Sewage and Backup Cleanup in St. Louis, MO
A sewer backup through the floor drain is Category 3 black water and a health hazard. Call and a South County crew handles it safely, on-site in about 45 minutes.
☎ (314) 501-7498Call now, a live St. Louis dispatcher picks up any hour
How we handle sewage in St. Louis
Call & dispatch
A real person answers 24/7 and the nearest South County crew rolls with truck-mounted pumps, air movers, and moisture meters.
On-site assessment
We find the source and the full reach of the water, including what soaked into the slab, wall cavities, and subfloor.
Extract & dry
We pull the standing water, then run air movers and dehumidifiers to a verified dry standard, not just the surface.
Verify & bill
We log moisture readings until the structure is dry, then document the loss and bill your carrier directly.
A sewer backup is the water loss you do not clean up yourself. When a lateral or combined line surcharges and pushes waste up through a basement floor drain, that is Category 3 black water: it carries bacteria and needs containment, protective gear, and full disinfection. St. Louis Water Damage Pros handles sewage backups safely, 24/7, and reaches most South County homes in about 45 minutes.
Why old St. Louis homes back up
South County and south city are full of pre-1980 brick homes on clay lateral lines and combined city sewers, and that plumbing is why backups repeat here:
- Combined sewers that carry both waste and storm water surcharge in a hard rain and reverse into the lowest drain
- Old clay lateral lines crack, sag, or fill with roots and lose capacity
- A missing backwater valve leaves nothing to stop the reversal
- A basement with no working pump makes it worse, which ties into sump pump failure and a flooded basement
The CDC floodwater safety explains why sewage-contaminated water is a health risk, and the EPA flood cleanup guidance covers safe cleanup and disinfection after a backup.
Sewage coming up through the basement drain? Do not touch it. Call now and a South County crew handles it safely, on-site in about 45 minutes.
☎ Call (314) 501-7498Stay away from black water
- Keep people and pets off the contaminated area and out of the basement
- Do not run the HVAC if it could pull contaminated air through the house
- Turn off water use upstairs so nothing adds to the backup
- Let our crew handle removal in protective gear, not you
Signs of a Category 3 sewer backup
Water rising from the floor drain or lowest toilet, a strong sewage odor, gurgling drains, or dark, cloudy water with debris. Any of these means contaminated water, so keep off it and call a crew equipped for black water.
How we clean up a sewage backup
We contain the area, extract the contaminated water, and remove porous materials the waste touched, such as carpet, pad, and lower drywall. Then St. Louis Water Damage Pros cleans and disinfects every affected surface, deodorizes, and dries the structure to a verified standard with air movers and dehumidifiers. We document the loss for your claim and, where a missing backwater valve or a failing lateral line caused it, we tell you what will stop the next one.
"A heavy rain sent sewage up through our basement floor drain. They showed up geared for it, removed the ruined carpet, disinfected everything, and dried it properly. The basement was safe and odor-free when they finished."
Marcus T. · Oakville
Why South County calls us first
On-site in about 45 minutes
A real person answers 24/7 and a local South County crew rolls the moment you call, any hour, any day.
IICRC certified crews
Trained technicians with truck-mounted pumps, air movers, and moisture meters, not a mop and a bucket.
We bill your insurer
We document the loss with photos and readings and work with your carrier directly, so the paperwork is not on you.
Deep St. Louis knowledge
Old brick basements, clay lateral lines, sump pits, and hard-freeze pipe splits. We know how water moves here.
Rooted in South County, out to the metro
Based on Gravois Road in Affton, we respond across South County and the greater St. Louis metro, day or night.
Based on Gravois Road in Affton at 9200 Gravois Rd, Saint Louis, MO 63123, our crews cover South County and the greater St. Louis metro, day or night, and reach most homes in about 45 minutes.
We serve Affton, Sunset Hills, Sappington, Oakville, Mehlville, Concord, Lemay, Crestwood, Kirkwood, Webster Groves, and the south St. Louis neighborhoods.
See every neighborhood and ZIP we serve ›Related water damage services
Common questions, answered
Is a sewage backup dangerous to clean myself?
Yes. Sewer water is Category 3 black water that carries bacteria and viruses, and it needs containment, protective equipment, and proper disinfection and disposal. Stay off it and call St. Louis Water Damage Pros, who are equipped and trained to remove and disinfect it safely.
Why does my St. Louis basement keep backing up?
Older South County and south city homes sit on clay lateral lines and combined city sewers that surcharge in heavy rain, and many have no backwater valve to stop the reversal. We clean and dry the backup, then explain whether a backwater valve, a lateral repair, or a sump backup would keep it from repeating.
Does insurance cover sewer backup in St. Louis?
Sewer and drain backup is usually covered only by a specific backup rider, not a base homeowner policy. We document the loss in full so you can confirm coverage with your carrier, and we bill the carrier directly where the rider applies.
South County's water damage crew is ready when you are
Water sitting means damage growing. Call St. Louis Water Damage Pros and a local crew is on the way, on-site in about 45 minutes.
(314) 501-7498Call now, a live St. Louis dispatcher picks up any hour