What Diseases Can You Get From Sewage Backup Exposure?
Last updated October 25, 2026
The short answer
Common Gastrointestinal Illnesses
Sewage contains numerous pathogens that can cause severe stomach and intestinal problems. If you accidentally ingest contaminated water or food, you risk developing gastroenteritis, which brings vomiting and diarrhea. Salmonella and E. Coli infections are also common, leading to cramping and fever. These bacteria thrive in the nutrient-rich environment of raw sewage, making any contact a significant health hazard.
Giardiasis and cryptosporidiosis are parasitic infections spread through sewage exposure. They cause prolonged digestive distress, including watery diarrhea and abdominal pain. These parasites have protective shells, allowing them to survive in the environment for weeks. Proper hygiene and avoiding contaminated areas are your first defenses, but professional cleanup is the only way to eliminate the source of these pathogens.
Viral and Respiratory Risks
Viruses present in sewage, such as hepatitis A and norovirus, pose serious risks. Hepatitis A affects the liver and can cause jaundice and fatigue, while norovirus leads to intense, sudden-onset gastroenteritis. These viruses are highly contagious and can spread through microscopic droplets or contaminated surfaces, making thorough disinfection critical after a backup occurs.
Inhaling aerosols from disturbed sewage can lead to respiratory issues. Airborne bacteria and mold spores may trigger asthma attacks, allergic reactions, or infections like bronchitis. The damp environment left behind promotes mold growth, which introduces additional allergens. If you develop a cough or difficulty breathing after a sewage incident, consult a doctor and ensure the area is properly dried and cleaned.
Skin and Wound Infections
Direct skin contact with sewage water can cause infections, especially through cuts or scrapes. Bacteria like Staphylococcus and Streptococcus, common in waste, can lead to cellulitis, a painful skin infection. Symptoms include redness, swelling, and warmth around the affected area. Always wear protective gloves and clothing if you must be near the contamination, and wash any exposed skin immediately with soap and water.
More serious wound infections can develop if sewage enters a deeper cut. Tetanus is a risk if you are not up to date on vaccinations, as the bacteria Clostridium tetani lives in soil and feces. Any puncture wound exposed to sewage should be medically evaluated. Keep a first aid kit handy and understand that avoiding the contaminated area entirely is the safest course of action.
Key Protective Actions to Take
A prompt response reduces health risks. Treat all sewage as hazardous and keep children and pets away from the affected area. Do not attempt to clean it yourself with household products, as they cannot properly sanitize porous materials or kill all pathogens. Ventilate the space by opening windows if it is safe to do so, and arrange for professional sewage cleanup.
Document the damage for your insurance company by taking photos before any cleanup begins. Move undamaged belongings to a dry area to prevent cross-contamination. Policies vary, and your insurer decides what is covered. While waiting for the pros, turn off electricity to the affected area if you can safely reach the breaker box to prevent shock hazards from standing water.
- Avoid all contact with sewage water and contaminated items.
- Never use household fans, as they can aerosolize harmful pathogens.
- Wear waterproof gloves, boots, and an N95 mask if you must enter the area.
- Discard any porous materials like carpet, drywall, or insulation that sewage touched.
- Disinfect hard surfaces with an EPA-registered antimicrobial product after removal.
- Seek medical attention if you experience fever, vomiting, or skin rash after exposure.
Why Professional Cleanup Is Essential
Only specialized cleaning addresses the full scope of sewage contamination. The pros have industrial-grade equipment to extract water, remove unsalvageable materials, and thoroughly disinfect surfaces. They follow strict protocols for handling Category 3 water, which is grossly contaminated. This process is not a typical mopping job; it requires technical knowledge to ensure the home is truly safe for habitation again.
The cleanup process involves multiple steps: containment, removal, drying, and verification. Professionals use moisture meters and thermal imaging to find hidden dampness in walls and subfloors. They then apply antimicrobial agents to inhibit future mold and bacterial growth. This systematic approach is the only reliable way to prevent lingering odors and the long-term health risks associated with improper sewage cleanup.
Water damage does not wait
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (562) 512-6288Frequently asked questions
How soon after exposure do symptoms appear?
Symptoms can appear within hours or take several days. Gastrointestinal issues from bacteria often start within 6 to 72 hours. Viral infections like hepatitis A may not show symptoms for weeks. If you feel unwell after exposure, see a doctor and inform them about the sewage incident.
Can I clean a small sewage spill myself?
It is not recommended. Even small spills contain concentrated pathogens that can seep into flooring or drywall. Household cleaners cannot properly sanitize porous materials. For your safety, contact local water damage pros who are equipped to handle biohazardous waste and prevent cross-contamination.
Does insurance cover disease treatment from exposure?
Health insurance may cover medical treatment, but property insurance only covers damage to your home. Filing a claim for cleanup costs depends on your policy's cause of loss. Policies vary, and your insurer decides what is covered. Always check your specific policy details and consult your provider.
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