Water hardness in Vila-seca
27.5 °fH very hard
Tap water in Vila-seca is very hard: 27.5 °fH (275 mg/L · 16.1 gpg · 15.4 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 43171 (2026-05) · data checked 2026-10-19
The hardness recorded in SINAC for Vila-seca is 275 mg/L CaCO₃, based on May 2026 data. On the Tarragona coast supply combines local sources with Ebro water; the river and the aquifers cross limestone and gypsum-bearing ground, which gives hard water. This is hard water: it leaves white marks on fittings and appliances need descaling fairly often.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 27.5 °fH |
|---|
How Vila-seca compares
- Tap water in Vila-seca is 37 % harder than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 1705 of 4988 in Spain (1 = hardest); 66 % of these cities have softer water.
- In Tarragona it is number 145 of 181 cities; the regional median is 35.4 °fH.
- Nearest city with clearly softer water: Riudecanyes, 17 km away (19.5 °fH).
- Nearest city with clearly harder water: Canonja, La, 4 km away (43.3 °fH).
Ranking of the hardest and softest water in Spain →
What it means at home
- Severe scale: heater elements and washing-machine heaters fail early.
- Detergent use is very high; taps and screens coat within days.
- Dishwasher at maximum salt setting.
- An ion-exchange softener is practically essential; RO for drinking water.
How much salt will you use for softening?
Yes. At this hardness a softener pays for itself through appliance life and detergent.
Descale a coffee machine or kettle about every 1 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Vila-seca
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 15 °dH |
| AEG / Electrolux | 4 |
| Beko | 4th |
| Hoover | S2 |
| LG | H3 |
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 Vila-seca water hard or soft?
It is very hard: 275 mg/L as CaCO₃ (16.1 gpg, 15.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Vila-seca 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 Vila-seca water?
16.1 gpg, equal to 15.4 °dH, 27.5 °fH or 275 mg/L calcium carbonate.
What dishwasher salt setting should I use in Vila-seca?
For 275 mg/L (15.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Vila-seca?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 43171 (2026-05). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 43171 · Outdated figure? Tell us