If your water is always brown or smells like bleach-poop hybrid—call your local water department. They test it for free. Or hire a certified plumber. They’ll use shiny gadgets and make you feel fancy.
Also, if your water leaves blue-green stains on your sink? That’s copper. Too much can make you sick. Get it tested by a lab—they’ll send a report with big words.
How to Test Water Quality at Home: Your Complete Guide – World Water