IL1970250 · Illinois

CREST HILL

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

Violation records shown: 35
EPA health-based flag: 1
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 29

Counties listed by EPA · Will 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 14 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 91 days. The interval uses the reporting periods and dates on file.

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 7177272 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2025 · period end October 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field October 31, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763964	November 24, 2025	Resolving	State Compliance achieved
7763920	December 16, 2025	Informal	State Violation/Reminder Notice
7763921	December 16, 2025	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 7177271 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start October 1, 2025 · period end October 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field October 31, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763964	November 24, 2025	Resolving	State Compliance achieved
7763918	December 16, 2025	Informal	State Violation/Reminder Notice
7763919	December 16, 2025	Informal	State Public Notification requested

Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 7177270 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start July 12, 2025 · first reported November 21, 2025

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
7763917 August 26, 2025 Informal State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763917	August 26, 2025	Informal	State Violation/Reminder Notice

Monitoring or reporting · Resolved

Notification, Known or Potential LSLViolation 7177268 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule Revisions

Noncompliance period start July 2, 2025 · period end November 13, 2025 · first reported November 21, 2025 · EPA return-to-compliance field November 13, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763914	July 3, 2025	Informal	State Violation/Reminder Notice
7763915	July 3, 2025	Informal	State Public Notification requested
7763967	November 13, 2025	Resolving	State Compliance achieved

Other or unclassified · Unaddressed by formal action
Consumer Confidence Report Inadequate ReportingViolation 7177269 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start July 1, 2025 · first reported November 21, 2025

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
7763916 August 22, 2025 Informal State Violation/Reminder Notice
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 7177264 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start February 23, 2025 · period end March 25, 2025 · first reported May 14, 2025 · EPA return-to-compliance field March 25, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
7763910 March 19, 2025 Informal State Violation/Reminder Notice
7763912 March 25, 2025 Resolving State Compliance achieved
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 7177259 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start July 13, 2024 · period end May 1, 2024 · first reported November 21, 2024 · EPA return-to-compliance field May 1, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
7763903 May 1, 2024 Resolving State Compliance achieved
7763902 August 22, 2024 Informal State Violation/Reminder Notice
Other or unclassified · Unaddressed by formal action
Consumer Confidence Report Inadequate ReportingViolation 7177265 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start July 1, 2024 · first reported May 14, 2025

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
7763911 March 27, 2025 Informal State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763916	August 22, 2025	Informal	State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763910	March 19, 2025	Informal	State Violation/Reminder Notice
7763912	March 25, 2025	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763903	May 1, 2024	Resolving	State Compliance achieved
7763902	August 22, 2024	Informal	State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763911	March 27, 2025	Informal	State Violation/Reminder Notice

Monitoring or reporting · Resolved

Follow-up Or Routine LCR Tap M/RViolation 7177258 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start July 1, 2024 · period end December 30, 2024 · first reported November 21, 2024 · EPA return-to-compliance field December 30, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763899	July 11, 2024	Informal	State Violation/Reminder Notice
7763900	July 11, 2024	Informal	State Public Notification requested
7763908	December 30, 2024	Resolving	State Compliance achieved

EPA health-based flag · Resolved

OCCT/SOWT Study/RecommendationViolation 7177263 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start January 2, 2024 · period end February 14, 2025 · first reported February 27, 2025 · EPA return-to-compliance field February 14, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763906	January 23, 2025	Informal	State Violation/Reminder Notice
7763907	January 23, 2025	Informal	State Public Notification requested
7763909	February 14, 2025	Resolving	State Compliance achieved
7763913	March 27, 2025	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 7177256 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported November 28, 2023 · EPA return-to-compliance field September 30, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763889	October 11, 2023	Informal	State Violation/Reminder Notice
7763890	October 11, 2023	Informal	State Public Notification requested
7763893	November 8, 2023	Resolving	State Compliance achieved
7763905	October 11, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 7177255 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported November 28, 2023 · EPA return-to-compliance field September 30, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763889	October 11, 2023	Informal	State Violation/Reminder Notice
7763890	October 11, 2023	Informal	State Public Notification requested
7763893	November 8, 2023	Resolving	State Compliance achieved
7763905	October 11, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Follow-up Or Routine LCR Tap M/RViolation 7177254 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start July 1, 2023 · period end March 11, 2024 · first reported November 28, 2023 · EPA return-to-compliance field March 11, 2024

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763886	July 13, 2023	Informal	State Violation/Reminder Notice
7763887	July 13, 2023	Informal	State Public Notification requested
7763894	March 11, 2024	Resolving	State Compliance achieved
7763904	October 8, 2024	Informal	State Public Notification received

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177294 · Carbofuran · Synthetic Organic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763962	January 16, 2026	Informal	State Violation/Reminder Notice
7763963	January 16, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177293 · Diquat · Synthetic Organic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763960	January 16, 2026	Informal	State Violation/Reminder Notice
7763961	January 16, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177292 · Diquat · Synthetic Organic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763958	January 16, 2026	Informal	State Violation/Reminder Notice
7763959	January 16, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177291 · OXAMYL · Synthetic Organic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763956	January 16, 2026	Informal	State Violation/Reminder Notice
7763957	January 16, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177289 · Chromium · Inorganic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763954	January 13, 2026	Informal	State Violation/Reminder Notice
7763955	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177287 · Nickel · Inorganic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763950	January 13, 2026	Informal	State Violation/Reminder Notice
7763951	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177286 · Fluoride · Inorganic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763948	January 13, 2026	Informal	State Violation/Reminder Notice
7763949	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177284 · Barium · Inorganic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763944	January 13, 2026	Informal	State Violation/Reminder Notice
7763945	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177283 · CYANIDE · Inorganic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763942	January 13, 2026	Informal	State Violation/Reminder Notice
7763943	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177282 · Beryllium, Total · Inorganic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763940	January 13, 2026	Informal	State Violation/Reminder Notice
7763941	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177280 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763936	January 13, 2026	Informal	State Violation/Reminder Notice
7763937	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177279 · Cadmium · Inorganic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763934	January 13, 2026	Informal	State Violation/Reminder Notice
7763935	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177277 · Thallium, Total · Inorganic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763930	January 13, 2026	Informal	State Violation/Reminder Notice
7763931	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177275 · Selenium · Inorganic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763926	January 13, 2026	Informal	State Violation/Reminder Notice
7763927	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177274 · Antimony, Total · Inorganic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763924	January 13, 2026	Informal	State Violation/Reminder Notice
7763925	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177273 · Mercury · Inorganic Chemicals

Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported February 26, 2026 · EPA return-to-compliance field December 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763922	January 13, 2026	Informal	State Violation/Reminder Notice
7763923	January 13, 2026	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 7177249 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2021 · period end December 9, 2021 · first reported February 9, 2022 · EPA return-to-compliance field December 9, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763869	November 19, 2021	Informal	State Violation/Reminder Notice
7763870	November 19, 2021	Informal	State Public Notification requested
7763873	December 9, 2021	Resolving	State Compliance achieved
7763881	May 27, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 7177248 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start October 1, 2021 · period end October 31, 2021 · first reported February 9, 2022 · EPA return-to-compliance field October 31, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763867	November 19, 2021	Informal	State Violation/Reminder Notice
7763868	November 19, 2021	Informal	State Public Notification requested
7763873	December 9, 2021	Resolving	State Compliance achieved
7763879	May 27, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 7177246 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start September 1, 2021 · period end September 30, 2021 · first reported December 1, 2021 · EPA return-to-compliance field September 30, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763863	October 19, 2021	Informal	State Violation/Reminder Notice
7763864	October 19, 2021	Informal	State Public Notification requested
7763873	December 9, 2021	Resolving	State Compliance achieved
7763878	May 27, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 7177247 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start July 1, 2021 · period end September 30, 2021 · first reported December 1, 2021 · EPA return-to-compliance field September 30, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763865	October 19, 2021	Informal	State Violation/Reminder Notice
7763866	October 19, 2021	Informal	State Public Notification requested
7763873	December 9, 2021	Resolving	State Compliance achieved
7763880	May 27, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 7177253 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported February 28, 2023 · EPA return-to-compliance field December 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763884	February 10, 2023	Informal	State Violation/Reminder Notice
7763885	February 10, 2023	Informal	State Public Notification requested
7763892	July 6, 2023	Informal	State Public Notification received
7763888	July 21, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Archived

Monitoring, RegularViolation 7177252 · CYANIDE · Inorganic Chemicals

Noncompliance period start January 1, 2020 · period end December 31, 2022 · first reported February 28, 2023 · EPA return-to-compliance field December 31, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
7763882	February 7, 2023	Informal	State Violation/Reminder Notice
7763883	February 7, 2023	Informal	State Public Notification requested
7763891	July 6, 2023	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