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24/7 Biohazard Response

Sewage Cleanup & Backup Removal, done safely

A sewage backup isn't just dirty water — it's a Category 3 biohazard. We connect you with crews who extract it, remove the contaminated materials, and fully disinfect the space with the right protective equipment, so your home is genuinely safe again.

Same-day biohazard response Full disinfection & drying IICRC-certified

No obligation · Insurance-friendly · Independent licensed & insured local companies

Technician in a full hazmat suit and respirator cleaning up a sewage backup on a basement floor Biohazard extraction & disinfection
24/7Live dispatch
every day of the year
Cat 3Sewage is "black water" — a biohazard, not dirty water
Days+Sewage bacteria survive on damp surfaces
PPEProtective equipment & disinfection are essential
$0Cost for your sewage cleanup inspection

Before You Touch It

What to do after a sewage backup

The instinct is to grab a mop — but raw sewage carries pathogens that make contact genuinely risky. Here's what to do, and what not to do, until a crew arrives.

1

Keep everyone away

Move people and pets out of the affected area. Treat it as a biohazard, not just a mess.

2

Stop using water

Don't flush toilets or run any water draining to that line until the backup is cleared.

3

Cut power if needed

If sewage reached outlets or appliances, shut off electricity to the area at the breaker.

4

Don't DIY — call

Avoid contact, photograph the damage for insurance, and call a biohazard crew to extract and disinfect.

Why It Happens

The common causes of a sewage backup

Sewage backs up when the path out of your home is blocked or overwhelmed. Knowing the source guides both the cleanup and preventing a repeat.

Main sewer line blockage

Grease, debris or tree roots invade and clog the main line, sending everything back up through the lowest drains — usually the basement.

Municipal backups

During heavy rain the city sewer can surcharge and push water and sewage back into homes through floor drains and toilets.

Septic system failure

An overfull, failing or flooded septic tank has nowhere to send waste, forcing it back into the house.

Clogged drains & toilets

A badly blocked toilet or drain line overflows contaminated water onto floors and into adjacent rooms.

Tree root intrusion

Roots seeking moisture crack and fill older sewer pipes, a slow-building blockage that ends in a sudden backup.

Flooding

Storm and flood water often carries sewage with it, turning a wet basement into a Category 3 contamination job.

How It Works

The sewage cleanup process

1

Assess & contain

Identify the contamination zone and seal it off so pathogens don't spread through the home.

2

Extract

Pumps and extractors remove the sewage and standing water safely, in full protective equipment.

3

Remove & dispose

Contaminated porous materials — drywall, carpet, insulation — are removed and disposed of properly.

4

Disinfect & deodorize

Antimicrobial treatment, HEPA air scrubbing and odor control on every surface that stays.

5

Dry & restore

Structural drying, then rebuild of what was removed — back to a safe, pre-loss condition.

Free Instant Tool

Sewage backup: what to do right now

Tell us where the sewage is and whether anyone has come into contact with it, and get an instant read on the hazard level, whether it's ever safe to handle yourself, and your best first step. This is a fast orientation while you call for sewage cleanup — not a quote or a coverage promise, and your policy and situation decide.

Raw sewage is Category 3 "black water" under the IICRC water categories — a biohazard, whatever the volume. This is general guidance only; a crew's on-site assessment has the final word.

Your situation at a glance

Hazard level
Safe to DIY?
First step

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Why It's Dangerous

The health risks of raw sewage

Sewage is classified as Category 3 "black water" because of what it carries. Exposure through contact, ingestion or breathing contaminated air can cause real illness — which is why it's treated as a biohazard rather than a cleaning job.

  • Pathogens. Bacteria, viruses and parasites in sewage can cause gastrointestinal illness, infections and other serious conditions.
  • Higher-risk people. Children, the elderly, pregnant women and anyone immune-compromised are especially vulnerable.
  • Lingering hazard. Contaminants survive on damp surfaces for days, so drying alone doesn't make an area safe — it must be disinfected.

Why not clean it yourself

Household cleaners and a mop spread contamination and expose you to pathogens without removing them from porous materials. Safe remediation means protective equipment, removal and disposal of what's contaminated, and hospital-grade disinfection of what remains.

Get it handled safely

Insurance

Does insurance cover sewage cleanup?

Here's the catch most homeowners don't know until it happens: standard homeowners policies usually exclude sewer and drain backups unless you added a specific endorsement.

  • Sewer backup endorsement. This optional rider is what actually covers a backup — it's inexpensive and worth having if you have a basement.
  • Sudden covered events. If the sewage results from another covered peril, cleanup may fall under that claim.
  • Crews document for the claim. Photos, contamination category and an itemized scope in the format adjusters expect.

Is it covered?

Sewer / drain backupNeeds endorsement
With backup endorsementUsually yes
Backup from covered perilOften yes
Flood-borne sewageFlood policy
Neglected maintenanceOften no

Coverage depends on your specific policy — check your declarations page.

Sewage Cleanup Cost

What affects your sewage cleanup cost

A contained toilet overflow and a basement of raw sewage are very different jobs, so the inspection that prices yours is free and carries no obligation. These are the factors that move the number:

  • How far it spread. A small contained overflow costs far less than sewage that soaked a whole basement and adjacent rooms.
  • Depth & volume. More standing sewage means more extraction, more contaminated material and more disposal.
  • Materials removed. Contaminated carpet, drywall, insulation and cabinetry usually can't be saved and must be removed and rebuilt.
  • Disinfection & disposal. Category 3 work requires hospital-grade disinfectants, HEPA scrubbing and proper biohazard disposal.
  • The source & rebuild. Clearing the blockage or fixing the septic issue, and the rebuild phase, are separate from the emergency cleanup.

Pro-Grade Equipment

A sewage backup, handled safely

Category 3 cleanup is about removing contamination and killing what's left — with extraction, disinfection and air-quality equipment, not a mop and bucket.

FAQ

Sewage cleanup questions, answered

How much does sewage cleanup cost?

It depends on how far the sewage spread, how deep it is, how much contaminated porous material must be removed, and the level of disinfection needed. A contained toilet overflow is a small job; a flooded basement of raw sewage is far larger. An on-site inspection gives an exact figure.

What is the best thing to clean up sewage with?

Raw sewage should not be handled with household cleaners. Professionals extract it with pumps, remove and dispose of contaminated porous materials, then use hospital-grade antimicrobial disinfectants and HEPA air scrubbing. Protective equipment is essential because of the pathogens involved.

Does homeowners insurance cover sewage cleanup?

Standard homeowners policies usually exclude sewer and drain backups unless you added a sewer backup endorsement (rider). If a covered sudden event caused it, or you carry the endorsement, cleanup is often covered — check your policy. Crews document everything for the claim.

How long do sewer bacteria live on surfaces?

Many sewage-borne bacteria and viruses can survive on surfaces for days to weeks in damp conditions, which is why simply drying an area is not enough. Contaminated porous materials are removed and hard surfaces are disinfected to make the space safe again.

Is sewage water dangerous?

Yes. Sewage is Category 3 "black water" carrying bacteria, viruses and parasites that can cause serious illness through contact, ingestion or inhalation. It is treated as a biohazard, with protective equipment, safe removal and full disinfection.

Can I stay in my house during sewage cleanup?

Keep out of the affected area entirely. Depending on how far the contamination spread and the ventilation, crews may set up containment so the rest of the home stays usable while the affected zone is cleaned.

Sources & Standards

Health and safety guidance follows the CDC — Flood & Sewage Water, CDC — Floods and US EPA — Flood & Sewage Cleanup. Water categories and Category 3 remediation follow the IICRC S500 standard. Insurance terms reflect Ready.gov — Floods and the FEMA National Flood Insurance Program.

Sewage is a biohazard — don't wait, and don't touch it

Get sewage cleaned up safely

Certified biohazard crews, full disinfection, insurance-friendly documentation — on call 24/7 across the US.

Call (888) 217-7423
Serving major metros nationwide: HoustonDallasChicagoPhoenixAtlantaMiamiDenverTampa

Why the first call matters

The first-hour match — water damage is priced by the hour it sat, not by the hour you called

Standing water stops being the problem within a day. What it leaves behind — saturated drywall, wet insulation, a subfloor that keeps giving moisture back into the room — is what the invoice is actually made of, and it grows while the house looks calm.

That is not a failure of homeowners who waited. It is how the trade is arranged: you call a company, it comes when its schedule allows, and the clock keeps running in between. Our line is open every day of the year, and the call reaches an independent licensed and insured restoration company that covers your area now rather than tomorrow. We do not do the work ourselves — we are paid for the introduction, which is set out in how we make money.

Call 24/7 — (888) 217-7423

Two things decide what this costs, and both are settled in the first hours. Moisture readings and photographs taken before anything is torn out are what an adjuster later accepts or disputes, and mold needs only a day or two of damp material to start. Neither waits for an appointment. And if the water came from outside — a river, a storm surge, groundwater — say so on the call. That is flood, a separate policy that a homeowners policy does not cover, and you should hear it from us before anyone arrives rather than after.

Guided by the standards we follow & cite

US EPACDCFEMA · NFIPIICRC S500 / S520

Written and reviewed by the FloodGuard Pros restoration editorial team — editors experienced in water damage restoration, working from the IICRC S500 (water) and S520 (mold) standards and citing primary sourceshow we research and review and who we are.

Advertising disclosure: FloodGuard Pros is a free referral and connection service for U.S. homeowners, not a restoration contractor. When you call, we connect you with independent, licensed and insured restoration companies, and we may earn a referral or advertising fee — at no cost to you. For life-threatening emergencies, gas leaks or electrical hazards, call 911 or your utility first. Coverage details depend on your individual insurance policy.

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