Public water system record
Town of Castle Rock
Serves Castle Rock, Douglas County, CO · 106,822 people served
Federal records show no health-based violations and 9 monitoring/reporting issues for Town of Castle Rock in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 9
Key facts
- Town of Castle Rock draws water from 77 wells and 2 surface water intakes.
- Record on file since 1999, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 26,790 service lines.
Check whether Town of Castle Rock serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2025 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2025 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2019 | Resolved |
Full record since 1999
EPA's records for Town of Castle Rock go back to 1999. Before October 19, 2016 they list no health-based violations and 10 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 1 |
| 2000s | 0 | 7 |
| 2010 to October 18, 2016 | 0 | 2 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 8 |
Where the water comes from
Town of Castle Rock draws water from 77 wells and 2 surface water intakes. It also buys water from Parker WSD. It also has emergency connections to Pinery WWD and Castle Pines Village MD. 4 other community water systems buy water from Town of Castle Rock. 2 other public water systems have emergency connections to Town of Castle Rock.
Buys water from
- Parker WSD Parker, CO
Emergency or part-time connections to
- Pinery WWD Parker, CO
- Castle Pines Village MD Castle Rock, CO
Community systems that buy water from it
- Castle Park MHP Loveland, CO
- Dominion WSD Greenwood Village, CO
- Gold Rush WC Florissant, CO
- McDonald Farms Enterprises Inc Denver, CO
Annual water quality report
Town of Castle Rock must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Colorado.
Certified drinking water labs by state EPA guidance for private wells