Water hardness in Zalău
6.2 °dH moderately hard
Tap water in Zalău is moderately hard: 6.2 °dH (110 mg/L · 6.4 gpg · 11 °fH).
Source: Compania de Apă Someş S.A. (CASSA), Buletin de calitate Zalău (Laborator Analize Apă Potabilă Zalău) (2026-06) · data checked 2026-10-22
The figure for Zalău, 6.17 °dH, comes from one of the five points in the city's water network (Şcoala Brădet), sampled on 2 June 2026 and reported by Compania de Apă Someş. It is not a citywide value, and the other four points may read differently. The bulletin sets no limit for hardness, so there is no compliance threshold to compare against. The bulletin does not name the water source, so we do not state one here. If scale matters at home, check the utility's latest bulletin for your district.
Romanian operators report "duritate totală" in German degrees (grade germane); the minimum is 5 °dH.
Water data
| Total hardness | 6.2 °dH |
|---|---|
| Utility | S.C. Compania de Apă Someş S.A. (CASSA), Sucursala Zalău |
How Zalău compares
- Tap water in Zalău is 62 % softer than the median of the 115 cities we track in Romania (16.3 °dH).
- By hardness it ranks 109 of 115 in Romania (1 = hardest); 5 % of these cities have softer water.
- Nearest city with clearly softer water: Târgu Mureș, 136 km away (4.1 °dH).
- Nearest city with clearly harder water: Turda, 90 km away (12.4 °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 Zalău
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 6 °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 Zalău water hard or soft?
It is moderately hard: 110 mg/L as CaCO₃ (6.4 gpg, 6.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Zalău 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 Zalău water?
6.4 gpg, equal to 6.2 °dH, 11 °fH or 110 mg/L calcium carbonate.
What dishwasher salt setting should I use in Zalău?
For 110 mg/L (6.2 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Zalău?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Compania de Apă Someş S.A. (CASSA), Buletin de calitate Zalău (Laborator Analize Apă Potabilă Zalău) (2026-06). Method: own measurement. Compania de Apă Someş S.A. (CASSA), Buletin de calitate Zalău (Laborator Analize Apă Potabilă Zalău) · Outdated figure? Tell us