Water hardness in Oliva
30.6 °fH very hard
Tap water in Oliva is very hard: 30.6 °fH (306 mg/L · 17.9 gpg · 17.1 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 46181 (2026-02) · data checked 2026-10-19
Range across supply zones: 256–575 mg/L.
Much of the water in the Valencia area comes from the Júcar and Turia rivers via the Júcar-Turia canal, plus local wells. Official analyses put the water at 306 mg/L CaCO₃, very hard, with values between 256 and 575 mg/L. Scale on taps and shower screens is common, and water-heater elements foul sooner.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 30.6 °fH |
|---|
How Oliva compares
- Tap water in Oliva is 52 % harder than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 1367 of 4988 in Spain (1 = hardest); 72 % of these cities have softer water.
- In Valencia/València it is number 175 of 250 cities; the regional median is 36 °fH.
- Nearest city with clearly softer water: Alqueria de la Comtessa, l', 7 km away (20.4 °fH).
- Nearest city with clearly harder water: Bellreguard, 8 km away (38.9 °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 Oliva
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 17 °dH |
| AEG / Electrolux | 4 |
| 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 Oliva water hard or soft?
It is very hard: 306 mg/L as CaCO₃ (17.9 gpg, 17.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Oliva 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 Oliva water?
17.9 gpg, equal to 17.1 °dH, 30.6 °fH or 306 mg/L calcium carbonate.
What dishwasher salt setting should I use in Oliva?
For 306 mg/L (17.1 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Oliva?
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 46181 (2026-02). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 46181 · Outdated figure? Tell us