Water hardness in Kruh
2.51 mmol/L very hard
Tap water in Kruh is very hard: 2.51 mmol/L (252 mg/L · 14.7 gpg · 14.1 °dH).
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026) · data checked 2026-10-21
Range across supply zones: 248–255 mg/L.
Kruh, in the Česká Lípa area of Liberecký kraj, is supplied by SčVK, which reports 248.2 to 255.2 mg/L, with a median of 251.7 mg/L. That is very hard water. The utility page does not give the source, so we do not describe the geology. Scale will form quickly in kettles, boilers and washing machines, so consider a softener.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 2.51 mmol/L |
|---|---|
| Calcium (mg/L) | 83.5 |
| Magnesium (mg/L) | 10.1 |
| Utility | Severočeské vodovody a kanalizace, a.s. (SčVK) |
How Kruh compares
- Tap water in Kruh is 110 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 282 of 1516 in Czechia (1 = hardest); 81 % of these cities have softer water.
- In Liberecký kraj it is number 50 of 273 cities; the regional median is 1.26 mmol/L.
- Nearest city with clearly softer water: Žďár, 1 km away (1.91 mmol/L).
- Nearest city with clearly harder water: Dubá, 10 km away (3.67 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 Kruh
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 14 °dH |
| AEG / Electrolux | 3 |
| Beko | 4th |
| Hoover | S2 |
| LG | H3 |
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 Kruh water hard or soft?
It is very hard: 252 mg/L as CaCO₃ (14.7 gpg, 14.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Kruh 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 Kruh water?
14.7 gpg, equal to 14.1 °dH, 25.2 °fH or 252 mg/L calcium carbonate.
What dishwasher salt setting should I use in Kruh?
For 252 mg/L (14.1 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Kruh?
Yes, unless you are only passing through: scale damages appliances within a few years.
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