CO0107487 · Colorado

LOUISVILLE CITY OF

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

Violation records shown: 3
EPA health-based flag: 2
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 1

Counties listed by EPA · Boulder 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 3 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 652 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule Revisions

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

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
404	October 17, 2024	Resolving	State Compliance achieved
402	November 7, 2024	Informal	State Violation/Reminder Notice
403	November 7, 2024	Informal	State Public Notification requested

EPA health-based flag · Resolved

Treatment Technique (SWTR and GWR)Violation 636 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start December 1, 2021 · period end December 31, 2021 · first reported February 23, 2022 · EPA return-to-compliance field December 31, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
388	December 30, 2021	Informal	State Boil Water Order
383	January 18, 2022	Informal	State Violation/Reminder Notice
384	January 18, 2022	Informal	State Public Notification requested
385	February 7, 2022	Resolving	State Compliance achieved
387	February 17, 2022	Informal	State Public Notification received

EPA health-based flag · Resolved

Single Turbidity Exceed (Enhanced SWTR)Violation 635 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start December 1, 2021 · period end December 31, 2021 · first reported February 23, 2022 · EPA return-to-compliance field December 31, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
388	December 30, 2021	Informal	State Boil Water Order
381	January 18, 2022	Informal	State Violation/Reminder Notice
382	January 18, 2022	Informal	State Public Notification requested
385	February 7, 2022	Resolving	State Compliance achieved
386	February 17, 2022	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