Water hardness in Mos
1.9 °fH soft
Tap water in Mos is soft: 1.9 °fH (19 mg/L · 1.1 gpg · 1 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 36033 (2026-09) · data checked 2026-10-19
Range across supply zones: 15–105 mg/L.
The hardness recorded in SINAC for Mos is 18.5 mg/L CaCO₃, with readings from 15 to 105 mg/L, based on September 2026 data, 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. At this level scale barely builds up on taps or appliances, and a softener is rarely worth installing.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 1.9 °fH |
|---|
How Mos compares
- Tap water in Mos is 91 % softer than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 4708 of 4988 in Spain (1 = hardest); 6 % of these cities have softer water.
- In Pontevedra it is number 22 of 46 cities; the regional median is 1.8 °fH.
- Nearest city with clearly softer water: Moaña, 13 km away (1 °fH).
- Nearest city with clearly harder water: O Porriño, 8 km away (6.6 °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 Mos
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 1 °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 Mos water hard or soft?
It is soft: 19 mg/L as CaCO₃ (1.1 gpg, 1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Mos 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 Mos water?
1.1 gpg, equal to 1 °dH, 1.9 °fH or 19 mg/L calcium carbonate.
What dishwasher salt setting should I use in Mos?
For 19 mg/L (1 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Mos?
No. With soft water a softener adds nothing.
Source
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 36033 (2026-09). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 36033 · Outdated figure? Tell us