Water hardness in Daimiel
42 °fH very hard
Tap water in Daimiel is very hard: 42 °fH (420 mg/L · 24.5 gpg · 23.5 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 13039 (2026-09) · data checked 2026-10-19
Range across supply zones: 402–437 mg/L.
For Daimiel, SINAC (the Ministry of Health's water-supply system) records 419.5 mg/L CaCO₃, with readings from 402 to 437 mg/L as of September 2026. In this part of Castilla-La Mancha the water comes from aquifers in limestone and gypsum and, in some cases, from pipelines from distant reservoirs, hence very high hardness. 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 | 42 °fH |
|---|
How Daimiel compares
- Tap water in Daimiel is 109 % harder than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 548 of 4988 in Spain (1 = hardest); 89 % of these cities have softer water.
- In Ciudad Real it is number 16 of 84 cities; the regional median is 28.1 °fH.
- Nearest city with clearly softer water: Torralba de Calatrava, 14 km away (29.1 °fH).
- Nearest city with clearly harder water: Labores, Las, 16 km away (74.8 °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 Daimiel
| Brand | Setting for this water |
|---|---|
| Bosch | H06 |
| Miele | 24 °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 Daimiel water hard or soft?
It is very hard: 420 mg/L as CaCO₃ (24.5 gpg, 23.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Daimiel 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 Daimiel water?
24.5 gpg, equal to 23.5 °dH, 42 °fH or 420 mg/L calcium carbonate.
What dishwasher salt setting should I use in Daimiel?
For 420 mg/L (23.5 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Daimiel?
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 13039 (2026-09). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 13039 · Outdated figure? Tell us