Water hardness in Trmice
2.53 mmol/L very hard
Tap water in Trmice is very hard: 2.53 mmol/L (254 mg/L · 14.8 gpg · 14.2 °dH).
Source: SčVK, Moje obec – kvalita vody (aktuální hodnoty) (2026) · data checked 2026-10-21
Range across supply zones: 73–535 mg/L.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 2.53 mmol/L |
|---|---|
| Calcium (mg/L) | 83 |
| Magnesium (mg/L) | 11.2 |
| Utility | Severočeské vodovody a kanalizace, a.s. (SčVK) |
How Trmice compares
- Tap water in Trmice is 111 % harder than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 279 of 1516 in Czechia (1 = hardest); 82 % of these cities have softer water.
- In Ústecký kraj it is number 216 of 631 cities; the regional median is 1.31 mmol/L.
- Nearest city with clearly softer water: Hrbovice, 3 km away (0.77 mmol/L).
- Nearest city with clearly harder water: Hliňany, 4 km away (3.18 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 Trmice
| 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 Trmice water hard or soft?
It is very hard: 254 mg/L as CaCO₃ (14.8 gpg, 14.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Trmice 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 Trmice water?
14.8 gpg, equal to 14.2 °dH, 25.4 °fH or 254 mg/L calcium carbonate.
What dishwasher salt setting should I use in Trmice?
For 254 mg/L (14.2 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Trmice?
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