Water hardness in Lasarte-Oria
5.7 °fH soft
Tap water in Lasarte-Oria is soft: 5.7 °fH (57 mg/L · 3.3 gpg · 3.2 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 20902 (2024-10) · data checked 2026-10-19
Range across supply zones: 55–58 mg/L.
SINAC data from the Ministry of Health for October 2024 put Lasarte-Oria at 56.5 mg/L CaCO₃, with readings from 55 to 58 mg/L. In the Basque Country water comes from reservoirs and springs on the Cantabrian side, with limestone and marl in the massifs and sandstone elsewhere; hardness runs from low to moderate. This is very soft water: it leaves almost no limescale, and home treatment is seldom needed.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 5.7 °fH |
|---|
How Lasarte-Oria compares
- Tap water in Lasarte-Oria is 72 % softer than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 4106 of 4988 in Spain (1 = hardest); 18 % of these cities have softer water.
- In Guipúzcoa it is number 76 of 86 cities; the regional median is 15.3 °fH.
- Nearest city with clearly softer water: Hernani, 6 km away (3.9 °fH).
- Nearest city with clearly harder water: Andoain, 5 km away (16.3 °fH).
Ranking of the hardest and softest water in Spain →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Lasarte-Oria
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 3 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
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 Lasarte-Oria water hard or soft?
It is soft: 57 mg/L as CaCO₃ (3.3 gpg, 3.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Lasarte-Oria 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 Lasarte-Oria water?
3.3 gpg, equal to 3.2 °dH, 5.7 °fH or 57 mg/L calcium carbonate.
What dishwasher salt setting should I use in Lasarte-Oria?
For 57 mg/L (3.2 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Lasarte-Oria?
No. With soft water a softener adds nothing.
Source
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 20902 (2024-10). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 20902 · Outdated figure? Tell us