IA5868085 · Iowa

OAKVILLE WATER SUPPLY

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

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

Counties listed by EPA · Louisa 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 1 resolved record with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 365 days. The interval uses the reporting periods and dates on file.

Monitoring or reporting · Archived

Monitoring and Reporting (DBP)Violation 13726 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start August 1, 2025 · period end August 31, 2025 · first reported December 19, 2025 · EPA return-to-compliance field August 31, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
743622	October 22, 2025	Informal	State Public Notification requested
743623	October 22, 2025	Informal	State Formal Notice of Violation issued
743628	May 11, 2026	Informal	State Public Notification received

Monitoring or reporting · Archived

Monitoring and Reporting (DBP)Violation 13626 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start August 1, 2025 · period end August 31, 2025 · first reported December 19, 2025 · EPA return-to-compliance field August 31, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
743624	October 22, 2025	Informal	State Public Notification requested
743625	October 22, 2025	Informal	State Formal Notice of Violation issued
743629	May 11, 2026	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 205324 · Nitrate · Nitrate Rule

Noncompliance period start July 1, 2023 · period end June 30, 2024 · first reported September 25, 2024 · EPA return-to-compliance field June 30, 2024

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
743618	July 17, 2024	Informal	State Formal Notice of Violation issued
743619	July 17, 2024	Informal	State Public Notification requested
743621	July 30, 2024	Resolving	State Compliance achieved
743620	August 14, 2024	Informal	State Public Notification received

Monitoring or reporting · Archived

Monitoring, RegularViolation 127126 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2017 · period end December 31, 2025 · first reported March 17, 2026 · EPA return-to-compliance field December 31, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
743626	March 5, 2026	Informal	State Public Notification requested
743627	March 5, 2026	Informal	State Formal Notice of Violation issued
743630	May 11, 2026	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