The Tenerife Water
is Wrecking Your Skin
and Hair. Here's Why.

What's Actually Happening

Tenerife's water comes almost entirely from desalination plants — seawater that's been processed and pumped to your taps. The process removes bacteria and makes it safe to drink, but it leaves behind a very high concentration of dissolved minerals, particularly calcium and magnesium. This is what we call hard water.

Tenerife consistently measures among the hardest tap water in Europe. TDS (total dissolved solids) readings regularly exceed 500mg/L in south Tenerife. For context, water above 200mg/L is considered hard. Above 400mg/L, the effects on skin, hair and appliances become very noticeable.

What Hard Water Does to Your Skin

When you shower in hard water, the dissolved calcium and magnesium react with the soap and body wash on your skin. Instead of rinsing cleanly away, they form a thin residue — sometimes called "soap scum" — that stays on your skin after you dry off.

This residue does several things. It blocks pores, it strips natural oils, and it interferes with your skin's moisture barrier. The result is skin that feels tight or rough after showering, dryness that comes back quickly no matter how much moisturiser you apply, and for some people, worsening eczema, psoriasis or general irritation.

What Hard Water Does to Your Hair

Hard water affects hair in two main ways. First, the calcium deposits build up on the hair shaft, making it feel coarse, heavy and harder to manage. Second, hard water interferes with the way shampoo and conditioner work — you need to use more, and they rinse out less cleanly.

Over weeks and months, you'll notice hair that looks dull rather than shiny, tangles more easily, and feels dry at the ends even if you're using good conditioner. Coloured hair fades faster — mineral deposits can literally strip colour. People with fine hair often notice increased breakage.

This is why hair stylists across Tenerife's expat community will often ask new clients "how long have you been here?" — they can usually tell from the state of the hair how long someone has been showering in Tenerife water.

Your Clothes and Towels

Hard water is rough on fabric. The mineral ions bond with laundry detergent and prevent it from rinsing out fully, leaving a residue in the fibres. This makes clothes feel stiff and scratchy (especially towels), causes colours to fade faster, and over time makes white fabrics go grey or yellow.

You'll also find you need more detergent to get the same clean — and even then, clothes don't smell as fresh. This is particularly noticeable with sports kit and light fabrics.

The Full Picture: Four Areas Hard Water Affects

The Fix — What Actually Works

There are a lot of "solutions" to hard water that don't really work — shower filters from Amazon, descaling tablets, lemon juice rinses. They might help slightly at the margin. But the only thing that genuinely fixes the problem is filtering the water before it comes out of your taps.

Which System Is Right For You

If your main concern is skin, hair and laundry, you want water filtered at source — which means a whole-house system. If you're primarily focused on drinking water quality, an under-sink reverse osmosis system is the smarter investment. For most households, we recommend a combination approach.

Questions We Get Asked

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