Sewage is grossly contaminated (Category 3) water. A backup calls for professional cleanup and a plumber to fix the cause. Here's how that plays out in Sebastopol, what to do right now, and how to reach an independent, licensed local provider. Call (628) 336-1777 any time, or use the form on this page.
Sewage backup cleanup in Sebastopol: what we see
Sebastopol's older homes and big trees mean older laterals and root intrusion, while many west county homes outside town are on septic systems that suffer in saturated winter soils.
The local picture
House age and sewer laterals. The age of the house is a good guide to the age of the lateral. Sebastopol has many older homes over crawlspaces, plus rural west county properties.
Lot, slope and trees. Long laterals, steep runs and big trees all raise the odds of trouble. Sebastopol spans rolling west county hills that drop to the low ground of the Laguna de Santa Rosa on the east side.
Neighborhoods include downtown, neighborhoods along the Laguna, and the surrounding west county hills. Conditions vary from street to street, so a provider should look at your specific home rather than assume.
What to do right now
- Keep everyone, especially children and pets, out of affected areas.
- Stop using water: no flushing, showers, dishwasher or laundry.
- Don't touch sewage without boots, gloves and eye protection.
- Photograph the damage for insurance.
- Call a plumber for the cause and a restoration provider for cleanup.
Want a local pro to take a look?It's free for homeowners and there's no obligation.
Sebastopol checklist
- Have the lateral or septic system checked if drains slow down.
- Find your sewer cleanout so a plumber can reach the lateral quickly.
- Have the lateral camera-inspected if you have big trees and an older home.
- Keep grease and wipes out of drains.
- Check whether your policy has a sewer or water backup endorsement.
Local resources for Sebastopol
- Permits: City of Sebastopol (Permit Sonoma outside city limits)
- Emergency alerts: SoCoAlert, the County's free notifications
- Sandbags: Sonoma County sandbag locations, updated during weather events
- Contractor licenses: CSLB license check
How a provider handles it
Cleanup involves containment, extraction, removal of porous materials the sewage touched, cleaning and disinfection of hard surfaces, and documented drying before any rebuild. For the full picture, read our complete guide and the deep dive After a flood: cleanup safety. We also have a storm-season article: How to use sandbags.
Before you hire anyone, check the license on the CSLB site. Here's how we vet providers.
Dealing with this right now?Tell us what's happening and we'll connect you with an independent local provider.
More for Sebastopol
- Water damage in Sebastopol: our full local page
- Sewage backup cleanup service
- Laguna de Santa Rosa flooding in Sebastopol: our in-depth local guide
- Burst pipe water damage in Sebastopol
- Crawlspace flooding in Sebastopol
- Storm and flood damage in Sebastopol
- Appliance and water heater leaks in Sebastopol
- Same problem nearby: sewage backups in Santa Rosa, sewage backups in Forestville, sewage backups in Rohnert Park & Cotati
- Sewage backup cleanup in every Sonoma County town
Sources
- SoCoAlert sign-up
- Sonoma County sandbag locations
- FEMA Flood Map Service Center
- CDC: flood safety
- CSLB license check
Sources checked October 18, 2026.
Frequently asked questions
Can I clean up a sewage backup myself?
Most backups call for professional cleanup because sewage is grossly contaminated.
Does homeowners insurance cover sewage backups?
Often only with a specific water backup endorsement. Check your policy.
Can I clean it myself?
Most sewage backups call for professional cleanup because of contamination. See categories of water.