Water hardness in Střelské Hoštice
1.42 mmol/L hard
Tap water in Střelské Hoštice is hard: 1.42 mmol/L (142 mg/L · 8.3 gpg · 8 °dH).
Source: ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody (2025) · data checked 2026-10-21
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 1.42 mmol/L |
|---|---|
| Calcium (mg/L) | 42 |
| Magnesium (mg/L) | 9.1 |
| Utility | ČEVAK a.s. |
How Střelské Hoštice compares
- Tap water in Střelské Hoštice is 18 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 504 of 1516 in Czechia (1 = hardest); 66 % of these cities have softer water.
- In Jihočeský kraj it is number 51 of 505 cities; the regional median is 1.2 mmol/L.
- Nearest city with clearly softer water: Veřechov, 4 km away (1.11 mmol/L).
- Nearest city with clearly harder water: Horní Poříčí, 2 km away (2.59 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 Střelské Hoštice
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 8 °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 Střelské Hoštice water hard or soft?
It is hard: 142 mg/L as CaCO₃ (8.3 gpg, 8 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Střelské Hoštice 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 Střelské Hoštice water?
8.3 gpg, equal to 8 °dH, 14.2 °fH or 142 mg/L calcium carbonate.
What dishwasher salt setting should I use in Střelské Hoštice?
For 142 mg/L (8 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Střelské Hoštice?
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 (2025). Method: figure published by the water supplier. ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody · Outdated figure? Tell us