Water hardness in Blumberg
16.4 °dH very hard
Tap water in Blumberg is very hard: 16.4 °dH (293 mg/L · 17.1 gpg · 29.3 °fH).
Source: Stadt Blumberg - Untersuchungsergebnisse Trinkwasser, Probenahme August 2025 (2025-08) · data checked 2026-11-03
Range across supply zones: 268–368 mg/L.
7 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| HB Hondingen | 15.8 | 282 | very hard |
| HB Kleiner Buchberg | 16.8 | 300 | very hard |
| HB Riedöschingen | 16.4 | 293 | very hard |
| TB Im Sand Binningen | 16.3 | 291 | very hard |
| TB Kuhstubengarten | 15 | 268 | very hard |
| WB Kureselquelle (Zollhaus Niederdruckzone) | 20.6 | 368 | very hard |
| WB Randen | 18.5 | 330 | very hard |
The town's water utility reports 7 supply zones, with total hardness from 15.0 to 20.6 °dH in samples taken in August 2025. The stored median across zones is 292.7 mg/L CaCO₃, but the figure for your street depends on the zone, so use the range rather than the single number. The report classes every zone as hard.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 16.4 °dH |
|---|---|
| Utility | Stadt Blumberg, Wasserversorgung (Bauamt) |
How Blumberg compares
- Tap water in Blumberg is 43 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 208 of 809 in Germany (1 = hardest); 74 % of these cities have softer water.
- Nearest city with clearly softer water: Löffingen, 14 km away (11.9 °dH).
- Nearest city with clearly harder water: Stühlingen, 13 km away (21.6 °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 Blumberg
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 16 °dH |
| AEG / Electrolux | 4 |
| Beko | 5th |
| Hoover | S2 |
| 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 Blumberg water hard or soft?
It is very hard: 293 mg/L as CaCO₃ (17.1 gpg, 16.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Blumberg 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 Blumberg water?
17.1 gpg, equal to 16.4 °dH, 29.3 °fH or 293 mg/L calcium carbonate.
What dishwasher salt setting should I use in Blumberg?
For 293 mg/L (16.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Blumberg?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadt Blumberg - Untersuchungsergebnisse Trinkwasser, Probenahme August 2025 (2025-08). Method: figure published by the water supplier. Stadt Blumberg - Untersuchungsergebnisse Trinkwasser, Probenahme August 2025 · Outdated figure? Tell us