What should I do after a sewage backup?
Short answer: Stop using all water in the building so nothing more drains into the affected area, keep people and pets out, and do not attempt extraction yourself. Sewage is Category 3 contaminated water, which requires protective equipment, containment, removal of porous materials, and disinfection. Photograph the area from the doorway, ventilate if you safely can, and call for professional sewage cleanup.
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Call Now for Emergency Help(720) 319-807324/7 Emergency Call HandlingKey Takeaways
- Stop using water immediately: every flush and drain cycle adds to the backup.
- Sewage is Category 3 water and carries bacteria, viruses, and parasites.
- Porous materials that contacted sewage are removed, not cleaned.
- Do not run a shop vacuum or household equipment through sewage.
- Sewer backup coverage usually requires a specific policy endorsement.
Immediate Actions
- Stop all water use in the building, including toilets, sinks, laundry, and dishwasher.
- Keep people, pets, and especially children out of the affected area.
- Cut power to the area if water is near outlets or equipment, from outside the room.
- Photograph and video from the doorway without walking through the water.
- Open windows if outdoor conditions allow, to reduce odor and humidity.
- Call for professional sewage cleanup and report the claim to your insurer.
What Professional Cleanup Involves
- Containment of the work area with barriers and negative air pressure.
- Crew in protective equipment: suits, gloves, boots, and respiratory protection.
- Bulk removal of sewage and solids with appropriate extraction equipment.
- Removal and disposal of affected porous materials.
- Cleaning and disinfection of hard surfaces and structural components.
- Structural drying, then verification and often clearance documentation.
Do Not Delay for the Insurer
Contaminated water gets worse fast: bacterial load increases, odor permeates materials, and the affected area expands. Report the claim, but begin mitigation. Most policies expect you to prevent further damage rather than wait.
Colorado and Denver Considerations
Denver neighborhoods with original clay sewer laterals and mature street trees see recurring root-intrusion backups. If your home has a clay lateral, a camera inspection after cleanup identifies whether a repair or liner prevents the next event. Report suspected main line problems to the city wastewater division as well.
Exceptions and Important Considerations
- If the backup is from the municipal main, notify the city; responsibility for the lateral versus the main differs.
- If occupants are immunocompromised, elderly, pregnant, or very young, relocate them during cleanup.
- If sewage entered HVAC ductwork, duct cleaning or component replacement is part of the scope.
Related Questions
A very small spill on a hard, non-porous surface can be cleaned with proper protection and disinfection per CDC guidance. Anything reaching carpet, drywall, or a large area should be professional.
Typically two to five days for removal, cleaning, and drying on a residential backup, plus reconstruction.
Sewer gas is unpleasant and can contain hydrogen sulfide and methane. Ventilate, stay out, and let professionals with monitoring handle enclosed spaces.
Only if you carry a sewer or water backup endorsement on most policies. Coverage depends on your policy and insurer determination.
Sewage Backup Cleanup in Denver
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