Commerce City's sewer is run by South Adams County Water and Sanitation District, which separates its public system from the private sewer lines owned by property owners. A plumber clears the private part; the district handles its mains. Call the number on this page to be connected with a local plumber in Commerce City.

How sewer works in Commerce City
The city lists South Adams County Water and Sanitation District, known as SACWSD, as its water and sewer provider. SACWSD treats wastewater at its own Williams Monaco Wastewater Treatment Plant in Henderson rather than sending it to Metro Water Recovery. A few areas may be served by another district, such as Industrial Park Water and Sanitation, so check your bill.
SACWSD is unusually helpful on backups: it asks customers to call so it can help determine whether a blockage is in the public main or the private line, and it takes those calls at 303-288-2646 during and after business hours. The district also advises removing tree roots near sewer service lines, which is a strong hint about what causes many private-line clogs here.
Picking the right fix
| Situation | What a plumber usually does | Why |
|---|---|---|
| One slow fixture | Small auger through the drain or trap | The clog is close to the opening |
| Main line backing up | Machine cable from a cleanout | Reaches the full length of the service line |
| Roots in the service line | Cutter head, then a camera look | Shows whether the joint needs repair |
| Grease-coated kitchen line | Water jetting | Cleans the pipe wall, not just a hole |
Signs to watch for
- A floor drain in the basement taking on dirty water
- Toilets that gurgle when the washing machine drains
- More than one fixture slowing at once
- A sewer smell that does not go away after cleaning
- Plunging that buys only a day or two
Seasonal and timing notes
Roots grow most in the warmer months, so a service line that backs up every summer probably has an open joint that cleaning alone will not fix. Heavy rain can also expose a weak line. If you call SACWSD during a backup, they can help confirm whether the main is involved before you spend money on the private side. For repairs, Commerce City's Building Safety Division issues building permits; water heater replacement is one item it lists as possibly needing one, and Building Safety can confirm what a sewer repair requires at 303-289-3790. Ask the plumber to share camera footage so you can see the problem for yourself before approving repair work.
Drain Cleaning questions in Commerce City
Who do I call first when sewage backs up into the basement?
Will tree roots get into a sewer service line?
Who pays to fix the sewer line between my house and the street?
Is a camera inspection worth it after a main line clog?
More plumbing services in Commerce City
Drain Cleaning nearby
Helpful guides
Sources
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