Why is sewage cleanup different from a regular water leak?
Water damage is sorted into three categories. A burst supply line is Category 1, clean water. A washing machine or dishwasher overflow is Category 2, gray water. Sewage is Category 3, black water, and it carries bacteria, viruses and other contaminants.
That changes the whole job. With clean water, the goal is to dry things and keep as much as possible. With sewage, the goal is to get contaminated porous materials out of the house, then clean, disinfect and dry what stays. Our crew wears protective suits, gloves and respirators for this work, and you should keep your distance too.
For a leak that isn’t sewage, see our water damage restoration page.
Does floodwater from outside count as sewage?
It’s treated the same way. Water that comes in from outside, from a creek rising, a yard draining toward the house or storm water through a basement wall, is Category 3 even if it looks clear. It picks up soil, animal waste, fertilizer and sometimes overflow from sewer and septic systems on its way in.
So a flooded basement after a heavy East Tennessee storm gets the same care as a sewage backup: protective gear, removal of soaked porous materials, and disinfection.
Is sewage in the house a health risk?
Yes, it can be. Sewage can carry germs that make people sick through contact, splashes or tracking it through the house. Plain safety steps:
- Keep kids and pets out of the affected area completely. Close doors or block off the space.
- Don’t walk through it, and never barefoot.
- Don’t try to vacuum it with a household vacuum or shop vac you plan to use again.
- Wash your hands well if you touched anything in the area.
- Turn off HVAC in that part of the house if it pulls air from the affected area.
- Stop using water: no flushing, showers, laundry or dishwasher until the cause is known. Every gallon down the drain can come back up.
If anyone feels sick, talk to a doctor. If there’s an electrical hazard or you smell gas, leave and call 911.
What gets thrown out after a sewage backup, and what can be cleaned?
The rule of thumb is porous versus non-porous.
Usually removed:
- Carpet and carpet pad soaked with sewage
- Drywall and insulation below the waterline
- Particleboard, pressed-wood cabinets and furniture bases that wicked it up
- Upholstered furniture, cardboard boxes, papers and soft goods that were in it
Usually cleaned and kept:
- Concrete floors and block walls
- Tile, glass, metal and most hard plastics
- Solid wood framing, once it’s cleaned, disinfected and dried
We photograph and list everything we remove and note why, so you have a record. Some items are a judgment call, and we’ll talk them through with you before they go.
Toilet overflow vs main sewer line backup
A toilet overflow from one clog is usually contained to one bathroom and maybe the hallway. If it’s caught fast and stays on tile or vinyl, the cleanup can be small. If it ran into carpet, under a vanity or down through the floor to the room below, it’s a bigger job.
A main line backup shows up at the lowest drains in the house first: a basement floor drain, a lower-level shower or a toilet. You may see it come up in several places at once, or hear gurgling when another fixture drains. That means the blockage is past the house’s individual drains, and you’ll need a plumber to clear the line before cleanup can finish. Stop using water until it’s cleared.
How is a home disinfected after sewage?
Disinfecting only works on surfaces that are already clean, so the order matters:
- Remove the sewage and the contaminated porous materials.
- Clean the remaining surfaces to get off the residue.
- Apply disinfectant to everything the water touched and let it work.
- Dry the structure with air movers and dehumidifiers, taking moisture readings until it’s dry.
Skipping the drying step is a common mistake. Mold can start growing on wet materials within 24–48 hours, so a cleaned but still damp wall cavity is a problem waiting to happen. If mold is already showing, our mold remediation page explains the next step.
Will insurance pay for sewage backup cleanup?
That depends entirely on your policy. Some policies treat sewer and drain backups differently from other water damage, so read your policy or call your agent to find out what yours says.
What we do: we work with your adjuster and document everything, with photos, moisture readings, notes and a list of what was removed and why. We don’t decide or promise coverage. More on our insurance claim help page.