Brown or Rusty Water From Your Faucet? Causes and What to Do About It

Turn on the tap and get a glass of brown water, and your first thought is probably panic. The good news: most causes of discolored water are diagnosable in a few minutes, and many are harmless. The bad news: one of them means your pipes are literally rusting from the inside out.

Here is how to read what your water is telling you — and what to do about each cause.

1. 🚿 First Test: Hot, Cold, or Both?

Run the cold tap for 30 seconds. Then run the hot tap separately. This single test narrows the field dramatically:

• Cold only: the problem is in your supply pipes or the municipal main.
• Hot only: the problem is inside your water heater — usually sediment or a failing anode rod.
• Both: corroded pipes or a disturbed municipal supply.

2. 🏗️ Municipal Work and Sediment Disturbances

If the whole neighborhood has brown water, or it started right after nearby construction or hydrant flushing, sediment got stirred up in the city main. This is the most harmless cause.

Run the cold tap closest to where water enters your home for 5–10 minutes. If it clears, you are done. If it does not clear within a day, the problem is on your side of the meter.

3. 🔩 Corroded Galvanized Steel Pipes

Homes built before the 1970s often have galvanized steel supply pipes, and in coastal Florida the salty air and mineral-heavy water accelerate their decay. From the inside, these pipes rust, flake, and narrow — sending brown water to your taps and eventually restricting flow to a trickle.

Tell-tale signs: brown water that is worse in the morning (after sitting in pipes overnight), declining water pressure, and visible corrosion on exposed pipes. Galvanized pipe does not get better — it only gets worse. If this is your diagnosis, read our guide to whole-house repiping in Oakland Park to understand your options.

4. 🔥 Rust Inside Your Water Heater

Hot-water-only discoloration points at the tank. Sediment builds up on the tank floor over years, and once the glass lining cracks, the steel tank itself starts rusting.

Drain a bucket from the heater's drain valve. If the water is rusty and full of sediment, a flush and anode rod check may buy time — but a rusting tank is a dying tank. Plan for replacement before it fails and floods.

5. 💧 Iron in Well Water

Well owners deal with a different culprit: dissolved iron and manganese that oxidize into rust-colored water. It stains fixtures orange, tastes metallic, and ruins laundry.

If you are on a well, test your water before assuming the pipes are bad. Iron filtration or a water softener usually solves it — see our article on hard water effects for related treatment options.

6. ⚠️ When Brown Water Means Call a Plumber

Call a professional when: discoloration persists more than 24 hours, pressure is dropping alongside the color change, you see active leaks or hidden leak signs, or your home has galvanized pipes and the brown water keeps coming back.

Rusty water from aging pipes is a progressive problem. Every month you wait, the corrosion advances — and the eventual repipe gets more urgent and more expensive. An inspection now gives you time to plan instead of reacting to a burst pipe later.