Brown Water From Faucet: Is It Safe and How Do You Fix It?

By Rick Staley's Plumbing · Updated 2026-11-02 · Colorado plumbing guide

Hot only, cold only, or both?

• Hot water only: your water heater tank is rusting from the inside. The anode rod is spent. The tank will eventually leak.
• Cold only or both: rusty pipes in your home, or a disturbance in the city main (hydrant flushing, main break).
• One faucet only: the pipe feeding that fixture, or a corroded valve.

Is it safe?

Rust itself is not toxic, but brown water signals pipe deterioration. Discolored water can also carry sediment and bacteria from pipe scale. Run cold water 10–15 minutes; if it does not clear, call a plumber.

Permanent fixes

For a rusting water heater: replace the anode rod if caught early, or replace the heater. For galvanized pipe: whole-house repiping with PEX or copper ends the problem forever and restores pressure. For a corroding service line: water line replacement.

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