NM3500324 · New Mexico

ROSA JOINT VENTURES WATER SYSTEM

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

Violation records shown: 34
EPA health-based flag: 13
Health-based records unresolved in this snapshot: 5
Monitoring and reporting records: 6

Counties listed by EPA · San Juan County, New Mexico

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

Violations and what followed

Among 25 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 112 days. The interval uses the reporting periods and dates on file.

EPA health-based flag · Unaddressed by formal action

Failure To Address DeficiencyViolation 51904 · Groundwater Rule · Ground Water Rule

Noncompliance period start December 24, 2025 · first reported March 31, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
192	February 9, 2026	Informal	State Violation/Reminder Notice
193	February 9, 2026	Informal	State Public Notification requested

EPA health-based flag · Unaddressed by formal action

Failure To Address DeficiencyViolation 51901 · Groundwater Rule · Ground Water Rule

Noncompliance period start December 24, 2025 · first reported March 31, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
192	February 9, 2026	Informal	State Violation/Reminder Notice
193	February 9, 2026	Informal	State Public Notification requested

EPA health-based flag · Unaddressed by formal action

Failure To Address DeficiencyViolation 51899 · Groundwater Rule · Ground Water Rule

Noncompliance period start December 24, 2025 · first reported March 31, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
192	February 9, 2026	Informal	State Violation/Reminder Notice
193	February 9, 2026	Informal	State Public Notification requested

EPA health-based flag · Unaddressed by formal action

Failure To Address DeficiencyViolation 51898 · Groundwater Rule · Ground Water Rule

Noncompliance period start December 24, 2025 · first reported March 31, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
192	February 9, 2026	Informal	State Violation/Reminder Notice
193	February 9, 2026	Informal	State Public Notification requested

EPA health-based flag · Unaddressed by formal action

Failure To Address DeficiencyViolation 51897 · Groundwater Rule · Ground Water Rule

Noncompliance period start December 24, 2025 · first reported March 31, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
192	February 9, 2026	Informal	State Violation/Reminder Notice
193	February 9, 2026	Informal	State Public Notification requested

EPA health-based flag · Resolved

Failure To Address DeficiencyViolation 51903 · Groundwater Rule · Ground Water Rule

Noncompliance period start December 24, 2025 · period end April 15, 2026 · first reported March 31, 2026 · EPA return-to-compliance field April 15, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
192	February 9, 2026	Informal	State Violation/Reminder Notice
193	February 9, 2026	Informal	State Public Notification requested
194	April 15, 2026	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Failure To Address DeficiencyViolation 51902 · Groundwater Rule · Ground Water Rule

Noncompliance period start December 24, 2025 · period end April 15, 2026 · first reported March 31, 2026 · EPA return-to-compliance field April 15, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
192	February 9, 2026	Informal	State Violation/Reminder Notice
193	February 9, 2026	Informal	State Public Notification requested
197	April 15, 2026	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Failure To Address DeficiencyViolation 51900 · Groundwater Rule · Ground Water Rule

Noncompliance period start December 24, 2025 · period end April 15, 2026 · first reported March 31, 2026 · EPA return-to-compliance field April 15, 2026

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
192	February 9, 2026	Informal	State Violation/Reminder Notice
193	February 9, 2026	Informal	State Public Notification requested
195	April 15, 2026	Resolving	State Compliance achieved
196	April 15, 2026	Resolving	State Compliance achieved

Other or unclassified · Unaddressed by formal action

Failure to Consult with StateViolation 51896 · Groundwater Rule · Ground Water Rule

Noncompliance period start September 28, 2025 · first reported March 31, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
190	February 9, 2026	Informal	State Violation/Reminder Notice
191	February 9, 2026	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 51892 · E. COLI · Ground Water Rule

Noncompliance period start August 17, 2023 · period end August 23, 2023 · first reported November 17, 2023 · EPA return-to-compliance field August 23, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
168	August 23, 2023	Informal	State Violation/Reminder Notice
169	August 23, 2023	Informal	State Public Notification requested
172	August 23, 2023	Resolving	State Compliance achieved
173	September 13, 2023	Informal	State Public Notification received

EPA health-based flag · Resolved

Failure To Address DeficiencyViolation 51891 · Groundwater Rule · Ground Water Rule

Noncompliance period start August 9, 2023 · period end September 16, 2023 · first reported November 17, 2023 · EPA return-to-compliance field September 16, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
166	August 23, 2023	Informal	State Violation/Reminder Notice
167	August 23, 2023	Informal	State Public Notification requested
174	September 16, 2023	Resolving	State Compliance achieved
175	September 18, 2023	Informal	State Public Notification received

EPA health-based flag · Resolved

Failure To Address DeficiencyViolation 51890 · Groundwater Rule · Ground Water Rule

Noncompliance period start August 9, 2023 · period end August 29, 2023 · first reported November 17, 2023 · EPA return-to-compliance field August 29, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
166	August 23, 2023	Informal	State Violation/Reminder Notice
167	August 23, 2023	Informal	State Public Notification requested
171	August 29, 2023	Resolving	State Compliance achieved
175	September 18, 2023	Informal	State Public Notification received

Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 51889 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start March 22, 2023 · period end June 12, 2023 · first reported August 22, 2023 · EPA return-to-compliance field June 12, 2023

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
164 June 12, 2023 Resolving State Compliance achieved
Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 51887 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start July 1, 2022 · period end October 12, 2022 · first reported November 14, 2022 · EPA return-to-compliance field October 12, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
158 October 12, 2022 Informal State Violation/Reminder Notice
159 October 12, 2022 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation without NPDWR ViolationViolation 51888 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start April 1, 2022 · period end June 30, 2022 · first reported February 13, 2023 · EPA return-to-compliance field June 30, 2022

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
160 June 30, 2022 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 51886 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start March 13, 2022 · period end August 31, 2022 · first reported November 14, 2022 · EPA return-to-compliance field August 31, 2022

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
157 August 31, 2022 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 51885 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 1, 2022 · period end May 17, 2023 · first reported November 14, 2022 · EPA return-to-compliance field May 17, 2023

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
161 May 17, 2023 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 51884 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start December 10, 2021 · period end January 30, 2025 · first reported November 14, 2022 · EPA return-to-compliance field January 30, 2025

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
189 January 30, 2025 Resolving State Compliance achieved
Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 51895 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start October 1, 2021 · period end October 9, 2024 · first reported March 31, 2025 · EPA return-to-compliance field October 9, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
188 October 9, 2024 Resolving State Compliance achieved
186 January 12, 2025 Informal State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
164	June 12, 2023	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
158	October 12, 2022	Informal	State Violation/Reminder Notice
159	October 12, 2022	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
160	June 30, 2022	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
157	August 31, 2022	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
161	May 17, 2023	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
189	January 30, 2025	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
188	October 9, 2024	Resolving	State Compliance achieved
186	January 12, 2025	Informal	State Violation/Reminder Notice

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 51883 · Selenium · Inorganic Chemicals

Noncompliance period start October 1, 2021 · period end December 31, 2021 · first reported May 19, 2022 · EPA return-to-compliance field December 31, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
151	April 1, 2022	Informal	State Violation/Reminder Notice
152	April 1, 2022	Informal	State Public Notification requested
153	May 1, 2022	Informal	State Public Notification received
176	March 29, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Follow-up Or Routine LCR Tap M/RViolation 51882 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start October 1, 2021 · period end August 28, 2023 · first reported May 19, 2022 · EPA return-to-compliance field August 28, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
149	March 21, 2022	Informal	State Violation/Reminder Notice
150	March 21, 2022	Informal	State Public Notification requested
163	May 26, 2023	Informal	State Public Notification received
177	August 28, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 51880 · E. COLI · Ground Water Rule

Noncompliance period start August 25, 2021 · period end May 27, 2022 · first reported September 27, 2021 · EPA return-to-compliance field May 27, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
147	August 27, 2021	Informal	State Violation/Reminder Notice
148	August 27, 2021	Informal	State Public Notification requested
178	May 27, 2022	Resolving	State Compliance achieved
156	June 30, 2022	Informal	State Public Notification received

Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 51879 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start July 1, 2021 · period end September 6, 2024 · first reported September 27, 2021 · EPA return-to-compliance field September 6, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
145 July 16, 2021 Informal State Violation/Reminder Notice
184 September 6, 2024 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
145	July 16, 2021	Informal	State Violation/Reminder Notice
184	September 6, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 51877 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start April 1, 2021 · period end April 30, 2021 · first reported September 8, 2021 · EPA return-to-compliance field April 30, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
138	May 18, 2021	Resolving	State Compliance achieved
136	June 11, 2021	Informal	State Violation/Reminder Notice
137	June 11, 2021	Informal	State Public Notification requested
142	June 27, 2021	Informal	State Public Notification received

Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 51875 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 9, 2021 · first reported March 25, 2021
No linked action row appears in the records shown.

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 51876 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start January 1, 2021 · period end January 31, 2021 · first reported March 25, 2021 · EPA return-to-compliance field January 31, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
135	February 22, 2021	Resolving	State Compliance achieved
133	March 12, 2021	Informal	State Violation/Reminder Notice
134	March 12, 2021	Informal	State Public Notification requested
154	June 30, 2022	Informal	State Public Notification received

EPA health-based flag · Resolved

Treatment Technique, Level 2 Assessment (RTCR)Violation 51871 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start December 22, 2020 · period end September 23, 2021 · first reported February 22, 2021 · EPA return-to-compliance field September 23, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
126	December 31, 2020	Informal	State Violation/Reminder Notice
127	December 31, 2020	Informal	State Public Notification requested
182	September 23, 2021	Resolving	State Compliance achieved
162	May 26, 2023	Informal	State Public Notification received

Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 51874 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start December 21, 2020 · period end December 21, 2020 · first reported March 25, 2021 · EPA return-to-compliance field December 21, 2020

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
132 December 21, 2020 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 51873 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start May 11, 2020 · period end April 12, 2020 · first reported March 25, 2021 · EPA return-to-compliance field April 12, 2020

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
131 April 12, 2020 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
132	December 21, 2020	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
131	April 12, 2020	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 51872 · Selenium · Inorganic Chemicals

Noncompliance period start April 1, 2020 · period end June 30, 2020 · first reported February 22, 2021 · EPA return-to-compliance field June 30, 2020

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
128	December 9, 2020	Informal	State Violation/Reminder Notice
129	December 9, 2020	Informal	State Public Notification requested
179	March 19, 2024	Resolving	State Compliance achieved

Other or unclassified · Resolved
Public Notification Violation without NPDWR ViolationViolation 51881 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start February 28, 2020 · period end July 22, 2024 · first reported February 23, 2022 · EPA return-to-compliance field July 22, 2024

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
183 July 22, 2024 Resolving State Compliance achieved
Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 51894 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start October 1, 2018 · period end June 10, 2019 · first reported March 31, 2025 · EPA return-to-compliance field June 10, 2019

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
187 June 10, 2019 Resolving State Compliance achieved
186 January 12, 2025 Informal State Violation/Reminder Notice
Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 51893 · Lead and Copper Rule · Lead and Copper Rule
Noncompliance period start October 1, 2014 · period end August 19, 2015 · first reported March 31, 2025 · EPA return-to-compliance field August 19, 2015

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
185 August 19, 2015 Resolving State Compliance achieved
Other or unclassified · Unaddressed by formal action
Consumer Confidence Report Complete Failure to ReportViolation 104 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start October 19, 1999 · first reported November 15, 2005
No linked action row appears in the records shown.

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
183	July 22, 2024	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
187	June 10, 2019	Resolving	State Compliance achieved
186	January 12, 2025	Informal	State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
185	August 19, 2015	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