The short answer
Health Risks from Sewage
Sewage is not just dirty water. It carries harmful microorganisms like E. Coli, salmonella, hepatitis A, and norovirus. These pathogens can survive on surfaces for days, so even a small leak poses a real threat to your health.
You can get sick by touching contaminated surfaces and then touching your face, or by inhaling tiny droplets when water splashes. Symptoms often include nausea, vomiting, diarrhea, fever, or skin rashes. Children, older adults, and people with weakened immune systems face higher risks.
- Wash hands with soap and water after any contact
- Keep children and pets away from the affected area
- Avoid touching your face until hands are clean
- Wear gloves, boots, and a mask if you must go near the leak
- Open windows for ventilation if possible
- Do not eat or drink near the spill site
Cleanup Steps You Can Take
If the leak is small and you feel comfortable handling it, start by turning off the water source if you can locate it. Keep your shutoff valve location written down so you can act fast. Then, remove any standing water with a mop or towels and discard anything porous that soaked up sewage, like carpets or cardboard.
Disinfect the area with a bleach solution (one part bleach to ten parts water) or a commercial disinfectant. Let it sit for at least ten minutes before rinsing. Dry the area thoroughly with fans or a dehumidifier. If sewage has seeped into drywall, flooring, or insulation, you may need to remove those materials.
- Turn off water supply to the affected fixture
- Wear rubber gloves, boots, and eye protection
- Remove and bag any sewage-soaked items immediately
- Use a disinfectant labeled for sewage or a bleach mix
- Dry the area completely to prevent mold growth
- Wash all clothes and towels separately in hot water
When to Call the Pros
A small leak can quickly become a big problem if sewage spreads behind walls, under flooring, or into porous materials. If you cannot find the source, if the leak has been present for more than a few hours, or if the area is hard to clean yourself, it's time to call local water damage pros.
The pros have specialized equipment like moisture meters and industrial fans to find hidden water and dry the area properly. They also know how to handle contaminated materials safely. Trying to clean a sewage leak without the right tools can leave pathogens behind and cause health issues later.
- The leak is larger than a small puddle
- You notice a strong sewage odor that persists
- Water has soaked into drywall or wood
- You or anyone in the home has health symptoms
- The source of the leak is unclear
- You have limited time or physical ability to clean
Preventing Future Leaks
Most sewage leaks start with a clogged or damaged pipe. Avoid flushing anything other than toilet paper, and do not pour grease or oil down drains. Regularly check under sinks and around toilets for signs of moisture or discoloration, which can indicate a slow leak.
If you have an older home, consider having a plumber inspect your pipes for corrosion or root intrusion. Catching small issues early can prevent a larger sewage backup. Also, know where your main shutoff valve is located so you can stop a leak quickly if one occurs.
- Only flush human waste and toilet paper
- Do not pour grease, oil, or coffee grounds down drains
- Inspect under sinks and around toilets monthly
- Watch for musty smells or water stains
- Schedule a plumbing inspection every few years
- Keep the shutoff valve accessible and labeled
Insurance and Costs
Sewage cleanup costs vary widely. You might spend a few hundred dollars on a simple disinfect and dry job, but a larger cleanup that involves removing drywall or flooring can cost several thousand. The final price depends on the size of the leak, how long it sat, and what materials are affected.
Homeowner's insurance sometimes covers sewage backup damage, but not always. Policies vary, and your insurer decides what is covered. Check your policy to see if sewage backup is included, and ask your agent about adding it if it is not. Keep records of any cleanup expenses for your claim.
Need help right now?
Phones are answered 24/7 for Oakland and nearby communities.
Call Now (510) 318-3798Frequently asked questions
How long does it take to get sick from sewage exposure?
Symptoms can appear within a few hours to a few days after exposure. It depends on the type of pathogen and your immune system. If you develop nausea, diarrhea, or a fever after cleaning up a sewage leak, see a doctor promptly.
Can I clean up a small sewage leak myself?
You can handle very small, contained spills if you wear protective gear and disinfect thoroughly. But if the leak has soaked into porous materials, if you cannot find the source, or if you feel unwell, call the pros. Safety matters more than saving money.
What should I do with items that got sewage on them?
Throw away anything porous like carpets, upholstered furniture, mattresses, or cardboard boxes. Non-porous items like plastic or metal can be cleaned and disinfected. When in doubt, discard it, because sewage contamination is hard to fully remove from porous materials.