IL0975040 · Illinois

AQUA ILLINOIS-HAWTHORN WOODS

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

Violation records shown: 17
EPA health-based flag: 1
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 15

Counties listed by EPA · Lake County, Illinois

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

Violations and what followed

Among 17 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 89 days. The interval uses the reporting periods and dates on file.

Monitoring or reporting · Resolved

Monitoring, RegularViolation 30 · Methoxychlor · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
32	April 13, 2026	Informal	State Violation/Reminder Notice
33	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 29 · Heptachlor epoxide · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
32	April 13, 2026	Informal	State Violation/Reminder Notice
33	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 28 · Hexachlorocyclopentadiene · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
32	April 13, 2026	Informal	State Violation/Reminder Notice
33	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 27 · Heptachlor · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
32	April 13, 2026	Informal	State Violation/Reminder Notice
33	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 26 · Endrin · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
32	April 13, 2026	Informal	State Violation/Reminder Notice
33	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 23 · Di(2-ethylhexyl) adipate · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
32	April 13, 2026	Informal	State Violation/Reminder Notice
33	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 22 · BHC-GAMMA · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
32	April 13, 2026	Informal	State Violation/Reminder Notice
33	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 21 · Di(2-ethylhexyl) phthalate · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
32	April 13, 2026	Informal	State Violation/Reminder Notice
33	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 20 · HEXACHLOROBENZENE · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
32	April 13, 2026	Informal	State Violation/Reminder Notice
33	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 19 · LASSO · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
32	April 13, 2026	Informal	State Violation/Reminder Notice
33	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 17 · Simazine · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
32	April 13, 2026	Informal	State Violation/Reminder Notice
33	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 16 · Atrazine · Synthetic Organic Chemicals

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
30	April 13, 2026	Informal	State Violation/Reminder Notice
31	April 13, 2026	Informal	State Public Notification requested
36	June 29, 2026	Resolving	State Compliance achieved

Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 13 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start June 14, 2025 · period end August 20, 2025 · first reported August 18, 2025 · EPA return-to-compliance field August 20, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
26 July 21, 2025 Informal State Violation/Reminder Notice
27 August 20, 2025 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
26	July 21, 2025	Informal	State Violation/Reminder Notice
27	August 20, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 12 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2025 · period end June 30, 2025 · first reported August 18, 2025 · EPA return-to-compliance field June 30, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
23	May 14, 2025	Informal	State Violation/Reminder Notice
24	May 14, 2025	Informal	State Public Notification requested
28	August 22, 2025	Informal	State Public Notification received
29	August 29, 2025	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 11 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start October 1, 2024 · period end December 31, 2024 · first reported February 27, 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
20	January 13, 2025	Informal	State Violation/Reminder Notice
21	January 13, 2025	Informal	State Public Notification requested
22	February 5, 2025	Resolving	State Compliance achieved
25	May 19, 2025	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2023 · period end June 30, 2023 · first reported August 29, 2023 · 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
16	July 17, 2023	Informal	State Violation/Reminder Notice
17	July 17, 2023	Informal	State Public Notification requested
18	July 26, 2023	Resolving	State Compliance achieved
19	May 17, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved
Monitoring, RegularViolation 7 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule
Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported February 9, 2022 · EPA return-to-compliance field December 31, 2021

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
11 January 19, 2022 Informal State Violation/Reminder Notice
15 January 25, 2022 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
11	January 19, 2022	Informal	State Violation/Reminder Notice
15	January 25, 2022	Resolving	State Compliance achieved

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