By Done Wright Plumbing · Updated 2026-11-05
Sewer gas smells like rotten eggs and is both unpleasant and, in concentration, unsafe. Here is where it usually comes from.
A floor drain or guest bathroom that has not been used in weeks loses the water seal. Run water for a minute.
A rocking toilet lets gas escape at the base.
Leaves or nests in the roof vent push gas back through traps.
The most serious cause — needs a sewer camera inspection.
Bacteria in bathroom sink overflows and tub drains.
Gurgling plus smell means the main line is partially blocked. See sewer backup repair.
A loose lid on a basement ejector pump lets gas out.
If simple fixes do not clear the smell within a day, call Done Wright Plumbing. We locate the source and, if the sewer line is damaged, offer sewer line repair including trenchless options.
Sewage coming up through a tub, floor drain or toilet is a health hazard that needs a plumber now.
A sewer camera inspection shows exactly what is happening inside your pipes — roots, cracks, grease, offsets or bellies — so you only pay for the repair you need.
Cracked, root-invaded or collapsed sewer lines cause backups, soggy yards and sewage smells.
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