Water hardness in Dubčany
4.8 mmol/L very hard
Tap water in Dubčany is very hard: 4.8 mmol/L (480 mg/L · 28.1 gpg · 26.9 °dH).
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026) · data checked 2026-10-21
SčVK reports 480.4 mg/L hardness as CaCO₃ for Dubčany in the Louny area of the Ústí Region, which is very hard and among the highest values in this dataset. The utility page does not explain the cause or name the source, so we do not guess. Scale will form fast on heaters and taps, and a softener is worth considering.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 4.8 mmol/L |
|---|---|
| Calcium (mg/L) | 125 |
| Magnesium (mg/L) | 40.8 |
| Utility | Severočeské vodovody a kanalizace, a.s. (SčVK) |
How Dubčany compares
- Tap water in Dubčany is 300 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 54 of 1516 in Czechia (1 = hardest); 97 % of these cities have softer water.
- In Ústecký kraj it is number 54 of 631 cities; the regional median is 1.31 mmol/L.
- Nearest city with clearly softer water: Strkovice, 3 km away (0.79 mmol/L).
- Nearest city with clearly harder water: Chodovlice, 31 km away (6.14 mmol/L).
Ranking of the hardest and softest water in Czechia →
What it means at home
- Severe scale: heater elements and washing-machine heaters fail early.
- Detergent use is very high; taps and screens coat within days.
- Dishwasher at maximum salt setting.
- An ion-exchange softener is practically essential; RO for drinking water.
How much salt will you use for softening?
Yes. At this hardness a softener pays for itself through appliance life and detergent.
Descale a coffee machine or kettle about every 1 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Dubčany
| Brand | Setting for this water |
|---|---|
| Bosch | H06 |
| Miele | 27 °dH |
| AEG / Electrolux | 6 |
| Beko | 6th |
| Hoover | S4 |
| LG | H4 |
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 Dubčany water hard or soft?
It is very hard: 480 mg/L as CaCO₃ (28.1 gpg, 26.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Dubčany 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 Dubčany water?
28.1 gpg, equal to 26.9 °dH, 48 °fH or 480 mg/L calcium carbonate.
What dishwasher salt setting should I use in Dubčany?
For 480 mg/L (26.9 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Dubčany?
Yes, unless you are only passing through: scale damages appliances within a few years.
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