Water hardness in Llanes
11.3 °fH moderately hard
Tap water in Llanes is moderately hard: 11.3 °fH (113 mg/L · 6.6 gpg · 6.3 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 33036 (2026-09) · data checked 2026-10-19
Range across supply zones: 11–219 mg/L.
SINAC, the Ministry of Health's drinking-water register, reports 113 mg/L CaCO₃ for Llanes, moderately hard, with values between 11 and 219 mg/L. That wide spread suggests different supply points; eastern Asturias has limestone areas near the coast, which may explain the upper end, though the record does not name the sources. Check the figure for your own street or village before buying any treatment.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 11.3 °fH |
|---|
How Llanes compares
- Tap water in Llanes is 44 % softer than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 3458 of 4988 in Spain (1 = hardest); 31 % of these cities have softer water.
- In Asturias it is number 26 of 49 cities; the regional median is 11.5 °fH.
- Nearest city with clearly softer water: Ruente, 48 km away (0.9 °fH).
- Nearest city with clearly harder water: Ribadedeva, 19 km away (16.3 °fH).
Ranking of the hardest and softest water in Spain →
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 Llanes
| 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 Llanes water hard or soft?
It is moderately hard: 113 mg/L as CaCO₃ (6.6 gpg, 6.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Llanes 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 Llanes water?
6.6 gpg, equal to 6.3 °dH, 11.3 °fH or 113 mg/L calcium carbonate.
What dishwasher salt setting should I use in Llanes?
For 113 mg/L (6.3 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Llanes?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 33036 (2026-09). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 33036 · Outdated figure? Tell us