Water hardness in Zámlyní
1.91 mmol/L very hard
Tap water in Zámlyní is very hard: 1.91 mmol/L (191 mg/L · 11.2 gpg · 10.7 °dH).
Source: ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody (2025) · data checked 2026-10-21
Zámlyní is served by ČEVAK (Veolia) in the South Bohemian Region. The reported value is 191 mg/L as CaCO₃, in the very hard band. This figure is dated 2025, one year older than most in this batch. The source of the supply is not stated, so expect heavy limescale and treat the figure as the utility's own.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 1.91 mmol/L |
|---|---|
| Calcium (mg/L) | 47 |
| Magnesium (mg/L) | 18 |
| Utility | ČEVAK a.s. |
How Zámlyní compares
- Tap water in Zámlyní is 59 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 380 of 1516 in Czechia (1 = hardest); 75 % of these cities have softer water.
- In Jihočeský kraj it is number 26 of 505 cities; the regional median is 1.2 mmol/L.
- Nearest city with clearly softer water: Lnáře, 4 km away (1.45 mmol/L).
- Nearest city with clearly harder water: Malý Bor, 19 km away (2.74 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 Zámlyní
| 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 Zámlyní water hard or soft?
It is very hard: 191 mg/L as CaCO₃ (11.2 gpg, 10.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Zámlyní 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 Zámlyní water?
11.2 gpg, equal to 10.7 °dH, 19.1 °fH or 191 mg/L calcium carbonate.
What dishwasher salt setting should I use in Zámlyní?
For 191 mg/L (10.7 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Zámlyní?
Yes, unless you are only passing through: scale damages appliances within a few years.
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