A basement sewage issue is one of the most hazardous and unpleasant problems a homeowner can face. From foul smells to bacterial exposure, the damage goes far beyond inconvenience. Early recognition is key to limiting structural damage and protecting your health.
Here are the signs that your basement may be contaminated by sewage—and what steps to take next.
Strong, Persistent Odor
One of the first warning signs of a sewage backup is a foul, lingering smell that doesn’t go away with ventilation. The odor usually smells like rotten eggs or decaying organic matter. If your basement suddenly smells like a neglected drain, it’s time to investigate.
Unusual Water Pooling or Backflow
If you see water or sludge seeping up through floor drains, toilets, or sinks in the basement, this could indicate a blocked sewer line. This kind of backflow contains contaminated water and can spread quickly across flooring and drywall.
Even a small puddle in an unusual place deserves attention. It often signals a deeper problem below the surface.
Visible Debris in Standing Water
Unlike a clean water leak, sewage backups may contain toilet paper, waste particles, or dark sludge. This visible contamination is a strong indication that you’re dealing with Category 3 water—classified as highly unsanitary.
Avoid contact with the water and immediately block access to the affected area.
Slow Drainage or Gurgling Sounds
Gurgling noises coming from drains or toilets are often caused by trapped air in the pipes due to a blockage. If this sound occurs frequently, or drains in the basement are unusually slow, your system could be under stress from a clog deeper in the sewer line.
Mold or Mildew Along the Baseboards or Walls
When water stays trapped in the basement—even for a few hours—mold and mildew may begin forming on surfaces. While mold alone doesn’t confirm sewage, it can be a side effect of unresolved water damage caused by a backup. Mold should be treated seriously, especially in humid basement conditions.
Increased Pest Activity
Rodents, drain flies, and cockroaches are often drawn to environments impacted by sewage. If you suddenly notice more pests around drains or walls, this could signal contaminated moisture beneath the surface.
Act Fast with Professional Help
Sewage contamination spreads bacteria, viruses, and fungi that can cause serious illness. If you suspect sewage damage in your basement, avoid contact and don’t attempt to clean it with household tools.
For immediate, professional sewage cleanup in Glenview, IL, contact ServiceMaster Cleaning and Restoration Pro. Their certified team uses industry-grade extraction, sanitization, and drying methods to restore safety and comfort to your home—fast.
