Look inside your kettle or coffee maker. See that white, chalky build-up? That’s scale, and it’s hard water’s calling card. When you heat hard water, the calcium and magnesium minerals solidify and stick to surfaces. It’s basically the water’s version of a mineral fossil.
Water Hardness Test Methods - Testex
If your showerhead looks like it’s been dusted with powder, or your faucets have white rings, you’ve got a classic case of hard water. Fun fact: this same scale can clog pipes over time. Your plumbing is low-key complaining, but you just didn’t know it.
