Water hardness in Predeal
6.5 °dH moderately hard
Tap water in Predeal is moderately hard: 6.5 °dH (116 mg/L · 6.8 gpg · 11.6 °fH).
Source: RAJA S.A. Constanța, Indicatori fizico-chimici ai apei potabile (OG 7/2023), valori medii 2026 (2026) · data checked 2026-10-29
Range across supply zones: 113–123 mg/L.
Romanian operators report "duritate totală" in German degrees (grade germane); the minimum is 5 °dH.
Water data
| Total hardness | 6.5 °dH |
|---|---|
| Utility | RAJA S.A. Constanța |
How Predeal compares
- Tap water in Predeal is 60 % softer than the median of the 115 cities we track in Romania (16.3 °dH).
- By hardness it ranks 107 of 115 in Romania (1 = hardest); 7 % of these cities have softer water.
- Nearest city with clearly softer water: Corbeanca, 107 km away (3 °dH).
- Nearest city with clearly harder water: Brasov, 17 km away (8.6 °dH).
Ranking of the hardest and softest water in Romania →
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 Predeal
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| 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 Predeal water hard or soft?
It is moderately hard: 116 mg/L as CaCO₃ (6.8 gpg, 6.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Predeal safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Romanian operators report "duritate totală" in German degrees (grade germane); the minimum is 5 °dH.
How many grains per gallon is Predeal water?
6.8 gpg, equal to 6.5 °dH, 11.6 °fH or 116 mg/L calcium carbonate.
What dishwasher salt setting should I use in Predeal?
For 116 mg/L (6.5 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Predeal?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: RAJA S.A. Constanța, Indicatori fizico-chimici ai apei potabile (OG 7/2023), valori medii 2026 (2026). Method: figure published by the water supplier. RAJA S.A. Constanța, Indicatori fizico-chimici ai apei potabile (OG 7/2023), valori medii 2026 · Outdated figure? Tell us