Water hardness in Unión, La
23.1 °fH very hard
Tap water in Unión, La is very hard: 23.1 °fH (231 mg/L · 13.5 gpg · 12.9 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 30041 (2026-09) · data checked 2026-10-19
Range across supply zones: 210–252 mg/L.
For La Unión, SINAC (the Ministry of Health's water-supply system) records 231 mg/L CaCO₃, with readings from 210 to 252 mg/L as of September 2026. Supply in the Murcia region relies on the Mancomunidad de los Canales del Taibilla, which blends water from the Taibilla river, the Tajo-Segura transfer and desalination plants, along with local sources. Scale builds up regularly in kettles, taps and the washing-machine heating element, so they need frequent cleaning.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 23.1 °fH |
|---|
How Unión, La compares
- Tap water in Unión, La is 15 % harder than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 2180 of 4988 in Spain (1 = hardest); 56 % of these cities have softer water.
- In Murcia it is number 31 of 45 cities; the regional median is 24.9 °fH.
- Nearest city with clearly softer water: Cartagena, 5 km away (17.9 °fH).
- Nearest city with clearly harder water: Alcantarilla, 52 km away (34 °fH).
Ranking of the hardest and softest water in Spain →
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 Unión, La
| 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 Unión, La water hard or soft?
It is very hard: 231 mg/L as CaCO₃ (13.5 gpg, 12.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Unión, La safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
How many grains per gallon is Unión, La water?
13.5 gpg, equal to 12.9 °dH, 23.1 °fH or 231 mg/L calcium carbonate.
What dishwasher salt setting should I use in Unión, La?
For 231 mg/L (12.9 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Unión, La?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 30041 (2026-09). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 30041 · Outdated figure? Tell us