Water hardness in Requena
34.9 °fH very hard
Tap water in Requena is very hard: 34.9 °fH (349 mg/L · 20.4 gpg · 19.6 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 46213 (2026-10) · data checked 2026-10-19
Range across supply zones: 246–595 mg/L.
SINAC data from the Ministry of Health for October 2026 put Requena at 349 mg/L CaCO₃, with readings from 246 to 595 mg/L, so it varies a lot with the supply point and the blend at the time. Tap water in Valencia province comes mainly from the Turia and Júcar basins and from local aquifers that run through limestone and marl rich in calcium and magnesium. This hardness forms limescale quickly in kettles, water heaters and washing machines; in a home, a softener is usually worth considering.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 34.9 °fH |
|---|
How Requena compares
- Tap water in Requena is 74 % harder than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 989 of 4988 in Spain (1 = hardest); 80 % of these cities have softer water.
- In Valencia/València it is number 138 of 250 cities; the regional median is 36 °fH.
- Nearest city with clearly softer water: Cofrentes, 21 km away (26.5 °fH).
- Nearest city with clearly harder water: Camporrobles, 26 km away (48.7 °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 Requena
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 20 °dH |
| AEG / Electrolux | 5 |
| Beko | 5th |
| Hoover | S3 |
| 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 Requena water hard or soft?
It is very hard: 349 mg/L as CaCO₃ (20.4 gpg, 19.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Requena 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 Requena water?
20.4 gpg, equal to 19.6 °dH, 34.9 °fH or 349 mg/L calcium carbonate.
What dishwasher salt setting should I use in Requena?
For 349 mg/L (19.6 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Requena?
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 46213 (2026-10). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 46213 · Outdated figure? Tell us