Castle Rock Water Quality
Colorado
According to EPA SDWIS, Castle Rock, Colorado is served by 8 community water systems covering about 119,180 people. The same extract lists 37 health-based violation records, most recently coded 4010 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Castle Rock, Colorado is delivered through 8 EPA-regulated community water systems serving an estimated 119,180 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 37 violation records across the 8 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 3 distinct EPA contaminant codes: Combined Radium (-226 and -228), Stage 1 Disinfectants and Disinfection Byproducts Rule, Lead and Copper Rule. 2 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Colorado drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| CASTLE ROCK TOWN OF | 110,298 | 0 | Clean |
| CASTLE PINES VILLAGE MD | 5,656 | 0 | Clean |
| CONSOLIDATED BELL MTN RANCH MD | 1,162 | 0 | Clean |
| ACADEMY WSD | 750 | 1 | Health |
| KINGSWOOD PLAZA MHC LLC | 450 | 0 | Clean |
| BEVERLY HILLS MUTUAL WC | 325 | 1 | Health |
| SILVER HEIGHTS WSD | 301 | 0 | Clean |
| LOUVIERS WSD | 238 | 35 | Health |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-10-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-10-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-10-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-07-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-07-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-07-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-04-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-04-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-04-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-01-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-01-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-01-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2024-01-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2023-10-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2023-10-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2023-10-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2023-10-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2023-07-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2023-07-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2023-07-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2023-04-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2023-04-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2023-04-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2023-04-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2021-10-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2021-01-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2020-10-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2020-07-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2020-04-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2020-01-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2019-10-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2019-07-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2019-04-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2019-01-01 |
| LOUVIERS WSD | Combined Radium (-226 and -228) | 2018-10-01 |
| BEVERLY HILLS MUTUAL WC | Stage 1 Disinfectants and Disinfection Byproducts Rule | 2018-04-01 |
| ACADEMY WSD | Lead and Copper Rule | 1997-01-01 |
What are Castle Rock's health-based records for?
Castle Rock's health-based violation records carry 3 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Combined Radium (-226 and -228) | 35 | 1 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 1 | 1 |
| Lead and Copper Rule | 1 | 1 |
TRI Facilities in Castle Rock
| Facility | Total Releases |
|---|---|
| Holcim Wcr Inc Castle Rock Ready Mix Plant | 482 lbs |
| Smyrna Ready Mix Concrete LLC - Castle Rock Ready Mix | 2 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Castle Rock, Colorado? ▼
How many water violations does Castle Rock have in this EPA extract? ▼
What contaminants were found in Castle Rock water? ▼
How many water systems serve Castle Rock? ▼
Where does Castle Rock get its drinking water? ▼
Are there pollution sources near Castle Rock? ▼
How does Castle Rock compare in Colorado?
Of the 313 Colorado places with at least one community water system on file, Castle Rock ranks #28 by number of systems (8).
Either side of it: Loveland (9), Buena Vista (8), Rocky Ford (8), Brighton (7)
About This Data
Figures here are the current EPA SDWIS extract joined to the 8 community water systems whose service area lists Castle Rock, ranked against the 313 Colorado places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.