Water hardness in Chrašťany
1.42 mmol/L hard
Tap water in Chrašťany is hard: 1.42 mmol/L (142 mg/L · 8.3 gpg · 8 °dH).
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026) · data checked 2026-10-21
Chrašťany, in the Louny area of Ústecký kraj, is supplied by SčVK, which reports 142.1 mg/L. That puts it in the hard category. Hardness in this part of the region varies from village to village, so check the utility's own page for your street. Expect visible limescale on kettles and shower screens, and consider descaling appliances regularly.
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) | 39 |
| Magnesium (mg/L) | 10.6 |
| Utility | Severočeské vodovody a kanalizace, a.s. (SčVK) |
How Chrašťany compares
- Tap water in Chrašťany 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 Ústecký kraj it is number 287 of 631 cities; the regional median is 1.31 mmol/L.
- Nearest city with clearly softer water: Veliká Ves, 2 km away (0.86 mmol/L).
- Nearest city with clearly harder water: Podlesice, 3 km away (2.05 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 Chrašťany
| 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 Chrašťany 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 Chrašťany 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 Chrašťany 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 Chrašťany?
For 142 mg/L (8 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Chrašťany?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
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