You don’t need to be an expert to know that hard water can affect your hair. Notice how your locks feel different when you travel? It's because the quality of H2O varies from place to place, and harder water often contributes to hair damage, making it rougher and more brittle. It's fairly straightforward, water hardness depends on the amount of dissolved minerals—mainly calcium and magnesium.

Water starts as "soft," but when it flows through soil rich in these minerals, it becomes “hard.” So, if your water supply comes from the ground—be it a well, river, or lake—it likely contains some amount of calcium and magnesium. The more of these minerals, the harder your water.

I never realised how much the calcium in water could affect my hair until I moved from an area with hard water to one with softer water. Previously, my hair felt rough, dry, and frizzy after a . Now, with the softer water, my hair is smoother, more manageable, and less frizzy.

It turns out, the quality of water plays a big role in how healthy and shiny your hair is. The amount of calcium in your water can significantly impact your hair's health. Asun Pont, a trainer at Kérastase Spain, explains that hard water can make hair rough, brittle, and harder to manage.

“Hair tends to become visibly rougher and more brittle, difficult to comb, and stiffer to the touch. In addition, movement is reduced, which means a lack of vitality in the overall mane,” she says. Bleached, coloured, or straightened ha.