At the street, stop 2 of 6

Who owns the sewer line under your yard?

In Columbia Water’s area, you are responsible for the sewer line up to the property line, and the city maintains it from there to the main¹. Other utilities may split it differently, so ask the one named on your bill.

Stand on the sidewalk or at the curb and look back at the house, along the route your sewer line probably takes.

Updated November 4, 2026, Midlands House Walk

Crushed and flaking black end of an old pipe lying on grass and red clay — A dug-up length of old fiber sewer pipe, crushed and flaking. When a line fails, where the break sits on the lot decides whose job it is.

Curving residential street lined with low brick houses and tall trees — Brick ranches on a curving street in Raleigh, North Carolina, built much like many here. Your lot probably ends somewhere short of the pavement.

Where your lot stops

Look for: Find your property line on a plat or survey. A sidewalk or grass strip often sits past it, so the curb is a poor guide.
What it tells you: Columbia Water’s split falls at the property line, not at the curb¹. If the exact spot matters for a repair, ask the utility how it reads the line on your street.

Round dark threaded cap in grass where the lawn meets a mulched bed — A cleanout cap in a lawn. It tells you where the pipe runs, and nothing about who is responsible for that spot. AI-generated picture.

A cleanout is not a boundary

Look for: Note where your cleanout sits, near the house or near the street, and take a photo for the plumber.
What it tells you: Its position doesn’t move the ownership line. Columbia Water puts sewer lines on private property with the property owner², wherever the cap happens to be.

Row of older frame houses with a sidewalk and overhead wires along the street — Older frame houses on Reid Street in Rock Hill, north of the Midlands. Houses on a street like this send their waste to a shared main.

Trouble on the whole street

Look for: Ask the neighbors. See whether they had a backup the same day, and look for sewage on the ground near the street.
What it tells you: Shared trouble points away from your line and toward the public side. An overflow is a blockage or unexpected water backing up the lines, and Columbia Water wants it reported right away with an address or cross streets³.

Do you need the line coverage offered in the mail?

Columbia Water’s page on those plans says optional coverage is not required². Read what a plan excludes before you decide, and remember that roots near the line are the kind of claim worth asking about.

Yours to do

Read the name on your bill, then ask that utility where its side ends at your address. The town-by-town table shows what is confirmed.
Ask a plumber to show you on camera where a break sits, and keep the recording or notes.
Keep grease out of the line: cool it in a jar or can and put it in the trash⁴.

For a licensed pro

Digging up and repairing a broken stretch on your side. Columbia Water says it cannot repair private lines¹.
Finding a break with a sewer camera, which also shows which side of the line it falls on.
Permit and license questions go to the offices listed on the who-to-call page.

Where this comes from

Keep walkingTree roots and the sewer line