Water hardness in Poiana
29.5 °dH very hard
Tap water in Poiana is very hard: 29.5 °dH (527 mg/L · 30.8 gpg · 52.7 °fH).
Source: RAJA S.A. Constanța, Indicatori fizico-chimici ai apei potabile (OG 7/2023), valori medii 2026 (2026) · data checked 2026-11-05
RAJA S.A. Constanța lists Poiana in its 2026 table of average values (Ordonanța 7/2023) at 29.5 °dH, which is above 500 mg/L CaCO₃ and among the highest values in that table. The figure was checked against the printed calcium and magnesium values and approved on audit. The table does not name the water source; groundwater in Dobrogea is generally hard, and our audit notes link the locality to RAJA wells. Expect heavy limescale in kettles and water heaters.
Romanian operators report "duritate totală" in German degrees (grade germane); the minimum is 5 °dH.
Water data
| Total hardness | 29.5 °dH |
|---|---|
| Utility | RAJA S.A. Constanța |
How Poiana compares
- Tap water in Poiana is 81 % harder than the median of the 115 cities we track in Romania (16.3 °dH).
- By hardness it ranks 2 of 115 in Romania (1 = hardest); 99 % of these cities have softer water.
- Nearest city with clearly softer water: Măgura, 19 km away (15.4 °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 Poiana
| Brand | Setting for this water |
|---|---|
| Bosch | H06 |
| Miele | 30 °dH |
| AEG / Electrolux | 7 |
| Beko | 6th |
| Hoover | S4 |
| LG | H4 |
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 Poiana water hard or soft?
It is very hard: 527 mg/L as CaCO₃ (30.8 gpg, 29.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Poiana 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 Poiana water?
30.8 gpg, equal to 29.5 °dH, 52.7 °fH or 527 mg/L calcium carbonate.
What dishwasher salt setting should I use in Poiana?
For 527 mg/L (29.5 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Poiana?
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