Water hardness in O Grove
4.8 °fH soft
Tap water in O Grove is soft: 4.8 °fH (48 mg/L · 2.8 gpg · 2.7 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 36022 (2026-02) · data checked 2026-10-19
Range across supply zones: 29–66 mg/L.
SINAC, the Ministry of Health's drinking-water register, reports 47.6 mg/L CaCO₃ for O Grove, soft, with values between 29 and 66.2 mg/L. Towns around the Arousa estuary are mostly much softer, from 6.6 to 26 mg/L, in line with the area's granite. Scale is light, though the top of the range is noticeably harder.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 4.8 °fH |
|---|
How O Grove compares
- Tap water in O Grove is 76 % softer than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 4198 of 4988 in Spain (1 = hardest); 16 % of these cities have softer water.
- In Pontevedra it is number 6 of 46 cities; the regional median is 1.8 °fH.
- Nearest city with clearly softer water: Cambados, 7 km away (1.5 °fH).
- Nearest city with clearly harder water: Pazos de Borbén, 36 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 O Grove
| 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 O Grove water hard or soft?
It is soft: 48 mg/L as CaCO₃ (2.8 gpg, 2.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in O Grove 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 O Grove water?
2.8 gpg, equal to 2.7 °dH, 4.8 °fH or 48 mg/L calcium carbonate.
What dishwasher salt setting should I use in O Grove?
For 48 mg/L (2.7 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in O Grove?
No. With soft water a softener adds nothing.
Source
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 36022 (2026-02). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 36022 · Outdated figure? Tell us