What Kind of Contractor Do I Need for a Sewage Backup?
A sewage backup — water backing up in drains, a gurgling toilet, or a sewage smell inside — is a plumbing problem, and often a main sewer line problem rather than a single clogged drain. It is also a health hazard, so containment and cleanup matter alongside the repair. The key clue is whether it is one fixture or all of them.
Safety first
Sewage carries bacteria and pathogens — keep people and pets away from the affected area, do not use the plumbing until it is cleared, and wear protection if you must go near it. Widespread or repeated backups warrant professional cleanup.
The 2 trades this job usually needs
A single problem often spans several trades. Here is who does what, and why.
Clear and diagnose the blockage — a clogged drain, a main sewer line blockage, tree roots in the line, or a failed sewer line — and repair or replace as needed.
Sewer and drain work is plumbing’s core scope; a whole-house backup usually means the main line, not one drain.
Safely clean, disinfect, and dry any area the sewage reached, and remove contaminated porous materials.
Sewage is a biohazard; contaminated materials and surfaces need proper cleanup, not a mop.
Not sure this matches your situation?
Describe what is happening in your own words and get a trade-by-trade breakdown for your exact problem — free, no account required. You can then reach out to any qualified pro.
Describe my problem →Common questions
Is a sewage backup an emergency?
Yes, treat it as one. It is a health hazard and can damage your home fast. Stop using water fixtures (which add to the backup) and get a plumber out; for anything beyond a small, contained amount, get professional cleanup too.
Why is sewage backing up in more than one drain?
When multiple fixtures back up — especially the lowest ones like a basement drain or first-floor toilet — it usually points at the main sewer line, not a single clog. That is a main-line diagnosis for a plumber.
What causes a main sewer line to back up?
Common causes are tree roots growing into the line, grease and debris buildup, a collapsed or bellied pipe, or a blockage between the house and the municipal main. A plumber can camera the line to find out.
Can I clean up sewage myself?
A very small, contained amount on a hard surface, with protection, sometimes. But sewage is a biohazard — larger backups, or any that soaked carpet, drywall, or flooring, call for professional cleanup to disinfect properly.