Inside Lyons town limits, homes are on the Town water system drawn from North St. Vrain Creek, so a hidden leak usually shows up as rising usage or a meter that will not stop. A plumber can test the plumbing in sections and find the source. Call the number on this page to be connected with a local plumber in Lyons.

About Lyons
Lyons is a small foothills town in northern Boulder County where North and South St. Vrain Creeks meet, ringed by red sandstone hills. The Town provides water and wastewater service inside town limits, drawing water from North St. Vrain Creek and treating it at its own plant. Properties with a Lyons address outside town limits may have a different setup, which we could not verify.
Steps to take right away
- Turn off every faucet, appliance and the sprinkler controller.
- Read the meter, wait an hour without using water and read it again.
- Dye-test each toilet tank for a silent flapper leak.
- If water is spraying or pooling, close the main shutoff.
- For a water emergency after hours, the Town directs callers to 303-441-4444; utility billing is 303-823-6622 ext. 10.
- Photograph any stains or wet areas and note when they started.
Symptoms and likely causes
| Symptom | Likely cause |
|---|---|
| Meter moves with the house idle | Leak past the meter |
| Soggy ground toward the house | Break in the buried service line |
| Drips in a crawl space after cold weather | Freeze-cracked pipe or fitting |
| Ceiling stain below a bathroom | Shower valve or supply connection |
| Toilet refills on its own | Worn flapper or fill valve |
| Usage spike in summer | Sprinkler line or valve |
Cost factors
- How long it takes to isolate the leaking section
- Rocky foothill soil that makes digging slower
- Whether the leak is in the yard, a crawl space, a slab or a wall
- The repair and any permit through the Town of Lyons Building Department, which SAFEbuilt runs under contract
The Town's pages say residents are responsible for the sewer line from their property, but they do not spell out where the Town's side of the water service line ends. If water is coming up near the meter or in the street, call the Town first. Inside town limits, Boulder County has no building code jurisdiction, so permits go through the Town's SAFEbuilt-run department, not the county. Foothills winters are cold, and freeze damage in crawl spaces and exterior walls is a common source of leaks that only show after the thaw.
Leak Detection questions in Lyons
Who do I call if water is coming up at the meter pit or the street?
Do I need a permit to repair the leak once it is found?
Can a winter freeze cause a leak I don't notice until spring?
Could the sprinkler system be where my water is going?
More plumbing services in Lyons
Leak Detection nearby
Helpful guides
Sources
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