Although tap water filters have become ubiquitous due to the growing awareness of contaminants in our supply – everything from microplastics and hormone residues to trace pharmaceuticals and volatile organic compounds – some people would never think twice about stepping under the shower.

After all, showering gets you clean, no?

Although shower head filters remain something of a niche purchase, there are many valid reasons why you might wish to install one – particularly if you value the appearance of your hair and skin.