Water hardness in Homburg
6.4 °dH moderately hard
Tap water in Homburg is moderately hard: 6.4 °dH (115 mg/L · 6.7 gpg · 11.5 °fH).
Source: Stadtwerke Homburg – Trinkwasseranalyse (2026) · data checked 2026-10-23
Range across supply zones: 90–139 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| Wasserwerk Homburg | 7.8 | 139 | hard |
| Wasserwerk Kirrberg | 5.1 | 90 | moderately hard |
Stadtwerke Homburg publishes analyses for two waterworks. Wasserwerk Homburg is at 138.9 mg/L CaCO₃ and Wasserwerk Kirrberg at 90.2 mg/L. The town figure is 114.6 mg/L, in the moderate category. Saarlouis (171.4 mg/L) is harder and Pirmasens (70.1 mg/L) softer, so hardness changes quickly across the region.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 6.4 °dH |
|---|---|
| Utility | Stadtwerke Homburg GmbH |
How Homburg compares
- Tap water in Homburg is 44 % softer than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 680 of 809 in Germany (1 = hardest); 16 % of these cities have softer water.
- In Saarland it is number 7 of 11 cities; the regional median is 7.9 °dH.
- Nearest city with clearly softer water: Pirmasens, 23 km away (3.9 °dH).
- Nearest city with clearly harder water: Bexbach, 4 km away (9.9 °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 Homburg
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 6 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| 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 Homburg water hard or soft?
It is moderately hard: 115 mg/L as CaCO₃ (6.7 gpg, 6.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Homburg 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 Homburg water?
6.7 gpg, equal to 6.4 °dH, 11.5 °fH or 115 mg/L calcium carbonate.
What dishwasher salt setting should I use in Homburg?
For 115 mg/L (6.4 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Homburg?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Stadtwerke Homburg – Trinkwasseranalyse (2026). Method: figure published by the water supplier. Stadtwerke Homburg – Trinkwasseranalyse · Outdated figure? Tell us