Ontario's city-owned Ontario Municipal Utilities Company manages the gravity sewer lines, with treatment by the Inland Empire Utilities Agency, and the line from your house to that system is a plumbing job on your side. A sewer camera inspection films the pipe from the inside so you can see roots, cracks, sags or buildup and where they are. Call the number on this page to be connected with a local plumber in Ontario.

Who runs the sewer in Ontario?
The City of Ontario's own utility, the Ontario Municipal Utilities Company (OMUC), manages the city's gravity sewer lines, and the Inland Empire Utilities Agency treats the wastewater. If several houses on your street are backing up at once, that points toward the public line, and OMUC's Utilities Customer Service at (909) 395-2050 is a reasonable first call. If the trouble is only at your house, the problem is far more likely in your own drain, and that is where a camera earns its keep.
What is a camera likely to show in an Ontario house?
Ontario has a long building history. It was founded in 1881 by the Chaffey brothers as a planned, irrigated citrus colony, and its median home was built in 1980. That median sits between two very different groups. In older neighborhoods near downtown Ontario and along Euclid Avenue, laterals can be clay or cast iron, and footage there often shows root intrusion at joints, cracked sections or pipe that has shifted out of line. In the newer development of Ontario Ranch to the south, plastic pipe is the norm, and findings are more likely to be a belly where soil settled, a separated fitting or construction debris. Either way, slab foundations mean part of the drain runs under the house, which the camera can follow from a cleanout.
If the footage shows damage, what comes next?
First, get the defect located and marked on the ground, with a depth estimate, and keep a copy of the video. That lets you compare repair proposals side by side, whether a spot repair, a lining or a full replacement is offered. Repairs that go beyond clearing usually need a permit. The City of Ontario Building Department issues permits, with applications submitted electronically through its Citizen Portal Access website, and it can be reached at 909.395.2023. The plumber doing the work normally handles the application.
A local note
Earthquake country brings small ground movements over the years, and long-buried pipe can shift at a joint without anyone noticing until drains start to slow. A camera inspection after repeated clogs, or before buying an older Ontario home, gives you a record of the line's condition so you are not relying on guesswork.
Sewer Camera Inspection questions in Ontario
How can I tell which agency handles my sewer?
Will tree roots show up in the camera footage?
Can ground movement from earthquakes affect a sewer line?
Is it worth saving the video from the inspection?
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