The Correlation Between Hard Water and Eczema in Children

Jun 30, 2023

Eczema is a common skin condition characterized by inflammation, redness, itchiness, and dryness. It affects people of all ages but is particularly prevalent in children. The causes of eczema are varied but often include genetic predisposition, allergens, and other environmental factors. One potential factor that has been gaining attention is the correlation between hard water and eczema in children. Today we will explore the concept of hard water, delve into the relationship between hard water and eczema, and examine the available scientific evidence.


Understanding Hard Water

Before we delve into the correlation between hard water and eczema, let’s understand what hard water actually is. Hard water is water that contains a high concentration of minerals, primarily calcium, and magnesium ions. These minerals are naturally present in the earth’s crust and can dissolve in water as it travels through soil and rock formations. The hardness of water varies depending on the geological composition of the region.


The Relationship Between Hard Water and Eczema

While the precise mechanisms are not yet fully understood, some studies suggest that exposure to hard water may be linked to developing or worsening eczema in children. The theory behind this correlation lies in the potential impact of hard water on the skin’s barrier function and its ability to retain moisture.

  1. Disruption of the Skin Barrier:  Hard water has a higher mineral content, which can interact with the natural oils (sebum) present on the skin’s surface. This interaction may disrupt the delicate balance of the skin’s protective barrier, compromising its ability to retain moisture and leaving it vulnerable to irritants.
  2. Dryness and Irritation:  The minerals in hard water can react with soap and detergents, forming insoluble soap scum. This residue can remain on the skin after washing, potentially causing dryness and irritation while triggering eczema flare-ups in susceptible individuals.
  3. Altered Microbiome:  The skin’s microbiome, composed of various beneficial bacteria, plays a vital role in maintaining skin health. Some studies suggest that hard water may disrupt the balance of the skin’s microbiome, potentially worsening eczema symptoms.


Scientific Research on Hard Water and Eczema in Children

Several scientific studies have explored the association between hard water and eczema, although the findings have been somewhat inconsistent. Some studies have reported a positive correlation, indicating that hard water increases the risk of eczema, while others have found no significant relationship. It is important to note that research in this area is still ongoing, and further investigations are necessary to establish a conclusive link.


Practical Considerations

If you suspect that hard water may be contributing to your child’s eczema symptoms, there are several steps you can take to alleviate their symptoms:

  1. Water Softeners:  Installing a water softener system can help reduce the mineral content in water, thereby minimizing potential skin irritants.
  2. Moisturize Often:  Regularly moisturizing your child’s skin is crucial in managing eczema. Use emollients or moisturizers recommended by your dermatologist to help restore and maintain the skin’s moisture balance.
  3. Gentle Cleansing:  Opt for gentle, fragrance-free cleansers and soaps specifically formulated for sensitive skin. Avoid using excessive amounts of soap, and always rinse thoroughly to minimize any potential residue.
  4. Hydration:  Encourage your child to drink adequate water throughout the day to help maintain skin hydration from within.


While the correlation between hard water and eczema in children is a topic of ongoing research, evidence suggests that hard water may contribute to the development or aggravation of eczema symptoms. Understanding the impact of environmental factors, including water quality, is crucial in managing eczema effectively. RWI Water Systems provides a variety of water treatment services all over North County and is THE best way to treat hard water in California. Contact us today to get started.

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