Water hardness in Varnsdorf
0.71 mmol/L moderately hard
Tap water in Varnsdorf is moderately hard: 0.71 mmol/L (71 mg/L · 4.2 gpg · 4 °dH).
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026) · data checked 2026-10-21
Range across supply zones: 48–172 mg/L.
Varnsdorf is part of the Varnsdorf–Chřibská group supply, which uses the Chřibská treatment plant and the Lesné groundwater source. Reported hardness is 71.1 mg/L CaCO₃ within a range of 48.0 to 172.2 mg/L, so some parts of the network receive noticeably harder water. At the median value limescale builds up slowly.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 0.71 mmol/L |
|---|---|
| Calcium (mg/L) | 23 |
| Magnesium (mg/L) | 2.88 |
| Utility | Severočeské vodovody a kanalizace, a.s. (SčVK) |
How Varnsdorf compares
- Tap water in Varnsdorf is 41 % softer than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 1270 of 1516 in Czechia (1 = hardest); 16 % of these cities have softer water.
- In Ústecký kraj it is number 541 of 631 cities; the regional median is 1.31 mmol/L.
- Nearest city with clearly softer water: Rumburk, 6 km away (0.5 mmol/L).
- Nearest city with clearly harder water: Krásná Lípa, 8 km away (1.1 mmol/L).
Ranking of the hardest and softest water in Czechia →
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 Varnsdorf
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 4 °dH |
| AEG / Electrolux | 2 |
| Beko | 1st |
| 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 Varnsdorf water hard or soft?
It is moderately hard: 71 mg/L as CaCO₃ (4.2 gpg, 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 Varnsdorf safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
How many grains per gallon is Varnsdorf water?
4.2 gpg, equal to 4 °dH, 7.1 °fH or 71 mg/L calcium carbonate.
What dishwasher salt setting should I use in Varnsdorf?
For 71 mg/L (4 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Varnsdorf?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026). Method: figure published by the water supplier. SčVK, Moje obec – kvalita vody (aktuální hodnoty) · Outdated figure? Tell us