Sewage Backup Emergency Checklist
Sewage backup is not the same as a clean-water leak. The IICRC classes it as Category 3 water — grossly contaminated — and the cleanup rules are different from a burst pipe or a washing-machine overflow.
Do this first
- 1Stop using water in the home — sinks, toilets, showers, washing machine — so you don't add more sewage to the backup.
- 2If you can safely reach it, shut off the main water supply to stop supply-side water pushing through the line.
- 3Keep people and pets out of the affected area. Sewage carries bacteria, viruses and parasites.
- 4Put on rubber boots and gloves, and wash hands thoroughly after any contact.
- 5If the area is near outlets or appliances, shut off power to that part of the home if it's safe to reach the panel.
- 6Open exterior windows and doors to let fumes out.
- 7Call a certified cleanup company and your insurer — most policies cover sewer backup only if you added the endorsement.
- 8Photograph the area for your claim before anything is removed.
Avoid
- ✕Don't use a normal vacuum or mop. Standard household equipment spreads contaminated water instead of removing it.
- ✕Don't try to save porous items — carpet, drywall, insulation, upholstered furniture and cardboard soak up contamination and usually cannot be safely cleaned.
- ✕Don't put sewage-soaked items in a regular household bin. They need to be bagged and removed properly.
- ✕Don't run your HVAC system if it or the ductwork may have been affected.
Proper Category 3 cleanup includes removing contaminated materials, HEPA air filtration, antimicrobial treatment, and drying — then confirming clearance. It is not a matter of wiping surfaces down.