Sewage backing up into a home is a health hazard, not just a mess, and San Mateo's older clay and cast-iron sewer laterals are prone to it during heavy winter storms. A crew responds with the extraction and sanitizing equipment category 3 water requires.
A crew arrives in about an hour with protective equipment and contains the affected area first, since category 3 water is treated as a contamination hazard from the start.
Submersible pumps and extraction equipment remove standing sewage from floors, and any water that reached crawlspaces or low rooms is pumped out separately.
Carpet, pad, and any porous material the sewage touched are removed and bagged for disposal, since they cannot be sanitized enough to keep.
Affected surfaces are cleaned with antimicrobial treatment, and dehumidifiers run until moisture readings confirm the space is dry and safe to occupy.
While help is on the way, these first steps, done only where it is safe, limit the damage and protect the insurance claim.
Shut the supply off at the source, or close the home's main valve if the source is not obvious. Stopping the flow limits the damage more than anything else.
Switch off electricity to the affected area, but only if the breaker can be reached without standing in or touching the water.
Get a crew dispatched right away. The sooner extraction and drying begin, the more flooring, drywall, and belongings can be saved.
Take photos and a short video of the water and the affected rooms before anything is moved, so the insurance claim starts strong.
Sewage backup cleanup in San Mateo typically runs from about $1,500 to $6,000, depending on how much of the home was affected, how much material has to be removed and disposed of, and whether the backup reached a crawlspace or multiple rooms. A single bathroom backup with quick response sits on the low end. A backup that spreads across a hallway and adjoining rooms sits on the high end. Because category 3 water is a contamination hazard, disposal and sanitizing are billed alongside extraction, and the work is documented for direct insurance-claim submission.
Crews reach San Mateo and San Mateo County fast, from North Central, Hayward Park, and Aragon to Shoreview, Sunnybrae, and Hillsdale, plus nearby Foster City, Burlingame, and Belmont. See the full list on the areas served across San Mateo page.
See all areas servedEvery loss is photographed, measured, and logged from the first visit, so the paperwork holds up with the insurance carrier.
Technicians follow recognized IICRC drying standards and prove it with daily moisture readings on San Mateo homes, not guesswork.
Emergency dispatch any hour of the day or night, with a real crew on the way across the mid-Peninsula, not a callback in the morning.
A real crew dispatched any hour, not a callback in the morning.
Trained technicians following recognized IICRC drying standards.
Truck-mounted, portable, and submersible for any size loss.
The loss is documented and billed to the carrier directly.
Yes. Sewage is classified as category 3 water because it can carry bacteria and other contaminants. Anything porous it touches, like carpet or drywall, is typically removed rather than cleaned, and the area is sanitized before it is considered safe.
Many neighborhoods still have original clay or cast-iron laterals from the 1920s through 1940s. Age, tree roots, and grease narrow those lines, and a heavy atmospheric-river storm can push more stormwater into the system than it can handle, forcing sewage back up through the lowest drains.
Generally no. Sewage-contaminated carpet and pad cannot be sanitized reliably enough to keep and are removed and disposed of as part of the cleanup.
Yes. Sewage backup areas should be kept clear of children and pets, and standing water should not be touched without protective equipment, since it is treated as a contamination hazard.
Many homeowner policies cover sudden sewage backups, sometimes under a specific backup endorsement. Extraction, disposal, and sanitizing are documented in detail to support whichever coverage applies.
San Mateo crews are on call 24 hours a day, local and fast, and can be on the way within the hour.
Call (650) 281-0978