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What Are the Health Risks of Sewage Exposure at Home?

Last updated October 31, 2026

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The short answer

Immediate Illnesses

Sewage contains pathogens like E. Coli, salmonella, and hepatitis A. Touching it or breathing its mist can lead to diarrhea, vomiting, fever, or cramps. These symptoms can appear within hours or days after exposure. You might also get skin rashes or eye infections if sewage splashes on you.

If you feel unwell after contact, see a doctor. Tell them about the sewage exposure so they can test for specific infections. Do not wait for symptoms to pass on their own. Some infections, like hepatitis A, can take weeks to show and may require treatment.

  • Wash hands with soap and clean water after any contact
  • Avoid touching your face, mouth, or eyes
  • Remove and wash contaminated clothing separately
  • Keep children and pets away from affected areas
  • Do not eat or drink near the sewage site
  • Seek medical care if you develop any symptoms

Long-Term Breathing Risks

Dried sewage can release dust and spores into the air. Breathing these particles may irritate your lungs and trigger asthma or allergies. Over time, exposure to mold that grows on sewage-soaked materials can cause chronic coughing, wheezing, or sinus problems. People with existing respiratory conditions are especially vulnerable.

The humid climate in your area, with warm summers, can speed up mold growth after sewage backups. Act quickly to dry out the affected area. Open windows for ventilation, but avoid spending time in the room until it is cleaned. Consider using a mask if you must enter.

  • Wear an N95 mask if you must enter the area
  • Use fans to push air outside, not into the rest of the home
  • Remove wet carpets and padding as soon as possible
  • Run a dehumidifier to lower moisture levels
  • Do not use a standard vacuum on dry sewage dust

Protect Your Family

Sewage exposure is especially dangerous for vulnerable groups. Pregnant women, infants, elderly people, and anyone with a weakened immune system should stay out of the affected area until cleanup is complete. Their bodies are less able to fight off the pathogens.

If someone in your home has a chronic illness like diabetes or lung disease, keep them in a separate part of the house. Do not let them help with cleanup. Even healthy adults should limit their time in the space and wash thoroughly afterward.

Why Professional Help Matters

Cleaning sewage is not like cleaning a regular spill. The pros use special equipment to remove contaminated water, sanitize surfaces, and dry materials fully. They know how to handle hazardous waste safely. Without proper training, you could spread germs or miss hidden pockets of moisture.

Local water damage pros can assess the extent of the backup and take steps to prevent future issues. They also have industrial-grade fans and dehumidifiers to dry out walls and floors. This reduces the chance of mold growing after the visible sewage is gone.

Steps After Cleanup

After the pros finish, check that all surfaces are dry and that any sewage smell is gone. If you still smell sewage, it may mean moisture is trapped behind walls or under flooring. You might need additional drying or inspection to ensure the area is safe.

Replace any porous items that cannot be cleaned, like mattresses, pillows, or stuffed toys. These items can harbor bacteria even after drying. Your insurance company may help with the cost, but policies vary, and your insurer decides what is covered. Keep records of all damage and cleanup for your claim.

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Frequently asked questions

Can I clean up sewage myself?

Small, contained spills on hard surfaces might be manageable with bleach and gloves. But sewage in carpets, drywall, or large areas is dangerous. The pros have the right gear and methods to remove all contamination. For your safety, call them for anything beyond a tiny spot.

How long does sewage odor last?

The smell can linger for days or weeks if the area is not dried and sanitized properly. Odor often means bacteria or mold are still active. After cleanup, use an air purifier or deodorizer. If the smell persists, you may need further drying or replacement of affected materials.

What should I throw away?

Throw away porous items that soaked up sewage, such as carpet, padding, drywall, insulation, mattresses, and upholstered furniture. Hard surfaces like tile and concrete can be cleaned. When in doubt, discard it. Keeping contaminated items can put your family at risk.

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