Water hardness in Hrubý Lesnov
1.45 mmol/L hard
Tap water in Hrubý Lesnov is hard: 1.45 mmol/L (145 mg/L · 8.5 gpg · 8.1 °dH).
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026) · data checked 2026-10-21
SčVK reports 145.1 mg/L CaCO₃ for Hrubý Lesnov in the Liberec Region, in the hard band. The utility page does not state the source for this village. Expect visible limescale on kettles, taps and shower heads.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 1.45 mmol/L |
|---|---|
| Calcium (mg/L) | 55 |
| Magnesium (mg/L) | 2 |
| Utility | Severočeské vodovody a kanalizace, a.s. (SčVK) |
How Hrubý Lesnov compares
- Tap water in Hrubý Lesnov is 21 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 494 of 1516 in Czechia (1 = hardest); 67 % of these cities have softer water.
- In Liberecký kraj it is number 118 of 273 cities; the regional median is 1.26 mmol/L.
- Nearest city with clearly softer water: Druzcov, 8 km away (0.45 mmol/L).
- Nearest city with clearly harder water: Lesnovek, 1 km away (2.7 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 Hrubý Lesnov
| 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 Hrubý Lesnov water hard or soft?
It is hard: 145 mg/L as CaCO₃ (8.5 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 Hrubý Lesnov 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 Hrubý Lesnov water?
8.5 gpg, equal to 8.1 °dH, 14.5 °fH or 145 mg/L calcium carbonate.
What dishwasher salt setting should I use in Hrubý Lesnov?
For 145 mg/L (8.1 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Hrubý Lesnov?
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