Water hardness in Mairena del Alcor
12 °fH hard
Tap water in Mairena del Alcor is hard: 12 °fH (120 mg/L · 7 gpg · 6.7 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 41058 (2026-08) · data checked 2026-10-19
SINAC data from the Ministry of Health for August 2026 put Mairena del Alcor at 120 mg/L CaCO₃. This part of Seville province is supplied from regional reservoirs and, in some cases, wells; reservoir water tends to be soft to moderately hard, while well water is harder. Some scale shows on shower screens, kettles and taps, and a scale-reduction filter can be reasonable if you want to protect appliances.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 12 °fH |
|---|
How Mairena del Alcor compares
- Tap water in Mairena del Alcor is 40 % softer than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 3382 of 4988 in Spain (1 = hardest); 32 % of these cities have softer water.
- In Sevilla it is number 44 of 103 cities; the regional median is 11.8 °fH.
- Nearest city with clearly softer water: Arahal, 24 km away (9.2 °fH).
- Nearest city with clearly harder water: Villaverde del Río, 31 km away (38.8 °fH).
Ranking of the hardest and softest water in Spain →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Mairena del Alcor
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Mairena del Alcor water hard or soft?
It is hard: 120 mg/L as CaCO₃ (7 gpg, 6.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Mairena del Alcor 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 Mairena del Alcor water?
7 gpg, equal to 6.7 °dH, 12 °fH or 120 mg/L calcium carbonate.
What dishwasher salt setting should I use in Mairena del Alcor?
For 120 mg/L (6.7 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Mairena del Alcor?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 41058 (2026-08). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 41058 · Outdated figure? Tell us