WI1130242 · Wisconsin
MIDDLETON WATERWORKS
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 30
- EPA health-based flag
- 1
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 27
Counties listed by EPA · Dane County, Wisconsin
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 28 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 317 days. The interval uses the reporting periods and dates on file.
Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 2500067 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start October 17, 2024 · first reported December 17, 2025
No linked action row appears in the records shown.Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 2500066 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start October 17, 2024 · first reported August 28, 2025
No linked action row appears in the records shown.EPA health-based flag · Resolved
LSL InventoryViolation 2500065 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · period end May 29, 2025 · first reported August 28, 2025 · EPA return-to-compliance field May 29, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500025 May 29, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
LSL ReportingViolation 2500064 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · period end October 21, 2024 · first reported August 28, 2025 · EPA return-to-compliance field October 21, 2024
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500022 October 21, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400042 · BHC-GAMMA · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400041 · Endrin · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400040 · Methoxychlor · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400039 · Toxaphene · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400036 · Simazine · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400035 · Chlordane · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400032 · Pentachlorophenol · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400031 · HEXACHLOROBENZENE · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400030 · 2,4,5-TP · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400029 · 2,4-D · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400025 · Heptachlor epoxide · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400024 · Heptachlor · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400023 · LASSO · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400022 · Atrazine · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400021 · Aldicarb · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400020 · Carbofuran · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400018 · Aldicarb sulfone · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400017 · Aldicarb sulfoxide · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400016 · Hexachlorocyclopentadiene · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400015 · Dinoseb · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400014 · Picloram · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400013 · OXAMYL · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400012 · Glyphosate · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400011 · Endothall · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400010 · Diquat · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2400009 · Dalapon · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 14, 2023 · first reported August 28, 2025 · EPA return-to-compliance field November 14, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400013 November 14, 2023 Resolving State Compliance achieved 2400011 November 17, 2023 Informal State Violation/Reminder Notice 2400012 November 17, 2023 Informal State Public Notification requested 2400014 June 24, 2024 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