Sewer Backup in Mississippi

By Mississippi Plumbing 247 Editorial Team · Published November 6, 2026

Sewage backing up into your home is not a plumbing inconvenience. It is contaminated water in your living space, and it needs a professional now. This guide covers the signs, the health risks, what not to do, and the cleanup and insurance steps that follow.

Signs of a sewer backup

Several fixtures misbehaving at once is the tell: a toilet that bubbles when the washer runs, a shower that fills when a toilet flushes, sewage in a floor drain, gurgling drains, or a strong sewage smell from drains. One slow drain is usually a local clog. Several fixtures together means the problem is in the main sewer line.

The health risk

Sewage is contaminated water. It carries bacteria and other pathogens, and contact with it — or with surfaces it has touched — is a health risk, especially for children, older people, and anyone with a weakened immune system. Keep people and pets away from the water, do not let children play in it, and do not try to clean it up with a household mop and bucket. Cleanup should be done by a remediation professional with the right protective equipment and disinfectants.

What NOT to do

• Do not run water — no flushing, no dishwasher, no laundry. Every gallon you add pushes more sewage back into the house.
• Do not use chemical drain cleaners in a backed-up line.
• Do not plunge a toilet that is backing up with sewage.
• Do not walk through sewage in bare feet or open shoes.

City sewer vs septic

The cause depends on your system. On a city sewer, a backup often comes from a blockage in the lateral line to the street or in the shared main — tree roots, grease, or a collapsed pipe. On a septic system, it can mean a full tank, a failed drain field, or a blocked line between the house and the tank. Tell us which system you have when you call; it changes the diagnosis. A sewer camera inspection — typically $150–$400 — shows the cause either way.

Cleanup and repair costs

Sewer backup repair typically runs $500–$3,500. Clearing a main sewer clog typically runs $300–$500, and a trenchless sewer repair typically $3,500–$10,000. Cleanup and remediation are separate from the repair and can cost as much as the plumbing work — which is why documentation and insurance matter. These are typical ranges from a published Southaven pricing guide, not fixed quotes.

Insurance and documentation

Many standard homeowner policies exclude sewer backup unless a specific endorsement was added — check your policy before assuming you are covered. Whatever the coverage, document everything: photos and video of the backup, the affected rooms, and damaged belongings; receipts for cleanup and repairs; and our written description of the cause. Call your insurer promptly and ask what documentation they need.

If sewage is in your home now, call (662) 550-8213. We handle sewer backups — see our sewer backup repair page.

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Mississippi Plumbing 247 · 7305 Murry Hill Cir, Olive Branch, MS 38654, USA · (662) 550-8213 · [email protected]