Water hardness in Předboř
1.13 mmol/L moderately hard
Tap water in Předboř is moderately hard: 1.13 mmol/L (113 mg/L · 6.6 gpg · 6.3 °dH).
Source: ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody (2026) · data checked 2026-10-21
ČEVAK a.s. reports 113.1 mg/L CaCO₃ for Předboř in the Jihočeský kraj, which falls in the moderate band. The utility's page lists the figure but does not name the water source for this village, so we do not say whether it is groundwater or surface water. At this level, limescale on kettles and shower screens builds slowly and a softener is rarely needed.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 1.13 mmol/L |
|---|---|
| Calcium (mg/L) | 27 |
| Magnesium (mg/L) | 11 |
| Utility | ČEVAK a.s. |
How Předboř compares
- Tap water in Předboř is 6 % softer than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 822 of 1516 in Czechia (1 = hardest); 45 % of these cities have softer water.
- In Jihočeský kraj it is number 284 of 505 cities; the regional median is 1.2 mmol/L.
- Nearest city with clearly softer water: Tučapy, 5 km away (0.8 mmol/L).
- Nearest city with clearly harder water: Ratibořské Hory, 17 km away (1.97 mmol/L).
Ranking of the hardest and softest water in Czechia →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Předboř
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 6 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Předboř water hard or soft?
It is moderately hard: 113 mg/L as CaCO₃ (6.6 gpg, 6.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Předboř 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 Předboř water?
6.6 gpg, equal to 6.3 °dH, 11.3 °fH or 113 mg/L calcium carbonate.
What dishwasher salt setting should I use in Předboř?
For 113 mg/L (6.3 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Předboř?
Not essential; a scale inhibitor protects the heater cheaply.
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