OH0904012 · Ohio
HAMILTON PUBLIC WATER SYSTEM
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 2
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 1
Counties listed by EPA · Butler County, Ohio
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Other or unclassified · Unaddressed by formal action
Consumer Confidence Report Inadequate ReportingViolation 8489043 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start December 30, 2025 · first reported February 25, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2091229 December 30, 2025 Informal State Violation/Reminder Notice 2091230 January 20, 2026 Informal State Violation/Reminder Notice Monitoring or reporting · Archived
Monitoring and Reporting (DBP)Violation 8489041 · Chlorite · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start April 1, 2025 · period end April 30, 2025 · first reported August 11, 2025 · EPA return-to-compliance field April 30, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2091225 May 20, 2025 Informal State Violation/Reminder Notice 2091226 May 20, 2025 Informal State Public Notification requested 2091231 June 26, 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