Sewage & biohazard · Emergency service
Sewage & Biohazard Cleanup in San Francisco, CA
Sewage backups, contaminated floodwater and other biohazards are Category 3 losses. They need protective equipment, removal of porous materials that were touched, cleaning and disinfection of everything else, and careful drying.

Sewage & Biohazard Cleanup in San Francisco: local conditions
Partner coverage for sewage and biohazard cleanup in San Francisco currently includes 50 ZIP codes: 94102, 94103, 94104, 94105, 94107, 94108, 94109, 94110, 94111, 94112, 94114, 94115, 94116, 94117, 94118, 94119, 94120, 94121, 94122, 94123, 94124, 94125, 94127, 94128, 94129, 94130, 94131, 94132, 94133, 94134, 94137, 94139, 94140, 94141, 94142, 94143, 94144, 94145, 94146, 94147, 94151, 94158, 94159, 94160, 94161, 94163, 94164, 94172, 94177, 94188. If your ZIP is on this list, a call connects you with a company that serves it.
Atmospheric river storms, like the 2022–23 series, cause roof leaks and flood low-lying streets.
Victorians and Edwardians have plaster walls, original wood and older plumbing, while Sunset and Richmond row houses share walls and often have ground-floor garages converted to living space. Many homes have been divided into flats or have added in-law units, so leaks often affect more than one household.
Licensing in California: California requires contractors on jobs of $500 or more (labor and materials) to be licensed by the Contractors State License Board (CSLB). Check the license on the CSLB website.
What you can expect
- One call connects you with an independent restoration company that serves your ZIP code.
- Fast call-back during business hours
- Serving San Francisco, CA
- Photo and moisture documentation for insurance
Sewage & Biohazard Cleanup at a glance
- Category
- Sewage & biohazard
- Emergency service
- Yes, call for fastest response
- Typical first step
- Protect people and contain the area
- Area
- San Francisco, CA
Other risks in San Francisco
Fog and moisture
Persistent fog in the Sunset and Richmond keeps homes damp, encouraging mold.
Earthquakes
Earthquakes can break pipes and water heaters; the 1989 Loma Prieta quake damaged buildings across the city.
Street-level units
Garages and in-law units below street level take on water during heavy rain.
Older plumbing
Victorian and Edwardian homes often have aging galvanized supply lines and cast-iron drains.
Signs you need sewage & biohazard cleanup
- Water or waste coming up through floor drains, toilets or tubs
- A strong sewage smell in a basement or bathroom
- Floodwater that entered the home from outside
How the work is done
Protect people and contain the area, then Remove contaminated water, then Remove porous materials, then Clean and disinfect, then Verify and rebuild. See the full sewage & biohazard cleanup process.
What affects the cost
Prices depend on the job, so restoration companies in San Francisco quote after an assessment. The main drivers are how much area is affected, how long it stayed wet, and what has to be removed or rebuilt. See the full list of sewage & biohazard cleanup cost factors.
Sewage & Biohazard Cleanup questions
Do I need a permit for repairs in San Francisco?
Structural, plumbing and electrical repairs need permits from the San Francisco Department of Building Inspection.
How do I verify a California contractor?
Search the Contractors State License Board (CSLB) license lookup.
Can I clean up a small sewage backup myself?
A small backup on a hard, non-porous floor sometimes can be with gloves, boots and disinfectant. Anything that reached carpet, drywall or other porous materials needs professional cleanup.
Does homeowners insurance cover sewage backups?
Usually only with a sewer or drain backup endorsement. Flooding from outside needs a flood policy.
Related pages
Other services in San Francisco
Sewage & Biohazard Cleanup in nearby cities
More about water and storm damage in San Francisco, or see sewage & biohazard cleanup nationwide.
Related services

Sewage backup cleanup
Sewage cleanup treats the water as Category 3 (grossly contaminated): crews in protective gear remove it, discard porous materials it touched, clean and disinfect hard surfaces, and dry the structure.
Learn more
Biohazard cleanup
Biohazard cleanup removes and disposes of blood, bodily fluids and other potentially infectious material, then cleans and disinfects the area so it's safe to use.
Learn more
Flood damage cleanup
Flood cleanup treats outside floodwater as contaminated: it removes water and mud, cuts out wet drywall and insulation above the waterline, sanitizes, and dries the structure.
Learn moreWater, mold or fire damage? Get the right crew on it.
One call connects you with an independent restoration company that serves your ZIP code. Fast call-back during business hours.
