CO0118030 · Colorado

LARKSPUR TOWN OF

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

Violation records shown: 29
EPA health-based flag: 4
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 23

Counties listed by EPA · Douglas 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 28 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 319 days. The interval uses the reporting periods and dates on file.

Monitoring or reporting · Unaddressed by formal action

Follow-up Or Routine LCR Tap M/RViolation 4004762 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start July 1, 2026 · first reported September 15, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030006	July 15, 2026	Informal	State Violation/Reminder Notice
4030007	July 15, 2026	Informal	State Public Notification requested

Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 4004761 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start February 4, 2024 · period end March 19, 2024 · first reported May 16, 2024 · EPA return-to-compliance field March 19, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
4030002 March 15, 2024 Informal State Violation/Reminder Notice
4030004 March 19, 2024 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030002	March 15, 2024	Informal	State Violation/Reminder Notice
4030004	March 19, 2024	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 4004739 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad 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
4029997	January 4, 2024	Informal	State Violation/Reminder Notice
4029998	January 4, 2024	Informal	State Public Notification requested
4030003	March 19, 2024	Informal	State Public Notification received
4030005	August 13, 2024	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 4004738 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported November 15, 2023 · EPA return-to-compliance field September 30, 2023

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4029990	June 28, 2023	Formal	State Administrative/Compliance Order without penalty issued
4029994	October 10, 2023	Informal	State Violation/Reminder Notice
4029995	October 10, 2023	Informal	State Public Notification requested
4029996	December 1, 2023	Informal	State Public Notification received
4030005	August 13, 2024	Resolving	State Compliance achieved

Other or unclassified · Resolved

Public Notification Violation for NPDWR ViolationViolation 4004736 · Public Notice · Public Notice Rule and Revised PN Rule

Noncompliance period start April 16, 2023 · period end June 6, 2023 · first reported August 15, 2023 · EPA return-to-compliance field June 6, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4029987	May 22, 2023	Informal	State Violation/Reminder Notice
4029988	June 6, 2023	Informal	State Public Notification received
4029989	June 6, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 4004737 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2023 · period end June 30, 2023 · first reported August 15, 2023 · EPA return-to-compliance field June 30, 2023

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4029990	June 28, 2023	Formal	State Administrative/Compliance Order without penalty issued
4029991	July 13, 2023	Informal	State Violation/Reminder Notice
4029992	July 13, 2023	Informal	State Public Notification requested
4029993	August 4, 2023	Informal	State Public Notification received
4030005	August 13, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004760 · Styrene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004759 · Ethylbenzene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004758 · Toluene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004757 · Benzene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004756 · CHLOROBENZENE · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004755 · Tetrachloroethylene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004754 · 1,1,2-Trichloroethane · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004753 · Trichloroethylene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004752 · 1,2-Dichloropropane · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004751 · Carbon tetrachloride · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004750 · 1,1,1-Trichloroethane · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004749 · 1,2-Dichloroethane · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004748 · trans-1,2-Dichloroethylene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004747 · 1,1-Dichloroethylene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004746 · Vinyl chloride · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004745 · p-Dichlorobenzene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004744 · o-Dichlorobenzene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004743 · DICHLOROMETHANE · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004742 · Xylenes, Total · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004741 · cis-1,2-Dichloroethylene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004740 · 1,2,4-Trichlorobenzene · Volatile Organic Chemicals

Noncompliance period start January 1, 2023 · period end November 16, 2023 · first reported February 14, 2024 · EPA return-to-compliance field November 16, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4030001	November 16, 2023	Resolving	State Compliance achieved
4029999	January 16, 2024	Informal	State Violation/Reminder Notice
4030000	January 16, 2024	Informal	State Public Notification requested

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 4004735 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2023 · period end March 31, 2023 · first reported May 15, 2023 · EPA return-to-compliance field March 31, 2023

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4029985	March 16, 2023	Informal	State Violation/Reminder Notice
4029986	March 16, 2023	Informal	State Public Notification requested
4029988	June 6, 2023	Informal	State Public Notification received
4029990	June 28, 2023	Formal	State Administrative/Compliance Order without penalty issued
4030005	August 13, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 4004734 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2022 · period end March 31, 2022 · first reported May 17, 2022 · EPA return-to-compliance field March 31, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4029982	May 4, 2022	Informal	State Violation/Reminder Notice
4029983	May 4, 2022	Informal	State Public Notification requested
4029984	August 1, 2022	Resolving	State Compliance achieved

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