In the simplest terms, pH is a scale that tells you how acidic or alkaline (the opposite of acidic) a liquid is. Think of it as a little number line from 0 to 14, with 7 right in the middle being neutral. Pure water, in theory, sits at that perfect 7.
Anything below 7? That’s acidic territory—think lemon juice or stomach acid. Anything above 7? That’s alkaline, like baking soda or seawater. Your tap water usually hangs out somewhere between 6.5 and 8.5.
But why should you care? Because this invisible scale influences how your water tastes, how it reacts with soap, and even how it might feel on your skin.
