Water hardness in Viborg
8.1 °dH hard
Tap water in Viborg is hard: 8.1 °dH (145 mg/L · 8.4 gpg · 14.5 °fH).
Source: GEUS, Drikkevandets hårdhed i Danmark (Jupiter database), CC BY 4.0 (2020) · data checked 2026-10-19
Range across supply zones: 109–180 mg/L.
This figure is over 3 years old; hardness may have changed.
All of Denmark's tap water is groundwater, here drawn from sand and gravel aquifers in glacial and meltwater deposits. The GEUS-reported hardness is 144.6 mg/L CaCO₃, with values from 108.9 to 180.3 mg/L depending on the street. The figure dates from 2020 and may have changed. Scale builds up moderately, and regular descaling of kettles and showers is usually enough.
Danish waterworks report hardness in °dH; GEUS classes: soft < 8, medium hard 8–12, fairly hard 12–18, hard 18–30, very hard > 30 °dH. Most Danish tap water is groundwater and hard.
Water data
| Total hardness | 8.1 °dH |
|---|
How Viborg compares
- Tap water in Viborg is 46 % softer than the median of the 388 cities we track in Denmark (14.9 °dH).
- By hardness it ranks 348 of 388 in Denmark (1 = hardest); 9 % of these cities have softer water.
- In Central Jutland it is number 70 of 90 cities; the regional median is 11.7 °dH.
- Nearest city with clearly softer water: Karup, 22 km away (5.3 °dH).
- Nearest city with clearly harder water: Bjerringbro, 18 km away (10.3 °dH).
Ranking of the hardest and softest water in Denmark →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Viborg
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 8 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S1 |
| LG | H2 |
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 Viborg water hard or soft?
It is hard: 145 mg/L as CaCO₃ (8.4 gpg, 8.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Viborg safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Danish waterworks report hardness in °dH; GEUS classes: soft < 8, medium hard 8–12, fairly hard 12–18, hard 18–30, very hard > 30 °dH. Most Danish tap water is groundwater and hard.
How many grains per gallon is Viborg water?
8.4 gpg, equal to 8.1 °dH, 14.5 °fH or 145 mg/L calcium carbonate.
What dishwasher salt setting should I use in Viborg?
For 145 mg/L (8.1 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Viborg?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: GEUS, Drikkevandets hårdhed i Danmark (Jupiter database), CC BY 4.0 (2020). Method: figure published by the water supplier. GEUS, Drikkevandets hårdhed i Danmark (Jupiter database), CC BY 4.0 · Outdated figure? Tell us