What Is Sewage Damage?

Sewage backups involve Category 3 water — also known as "black water" — which contains bacteria, viruses, parasites, and other dangerous pathogens. This is the most hazardous type of water damage and requires professional remediation. Never attempt to clean up a sewage backup yourself.

Sewage contamination poses immediate health risks including gastroenteritis, hepatitis, and other serious infections. Every surface that contacts sewage water must be professionally decontaminated or removed.

How Sewage Backups Happen

Municipal sewer system overload — during heavy rain events, combined sewer systems in older Western Washington neighborhoods can back up into homes through floor drains and toilets
Blocked sewer laterals — tree roots, debris, or collapsed pipe sections block the line connecting your home to the city sewer
Septic system failures — common in rural areas of Pierce, Thurston, and Lewis counties
Sump pump failures — when sump pumps fail during storms, contaminated ground water can enter basements
Toilet and drain backups — blockages causing sewage to overflow inside the home

Health Hazards

Sewage contains dangerous microorganisms including:

E. coli and Salmonella — bacterial infections causing severe gastrointestinal illness
Hepatitis A — viral liver infection transmissible through contaminated water
Giardia and Cryptosporidium — parasitic infections resistant to many disinfectants
Tetanus and Leptospirosis — bacterial infections from open wound exposure

Children, elderly individuals, and immunocompromised people are at highest risk. If anyone in your household has been exposed to sewage water, seek medical attention.

Our Sewage Cleanup Process

1. Safety Assessment

Our technicians arrive in full personal protective equipment (PPE) and immediately assess the contamination zone. We establish containment barriers to prevent cross-contamination to unaffected areas.

2. Sewage Extraction

Using specialized extraction equipment rated for Category 3 water, we remove all standing sewage water and contaminated debris. All extracted material is disposed of according to EPA and Washington State environmental regulations.

3. Contaminated Material Removal

Porous materials that have contacted sewage water cannot be salvaged and must be removed:

Carpet, carpet padding, and area rugs
Drywall (typically removed to 2 feet above the water line)
Baseboards and trim
Insulation
Upholstered furniture and mattresses
Paper products, books, and similar porous items

4. Professional Decontamination

All remaining surfaces — concrete, studs, subfloor, hard flooring — are treated with hospital-grade antimicrobial and antibacterial solutions. We use EPA-registered disinfectants proven effective against sewage-borne pathogens.

5. Structural Drying

After decontamination, industrial drying equipment removes all remaining moisture from the structure. This step is critical — any residual moisture can lead to mold growth, compounding the contamination problem.

6. Odor Elimination & Air Quality

Sewage odor is persistent and nauseating. We use a combination of HEPA air scrubbers, hydroxyl generators, and professional deodorizers to restore indoor air quality to safe, comfortable levels.

7. Restoration

Once the space is clean, dry, and verified safe, we replace all removed materials — drywall, insulation, flooring, baseboards — restoring your home to pre-loss condition.

Prevention Tips

Install a backwater valve — prevents municipal sewer backups from entering your home
Maintain your sewer lateral — have it inspected with a camera every 3-5 years
Keep a working sump pump with battery backup
Never pour grease down drains — grease solidifies in pipes and causes blockages
Know your cleanout location — the access point for clearing sewer line blockages

Insurance Coverage

Standard homeowner policies typically do notcover sewer backup damage. However, most insurers offer a sewer backup endorsement (rider) for $40-$100/year that provides $5,000-$25,000 in coverage. If you don't have this endorsement, call your agent today — it's one of the most valuable and affordable additions to any homeowner policy. Skoolie Restoration works with your insurance to document and maximize your claim.

Sewage Cleanup & Biohazard Removal