Water hardness in Straubing
21.7 °dH very hard
Tap water in Straubing is very hard: 21.7 °dH (387 mg/L · 22.6 gpg · 38.7 °fH).
Source: Stadtwerke Straubing GmbH - Qualität, Auszug aus der Wasseranalyse Dezember 2024 (2024-12) · data checked 2026-10-23
Stadtwerke Straubing publishes an extract of its water analysis, and the December 2024 edition gives 387.3 mg/L CaCO₃. This is a single figure for the town, with no breakdown by zone, and it is older than most entries in this dataset. It is clearly harder than Regensburg (301.7 mg/L) and much harder than Passau (182.1 mg/L), so do not borrow a value from a neighbouring city.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 21.7 °dH |
|---|---|
| Utility | Stadtwerke Straubing GmbH |
How Straubing compares
- Tap water in Straubing is 89 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 42 of 809 in Germany (1 = hardest); 95 % of these cities have softer water.
- In Bayern it is number 8 of 137 cities; the regional median is 15.8 °dH.
- Nearest city with clearly softer water: Deggendorf, 29 km away (3.7 °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 Straubing
| 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 Straubing water hard or soft?
It is very hard: 387 mg/L as CaCO₃ (22.6 gpg, 21.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Straubing 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 Straubing water?
22.6 gpg, equal to 21.7 °dH, 38.7 °fH or 387 mg/L calcium carbonate.
What dishwasher salt setting should I use in Straubing?
For 387 mg/L (21.7 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Straubing?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadtwerke Straubing GmbH - Qualität, Auszug aus der Wasseranalyse Dezember 2024 (2024-12). Method: figure published by the water supplier. Stadtwerke Straubing GmbH - Qualität, Auszug aus der Wasseranalyse Dezember 2024 · Outdated figure? Tell us