Water hardness in Žár
2.12 mmol/L very hard
Tap water in Žár is very hard: 2.12 mmol/L (212 mg/L · 12.4 gpg · 11.9 °dH).
Source: ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody (2026) · data checked 2026-10-21
ČEVAK reports 212.2 mg/L for Žár in the Prachatice district, which is very hard. Scale will build up faster here than in much of the South Bohemian region, where many localities are near 120 mg/L. A softener or frequent descaling of the boiler and kettle 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 | 2.12 mmol/L |
|---|---|
| Calcium (mg/L) | 52 |
| Magnesium (mg/L) | 20 |
| Utility | ČEVAK a.s. |
How Žár compares
- Tap water in Žár is 77 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 346 of 1516 in Czechia (1 = hardest); 77 % of these cities have softer water.
- In Jihočeský kraj it is number 17 of 505 cities; the regional median is 1.2 mmol/L.
- Nearest city with clearly softer water: Nespice, 1 km away (0.92 mmol/L).
- Nearest city with clearly harder water: Malý Bor, 25 km away (2.74 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 Žár
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 12 °dH |
| AEG / Electrolux | 3 |
| Beko | 3rd |
| Hoover | S2 |
| 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 Žár water hard or soft?
It is very hard: 212 mg/L as CaCO₃ (12.4 gpg, 11.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Žár 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 Žár water?
12.4 gpg, equal to 11.9 °dH, 21.2 °fH or 212 mg/L calcium carbonate.
What dishwasher salt setting should I use in Žár?
For 212 mg/L (11.9 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Žár?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody (2026). Method: figure published by the water supplier. ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody · Outdated figure? Tell us