Floor Drain Odors: Causes and Fixes

Unpleasant smells near a floor drain are more than an annoyance—they can signal a plumbing problem that allows sewer gas to escape indoors. While some causes are simple to correct, others may require a plumber, especially if the odor returns quickly or is accompanied by slow drains or gurgling.

Below are the most common reasons floor drains develop odors and practical steps to eliminate the smell and reduce the chance it comes back.