WI2686101 · Wisconsin
DELAFIELD LAKES 402
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 · Waukesha 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 4 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 227.5 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring, RegularViolation 2300012 · Di(2-ethylhexyl) phthalate · Synthetic Organic ChemicalsNoncompliance period start April 1, 2023 · period end June 30, 2023 · first reported August 28, 2025 · EPA return-to-compliance field June 30, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300036 August 10, 2023 Resolving State Compliance achieved 2300038 September 26, 2023 Informal State Violation/Reminder Notice 2300039 September 26, 2023 Informal State Public Notification requested 2300042 September 26, 2023 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2300011 · Di(2-ethylhexyl) phthalate · Synthetic Organic ChemicalsNoncompliance period start January 1, 2023 · period end March 31, 2023 · first reported August 28, 2025 · EPA return-to-compliance field March 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300037 August 10, 2023 Resolving State Compliance achieved 2300040 September 26, 2023 Informal State Violation/Reminder Notice 2300041 September 26, 2023 Informal State Public Notification requested 2300043 September 26, 2023 Informal State Public Notification received Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 2100010 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start June 1, 2021 · period end September 22, 2022 · first reported December 2, 2021 · EPA return-to-compliance field September 22, 2022
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2200032 October 18, 2021 Informal State Violation/Reminder Notice 2200033 October 18, 2021 Informal State Public Notification requested 2200034 May 18, 2022 Informal State Public Notification received 2200035 September 22, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2100009 · Nitrate · Nitrate RuleNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 3, 2021 · EPA return-to-compliance field December 31, 2020
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2100027 February 26, 2021 Informal State Violation/Reminder Notice 2100028 February 26, 2021 Informal State Public Notification requested 2100030 March 22, 2021 Resolving State Compliance achieved 2100031 June 25, 2021 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