The most common culprit is iron and manganese. These little metal particles are naturally in our soil and old pipes. When they get stirred up—say, by a fire hydrant test or a water main break—they turn your water into a rusty smoothie.
Think of it like shaking a snow globe, but with rust snowflakes. It looks awful, but it’s almost always harmless. Your laundry might get a bit dingy, though. Sorry about that.
Is it the City’s Fault or Mine?
That’s the million-dollar question. If you run only the cold water and it’s brown, the problem is likely in the city’s main pipes. It’s a system-wide shake-up. If only your hot water is brown? That’s your water heater having a mid-life crisis.
Hot water heaters rust from the inside out over time. That brown layer is sediment settling on the bottom. When you draw hot water, you’re basically a barista serving Rust-Infused Aqua. Try flushing your water heater—or call someone who knows how.
