Water hardness in Velký Grunov
1.51 mmol/L hard
Tap water in Velký Grunov is hard: 1.51 mmol/L (152 mg/L · 8.9 gpg · 8.5 °dH).
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026) · data checked 2026-10-21
Range across supply zones: 142–161 mg/L.
SčVK reports a median of 151.6 mg/L as CaCO₃ for Velký Grunov, with published values from 142.1 to 161.1 mg/L. That is hard water, and the spread suggests the value shifts a little between samples or supply points. The utility page does not state the source, so check the current figure on SčVK's Moje obec page. Scale on taps and kettles is the usual result.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 1.51 mmol/L |
|---|---|
| Calcium (mg/L) | 55.5 |
| Magnesium (mg/L) | 2.58 |
| Utility | Severočeské vodovody a kanalizace, a.s. (SčVK) |
How Velký Grunov compares
- Tap water in Velký Grunov is 26 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 479 of 1516 in Czechia (1 = hardest); 68 % of these cities have softer water.
- In Liberecký kraj it is number 115 of 273 cities; the regional median is 1.26 mmol/L.
- Nearest city with clearly softer water: Noviny pod Ralskem, 2 km away (0.85 mmol/L).
- Nearest city with clearly harder water: Ploužnice, 7 km away (1.9 mmol/L).
Ranking of the hardest and softest water in Czechia →
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 Velký Grunov
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| 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 Velký Grunov water hard or soft?
It is hard: 152 mg/L as CaCO₃ (8.9 gpg, 8.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Velký Grunov 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 Velký Grunov water?
8.9 gpg, equal to 8.5 °dH, 15.2 °fH or 152 mg/L calcium carbonate.
What dishwasher salt setting should I use in Velký Grunov?
For 152 mg/L (8.5 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Velký Grunov?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
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