Water hardness in Holzkirchen
18.5 °dH very hard
Tap water in Holzkirchen is very hard: 18.5 °dH (330 mg/L · 19.3 gpg · 33 °fH).
Source: Gemeindewerke Holzkirchen, AGROLAB Prüfbericht Analysennummer 265147 (2026-08) · data checked 2026-11-03
The figure of 330.2 mg/L CaCO₃ comes from one measured sample taken at the town hall tap in August 2026 and reported by Gemeindewerke Holzkirchen. It is not a citywide average, and the utility's own web page prints a slightly lower, undated range, so treat the number as indicative. Ask the utility which supply feeds your street before you size a softener.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 18.5 °dH |
|---|---|
| Utility | Gemeindewerke Holzkirchen GmbH |
How Holzkirchen compares
- Tap water in Holzkirchen is 61 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 127 of 809 in Germany (1 = hardest); 84 % of these cities have softer water.
- Nearest city with clearly softer water: Karlsfeld, 43 km away (2.6 °dH).
- Nearest city with clearly harder water: Tuntenhausen, 29 km away (23.9 °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 Holzkirchen
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 18 °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 Holzkirchen water hard or soft?
It is very hard: 330 mg/L as CaCO₃ (19.3 gpg, 18.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Holzkirchen 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 Holzkirchen water?
19.3 gpg, equal to 18.5 °dH, 33 °fH or 330 mg/L calcium carbonate.
What dishwasher salt setting should I use in Holzkirchen?
For 330 mg/L (18.5 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Holzkirchen?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Gemeindewerke Holzkirchen, AGROLAB Prüfbericht Analysennummer 265147 (2026-08). Method: own measurement. Gemeindewerke Holzkirchen, AGROLAB Prüfbericht Analysennummer 265147 · Outdated figure? Tell us