Castle Rock Water, the town-owned utility, draws mostly on deep Denver Basin groundwater wells, but those pumps belong to the town, so homes on town water have no well pump of their own. When pressure drops, a plumber can check the regulator, the service line and the fixtures. Call the number on this page to be connected with a local plumber in Castle Rock.
Town wells, not yours
Castle Rock is the Douglas County seat, named for the butte north of downtown. Its water utility relies mostly on deep wells in the Dawson, Denver, Arapahoe and Laramie-Fox Hills aquifers, plus renewable supplies from shallow alluvial wells, Plum Creek diversions, imported WISE water and reuse water. The Plum Creek Water Purification Facility is the main plant, with the Founders, Meadows and Ray Waterman plants adding capacity at peak demand. Castle Rock Water uses chloramine and reports average hardness of about 100 ppm, described as moderately hard. Castle Rock Water also runs a separate Bell Mountain Ranch system, and some areas with Castle Rock mailing addresses, such as The Village at Castle Pines, are served by other districts.
What to do now
- Check with neighbors. If the whole street is dry, it's likely a utility issue.
- Report street-side leaks. Call Castle Rock Water at 720-733-6000, pressing 1 after hours.
- Test a few fixtures. Weak flow at one faucet usually means a clogged aerator; weak flow everywhere points upstream.
- Look at the regulator. Drips or a hissing sound near where the main enters the house suggest it's failing.
- Close the main valve if you find an active leak inside.
Symptoms and what they usually mean
| Symptom | Likely cause |
|---|---|
| Pressure falling at every tap | Regulator wearing out or a service line leak |
| White scale on fixtures | Moderately hard water buildup |
| Sudden total loss | Main break, utility work or a closed valve |
| Pressure spikes at night | Regulator not holding its setting |
| Wet patch in the yard | Leak on the service line |
What drives the cost
- Regulator, valve or fixture work versus a buried line repair
- Scale removal or replacing scaled cartridges
- Line depth and what sits on top of it
- Water treatment choices: Castle Rock Water doesn't recommend softeners because of the salt they add to wastewater, which may steer you toward other options
- Permits from the Town of Castle Rock building department, where required
If you live in a Castle Rock-addressed area served by another district, call that district first instead.
Castle Rock Water's FAQ lists hardness between 6.6 and 10.8 grains per gallon, so scale on aerators, showerheads and water heater parts is common. Cleaning or replacing scaled parts is often part of solving a pressure complaint here.
Well Pump Repair questions in Castle Rock
My water utility pumps from wells. Does that mean I have a well pump?
Who do I call if the problem is on the utility side?
My pressure dropped and I am on public water. Could a pump be to blame?
How can I tell if my house is on a well or on public water?
More plumbing services in Castle Rock
Well Pump Repair nearby
Sources
Last updated: