Heidelberg, Auftragsnr. 53975335 (2026-09) · data checked 2026-11-03
The figure of 21.9 °dH comes from a single test report dated 14 September 2026 for a sample taken on 28 July 2026 at the Basisbehälter, the reservoir, so it is one reservoir sample and not a reading from several points in the network. The supplier is listed as Wassergewinnungsverband Lobdengau, and the town's own page gives about 22 °dH, which agrees. The report prints calcium at 123.0 mg/L and magnesium at 20.3 mg/L, and I could not verify where the raw water comes from, so no source or geology is stated here.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 21.9 °dH |
|---|---|
| Utility | Wassergewinnungsverband Lobdengau (with Zweckverband Obere Bergstraße for Heddesheim and Hirschberg) |
How Ladenburg compares
- Tap water in Ladenburg is 90 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 37 of 809 in Germany (1 = hardest); 96 % of these cities have softer water.
- In Baden-Württemberg it is number 7 of 146 cities; the regional median is 12.8 °dH.
- Nearest city with clearly softer water: Weinheim, 9 km away (15.1 °dH).
- Nearest city with clearly harder water: Nußloch, 21 km away (31.6 °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 Ladenburg
| Brand | Setting for this water |
|---|---|
| Bosch | H06 |
| Miele | 22 °dH |
| AEG / Electrolux | 5 |
| 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 Ladenburg water hard or soft?
It is very hard: 391 mg/L as CaCO₃ (22.8 gpg, 21.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Ladenburg 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 Ladenburg water?
22.8 gpg, equal to 21.9 °dH, 39.1 °fH or 391 mg/L calcium carbonate.
What dishwasher salt setting should I use in Ladenburg?
For 391 mg/L (21.9 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Ladenburg?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Wasserversorgung Ladenburg Basisbehälter - Prüfbericht UniversitätsKlinikum Heidelberg, Auftragsnr. 53975335 (2026-09). Method: figure published by the water supplier. Wasserversorgung Ladenburg Basisbehälter - Prüfbericht UniversitätsKlinikum Heidelberg, Auftragsnr. 53975335 · Outdated figure? Tell us