CO0130045 · Colorado

HIDDEN VALLEY WATER DISTRICT

Federal fiscal 2026Q3 · EPA violation and follow-up records

Violation records shown: 13
EPA health-based flag: 2
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 11

Counties listed by EPA · Jefferson County, Colorado

Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.

Violations and what followed

Among 13 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 30 days. The interval uses the reporting periods and dates on file.

Monitoring or reporting · Resolved

LSL ReportingViolation 4008750 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule Revisions

Noncompliance period start October 17, 2024 · period end November 15, 2024 · first reported November 14, 2024 · EPA return-to-compliance field November 15, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031028	November 7, 2024	Informal	State Violation/Reminder Notice
4031029	November 7, 2024	Informal	State Public Notification requested
4031030	November 15, 2024	Resolving	State Compliance achieved

EPA health-based flag · Resolved

LSL InventoryViolation 4008749 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule Revisions

Noncompliance period start October 17, 2024 · period end November 15, 2024 · first reported November 14, 2024 · EPA return-to-compliance field November 15, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031026	November 7, 2024	Informal	State Violation/Reminder Notice
4031027	November 7, 2024	Informal	State Public Notification requested
4031030	November 15, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 4008747 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start February 1, 2024 · period end February 29, 2024 · first reported May 16, 2024 · EPA return-to-compliance field February 29, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031017	March 14, 2024	Informal	State Violation/Reminder Notice
4031018	March 14, 2024	Informal	State Public Notification requested
4031024	March 27, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 4008746 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start February 1, 2024 · period end February 29, 2024 · first reported May 16, 2024 · EPA return-to-compliance field February 29, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031015	March 14, 2024	Informal	State Violation/Reminder Notice
4031016	March 14, 2024	Informal	State Public Notification requested
4031024	March 27, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 4008745 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start January 1, 2024 · period end January 31, 2024 · first reported May 16, 2024 · EPA return-to-compliance field January 31, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031013	February 15, 2024	Informal	State Violation/Reminder Notice
4031014	February 15, 2024	Informal	State Public Notification requested
4031024	March 27, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 4008744 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start January 1, 2024 · period end January 31, 2024 · first reported May 16, 2024 · EPA return-to-compliance field January 31, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031011	February 15, 2024	Informal	State Violation/Reminder Notice
4031012	February 15, 2024	Informal	State Public Notification requested
4031024	March 27, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 4008743 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start January 1, 2024 · period end March 27, 2024 · first reported May 16, 2024 · EPA return-to-compliance field March 27, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031009	February 15, 2024	Informal	State Violation/Reminder Notice
4031010	February 15, 2024	Informal	State Public Notification requested
4031024	March 27, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 4008741 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start December 1, 2023 · period end December 31, 2023 · first reported February 14, 2024 · EPA return-to-compliance field December 31, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031007	January 23, 2024	Informal	State Violation/Reminder Notice
4031008	January 23, 2024	Informal	State Public Notification requested
4031024	March 27, 2024	Resolving	State Compliance achieved
4031025	June 4, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 4008740 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start December 1, 2023 · period end December 31, 2023 · first reported February 14, 2024 · EPA return-to-compliance field December 31, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031007	January 23, 2024	Informal	State Violation/Reminder Notice
4031008	January 23, 2024	Informal	State Public Notification requested
4031024	March 27, 2024	Resolving	State Compliance achieved
4031025	June 4, 2024	Informal	State Public Notification received

EPA health-based flag · Resolved

Treatment Technique No Certif. OperatorViolation 4008736 · Stage 1 Disinfectants and Disinfection Byproducts Rule · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start December 1, 2023 · period end March 26, 2024 · first reported February 14, 2024 · EPA return-to-compliance field March 26, 2024

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030998	December 28, 2023	Informal	State Violation/Reminder Notice
4030999	December 28, 2023	Informal	State Public Notification requested
4031006	January 2, 2024	Informal	State Public Notification received
4031021	March 26, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 4008738 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start November 1, 2023 · period end November 30, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 30, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031002	December 28, 2023	Informal	State Violation/Reminder Notice
4031003	December 28, 2023	Informal	State Public Notification requested
4031024	March 27, 2024	Resolving	State Compliance achieved
4031025	June 4, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 4008737 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start November 1, 2023 · period end November 30, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 30, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031000	December 28, 2023	Informal	State Violation/Reminder Notice
4031001	December 28, 2023	Informal	State Public Notification requested
4031024	March 27, 2024	Resolving	State Compliance achieved
4031025	June 4, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 4008742 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2023 · period end December 31, 2023 · first reported February 14, 2024 · EPA return-to-compliance field December 31, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4031007	January 23, 2024	Informal	State Violation/Reminder Notice
4031008	January 23, 2024	Informal	State Public Notification requested
4031024	March 27, 2024	Resolving	State Compliance achieved
4031025	June 4, 2024	Informal	State Public Notification received

EPA data and scope

How to read the records

The enforcement snapshot is federal fiscal 2026Q3. The EPA archive labels its violation file October 13, 2026. EPA says federal reporting can lag by several months. For current advisories, check your utility or local drinking-water authority.

We matched active community water systems by public water system ID between EPA’s system search and SDWIS inventory. We show violations with a recorded noncompliance, initial reporting or return-to-compliance date from 2021 onward, plus earlier records listed as Addressed or Unaddressed.
EPA’s health-based flag identifies violations of contaminant or disinfectant limits or treatment requirements. Monitoring and reporting violations describe required tests or reports. Neither category measures household exposure.
Addressed means EPA records formal enforcement on a violation that remains unresolved in the snapshot. Unaddressed means no formal action is recorded for an unresolved violation. Resolved can mean compliance was restored, the rule ceased to apply, or further action was unnecessary. Archived is a separate status.
We count a violation once per water system and group its distinct linked actions. Conflicting records are set aside. Places are EPA-listed search locations and can include mailing locations. Use the provider name and system ID to identify your service.

EPA data dictionary and files · EPA reporting and enforcement FAQ · Find an annual water quality report · How to get the report from your utility