Water hardness in Čermná
0.39 mmol/L soft
Tap water in Čermná is soft: 0.39 mmol/L (40 mg/L · 2.3 gpg · 2.2 °dH).
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026) · data checked 2026-10-21
Range across supply zones: 39–40 mg/L.
Čermná is supplied by SčVK in the Ústí Region and the published hardness is 39.5 mg/L, with a range of 39.0 to 40.0 mg/L. That narrow range suggests a steady supply. The water is soft, so scale is minimal and no softener is needed for hardness reasons.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 0.39 mmol/L |
|---|---|
| Calcium (mg/L) | 11.5 |
| Magnesium (mg/L) | 2.38 |
| Utility | Severočeské vodovody a kanalizace, a.s. (SčVK) |
How Čermná compares
- Tap water in Čermná is 67 % softer than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 1457 of 1516 in Czechia (1 = hardest); 4 % of these cities have softer water.
- In Ústecký kraj it is number 611 of 631 cities; the regional median is 1.31 mmol/L.
- Nearest city with clearly softer water: Mezná, 21 km away (0.2 mmol/L).
- Nearest city with clearly harder water: Mnichov, 2 km away (0.51 mmol/L).
Ranking of the hardest and softest water in Czechia →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Čermná
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 2 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
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 Čermná water hard or soft?
It is soft: 40 mg/L as CaCO₃ (2.3 gpg, 2.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Čermná 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 Čermná water?
2.3 gpg, equal to 2.2 °dH, 4 °fH or 40 mg/L calcium carbonate.
What dishwasher salt setting should I use in Čermná?
For 40 mg/L (2.2 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Čermná?
No. With soft water a softener adds nothing.
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