Hard Water and Skin

How Hard Water Affects Your Skin

Hard water contains high levels of dissolved calcium and magnesium. When you wash with hard water, these minerals react with soap to form soap scum — a sticky residue that's difficult to rinse away completely. This residue sits on your skin, clogging pores and stripping away natural oils.

The result is drier, tighter skin that's more prone to irritation. For people with sensitive skin or existing conditions like eczema, dermatitis, or psoriasis, hard water can significantly worsen symptoms.

The Research: Hard Water and Eczema

The link between hard water and eczema is well-established in clinical research:

• A study in the Journal of Investigative Dermatology (2017) found that washing with hard water damages the skin barrier function, even in people without eczema
• Research by the University of Sheffield showed that calcium and magnesium in hard water increase the sensitivity of skin to irritants like sodium lauryl sulphate (found in most soaps and shampoos)
• The Journal of Allergy and Clinical Immunology (2018) reported that children living in hard water areas are up to 87% more likely to develop eczema by age one
• A University of Nottingham study of over 7,500 schoolchildren found a clear geographical correlation between water hardness and eczema prevalence

Symptoms of Hard Water Skin Damage

If your area has hard water (above 200 ppm), you may recognise some of these symptoms:

• Persistent dryness, especially after bathing or showering
• Tight, uncomfortable feeling on the skin
• Eczema flare-ups, particularly on hands, arms, and face
• Redness and irritation that doesn't respond well to moisturisers
• Clogged pores and increased breakouts
• Skin that feels "squeaky" rather than smooth after washing

Solutions for Hard Water Skin Problems

1. Shower Filter

A shower filter is the most accessible first step. It removes chlorine (a known skin irritant) and reduces some mineral content. Most people notice softer skin within 1-2 weeks of installing one. They're inexpensive and require no plumbing changes.

2. Emollient-Based Washing

Switch from regular soap and shower gel to soap-free emollient wash products. These don't react with hard water minerals to form soap scum, so they rinse cleanly. Dermatologists recommend products like Dermol 500, Cetraben, or QV Wash.

3. Moisturise Immediately After Bathing

Apply a ceramide-based, fragrance-free moisturiser within 3 minutes of bathing, while your skin is still slightly damp. This locks in moisture before the mineral residue from hard water can dry the skin further.

4. Water Softener

A whole-house water softener is the most effective long-term solution. By removing calcium and magnesium from the water supply entirely, it eliminates the root cause of hard water skin problems. Many eczema sufferers report dramatic improvement after installing a softener.

5. Shorter, Cooler Showers

Hot water strips natural oils from the skin faster than cool water. In hard water areas, keeping showers under 10 minutes and using warm (not hot) water can reduce skin dryness and irritation.

Hard Water and Children's Skin

Children's skin is thinner and more permeable than adults', making them more vulnerable to hard water damage. If you live in a hard water area and your child has eczema or sensitive skin, consider using filtered or softened water for bathing, and always use soap-free wash products.

Check your postcode to see how hard your water is. You can also read more about all the effects of hard water or explore solutions for your home.

Recommended Products for Skin in Hard Water Areas

These are the products most commonly recommended by dermatologists and hard water area residents: