Water hardness in Hostkovice
1.72 mmol/L hard
Tap water in Hostkovice is hard: 1.72 mmol/L (172 mg/L · 10.1 gpg · 9.6 °dH).
Source: ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody (2026) · data checked 2026-10-21
Hostkovice in the Jihočeský kraj is reported by ČEVAK a.s. at 172.2 mg/L as CaCO₃, which is hard and among the higher values in this area. Expect visible limescale on heating elements and glass. We have not verified the village's water source, so check the utility page for updates.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 1.72 mmol/L |
|---|---|
| Calcium (mg/L) | 44 |
| Magnesium (mg/L) | 15 |
| Utility | ČEVAK a.s. |
How Hostkovice compares
- Tap water in Hostkovice is 43 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 421 of 1516 in Czechia (1 = hardest); 72 % of these cities have softer water.
- In Jihočeský kraj it is number 35 of 505 cities; the regional median is 1.2 mmol/L.
- Nearest city with clearly softer water: Peč, 3 km away (0.95 mmol/L).
- Nearest city with clearly harder water: Lužnice, 46 km away (2.5 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 Hostkovice
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 10 °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 Hostkovice water hard or soft?
It is hard: 172 mg/L as CaCO₃ (10.1 gpg, 9.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Hostkovice 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 Hostkovice water?
10.1 gpg, equal to 9.6 °dH, 17.2 °fH or 172 mg/L calcium carbonate.
What dishwasher salt setting should I use in Hostkovice?
For 172 mg/L (9.6 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Hostkovice?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
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