There are few things more alarming for a homeowner than turning on the kitchen faucet to fill a glass of water, only to see a murky, brownish-red stream swirling in the sink. 

If you’ve encountered “rust-coloured” water in your home, you aren’t alone. While it’s a common issue in Ontario, it’s one that needs to be addressed immediately to protect your plumbing and your family’s health.

Here is a breakdown of why your water might be changing colour and the steps you can take to fix it.

Why Is My Water Brown or Rusty?

Discoloured water is usually a sign that iron, rust, or sediment has entered your water supply. To fix the problem, you first need to identify the source.

1. Corroded or Aging Pipes

If your home was built before the 1970s, it may still have galvanized steel or iron pipes. Over decades, these pipes corrode from the inside out. Bits of rust can flake off and mix with your water, especially if the water has been sitting in the pipes for a while.

• The Tell-Tale Sign: The brown water only appears at one or two specific taps and clears up after running the water for a minute or two.

2. Sediment Buildup in the Water Heater

Does the brown water only appear when you turn on the hot tap? If so, the culprit is likely your water heater. Over time, minerals like calcium and magnesium (common in Ontario’s hard water) settle at the bottom of the tank. This sediment can stir up and enter your hot water lines.

• The Solution: Annual water heater flushing is essential to remove this buildup and extend the life of your appliance.

3. Municipal Water Main Issues

Sometimes the problem isn’t inside your house at all. If the city is flushing hydrants, repairing a water main nearby, or if there is a sudden change in water pressure, sediment from the city’s aging infrastructure can be stirred up and sent toward your home.

• The Tell-Tale Sign: All the taps in your house are affected, and your neighbours are likely seeing the same thing.

4. Recent Plumbing Work

If you recently had a repair done or a new fixture installed, the vibration and pressure changes can temporarily knock loose old rust deposits within your system. This usually clears up quickly.

Is Brown Water Safe?

In short: Don’t drink it.

While iron isn’t necessarily toxic at low levels, brown water can be a “red flag” for other contaminants. Until the water runs clear:

• Avoid Drinking or Cooking: Use bottled water or a high-quality filtration system.
• Skip the Laundry: Washing whites in rusty water is a guaranteed way to ruin your clothes with permanent orange stains.
• Protect Pets and Kids: It’s best to avoid bathing young children or pets until the source is identified.

What to Do Immediately

1. Run the Cold Water: Go to the tap closest to where your water line enters the house. Run the cold water for 10–15 minutes. Do not use the hot water during this time, as you don’t want to pull sediment into your water heater.
2. Check with Neighbours: A quick text can tell you if it’s a localized plumbing issue or a municipal problem.
3. Inspect Your Fixtures: Check for signs of leaks or external corrosion on your visible pipes.

Long-Term Solutions

If brown water is a recurring nightmare, it’s time to look at permanent solutions:

• Whole-Home Water Softeners: Ontario is known for hard water. A softener removes the minerals that cause scale and sediment buildup in your heater and pipes, preventing rust from being trapped in the first place.
• Reverse Osmosis (RO) Systems: For the ultimate peace of mind, an RO system acts as a final gatekeeper, filtering out 99% of impurities, including rust, lead, and bacteria.
• Pipe Replacement: If your old galvanized pipes are failing, upgrading to PEX or copper is the only permanent fix to stop internal corrosion.

Call the Pros at Mr. Rooter

Dealing with discoloured water can be stressful. Whether you need a professional water heater flush, a pipe inspection, or the installation of a new filtration system, the experts at Mr. Rooter are here to help.

Don’t settle for “dirty” water. Contact us today to get your home’s plumbing back to crystal clear!

With hundreds of locations across Canada and the U.S, Mr. Rooter Plumbing® proudly serves homeowners and businesses through a trusted network of independently owned and operated locations. Guided by a shared set of values, our team is committed to delivering reliable plumbing solutions and the best customer service possible.

Follow us on Facebook and Instagramfor plumbing tips, expert advice, and the latest promotions.