The short answer
Residue Left Behind
Sewage leaves a film of bacteria and organic matter on surfaces, even after you wipe them down. Soap and water alone often do not remove that residue from porous materials like wood, grout, or unsealed concrete. The bacteria continue to produce gases that smell like rotten eggs or waste.
Disinfecting with a proper sanitizer is part of the cleanup, but it only works on surfaces it touches. Cracks, gaps, and rough textures can hide residue. If the smell persists, the affected material may need to be removed and replaced. Porous items like drywall or carpet often cannot be fully cleaned.
The Source May Still Be Active
Sometimes the lingering smell means sewage is still entering the home. A slow leak from a pipe, a cracked wax ring on a toilet, or a blocked drain can allow small amounts of waste to seep out. You might not see it, but the odor will be constant or worsen over time.
Check for signs like a damp spot on the ceiling, a musty smell near a toilet, or a slow drain. A plumber can inspect the pipes and fix any leaks. If the source is still active, cleaning the visible mess will not stop the smell. Fixing the leak is essential before any deep cleaning can work.
Ventilation and Airflow
Even after the source is gone, the odor can stay in the air and in soft furnishings like curtains, upholstery, or mattresses. These items absorb the smell and release it slowly. Good airflow helps push the stale air out and bring fresh air in. Open windows and use fans to speed up the process.
Air purifiers with activated carbon filters can help remove odor particles from the air. Baking soda placed in bowls around the room can absorb some smells, but it is a temporary fix. If the odor has soaked into fabrics, washing them or having them professionally cleaned may be necessary. The air will clear faster once the surfaces are truly clean.
When to Call the Pros
If the smell lasts more than a few days after you have cleaned and dried the area, it is time to bring in local water damage pros. They have equipment like industrial dehumidifiers, air movers, and moisture meters that can find hidden dampness. They also know which materials to remove and how to dispose of them safely.
Sewage cleanup involves biohazards, so safety matters. The pros wear protective gear and use proper disinfectants. They can also check for mold, which often grows after sewage exposure and causes its own musty smell. If you feel unwell during cleanup, see a doctor. Acting quickly reduces the chance of long-term damage.
- Call a plumber if you suspect a leak is ongoing
- Ask the pros to check wall cavities and subflooring
- Remove any porous items that show signs of water damage
- Keep children and pets away from affected areas
- Wash your hands thoroughly after any contact
Water damage does not wait
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (480) 898-4279Frequently asked questions
How long does sewage smell last after cleanup?
It depends on how much sewage was involved and how well the area was dried. With thorough cleaning and drying, the smell may fade in a few days. If it lingers longer, there is likely hidden moisture or residue that needs professional attention.
Can I remove the smell myself?
You can try cleaning with a disinfectant, drying the area, and ventilating the room. But if the smell persists, the cause is often in places you cannot reach. Local water damage pros have the tools to find and remove hidden sources of odor.
Is the smell a health risk?
Sewage contains bacteria and viruses that can make you sick, so the smell itself is a warning sign. Avoid direct contact and keep the area ventilated. If you feel unwell, see a doctor. The pros handle sewage cleanup with protective gear to reduce risks.