Water hardness in Jaca
19.5 °fH very hard
Tap water in Jaca is very hard: 19.5 °fH (195 mg/L · 11.4 gpg · 10.9 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 22130 (2026-09) · data checked 2026-10-19
Range across supply zones: 84–300 mg/L.
SINAC data from the Ministry of Health for September 2026 put Jaca at 195 mg/L CaCO₃, with readings from 84 to 300 mg/L, so it varies a lot with the supply point and the blend at the time. Jaca lies in the Pyrenees and receives water from mountain sources, though hardness varies with the source and the season. 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 | 19.5 °fH |
|---|
How Jaca compares
- Tap water in Jaca is close to the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 2563 of 4988 in Spain (1 = hardest); 49 % of these cities have softer water.
- In Huesca it is number 61 of 163 cities; the regional median is 16.3 °fH.
- Nearest city with clearly softer water: Castiello de Jaca, 8 km away (12.7 °fH).
- Nearest city with clearly harder water: Borau, 12 km away (25.7 °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 Jaca
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 11 °dH |
| AEG / Electrolux | 3 |
| Beko | 3rd |
| 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 Jaca water hard or soft?
It is very hard: 195 mg/L as CaCO₃ (11.4 gpg, 10.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Jaca 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 Jaca water?
11.4 gpg, equal to 10.9 °dH, 19.5 °fH or 195 mg/L calcium carbonate.
What dishwasher salt setting should I use in Jaca?
For 195 mg/L (10.9 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Jaca?
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 22130 (2026-09). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 22130 · Outdated figure? Tell us