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Plumbing guide
Sewer Smell in the House in Goodyear, AZ: Causes and Fixes
A sewer smell indoors is not just unpleasant. It means gases from the drain system are finding a way into the house. Most causes are simple, a few are not.
By the Goodyear Express Plumbing team ·
Where the smell is strongest
Walk the house and note where the odor is worst. A bathroom, a laundry area, a garage floor drain or one corner of the yard each point to different causes. The smell near a single drain points at that drain. A smell that follows you through the house suggests a vent or a main line issue.
Notice when it happens too. After running water, after a flush, on hot afternoons or after a rain are all clues.
Dry traps
Each drain has a curved trap that holds water and blocks gas. In a guest bathroom, a laundry drain or a garage floor drain that goes unused, that water can dry out. Arizona's dry heat speeds this. Pour a quart of water into the drain and the smell often disappears within minutes.
For a drain you use rarely, repeat monthly and add a thin film of cooking oil to slow evaporation.
Odor location and likely source
Match where the smell is strongest to the cause.
| Strongest at | Probable source | Try |
|---|---|---|
| A single drain | Dried-out trap | Pour in a quart of water |
| Base of a toilet | Worn wax seal | Check the seal and flange |
| Everywhere | Vent or main line trouble | Book an inspection |
| Hot water only | Bacteria in the heater | Flush or service the heater |
Toilet seals and wax rings
A toilet that rocks, or leaves a damp ring around its base, may have a failed wax seal on the floor flange. Gas then leaks into the room. Replacing the seal is a small repair. See toilet repair and installation for what a visit covers.
A cracked bowl or a loose flange can cause the same smell, so check that the toilet sits firm.
Vents and the roof
Plumbing vents let air into the system so water drains smoothly and they carry gas to the roof. A blocked vent, from a bird nest or debris, can pull water out of traps and push gas into the house. Gurgling drains are a warning.
Roof access is a job for a professional. Tell the dispatcher about gurgling and smells together.
Cracks, breaks and the main line
A cracked or broken sewer pipe under the house or in the yard can leak gas and sewage. Soft, wet ground, lush spots in the yard and slow drains in several fixtures add to the evidence. A sewer camera inspection shows what is inside the line.
If the pipe is broken, sewer line repair or replacement may be needed.
Rotten egg versus sewage
Rotten egg odor can also come from a water heater with bacteria in the tank, from hot water only. Natural gas has a sulfur like additive too. If you smell gas, leave the building and call 911 or the gas utility from outside before anything else.
If the smell is only in hot water, the heater is the likely source, and a plumber can flush it or replace the anode.
Quick steps while you wait
Run water in every drain, close toilet lids, open windows and use a fan. Clean the floor drain strainer. Do not mix cleaning chemicals, since bleach and ammonia produce harmful fumes.
If the smell comes with a backup, stop using fixtures and call right away. A sewage backup is a health risk, and anything it touches may need professional cleaning.
When to call a plumber
Call if the smell lingers after you refill traps, if it follows gurgling or slow drains, or if you see wet yard patches. Report where it is strongest and when it is worst. That helps decide between a trap, a vent, a seal or a line problem before the truck is on the way.
Home habits that cause odor
Garbage disposals with food residue, unused bathrooms and laundry drains, and a dishwasher that is never run can all produce smell. A bathroom sink overflow hole collects film. Pouring a mix of baking soda and vinegar slowly into the overflow loosens it.
Clean the disposal with ice and citrus peels and run cold water for thirty seconds.
Smell outside the house
A sewer smell in the yard may come from a vent, a cleanout cap that is missing or a broken lateral. Check that every cleanout has a tight cap. A smell at a manhole in the street is the city's concern; tell your provider.
If the smell is strongest near a planter or a patch of lush grass, the pipe under it may be leaking.
Septic and special cases
Homes on septic tanks may smell when the tank is full or the vent is blocked. Homes with a sump or a pump station can smell when the pump fails. Mention these features when you call so the right person is sent.
New construction can also smell if a trap was never primed. Run every drain after move in.
Keeping your family safe
Strong sewer gas contains compounds that irritate the eyes and lungs. Ventilate the house, keep children and pets away from the source and avoid mixing cleaners. If anyone feels dizzy or sick, leave and call for help.
A persistent smell deserves a professional look. See sewer camera inspection for how a line is examined.
Documenting the odor
Keep notes on when the smell is strongest, which windows were open and which fixtures were in use. Photos of any wet spots or stains help. If you call, those details speed up the diagnosis and avoid a second visit.
Preventive habits
Run water in infrequently used drains weekly, keep cleanout caps tight and clean the disposal regularly. Replace old wax rings when a toilet is reset. Have drains cleaned if gurgling begins. Small habits keep gas where it belongs, in the pipe.
A plumber can also check vent terminations on the roof during another visit.
Common questions
Sewer smell questions
In small amounts it is mostly a nuisance, but strong or persistent odors need attention. Never ignore a gas smell.
Changes in pressure and a damp line can push odor toward weak spots such as a dry trap or a cracked pipe.
They hide the smell and leave the cause. Find the source.
Yes. It lets gas push past traps. Gurgling is a common companion sign.
Related services
Sewer Line Repair
Fix a cracked, root-choked or sagging sewer pipe while replacing only what has to go.
Drain Cleaning & Unclogging
Open clogged sinks, tubs, laundry lines and main drains, and find out why they keep stopping.
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A sewer odor you cannot trace?
Call and say where it is strongest. The dispatcher will find a nearby contractor.