Water hardness in Radejčín
2.75 mmol/L very hard
Tap water in Radejčín is very hard: 2.75 mmol/L (276 mg/L · 16.1 gpg · 15.4 °dH).
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026) · data checked 2026-10-21
Range across supply zones: 244–307 mg/L.
SčVK reports a median of 275.7 mg/L as CaCO₃ for Radejčín, with values from 244.2 to 307.3 mg/L across the 2026 readings. That is very hard water. The utility page does not name the source for this village, so we only note that supply in parts of Ústecký kraj is known to run hard. Expect fast scale in kettles and 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 | 2.75 mmol/L |
|---|---|
| Calcium (mg/L) | 88 |
| Magnesium (mg/L) | 13.3 |
| Utility | Severočeské vodovody a kanalizace, a.s. (SčVK) |
How Radejčín compares
- Tap water in Radejčín is 130 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 257 of 1516 in Czechia (1 = hardest); 83 % of these cities have softer water.
- In Ústecký kraj it is number 209 of 631 cities; the regional median is 1.31 mmol/L.
- Nearest city with clearly softer water: Žim, 2 km away (1.9 mmol/L).
- Nearest city with clearly harder water: Dubice, 1 km away (3.71 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 Radejčín
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 15 °dH |
| AEG / Electrolux | 4 |
| 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 Radejčín water hard or soft?
It is very hard: 276 mg/L as CaCO₃ (16.1 gpg, 15.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Radejčín 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 Radejčín water?
16.1 gpg, equal to 15.4 °dH, 27.6 °fH or 276 mg/L calcium carbonate.
What dishwasher salt setting should I use in Radejčín?
For 276 mg/L (15.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Radejčín?
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