A sewage backup is one of the most serious water damage emergencies a homeowner can face. Raw sewage contains bacteria, viruses, and parasites that can cause serious illness. Here's exactly what to do — and what not to do — in the first hour.

DO: Leave the Affected Area Immediately

Do not walk through sewage water. Do not touch contaminated surfaces without proper PPE. Sewage contains E. coli, Salmonella, Hepatitis A, and other pathogens. Keep children and pets out of the affected area.

DO: Call a Professional Restoration Company

Sewage backup cleanup is Category 3 (black water) — the most severe contamination category. It requires specialized equipment, EPA-registered antimicrobials, and proper disposal of contaminated materials. This is not a DIY job.

DO: Call Your Insurance Company

Sewage backup coverage varies by policy. Many standard homeowners policies exclude sewage backup unless you have a specific endorsement. Call your insurance company immediately to understand your coverage.

DO NOT: Use Fans or HVAC

Running fans or your HVAC system will spread contaminated air throughout your home. Turn off your HVAC and do not use portable fans until the area has been professionally cleaned and disinfected.

DO NOT: Try to Clean It Yourself

Household cleaners are not sufficient to disinfect sewage contamination. Improper cleanup can spread contamination and leave pathogens behind. Professional restoration companies use EPA-registered antimicrobials and follow IICRC S500 protocols for Category 3 water.