Brown water is mostly rust. Rust comes from old metal. Old metal lives in pipes. It’s the circle of plumbing life.
Most of the time, you can flush it out. If not, it’s a maintenance issue. You’re not poisoned. You’re just temporarily living in a sepia-toned novella.
Embrace the weirdness. Take a photo. Send it to your friend and say, “My tap is brewing tea.” They’ll laugh. Then you can both learn about iron particles.
And if all else fails? Buy bottled water for a day. Let your pipes sort themselves out. They usually do.