Sewer Back-up – Emergency Restoration

Sewer Backup Cleanup & Restoration

24/7 Emergency Restoration Service in GTA - 45 Minutes Response Time

Serving Toronto, Markham, Richmond Hill, Vaughan, Stouffville, Scarborough, Pickering, Whitby, Oshawa & surrounding areas

Clogged Toilets - Toilet Overflow - Sewage Backflow into Toilet - Blocked Drain Lines - Excess Toilet Paper or Foreign Objects - Flooded Bathroom from Toilet Backup - Contaminated Water from Toilet Overflow

A sewer backup is one of the worst problems a home or business can face. Dirty water can come back up through your drains, toilets, or basement floor. It smells bad, spreads germs, and can damage floors, walls, and furniture.

A sewer backup happens when wastewater cannot flow out of your home through the sewer line. Instead, it flows back inside your property.

If this happens, you need help right away.

At Oncall Restoration, we provide fast sewer backup cleanup and water damage restoration for homes and businesses across Markham, Richmond Hill, Vaughan, Stouffville, Scarborough, Toronto, Pickering, Whitby, and Oshawa.

Our trained restoration team arrives quickly, removes contaminated water, cleans the area, and restores your property safely.

What our customers say

Last week We had a big flood in our apartment building, and 4 of our apartments got effected,we found ONCALL RESTORATION online and they showed up in 30 Minutes and got the complete job done in 3 days . We are very pleased with their team

Arsh Ali

Best restoration Toronto company for water damage and mold removal.they dried water from our medical office and did mold remediation That was caused by water damage. Very clean and professional team.

Mikki

We are very pleased with the service provided by Oncall Restoration. They performed beyond what they had expected. They were on time and followed the schedule they had presented. There were no surprises or snags We high recommend Oncall.

Jack Brass

We Work with Major Insurance Companies

Common Causes of Sewer Backup

Many things can block or damage sewer lines. The most common causes include:

Tree Roots - Tree roots grow into underground pipes and block the flow of wastewater.
Pipe Damage - Old, cracked, or collapsed pipes can cause sewage to back up.
Heavy Rain or Storms - When city sewer systems get overwhelmed, water may flow back into homes.
Grease and Debris - Grease, wipes, and other materials can clog pipes over time.
Flooded Basements - Floodwater can push sewage back through basement drains.

If you notice gurgling drains, slow drainage, or bad smells, it may be a warning sign.

Why Sewer Backup Is Dangerous?

Sewer water is known as black water, which is the most contaminated type of water damage. This dirty water can contain harmful bacteria, mold spores, chemicals, and other debris and waste. Because of these dangerous contaminants, sewer backup water can pose serious health risks if it is not cleaned and disinfected properly. When sewage enters a home or business, it can quickly create unsafe living conditions and cause significant property damage.

It can lead to several problems, including:

Serious health risks for people and pets
Exposure to harmful bacteria and viruses
Mold growth within 24–48 hours if the area is not dried properly
Structural damage to floors, drywall, and building materials
Strong, unpleasant odors that can linger in the property

Trying to clean sewage on your own can expose you to harmful bacteria and unsafe conditions. That is why professional sewer backup cleanup is critical to safely remove contamination and restore your property.

Our Sewer Backup Cleanup Process

At Oncall Restoration, we follow a proven restoration process to protect your property.

Emergency Response - Our team responds quickly to stop the damage and assess the situation.
Contaminated Water Removal - We safely remove sewage water using professional extraction equipment.
Deep Cleaning & Sanitization - All affected areas are disinfected to remove bacteria and germs.
Drying & Dehumidification - We use powerful drying equipment to prevent mold growth.
Restoration & Repairs - Damaged flooring, drywall, and materials are repaired or replaced.

Our goal is to restore your home or business safely and quickly.

When Should You Call a Sewer Backup Restoration Company?

Sewer backup problems can get worse very quickly. What may start as a small drainage issue can turn into a major contamination and water damage problem within hours. Because sewage water contains harmful bacteria and waste, it is important to call a professional restoration company as soon as you notice any warning signs. Quick action can help protect your health, prevent further damage to your property, and reduce the overall cost of cleanup and repairs.

You should call a sewer backup restoration company immediately if you notice:

Sewage coming from drains – Dirty water flowing back through sinks, toilets, or floor drains is a clear sign of a sewer blockage.
Basement flooding with dirty water – Sewage often backs up into basements first, especially during heavy rain or sewer line problems.
Strong sewer odors inside the property – A persistent sewage smell may indicate a hidden backup or damaged sewer line.
Multiple drains backing up at the same time – If several drains in your home or building are slow or backing up together, it could mean a main sewer line blockage.
Water around basement floor drains – Water pooling near basement drains can be an early warning sign of a sewer backup.

If you notice any of these signs, it is important to act quickly. Fast professional cleanup can reduce property damage, prevent mold growth, and lower restoration costs.