Water hardness in Tegueste
25.1 °fH very hard
Tap water in Tegueste is very hard: 25.1 °fH (251 mg/L · 14.7 gpg · 14.1 °dH).
Source: SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 38046 (2026-08) · data checked 2026-10-19
Range across supply zones: 68–335 mg/L.
SINAC, the Ministry of Health's drinking-water register, reports 251 mg/L CaCO₃ for Tegueste, very hard, with a wide range from 68 to 335 mg/L. Towns across northern Tenerife run from 109 to 331 mg/L, and the record does not name the sources. Scale builds up on kettles and heaters, and the actual value depends on your supply.
Fuentes españolas usan °fH (grados hidrotimétricos franceses) o mg/L CaCO₃.
Water data
| Total hardness | 25.1 °fH |
|---|
How Tegueste compares
- Tap water in Tegueste is 25 % harder than the median of the 4988 cities we track in Spain (20.1 °fH).
- By hardness it ranks 1981 of 4988 in Spain (1 = hardest); 60 % of these cities have softer water.
- In Santa Cruz de Tenerife it is number 3 of 48 cities; the regional median is 10 °fH.
- Nearest city with clearly softer water: San Cristóbal de La Laguna, 4 km away (19.9 °fH).
- Nearest city with clearly harder water: Victoria de Acentejo, La, 15 km away (33.1 °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 Tegueste
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 14 °dH |
| AEG / Electrolux | 3 |
| Beko | 4th |
| Hoover | S2 |
| 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 Tegueste water hard or soft?
It is very hard: 251 mg/L as CaCO₃ (14.7 gpg, 14.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Tegueste 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 Tegueste water?
14.7 gpg, equal to 14.1 °dH, 25.1 °fH or 251 mg/L calcium carbonate.
What dishwasher salt setting should I use in Tegueste?
For 251 mg/L (14.1 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Tegueste?
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 38046 (2026-08). Method: own measurement. SINAC, Ministerio de Sanidad — Información de un abastecimiento, municipio 38046 · Outdated figure? Tell us