Water hardness in Negru Vodă
13.4 °dH very hard
Tap water in Negru Vodă is very hard: 13.4 °dH (239 mg/L · 14 gpg · 23.9 °fH).
Source: RAJA S.A. Constanța, Indicatori fizico-chimici ai apei potabile (OG 7/2023), valori medii 2026 (2026) · data checked 2026-10-29
RAJA S.A. Constanța lists Negru Vodă in its 2026 table of average values (Ordonanța 7/2023) at 13.4 °dH. The table gives one value and no sampling month. Limescale will gather on taps and kettles, but more slowly than in the hardest localities of the same table.
Romanian operators report "duritate totală" in German degrees (grade germane); the minimum is 5 °dH.
Water data
| Total hardness | 13.4 °dH |
|---|---|
| Utility | RAJA S.A. Constanța |
How Negru Vodă compares
- Tap water in Negru Vodă is 18 % softer than the median of the 115 cities we track in Romania (16.3 °dH).
- By hardness it ranks 79 of 115 in Romania (1 = hardest); 32 % of these cities have softer water.
- Nearest city with clearly softer water: Sudiţi, 98 km away (9.4 °dH).
- Nearest city with clearly harder water: Albeşti, 17 km away (17.3 °dH).
Ranking of the hardest and softest water in Romania →
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 Negru Vodă
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 13 °dH |
| AEG / Electrolux | 3 |
| Beko | 4th |
| 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 Negru Vodă water hard or soft?
It is very hard: 239 mg/L as CaCO₃ (14 gpg, 13.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Negru Vodă 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 Negru Vodă water?
14 gpg, equal to 13.4 °dH, 23.9 °fH or 239 mg/L calcium carbonate.
What dishwasher salt setting should I use in Negru Vodă?
For 239 mg/L (13.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Negru Vodă?
Yes, unless you are only passing through: scale damages appliances within a few years.
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