Is sewage backup covered by insurance?

Many homeowner's policies include sewer backup coverage, but it's often an add-on rider. Check your policy or call your agent. AST works directly with insurance companies to document and process sewage cleanup claims.

How long does sewage cleanup take?

Emergency extraction and decontamination typically takes 1-3 days. Structural drying takes an additional 3-5 days. Full restoration including reconstruction can take 2-4 weeks depending on the extent of damage.

Can I stay in my home during sewage cleanup?

No. The affected area must be evacuated during cleanup due to health risks from airborne pathogens. Once air quality testing confirms safe conditions, you can return to unaffected areas of the home.

Water Damage 6 min readFebruary 5, 2026

Sewage Backup Cleanup: Health Risks and What to Do

A sewage backup is one of the most dangerous and unpleasant water damage events a homeowner can face. Unlike clean water from a burst supply line, sewage contains bacteria, viruses, parasites, and other pathogens that pose serious health risks. Understanding the dangers and the proper cleanup process is essential.

Why Sewage Backup Is a Health Emergency

Sewage (Category 3 or 'black water') contains E. coli, Salmonella, Hepatitis A, Giardia, and other dangerous pathogens. Exposure through skin contact, ingestion, or inhalation of contaminated air can cause serious illness. Children, elderly individuals, and immunocompromised persons are at greatest risk.

Common Causes of Sewage Backup

Clogged sewer lines — grease, hair, and debris accumulate over time

Tree root intrusion — roots infiltrate and block sewer pipes

Municipal sewer overflow — heavy rain overwhelms city infrastructure

Broken or collapsed pipes — aging infrastructure fails

Septic system failure — overloaded or unmaintained systems back up

What to Do Immediately

Evacuate the affected area — do not walk through or touch sewage water

Turn off HVAC to prevent airborne contamination spread

Do NOT attempt DIY cleanup — sewage requires professional decontamination

Call AST at (210) 599-9726 for emergency sewage cleanup

Contact your insurance — most policies cover sudden sewage backup

Why DIY Sewage Cleanup Is Dangerous

Sewage cleanup requires full PPE (Tyvek suits, N95+ respirators, eye protection, rubber boots), professional-grade disinfection agents, HEPA air filtration, and proper disposal of contaminated materials. Without this equipment and training, you risk exposing your family to dangerous pathogens and creating long-term contamination.

AST's Category 3 Sewage Cleanup Process

Full containment and negative air pressure setup

Removal of all contaminated porous materials (carpet, padding, drywall below flood line)

Extraction of standing sewage water

Professional-grade antimicrobial treatment of all affected surfaces

Structural drying with commercial equipment

Air quality testing to verify safe conditions

Reconstruction of removed materials

Need Emergency Sewage Cleanup?

Frequently Asked Questions

Water Damage

Sewage Backup Cleanup: Health Risks and What to Do

Why Sewage Backup Is a Health Emergency

Common Causes of Sewage Backup

What to Do Immediately

Why DIY Sewage Cleanup Is Dangerous

AST's Category 3 Sewage Cleanup Process

Need Emergency Sewage Cleanup?

Frequently Asked Questions

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