Frederick's sewer is handled by St. Vrain Sanitation District, which treats the building sewer line as the property owner's responsibility. Replacing it is the answer when that line has sagged, broken or filled with roots past the point of a simple repair. Call the number on this page to be connected with a local plumber in Frederick.

Signs a full replacement may be needed
- Clogs in the main line that keep returning
- The lowest drain in the house is the first to back up
- Toilets bubble when the washer or tub empties
- A sewer smell near the cleanout, or a sunken or soggy strip of yard
- Camera video showing a long belly, a collapse or damage at several joints
In many Frederick homes the cause is one sag or one damaged section, which can be dug up and repaired by itself. A full replacement is the call when the camera shows trouble along the whole line.
Frederick's sewer district and housing
St. Vrain Sanitation District, established in 1986, serves the City of Dacono, the towns of Firestone and Frederick, parts of Mead and unincorporated Weld County within its boundaries. Its treatment plant sits on Weld County Road 26 between roads 13 and 15. The district says the building sewer line belongs to the property, not the district, and it keeps 24-hour staff for sewer backups at (303) 776-9570. If neighbors are backing up too, call the district first.
Frederick began as a coal-mining town, founded as McKissick and renamed for Frederick A. Clark in 1907, and it is one of the Carbon Valley Tri-Towns with Firestone and Dacono. The older blocks near the original town center are where you're most likely to find aging clay or cast iron pipe. Much of Frederick, though, is newer family housing, and plastic sewer pipe in those homes tends to fail from soil settling after construction or from later digging for fences, decks or sprinklers.
What affects the cost
- Length and depth of the building sewer to the district main
- Method: trenchless where the line keeps its slope, a trench where it has bellied
- Fences, patios, landscaping and irrigation along the route
- Whether a section repair will do instead of the full length
- Town permit and inspection
After you call
You'll be connected with an independent local plumber who works in Frederick. A camera inspection normally comes first, since the material, depth and location of the damage decide the method. The Town of Frederick Building Department, at 401 Locust Street, handles permits and inspections; inspections may be done by Town staff or its inspection partner CAA. Frederick inspectors may verify the identity of the plumber listed on the permit at inspection and can fail an inspection until that's done, so the plumber of record should be the one doing the work. The permit technician is at 720-382-5516.
Sewer Line Replacement questions in Frederick
Where does my responsibility for the sewer line end?
Should I call the utility or a plumber first when sewage backs up?
Why would a fairly new home need its sewer line replaced?
Who issues the permit for a sewer line replacement here?
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