The most common culprit is rust—specifically, iron and manganese from old water pipes. Think of your plumbing as a metal straw that’s been in a coffee cup for decades. When the city flushes the mains or a fire hydrant gets opened, those mineral deposits shake loose and turn your water a charming shade of amber.
This is usually harmless. You could drink it, bathe in it, and maybe even start a trend for “rust-water facials” (please don’t). The color is just a cosmetic issue, like a bad haircut that washes out with a little running time.
If the water clears after letting it run for a few minutes, you’ve solved the case. Congratulations, you’re now a certified water detective—no magnifying glass required.