IA8018040 · Iowa

DIAGONAL WATER DEPARTMENT

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

Violation records shown: 11
EPA health-based flag: 0
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 9

Counties listed by EPA · Ringgold County, Iowa

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

Violations and what followed

Among 8 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

Monitoring and Reporting (DBP)Violation 99726 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start November 1, 2025 · period end November 30, 2025 · first reported June 17, 2026 · EPA return-to-compliance field November 30, 2025

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
80	January 21, 2026	Informal	State Public Notification requested
81	January 21, 2026	Informal	State Formal Notice of Violation issued
78	February 2, 2026	Informal	State Public Notification received
79	February 2, 2026	Informal	State Public Notification received
82	February 9, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 99626 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start November 1, 2025 · period end November 30, 2025 · first reported June 17, 2026 · EPA return-to-compliance field November 30, 2025

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
87	January 21, 2026	Informal	State Formal Notice of Violation issued
88	January 21, 2026	Informal	State Public Notification requested
86	February 2, 2026	Informal	State Public Notification received
89	February 2, 2026	Informal	State Public Notification received
90	February 9, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Unaddressed by formal action

Follow-up Or Routine LCR Tap M/RViolation 45526 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start June 1, 2025 · first reported June 17, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
83	December 18, 2025	Informal	State Formal Notice of Violation issued
84	December 18, 2025	Informal	State Public Notification requested
85	January 22, 2026	Informal	State Public Notification received

Other or unclassified · Unaddressed by formal action

Public Notification Violation for NPDWR ViolationViolation 221425 · Public Notice · Public Notice Rule and Revised PN Rule

Noncompliance period start March 21, 2025 · first reported September 19, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
75	June 25, 2025	Informal	State Intentional no-action
76	June 25, 2025	Informal	State Formal Notice of Violation issued
77	June 25, 2025	Informal	State Violation/Reminder Notice

Other or unclassified · Unaddressed by formal action

Public Notification Violation for NPDWR ViolationViolation 109125 · Public Notice · Public Notice Rule and Revised PN Rule

Noncompliance period start October 21, 2024 · first reported September 19, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
72	June 25, 2025	Informal	State Violation/Reminder Notice
73	June 25, 2025	Informal	State Formal Notice of Violation issued
74	June 25, 2025	Informal	State Intentional no-action

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 99025 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start October 1, 2024 · period end October 31, 2024 · first reported March 26, 2025 · EPA return-to-compliance field October 31, 2024

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
60	November 20, 2024	Informal	State Public Notification requested
61	November 20, 2024	Informal	State Formal Notice of Violation issued
68	November 20, 2024	Resolving	State Compliance achieved
69	December 19, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 145025 · Nitrite · Nitrate Rule

Noncompliance period start October 1, 2024 · period end December 31, 2024 · first reported March 26, 2025 · EPA return-to-compliance field December 31, 2024

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
71	January 8, 2025	Resolving	State Compliance achieved
66	February 20, 2025	Informal	State Public Notification requested
67	February 20, 2025	Informal	State Formal Notice of Violation issued
70	March 13, 2025	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 206824 · Nitrite · Nitrate Rule

Noncompliance period start April 1, 2024 · period end June 30, 2024 · first reported September 25, 2024 · EPA return-to-compliance field June 30, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
65	July 16, 2024	Resolving	State Compliance achieved
58	July 17, 2024	Informal	State Public Notification requested
59	July 17, 2024	Informal	State Formal Notice of Violation issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 126324 · Nitrite · Nitrate Rule

Noncompliance period start January 1, 2024 · period end March 31, 2024 · first reported March 26, 2025 · EPA return-to-compliance field March 31, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
64	July 16, 2024	Resolving	State Compliance achieved
62	December 17, 2024	Informal	State Public Notification requested
63	December 17, 2024	Informal	State Formal Notice of Violation issued

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 118823 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start April 1, 2023 · period end April 30, 2023 · first reported September 13, 2023 · EPA return-to-compliance field April 30, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
57	May 10, 2023	Resolving	State Compliance achieved
54	May 31, 2023	Informal	State Formal Notice of Violation issued
56	May 31, 2023	Informal	State Public Notification requested
55	June 5, 2023	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 193021 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start August 1, 2021 · period end August 31, 2021 · first reported March 3, 2022 · EPA return-to-compliance field August 31, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
51	September 10, 2021	Informal	State Formal Notice of Violation issued
53	September 13, 2021	Resolving	State Compliance achieved
49	January 18, 2022	Informal	State Public Notification requested
50	January 18, 2022	Informal	State Formal Notice of Violation issued
52	March 22, 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