Water hardness in Boiro
2.7 °fH soft
Tap water in Boiro is soft: 2.7 °fH (27 mg/L · 1.6 gpg · 1.5 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 15011 (2026-06) · data checked 2026-10-19
Range across supply zones: 11–27 mg/L.
For Boiro, SINAC (the Ministry of Health's water-supply system) records 27 mg/L CaCO₃, with readings from 11 to 27 mg/L as of June 2026, so it varies a lot with the supply point and the blend at the time. Galicia sits on granite and schist that dissolve poorly, and its water comes from rivers and upland sources with very little calcium and magnesium. 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 | 2.7 °fH |
|---|
How Boiro compares
- Tap water in Boiro is 87 % softer than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 4530 of 4988 in Spain (1 = hardest); 9 % of these cities have softer water.
- In Coruña (A) it is number 27 of 85 cities; the regional median is 2.1 °fH.
- Nearest city with clearly softer water: Illa de Arousa, A, 11 km away (1.6 °fH).
- Nearest city with clearly harder water: O Grove, 19 km away (4.8 °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 Boiro
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 2 °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 Boiro water hard or soft?
It is soft: 27 mg/L as CaCO₃ (1.6 gpg, 1.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Boiro 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 Boiro water?
1.6 gpg, equal to 1.5 °dH, 2.7 °fH or 27 mg/L calcium carbonate.
What dishwasher salt setting should I use in Boiro?
For 27 mg/L (1.5 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Boiro?
No. With soft water a softener adds nothing.
Source
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 15011 (2026-06). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 15011 · Outdated figure? Tell us