Understanding Sewer Collection Systems: Who’s Responsible for What?

Sewer backups are more than just an inconvenience—they can cause extensive damage to homes and create serious health hazards. Unfortunately, when these incidents occur, many homeowners are left wondering who is responsible for fixing the problem. Cities and municipalities often deny liability, shifting the burden onto homeowners, even when the law says otherwise.

In Oklahoma, the legal responsibility for sewer lines is divided between homeowners and the City. However, there is often confusion—sometimes intentional—about where the City’s responsibility begins and ends. Let’s break down how a sewer collection system works and clarify who is responsible for what.

How a Sewer Collection System Works:

A sewer collection system is designed to carry wastewater from homes and businesses to a treatment facility. The system consists of several key components:

• Lateral Line (Private Side): This is the pipe that connects a home’s plumbing to the City’s sewer system. It runs from the house to the edge of the homeowner’s property and continues to where it connects with the City’s infrastructure.
• Lateral Line (Public Side): Once the lateral line crosses into the public right-of-way—whether that’s an easement, alley, or under the street—it becomes the City’s responsibility.
• Main Sewer Line: This is the large pipe that collects wastewater from multiple homes and businesses and transports it to the City’s treatment facility. The City is fully responsible for maintaining and repairing the main line.

Homeowner vs. City Responsibility

Despite what the City may claim when denying a sewer backup or damage claim, Oklahoma law is clear:

• Homeowners are responsible for the lateral line on their property. This means that if a blockage or break occurs in the portion of the lateral that is within the homeowner’s yard, driveway, or under their house, the homeowner must pay for repairs.
• The City is responsible for the lateral line in the easement or under the street. Once the lateral extends beyond private property into a public right-of-way, the City must maintain and repair it. This also means that if a blockage occurs in this section, the City—not the homeowner—is responsible.
• The City is responsible for the main collection line. Any damage or blockage in the main sewer line falls squarely on the City.

Why This Matters:

Many homeowners assume that if sewage backs up into their home, the City will take care of the problem. Unfortunately, Cities frequently deny responsibility, even when the issue is in the portion of the lateral they are legally required to maintain. This can leave homeowners fighting an uphill battle to get their damages covered.

If you experience a sewer backup, it’s important to investigate the cause. A professional plumber can use a camera inspection to determine whether the issue is in your private lateral or the public section. If the blockage is in the City’s portion, you may have legal grounds to seek compensation for damages.

At Oklahoma Sewer Lawyers we help homeowners hold Cities accountable when they neglect their responsibilities. If you’ve experienced a sewer backup and believe the City is at fault, contact us to discuss your legal options.

After four years, residents in Oklahoma City have reached a settlement with a construction company. After their homes were damaged by muddy water caused by a nearby neighborhood under construction, they were left with no help or answers from the company. The homeowners were faced with class three water damage from the water, which in some cases according to Jim Buxton, there are not many options for homeowners to recover. With the help of Oklahoma Sewer Lawyers, these residents were able to settle and awarded damages.

When your house has been flooded with sewage and your home is ruined, you are in a complete and utter crisis.  So how do you determine the value of your case? What do you do? Well first call Oklahoma Sewer Lawyers, the #1 Lawyer in the #2 business. If you’re able to get your case settled, then YOU determine what it’s worth.

Once you gather all your information and once you come to us we will help understand your case’s worth. We will help you understand what the law provides. We will guide you through it and 9 out of 10 times we will help you get it resolved, whether it’s the city or the city’s insurance company.

However, in rare instances where an agreement on value cannot be reached we’re prepared. We will take the fight to the next level.  Entrusting your case to a jury and places the determination of value with impartial individuals. They will be able to assess the situation objectively.

If you feel you have a case leave information here. Let Us Help You!

Have you filed a claim with the city, and they have denied your claim? You are not alone, it’s a scary place to find yourself, but with the help from Oklahoma Sewer Lawyers, you can end up just like our clients, The Guinns. The Guinns were victims of the City of Oklahoma City’s failure to maintain and repair the sewer lines. Due to the city’s failure, their home was flooded with sewage, causing substantial damage to their property and creating a nuisance. When they asked the city of OKC for help, they were ignored and were told that the City was not at fault. The Guinns called us and we conducted a thorough investigation into the cause of the sewage flood and were able to show that the City of OKC was in fact responsible for the flood and resulting damage. The City of OKC did not want to face a jury trial, so they chose to resolve the matter for $95,000.00. This enabled Katie and Justin Guinn to repair their home and put this behind them.