Water hardness in Košov
1.89 mmol/L very hard
Tap water in Košov is very hard: 1.89 mmol/L (189 mg/L · 11.1 gpg · 10.6 °dH).
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026) · data checked 2026-10-21
SčVK reports 189.2 mg/L CaCO₃ for Košov in the Semily district of the Liberec Region, which is very hard. This is higher than many nearby villages in the region. The utility does not name the source, so we cannot explain the figure further. Limescale builds up quickly on heating elements.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 1.89 mmol/L |
|---|---|
| Calcium (mg/L) | 51 |
| Magnesium (mg/L) | 15 |
| Utility | Severočeské vodovody a kanalizace, a.s. (SčVK) |
How Košov compares
- Tap water in Košov is 58 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 388 of 1516 in Czechia (1 = hardest); 74 % of these cities have softer water.
- In Liberecký kraj it is number 90 of 273 cities; the regional median is 1.26 mmol/L.
- Nearest city with clearly softer water: Rváčov, 2 km away (1.08 mmol/L).
- Nearest city with clearly harder water: Tachov, 9 km away (2.66 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 Košov
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 11 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S2 |
| 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 Košov water hard or soft?
It is very hard: 189 mg/L as CaCO₃ (11.1 gpg, 10.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Košov 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 Košov water?
11.1 gpg, equal to 10.6 °dH, 18.9 °fH or 189 mg/L calcium carbonate.
What dishwasher salt setting should I use in Košov?
For 189 mg/L (10.6 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Košov?
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