Why does my water taste metallic all of a sudden?

Metallic-tasting water usually indicates dissolved metals in your water supply, most commonly from aging pipes, water heater issues, or changes in your municipal water treatment. This can happen suddenly when pipe corrosion accelerates or your water's pH changes.

The most likely culprits in Ottawa homes are copper or galvanized steel pipes that have started corroding more rapidly. When water sits in these pipes for extended periods (like overnight), it can dissolve small amounts of metal. You'll often notice the metallic taste is strongest with the first water you draw in the morning. Iron from old galvanized pipes is another common source, sometimes accompanied by rusty-colored water.

Your water heater could also be the source, especially if the anode rod is failing or if sediment has built up in the tank. The metallic taste might be more noticeable with hot water if this is the case. In some instances, changes in the City of Ottawa's water treatment process can alter the water's pH, making it more corrosive to your home's plumbing.

Start by determining if the taste affects both hot and cold water and whether it's present at all taps or just specific ones. Run cold water for 30 seconds before drinking to flush out water that's been sitting in pipes. If the problem persists, you should have your water tested and your plumbing system inspected, as prolonged exposure to certain metals can be a health concern.

Contact a licensed plumber to assess your pipes and water heater - they can determine if pipe replacement or water heater service is needed. The City of Ottawa also provides water quality reports if you suspect a municipal supply issue.