How to Clean Up a Sewage Backup
(And When to Call the Pros)

Why Sewage Is Different From Regular Water Damage

Regular water damage - from a burst pipe or roof leak - is a structural problem. Dry it out, replace damaged materials, and you're back in shape.

Sewage backup is a biohazard. Raw sewage contains a dangerous mix of:

• Bacteria: E. coli, Salmonella, Shigella, Campylobacter
• Viruses: Hepatitis A, norovirus, rotavirus
• Parasites: Cryptosporidium, Giardia
• Fungi: Various molds that begin growing quickly in organic-rich sewage

These pathogens don't just stay in the puddle. They spread through contact, airborne particles, and absorbed materials. This is why sewage backup requires a fundamentally different approach than water damage - and why the IICRC classifies it as Category 3 "black water," the most hazardous contamination level.

Who Should NOT Be in the Affected Area

Be firm about this. Until the area is professionally cleaned and declared safe, keep the following people completely away from the affected space:

• Pregnant women
• Infants and children under 12
• Adults over 65
• Anyone with a compromised immune system (diabetes, HIV, chemotherapy, organ transplant, etc.)
• Anyone with open wounds or skin conditions
• Anyone without proper personal protective equipment (PPE)

If anyone in your household is in these categories, the best decision is to temporarily relocate everyone until cleanup is complete.

The 4-Step Sewage Cleanup Process

Whether you're a homeowner doing minor cleanup or a professional crew handling a major backup, the process follows the same four essential steps:

Step 1: Protect Yourself

Before touching anything, gear up. At a minimum: rubber gloves (not latex - they tear too easily), rubber boots, goggles or eye protection, and an N95 or better respirator. Ideally, add a disposable Tyvek suit.

Sewage aerosols are real. Pumping, mopping, or even walking through sewage can send contaminated particles into the air. Eye protection and respiratory protection aren't optional.

Step 2: Remove Standing Sewage

Use a wet-dry vacuum, submersible pump, or professional extraction equipment to remove standing liquid. Dispose of it according to local regulations - in most cases, sewage can be disposed of back into the sewer system via a cleanout, not poured outside or into stormwater drains.

Do not use a household vacuum cleaner. It will distribute contamination through the exhaust.

Step 3: Remove and Dispose of Contaminated Materials

This is where most DIY attempts fail. Any porous material that absorbed sewage must be removed. You cannot clean sewage contamination out of porous materials - the pathogens penetrate too deeply and can't be reached by surface disinfectants.

Materials that typically must be removed include:

• Drywall (up to the flood line, typically)
• Insulation
• Carpet and carpet padding (always remove - never save)
• Vinyl and laminate flooring if contamination is underneath
• Wood framing if saturated (case by case)
• Personal belongings and furniture that absorbed sewage

Bag all removed materials in heavy contractor bags. Check your local regulations for proper disposal - sewage-contaminated materials may need special handling at the landfill.

Step 4: Disinfect, Deodorize, and Dry

After all contaminated materials are out, clean all hard non-porous surfaces thoroughly with a detergent solution, then apply an EPA-registered disinfectant appropriate for sewage contamination. Bleach solutions (10% concentration) work for hard surfaces, but many pathogens require longer contact times than people expect - usually 10 minutes or more.

HEPA air scrubbers should run during and after cleanup to capture airborne particles. Industrial dehumidifiers and air movers then dry the structure - never let a sewage-affected area sit wet, as mold follows quickly.

Why DIY Sewage Cleanup Is Often More Dangerous Than It Looks

A few important realities:

• Sewage spreads. Walking through contaminated areas, using fans, and incomplete cleanup can spread pathogens to unaffected areas of your home.
• Improper disposal is a problem. Pouring sewage-contaminated water outside or into stormwater systems can violate local ordinances and contaminate soil and water.
• You can't smell what you miss. After a while, the brain habituates to odors. Areas that seem clean after DIY effort may still harbor contamination.
• Porous material removal is non-negotiable. If you dry the carpet and drywall instead of removing it, you have not cleaned up the sewage - you've just dried it in place. The pathogens are still there.

When to Call a Professional

Call a professional sewage cleanup company any time:

• The backup affected more than a small, non-porous area (like a tiled floor)
• Water entered walls, flooring, or any porous material
• Vulnerable individuals (pregnant, elderly, children, immunocompromised) live in the home
• You're filing an insurance claim - proper documentation matters
• You're not sure how far the contamination spread
• The odor persists after initial cleanup

Honestly? For most sewage backups, calling a professional is the right move. The health risks are real, the cleanup requirements are strict, and partial cleanup is worse than no cleanup - it gives a false sense of safety while contamination remains.

What About Insurance?

Most homeowner's insurance policies cover sewage backup events. Before you start any cleanup, call your insurance agent - and call Five Point Restoration. We document everything from day one, which protects your claim and ensures nothing gets missed.

Learn more in our post: Will My Insurance Cover Water Damage?