Turning on the tap to discolored water is alarming. Sometimes it's harmless and temporary; other times it points to a problem. Here's how to read the color.
Brown or yellow water
Usually caused by rust or sediment. If it affects only hot water, your water heater tank is likely corroding. If it's all water and clears after running for a minute, it may be disturbed sediment in the municipal line — often after hydrant flushing or a water-main event.
Cloudy or milky water
Most often just air bubbles, which clear from the bottom of the glass up within seconds — harmless. If it doesn't clear, it could indicate other issues worth checking.
Reddish or orange water
Points to iron or rust, common in homes with older galvanized pipes. Persistent rust-colored water may mean it's time to consider repiping.
When to be concerned
If discoloration persists across all fixtures, returns repeatedly, or comes with an odd taste or smell, have your water and plumbing evaluated. A plumber can determine whether the cause is your water heater, your pipes, or the supply.
Pro Tip
If discolored water appears suddenly across your whole neighborhood, check with your water utility — it may be a temporary main issue that resolves on its own.
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