Water hardness in Detva
0.7 mmol/L moderately hard
Tap water in Detva is moderately hard: 0.7 mmol/L (70 mg/L · 4.1 gpg · 3.9 °dH).
Source: Stredoslovenská vodárenská prevádzková spoločnosť (StVPS) (2026) · data checked 2026-10-20
Range across supply zones: 50–70 mg/L.
StVPS supplies this town; its sources in central Slovakia include reservoirs such as Turček and local groundwater or springs, so the exact source for a given street can differ. The reported hardness is 70.1 mg/L CaCO₃, with measurements from 50.0 to 70.1 mg/L. Limescale appears gradually on taps and heating elements; occasional descaling keeps it in check.
Slovak suppliers report "Vápnik a horčík" in mmol/L; the recommended range is 1.1–5 mmol/L.
Water data
| Total hardness | 0.7 mmol/L |
|---|---|
| Utility | Stredoslovenská vodárenská prevádzková spoločnosť (StVPS) |
How Detva compares
- Tap water in Detva is 63 % softer than the median of the 1113 cities we track in Slovakia (1.9 mmol/L).
- By hardness it ranks 1026 of 1113 in Slovakia (1 = hardest); 7 % of these cities have softer water.
- In Banská Bystrica Region it is number 282 of 327 cities; the regional median is 1 mmol/L.
- Nearest city with clearly softer water: Hrochoť, 13 km away (0.35 mmol/L).
- Nearest city with clearly harder water: Očová, 11 km away (1 mmol/L).
Ranking of the hardest and softest water in Slovakia →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Detva
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 4 °dH |
| AEG / Electrolux | 2 |
| Beko | 1st |
| Hoover | S1 |
| LG | H1 |
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 Detva water hard or soft?
It is moderately hard: 70 mg/L as CaCO₃ (4.1 gpg, 3.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Detva safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Slovak suppliers report "Vápnik a horčík" in mmol/L; the recommended range is 1.1–5 mmol/L.
How many grains per gallon is Detva water?
4.1 gpg, equal to 3.9 °dH, 7 °fH or 70 mg/L calcium carbonate.
What dishwasher salt setting should I use in Detva?
For 70 mg/L (3.9 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Detva?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Stredoslovenská vodárenská prevádzková spoločnosť (StVPS) (2026). Method: figure published by the water supplier. Stredoslovenská vodárenská prevádzková spoločnosť (StVPS) · Outdated figure? Tell us