CO0235676 · Colorado

RIVERVIEW CG

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

Violation records shown: 16
EPA health-based flag: 3
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 12

Counties listed by EPA · Larimer 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 29 days. The interval uses the reporting periods and dates on file.

Monitoring or reporting · Archived

Monitoring, Turbidity (Enhanced SWTR)Violation 2011156 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start July 1, 2026 · period end July 31, 2026 · first reported September 15, 2026 · EPA return-to-compliance field July 31, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023352	July 10, 2026	Informal	State Violation/Reminder Notice
2023353	July 10, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, Turbidity (Enhanced SWTR)Violation 2011158 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start June 1, 2026 · period end June 30, 2026 · first reported September 15, 2026 · EPA return-to-compliance field June 30, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023356	July 10, 2026	Informal	State Violation/Reminder Notice
2023357	July 10, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring of Treatment (SWTR-Filter)Violation 2011155 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start June 1, 2025 · period end June 30, 2025 · first reported August 18, 2025 · EPA return-to-compliance field June 30, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023347	July 16, 2025	Informal	State Violation/Reminder Notice
2023348	July 16, 2025	Informal	State Public Notification requested
2023349	July 21, 2025	Informal	State Public Notification received

EPA health-based flag · Resolved

Treatment Technique (SWTR and GWR)Violation 2011153 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start February 1, 2023 · period end February 28, 2023 · first reported May 15, 2023 · EPA return-to-compliance field February 28, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023342	March 10, 2023	Informal	State Violation/Reminder Notice
2023343	March 10, 2023	Informal	State Public Notification requested
2023344	March 21, 2023	Informal	State Public Notification received
2023345	April 6, 2023	Resolving	State Compliance achieved

Other or unclassified · Resolved

Public Notification Violation without NPDWR ViolationViolation 2011154 · Public Notice · Public Notice Rule and Revised PN Rule

Noncompliance period start August 29, 2022 · period end May 15, 2025 · first reported May 15, 2025 · EPA return-to-compliance field May 15, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023346	May 9, 2025	Informal	State Violation/Reminder Notice
2023350	May 15, 2025	Informal	State Public Notification received
2023351	May 15, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Treatment Technique (SWTR and GWR)Violation 2011152 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start July 1, 2022 · period end July 31, 2022 · first reported August 15, 2022 · EPA return-to-compliance field July 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023337	August 4, 2022	Informal	State Violation/Reminder Notice
2023338	August 4, 2022	Informal	State Public Notification requested
2023339	August 23, 2022	Informal	State Public Notification received
2023340	September 10, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 2011151 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start June 1, 2022 · period end June 30, 2022 · first reported August 15, 2022 · EPA return-to-compliance field June 30, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023334	July 12, 2022	Informal	State Public Notification requested
2023335	July 12, 2022	Informal	State Violation/Reminder Notice
2023336	July 12, 2022	Informal	State Public Notification requested
2023340	September 10, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Turbidity (Enhanced SWTR)Violation 2011150 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start June 1, 2022 · period end June 30, 2022 · first reported August 15, 2022 · EPA return-to-compliance field June 30, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023329	July 12, 2022	Informal	State Violation/Reminder Notice
2023330	July 12, 2022	Informal	State Public Notification requested
2023340	September 10, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Turbidity (Enhanced SWTR)Violation 2011147 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start May 1, 2022 · period end May 10, 2022 · first reported May 17, 2022 · EPA return-to-compliance field May 10, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023317	May 10, 2022	Informal	State Violation/Reminder Notice
2023318	May 10, 2022	Informal	State Public Notification requested
2023326	May 10, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Turbidity (Enhanced SWTR)Violation 2011146 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start April 1, 2022 · period end April 30, 2022 · first reported May 17, 2022 · EPA return-to-compliance field April 30, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023315	April 28, 2022	Informal	State Violation/Reminder Notice
2023316	April 28, 2022	Informal	State Public Notification requested
2023327	May 10, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Turbidity (Enhanced SWTR)Violation 2011145 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start March 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
2023313	April 28, 2022	Informal	State Violation/Reminder Notice
2023314	April 28, 2022	Informal	State Public Notification requested
2023326	May 10, 2022	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Treatment Technique (SWTR and GWR)Violation 2011142 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start February 1, 2022 · period end February 8, 2022 · first reported May 17, 2022 · EPA return-to-compliance field February 8, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023308	February 8, 2022	Resolving	State Compliance achieved
2023305	March 15, 2022	Informal	State Violation/Reminder Notice
2023306	March 15, 2022	Informal	State Public Notification requested
2023307	March 31, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 2011141 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start June 1, 2021 · period end June 30, 2021 · first reported August 18, 2021 · EPA return-to-compliance field June 30, 2021

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023302	July 13, 2021	Informal	State Violation/Reminder Notice
2023303	July 13, 2021	Informal	State Public Notification requested
2023304	September 8, 2021	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Turbidity (Enhanced SWTR)Violation 2011140 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start June 1, 2021 · period end June 30, 2021 · first reported August 18, 2021 · EPA return-to-compliance field June 30, 2021

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023300	July 13, 2021	Informal	State Violation/Reminder Notice
2023301	July 13, 2021	Informal	State Public Notification requested
2023304	September 8, 2021	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Turbidity (Enhanced SWTR)Violation 2011139 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Noncompliance period start November 1, 2020 · period end November 30, 2020 · first reported February 16, 2021 · EPA return-to-compliance field November 30, 2020

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023297	December 14, 2020	Informal	State Violation/Reminder Notice
2023298	December 14, 2020	Informal	State Public Notification requested
2023299	January 10, 2021	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 2011138 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start November 1, 2020 · period end November 30, 2020 · first reported February 16, 2021 · EPA return-to-compliance field November 30, 2020

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2023295	December 14, 2020	Informal	State Violation/Reminder Notice
2023296	December 14, 2020	Informal	State Public Notification requested
2023299	January 10, 2021	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