Water hardness in Puerto del Rosario
4.6 °fH soft
Tap water in Puerto del Rosario is soft: 4.6 °fH (46 mg/L · 2.7 gpg · 2.6 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 35017 (2026-02) · data checked 2026-10-19
Tap water is mostly seawater desalinated by reverse osmosis, blended with some well and gallery water. The figure of 45.6 mg/L CaCO₃ (soft) is computed from published analyses. Appliances gather little scale; it is enough to dose detergent sensibly.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 4.6 °fH |
|---|
How Puerto del Rosario compares
- Tap water in Puerto del Rosario is 77 % softer than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 4232 of 4988 in Spain (1 = hardest); 15 % of these cities have softer water.
- In Palmas (Las) it is number 26 of 30 cities; the regional median is 7.1 °fH.
- Nearest city with clearly softer water: Tuineje, 32 km away (3 °fH).
- Nearest city with clearly harder water: Antigua, 18 km away (7.5 °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 Puerto del Rosario
| 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 Puerto del Rosario water hard or soft?
It is soft: 46 mg/L as CaCO₃ (2.7 gpg, 2.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Puerto del Rosario 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 Puerto del Rosario water?
2.7 gpg, equal to 2.6 °dH, 4.6 °fH or 46 mg/L calcium carbonate.
What dishwasher salt setting should I use in Puerto del Rosario?
For 46 mg/L (2.6 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Puerto del Rosario?
No. With soft water a softener adds nothing.
Source
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 35017 (2026-02). Method: computed from supplier's calcium and magnesium. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 35017 · Outdated figure? Tell us