A sewer backup is one of the worst things that can happen in a home. It is stressful. It is unsanitary. And it gets worse the longer it sits. Every hour, contamination spreads further into floors, walls, and air.
One Call Services has been handling these jobs in Fremont since 2012. We answer the phone 24 hours a day, 7 days a week, including holidays. Our IICRC-certified team (IICRC #163618) responds within 60 minutes inside our Fremont service area. We arrive with full personal protective equipment and the right tools to make your home safe again.
Call (510) 394-1606 now. Free inspection, 24/7.
What Is Cat 3 (Black Water)?
Sewage is always Cat 3 (black water). It is the most dangerous of the three water damage categories.
- Category 1 (clean): From a supply line or a sink overflow. Low risk.
- Category 2 (gray): From a dishwasher or washing machine. Some contaminants.
- Category 3 (black): From a backup, a toilet overflow with waste, or floodwater. Contains bacteria, viruses, and parasites.
Cat 3 (black water) cannot just be dried up. The contamination has to be contained, removed, and disinfected. Most porous materials it touches need to come out. That includes carpet, padding, and lower drywall. We follow the IICRC S500 standard for every job.
Health Hazards of Sewage Backups
Untreated waste water can carry bacteria, viruses, and parasites. These can cause stomach illness, skin infections, and breathing issues. Kids, pets, and anyone with a weak immune system should stay out of the affected area until the job is finished.
Cleaning up without proper protective equipment is not a good idea. Bleach and a mop do not get the job done. Bacteria can live deep in the subfloor and behind walls. They keep growing in damp, dark places. Professional help is the only way to make sure your home is actually safe.
Our Sewage Cleanup Process
Here is what happens when you call us out.
Step 1: Containment and PPE
Our crew shows up in full personal protective equipment. We seal off the affected area so the contamination does not spread to the rest of the house. HEPA air scrubbers run from the moment we arrive. They keep the air clean during the job.
Step 2: Sewage Removal and Extraction
We pump out standing waste water. Then we extract anything that has soaked into carpet, padding, and porous flooring. Solids and contaminated water are bagged and hauled off the property.
Step 3: Demolition of Unsalvageable Materials
Anything that is too contaminated to clean has to come out. That usually means saturated drywall (at least the bottom two feet), carpet, padding, and any wet insulation. We cut clean lines so the rebuild later is straightforward.
Step 4: Cleaning and Disinfection
Every surface that touched contaminated water gets cleaned. We treat each surface with professional-grade disinfectants. We follow industry protocols for matching the right product to the right material.
Step 5: Structural Drying
Once the cleaning is done, we set up air movers, dehumidifiers, and thermal imaging equipment. We check moisture readings daily. We do not pack up until everything is back to normal levels.
Step 6: Sanitization and Odor Removal
Final step. We treat the area to neutralize odors. Your home should not smell like a backup six months from now.
Common Causes of Sewage Backups in Fremont Homes
The most common causes we see in Fremont:
- Tree roots growing into older sewer lines. This is common in homes built before the 1980s.
- Main line blockages from grease, wipes, or other items flushed down toilets.
- Municipal sewer overload during atmospheric river storms. When the city sewer cannot keep up, water backs up into homes.
- Broken or collapsed pipes. These are usually in older clay or cast iron lines.
- Septic system failure. This applies to homes outside the city sewer system.
Sewage Backups and Mold
Untreated waste water damage leads to mold within 24 to 48 hours. The conditions are exactly what mold needs to grow: wet, dark, organic material on porous surfaces. If you are dealing with a backup that has been sitting for more than a day, plan on mold being part of the job. We handle the follow-up mold remediation piece too.
Working With Your Insurance
Coverage is one of the trickier parts of homeowner’s insurance. Most standard policies do not cover this kind of backup by default. You usually need a separate sewer or water backup rider. If you have that rider, the work is typically covered. If you do not, the claim may be denied.
We work with your adjuster either way. We document everything with photos and moisture readings. We bill insurance directly when coverage applies. We cannot promise what your insurance will cover, but we give them everything they need to decide quickly.
Our Service Area
We are based at 3269 Seldon Ct in Fremont. Our crews cover the surrounding Bay Area within about 30 miles. That includes sewage cleanup in Hayward, Newark, and Union City. For other water emergencies, see our water damage restoration page.
Call Now — 24/7 Sewage Cleanup in Fremont
Waste water does not get better with time. Call (510) 394-1606 anytime. We answer 24/7. Free inspection. IICRC-certified. We bill insurance directly. Not an emergency? Contact our team to schedule an inspection.
Frequently Asked Questions
How fast can you respond to a sewage backup?
Within 60 minutes inside our Fremont service area, 24 hours a day, 7 days a week, including holidays. Call (510) 394-1606.
Is sewage water dangerous?
Sewage is Cat 3 (black water). It carries bacteria, viruses, and parasites that can cause illness. Keep kids, pets, and anyone with a weak immune system out of the affected area until the job is done.
Will my homeowner’s insurance cover sewage backup?
Sometimes. Many policies require a separate sewer or water backup rider for this to be covered. We work directly with your adjuster to file the claim and document everything they need.
Can I clean up the sewage myself?
We do not recommend it. Bleach and a mop do not kill what is in waste water. The contamination spreads deeper into floors and walls than you can see. Without proper protective equipment, you risk exposure to bacteria, viruses, and parasites. Professional help is the only way to make sure your home is actually safe.
Do you disinfect after cleanup?
Every affected surface is cleaned with professional-grade disinfectants. We run a full sanitization step at the end of every job.
How long does sewage cleanup take?
Most jobs take 4 to 7 days for the drying portion after the extraction and demolition are done. Total project length depends on how much damage there is and whether reconstruction is needed.
Do you offer Spanish-speaking technicians?
Our team is bilingual in English and Spanish.
From Our Customers
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