Where the Taste Actually Comes From

Tenerife South has almost no natural fresh water. The island relies almost entirely on desalination — seawater that's processed, mineralised and pumped to your tap. The process produces water that's legally safe, but the combination of high chlorine disinfection, a very high mineral content from the desalination process, and sometimes ageing local pipes produces water that most people describe as flat, heavy or slightly chemical.

Let's go through each one:

Chlorine — the swimming pool smell

Chlorine is added to kill bacteria during distribution. In the UK, the allowable limit is 0.5mg/L. In Tenerife, levels can be notably higher — particularly in summer when distribution networks are under more pressure. Chlorine is detectable by smell and taste at as little as 0.2mg/L. If your tap water smells like a pool, this is why. The good news is chlorine is one of the easiest things to remove with a water filter.

Dissolved minerals — the heavy, chalky taste

Tenerife's desalinated water has a TDS (total dissolved solids) reading of 500–600mg/L. This is almost entirely calcium, magnesium and sodium — not harmful, but very detectable. Water with this mineral load tastes noticeably heavier and less clean than soft water. It also leaves a film in your mouth and makes hot drinks — tea, coffee — taste less bright and more muted.

Desalination process characteristics

Reverse osmosis desalination removes almost everything from seawater. Minerals are then added back in to make it stable for distribution. This process, combined with the scale of production at Tenerife's plants, can leave subtle chemical characteristics that are nearly impossible to eliminate through simple carbon filtration alone.

Old pipework in the building

Once the water leaves the main supply, it travels through your building's internal pipes. Many older apartments in Tenerife South still have aged pipework — sometimes copper, sometimes older materials — that can add earthy, metallic or musty notes to what was already not particularly pleasant water. The further from the mains, the more likely this is to be a factor.

Glass of Tenerife tap water appearing cloudy — high mineral content and dissolved solids visible
Tenerife tap water held up to the light. The cloudiness is caused by dissolved minerals — calcium and magnesium — not contamination. But it's the same thing making it taste flat and heavy.

What's Actually In It

Here's how Tenerife tap water typically measures up across the key taste and quality indicators:

What's In It Typical Level Taste Effect Removed By Filter?
Chlorine High Swimming pool smell & aftertaste ✓ Carbon filter removes it
Calcium (hardness) Very high Heavy, chalky, muted flavour ✓ RO removes it / ✗ Carbon doesn't
Magnesium High Slightly bitter, flat finish ✓ RO removes it
Sodium Medium Faint saltiness in large quantities ✓ RO removes most
Total TDS 500–600 mg/L Overall heavy, unclean mouthfeel ✓ RO reduces to <20 mg/L
Trihalomethanes (THMs) Present Chemical / plasticky notes ✓ Carbon filter removes most

How Bad Taste Affects Daily Life

This isn't just a minor inconvenience. When your tap water tastes bad, it changes how you live:

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Coffee & Tea
High mineral water flattens the flavour of hot drinks. Coffee tastes dull. Tea loses its brightness. Switch to filtered water and you'll taste the difference immediately.
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Cooking
Pasta, rice, soups — anything cooked in water carries the mineral taste through. Many people in Tenerife use bottled water for cooking without realising filtered tap water would be cheaper and better.
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Hydration
When water doesn't taste good, you drink less of it. Many people are mildly under-hydrated in Tenerife's heat simply because they avoid the tap and forget to buy enough bottles.
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Ice
Ice made from Tenerife tap water smells of chlorine and tastes of minerals in every drink it melts into. Ice from filtered water is clear, neutral and doesn't affect your drinks.
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Kettle & Coffee Machine
The minerals in unfiltered water build up inside your kettle and coffee machine over weeks — affecting flavour, reducing efficiency, and shortening lifespan.
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Plastic Bottles
The average Tenerife household spends €30–40 a month on bottled water. That's €480/year — and the plastic waste adds up fast. A filter pays for itself in 10 months.
Safe isn't the same as good

The Spanish health authorities regularly confirm that Tenerife tap water is safe to drink — it meets EU standards for contaminants. But those standards don't address taste or the high mineral content that comes from desalination. Safe is the floor, not the ceiling. A filter lifts the ceiling.

How to Fix It

There are two routes, depending on how far you want to go:

Good Fix
Under-Sink Carbon Filter
€199
  • ✓ Removes chlorine and its smell completely
  • ✓ Removes chemical/THM taste compounds
  • ✓ Noticeably better-tasting water immediately
  • ✓ Dedicated tap fitted to your sink
  • ✗ Doesn't remove dissolved minerals (TDS)
Best for: renters, those mainly bothered by the chlorine smell
Complete Fix
Reverse Osmosis System
€399
  • ✓ Removes chlorine, chemicals and taste
  • ✓ Removes dissolved minerals (TDS drops from 500+ to <20)
  • ✓ Water tastes like premium still water
  • ✓ Remineralisation stage for balanced flavour
  • ✓ Saves €480/yr vs buying bottles
Best for: anyone who wants genuinely clean-tasting water on tap
Crystal clear filtered drinking water in a glass in Costa Adeje Tenerife — pure reverse osmosis water
The same tap water after reverse osmosis filtration — TDS reduced from 560mg/L to under 20mg/L. Clear, neutral and genuinely refreshing.

Questions People Ask Us

Will a filter make my tea and coffee taste better?
Yes — dramatically. The biggest factors affecting tea and coffee taste are chlorine and mineral content. A carbon filter removes the chlorine and immediately improves the taste of hot drinks. An RO system goes further, reducing the mineral content to near zero so the full flavour of the tea or coffee comes through unimpeded. Coffee enthusiasts with RO water consistently describe their home coffee as tasting notably better than before.
Is Tenerife water actually safe, or is the taste a warning sign?
The taste is not a safety warning. Tenerife tap water consistently meets EU drinking water standards and is confirmed safe by Spanish health authorities. The chlorine taste is actually evidence the water has been properly disinfected. The mineral taste comes from calcium and magnesium — not harmful at these levels. That said, "safe to drink" and "pleasant to drink" are very different bars, and a filter significantly closes the gap between them.
Why does the taste vary between different parts of Tenerife?
Water in different areas comes from different desalination plants and travels different distances through different pipe networks. Higher-altitude areas sometimes have access to spring or reservoir water blended with the desalinated supply, which can soften the taste slightly. South Tenerife tends to have the most heavily mineralised water because it's furthest from the northern mountain springs and most reliant on coastal desalination plants.
Does filtering the water affect its safety?
Not if the filter is properly maintained. Our systems include fresh filters on installation and we remind you when they're due for replacement. A filter that's changed on schedule removes taste and contaminants without introducing any new issues. The RO membrane itself is highly effective at removing bacteria as well as dissolved solids. Filters should be changed annually — we handle the reminder and the service.
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Ultra Pure Water Tenerife British-owned water filtration specialists. Based in Tenerife South, serving Costa Adeje, Los Cristianos, Arona, Playa de las Américas and surrounding areas.

Stop Putting Up With It

Better-tasting water is one WhatsApp message away. Tell us where you are and what's bothering you about the water, and we'll have a system installed within a day or two.

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Based in Tenerife South. Usually installed within 24–48 hours of enquiry.

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