Water hardness in Velká Černoc
1.41 mmol/L hard
Tap water in Velká Černoc is hard: 1.41 mmol/L (141 mg/L · 8.2 gpg · 7.9 °dH).
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026) · data checked 2026-10-21
Severočeské vodovody a kanalizace (SčVK) reports 141.1 mg/L hardness as CaCO₃ for Velká Černoc, which falls in the hard band. The utility's page does not name the village's individual source, so this note cannot say which one feeds it. At this level, expect limescale on kettles and heating elements.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 1.41 mmol/L |
|---|---|
| Calcium (mg/L) | 40 |
| Magnesium (mg/L) | 9.9 |
| Utility | Severočeské vodovody a kanalizace, a.s. (SčVK) |
How Velká Černoc compares
- Tap water in Velká Černoc is 17 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 511 of 1516 in Czechia (1 = hardest); 66 % of these cities have softer water.
- In Ústecký kraj it is number 290 of 631 cities; the regional median is 1.31 mmol/L.
- Nearest city with clearly softer water: Hřivice, 14 km away (0.78 mmol/L).
- Nearest city with clearly harder water: Deštnice, 4 km away (3.79 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 Velká Černoc
| 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 Velká Černoc water hard or soft?
It is hard: 141 mg/L as CaCO₃ (8.2 gpg, 7.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Velká Černoc 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 Velká Černoc water?
8.2 gpg, equal to 7.9 °dH, 14.1 °fH or 141 mg/L calcium carbonate.
What dishwasher salt setting should I use in Velká Černoc?
For 141 mg/L (7.9 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Velká Černoc?
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