What To Do If Sewage Backs Up Into Your House
Stop using water everywhere, keep people and pets out of the affected area, and do not run fans across it. Sewage in a house is a contamination problem first and a plumbing problem second.
What to do right now
Do these first. None of them need tools or plumbing knowledge, and they limit what this ends up costing you.
Stop and get out if any of these are true
Sewage in living space is a biohazard, not just a mess. Keep children and pets out, do not run fans that blow across it, and do not attempt to clean it yourself without gloves, eye protection and a mask.
- Stop using water everywhere in the houseEvery flush, shower and washing machine cycle adds to a blockage that already has nowhere to go. It comes back up at the lowest fixture. Stop using water entirely until the line is clear.
- Clear the area of people and petsClose the door. Children and animals should not be in the room, and anyone who has walked through it should not then walk through the rest of the house.
- Do not run fans across itBlowing air over standing sewage aerosolises it and spreads contamination. Ventilate to the outside if you can, but do not point a fan at the water.
- Cut power to the area if water is near anything electricalOnly from a dry position. If you cannot reach the panel safely, leave and call from outside.
- Photograph everything before you clean upPhotos and a short video of the water, the source and every damaged item. If you claim on insurance this is the evidence, and it cannot be recreated once the area is dry.
Does this need a plumber tonight?
- Sewage anywhere in living space
- Sewage reaching a heating vent or duct
- Anyone with a compromised immune system in the property
- Water and sewage near electrical equipment
- A smell with no backup, which is often a dry trap
- A slow drain with nothing coming back up
Why this one is different
Because the risk is biological rather than structural. Sewage carries bacteria and viruses, and the exposure routes are contact, contaminated surfaces and aerosols.
That changes the priorities. With a burst pipe the first job is stopping the water. With a sewage backup the first job is keeping people away from it, because the water is already where it should not be and the harm is to people rather than to plaster.
It matters most in households with young children, elderly residents or anyone immunocompromised. In those cases, staying elsewhere until it is cleaned properly is a reasonable decision rather than an overreaction.
Cleaning up, and what cannot be saved
Gloves, eye protection and a mask at minimum. Hard surfaces can be cleaned and disinfected. Porous materials that absorbed sewage generally cannot.
Carpet, underlay, and drywall that has wicked contaminated water are usually not salvageable, and drying them in place leaves contamination behind. That is unwelcome advice and it is still the right advice.
This is remediation work rather than plumbing. We clear the line and establish why it happened. We do not do the restoration and we will tell you that rather than take the whole job.
- Wear gloves, eye protection and a mask
- Disinfect hard surfaces, do not just dry them
- Remove porous materials that absorbed sewage
- Do not run fans across standing sewage
- Wash clothing separately and hot
- Photograph everything before removing anything
Questions people ask about this
Can I clean it up myself?
A small amount on a hard floor, with proper protection, yes. Anything that has reached carpet, drywall or a large area is remediation work, and doing it badly leaves contamination in the building.
Do I need to leave the house?
Not usually for a small contained backup. If it is extensive, or if anyone in the household is vulnerable, staying elsewhere until it is properly cleaned is sensible.
Is this covered by insurance?
Sewer backup is commonly excluded from standard policies and sold as a separate endorsement. Photograph everything before any cleanup regardless, because the evidence cannot be recreated.
If that is not quite what you have
Not sure how urgent this is?
Describe what you can see and hear. We will tell you whether it needs someone tonight, and what to do in the meantime either way.
Or send it over
Four things and a photo.