You flushed, and the shower drain in the basement started gurgling. Minutes later, raw sewage was coming up through the floor drain and both toilets. This is Category 3 blackwater, loaded with bacteria and viruses, and it is not something to mop up with household cleaners.
Free referral to independent, licensed and insured local pros. Zip codes served include 44681 44687 44654.

Sewage is a health hazard first and a water problem second. A Water Damage is a free referral service that connects you with independent, licensed and insured contractors near Walnut Creek who are equipped for Category 3 blackwater, including protective gear, containment, and hospital-grade disinfectants.
Expect Tyvek-style suits, respirators, and gloves. Contaminants stay in the work zone, not tracked through your home.
Plastic barriers seal off the affected area, and HEPA air scrubbers create negative pressure so contaminated air does not drift into clean rooms.
Confirm license and insurance on arrival. Biohazard jobs should only go to properly insured pros.
You get a written estimate that covers removal, disinfection, and drying before work starts.

Proper sewage remediation is methodical. Contamination is removed, every surface is disinfected, and only then does drying begin.

Liquid sewage and solids are extracted with dedicated equipment and disposed of according to local rules, not dumped down another drain.
Anything porous that absorbed sewage, like carpet, drywall, and insulation, is removed and bagged.
Concrete, framing, and tile are cleaned and disinfected with EPA-registered products at the correct dwell time.
After disinfection, HEPA air scrubbers and odor control treatments remove lingering sewage odor from the air and structure.
Some contractors use ATP surface testing to confirm cleaning worked. Then drying equipment runs until materials read dry.
Tell dispatch which drains are backing up and how far the sewage spread.
A local contractor calls back with an arrival window and reminds you to keep everyone away from the contaminated area.
The pro sets up containment, assesses how far contamination reached, and gives you a written estimate before removal begins.
Sewage and damaged materials come out, everything is sanitized and dried, and you will be pointed to a plumber if the line needs work.
Stop using water and keep everyone away. Help can be on the way now.
Main line backed up into the basement shower and floor drain. The crew showed up in full suits, sealed off the basement, and cleaned it like a hospital. No smell after they left.
Carmen E.Main line backup, basementThey explained why the carpet and bottom of the drywall had to go. Not what I wanted to hear, but it made sense once they mentioned what is in sewage.
Steve R.Toilet overflow into finished roomI have little kids, so I was worried. They set up an air scrubber and plastic walls so nothing spread upstairs.
Jenna P.Sewage backup, family homeThey recommended a plumber to camera the line afterward. Turned out to be tree roots. Glad we found it.
Omar H.Recurring sewer backup

It is Category 3, meaning grossly contaminated. That category triggers full biohazard protocols.
It depends on the size of the backup and where it is. Small contained areas may be fine with containment in place. Large backups, or households with infants, elderly, or immune-compromised people, often warrant staying elsewhere.
A very small hard-surface spill can be cleaned with gloves, boots, and a disinfectant. If sewage reached carpet, drywall, or a large area, professional cleanup is the safer choice.
Often only with a sewer backup add-on. Your agent can tell you what your policy includes.
Tree roots, grease clogs, damaged pipes, and city sewer overloads are the usual culprits.
No. A Water Damage is a free referral service connecting you with independent, licensed and insured local contractors who do the work and bill you directly.

Calls from Walnut Creek and zip codes such as 44681 44687 44654 are routed to local biohazard-equipped pros.
Nearby cities are listed below.
