Water hardness in Amposta
45.4 °fH very hard
Tap water in Amposta is very hard: 45.4 °fH (454 mg/L · 26.5 gpg · 25.4 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 43014 (2026-02) · data checked 2026-10-19
The hardness recorded in SINAC for Amposta is 454 mg/L CaCO₃, based on February 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. With water this hard, scale shortens the life of heating elements and hot-water pipes and often justifies treatment at home.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 45.4 °fH |
|---|
How Amposta compares
- Tap water in Amposta is 126 % harder than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 394 of 4988 in Spain (1 = hardest); 92 % of these cities have softer water.
- In Tarragona it is number 42 of 181 cities; the regional median is 35.4 °fH.
- Nearest city with clearly softer water: Freginals, 8 km away (32 °fH).
- Nearest city with clearly harder water: Prat de Comte, 33 km away (87.6 °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 Amposta
| Brand | Setting for this water |
|---|---|
| Bosch | H06 |
| Miele | 25 °dH |
| AEG / Electrolux | 6 |
| Beko | 6th |
| Hoover | S3 |
| LG | H4 |
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 Amposta water hard or soft?
It is very hard: 454 mg/L as CaCO₃ (26.5 gpg, 25.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Amposta 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 Amposta water?
26.5 gpg, equal to 25.4 °dH, 45.4 °fH or 454 mg/L calcium carbonate.
What dishwasher salt setting should I use in Amposta?
For 454 mg/L (25.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Amposta?
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 43014 (2026-02). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 43014 · Outdated figure? Tell us