If your skin feels tight and itchy after every shower — and your kettle is full of limescale — hard water could be part of the problem. Around 60% of households in England are in hard-water areas, particularly across London, the South East, East Anglia and the Midlands. Here's how hard water affects dry skin, and what you can realistically do about it.
What is hard water?
Hard water contains high levels of dissolved minerals, mainly calcium and magnesium, picked up as rainwater passes through rocks like chalk and limestone. It's perfectly safe to drink, but those minerals cause limescale on taps and kettles — and they can affect your skin too.
How hard water affects your skin
The minerals in hard water react with soap and many cleansers to form a sticky residue (soap scum) that's harder to rinse off and can be left on the skin. Research from UK universities has found that washing in hard water can damage the skin barrier and increase sensitivity to detergents, especially in people with eczema-prone skin. Hard water also tends to have a higher pH, which may disrupt the skin's naturally slightly acidic surface. Studies have linked living in hard-water areas with a higher risk of eczema in young children.
Do you live in a hard-water area?
Your water supplier publishes water hardness information — check their website using your postcode. As a rule of thumb, much of the South and East of England has hard to very hard water, while Scotland, Wales, Northern Ireland, the North West and South West of England tend to have softer water.
Practical fixes that help
- Switch to soap-free, gentle washes. Syndet (synthetic detergent) or emollient washes rinse more cleanly in hard water than traditional soap. See our best body wash for dry skin.
- Keep showers short and lukewarm, and rinse thoroughly to remove any residue.
- Moisturise within a minute of drying off with a fragrance-free cream — ideally one with ceramides to support the barrier. See our ceramides guide.
- Cleanse your face with micellar water or a cream cleanser you can tissue or wipe off, rather than lots of hard-water rinsing.
- Consider a filtering shower head. Some claim to reduce minerals or chlorine, though evidence for skin benefits is limited — look for independent test data.
- Use a non-bio, fragrance-free laundry detergent and rinse clothes well, as detergent residue can irritate dry skin.
Should you buy a water softener?
Whole-house ion-exchange water softeners remove calcium and magnesium and are the most effective option, but they're expensive to install and run. A large UK trial in children with eczema found that softened water alone didn't significantly improve eczema compared with usual care — though some families did notice benefits. For most people, gentle cleansing and diligent moisturising make more difference than the water itself. If you do install one, many plumbers recommend keeping a separate unsoftened tap for drinking water.
Frequently asked questions
Does hard water cause dry skin?
It can contribute. Minerals in hard water react with soap to leave a residue on the skin, and research suggests hard water can damage the skin barrier and increase sensitivity, especially in eczema-prone skin.
How do I protect my skin from hard water?
Use soap-free, gentle washes, keep showers short and lukewarm, rinse well and moisturise within a minute of drying. A ceramide moisturiser helps support the barrier.
Do water softeners help eczema?
A large UK trial found that installing a water softener didn't significantly improve eczema on its own, although some people notice a difference. Gentle washing and regular emollients remain the most important steps.
How do I know if I have hard water?
Check your water supplier's website with your postcode. Lots of limescale on kettles and taps, and soap that won't lather easily, are also good signs.
