MO5031481 · Missouri

OAK BROOK ESTATES

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

Violation records shown: 20
EPA health-based flag: 1
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 14

Counties listed by EPA · Taney County, Missouri

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

Violations and what followed

Among 15 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 147 days. The interval uses the reporting periods and dates on file.

Other or unclassified · Resolved

Consumer Confidence Report Inadequate ReportingViolation 135 · Consumer Confidence Rule · Consumer Confidence Rule

Noncompliance period start July 1, 2025 · period end November 25, 2025 · first reported December 31, 2025 · EPA return-to-compliance field November 25, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
285	November 25, 2025	Informal	State Formal Notice of Violation issued
286	November 25, 2025	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

LSL ReportingViolation 134 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule Revisions

Noncompliance period start October 17, 2024 · period end December 18, 2024 · first reported December 31, 2025 · EPA return-to-compliance field December 18, 2024

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
282	December 18, 2024	Resolving	State Compliance achieved
280	October 16, 2025	Informal	State Violation/Reminder Notice
281	October 16, 2025	Informal	State Public Notification requested
283	October 30, 2025	Informal	State Public Notification received

Other or unclassified · Resolved

Consumer Confidence Report Inadequate ReportingViolation 131 · Consumer Confidence Rule · Consumer Confidence Rule

Noncompliance period start July 1, 2024 · period end September 10, 2024 · first reported December 20, 2024 · EPA return-to-compliance field September 10, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
277	September 10, 2024	Resolving	State Compliance achieved
276	November 6, 2024	Informal	State Formal Notice of Violation issued

Other or unclassified · Resolved

Consumer Confidence Report Inadequate ReportingViolation 129 · Consumer Confidence Rule · Consumer Confidence Rule

Noncompliance period start July 1, 2023 · period end November 1, 2023 · first reported November 14, 2023 · EPA return-to-compliance field November 1, 2023

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
271	October 26, 2023	Informal	State Formal Notice of Violation issued
272	November 1, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 126 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start December 1, 2021 · period end December 31, 2021 · first reported March 28, 2022 · EPA return-to-compliance field December 31, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
262	October 27, 2021	Informal	State Other
258	January 11, 2022	Resolving	State Compliance achieved
253	January 19, 2022	Informal	State Public Notification received
256	January 27, 2022	Informal	State Violation/Reminder Notice
257	January 27, 2022	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 124 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start November 1, 2021 · period end November 30, 2021 · first reported March 28, 2022 · EPA return-to-compliance field November 30, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
262	October 27, 2021	Informal	State Other
248	December 29, 2021	Informal	State Violation/Reminder Notice
249	December 29, 2021	Informal	State Public Notification requested
258	January 11, 2022	Resolving	State Compliance achieved
253	January 19, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Failure Submit IDSE/Subpart V Plan RptViolation 122 · Stage 2 Disinfectants and Disinfection Byproducts Rule · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2021 · period end February 8, 2022 · first reported March 28, 2022 · EPA return-to-compliance field February 8, 2022

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
262	October 27, 2021	Informal	State Other
244	November 23, 2021	Informal	State Violation/Reminder Notice
245	November 23, 2021	Informal	State Public Notification requested
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed
253	January 19, 2022	Informal	State Public Notification received
260	February 8, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Follow-up Or Routine LCR Tap M/RViolation 119 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start October 1, 2021 · period end July 28, 2022 · first reported March 28, 2022 · EPA return-to-compliance field July 28, 2022

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
262	October 27, 2021	Informal	State Other
242	November 16, 2021	Informal	State Violation/Reminder Notice
243	November 16, 2021	Informal	State Public Notification requested
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed
253	January 19, 2022	Informal	State Public Notification received
266	July 28, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Archived

Monitoring, Routine (RTCR)Violation 117 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start September 1, 2021 · period end September 30, 2021 · first reported March 28, 2022 · EPA return-to-compliance field September 30, 2021

7 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
239	October 14, 2021	Resolving	State Compliance achieved
262	October 27, 2021	Informal	State Other
237	November 3, 2021	Informal	State Violation/Reminder Notice
238	November 3, 2021	Informal	State Public Notification requested
250	November 17, 2021	Informal	State Violation/Reminder Notice
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed
253	January 19, 2022	Informal	State Public Notification received

Other or unclassified · Unaddressed by formal action

Public Notification Violation for NPDWR ViolationViolation 116 · Public Notice · Public Notice Rule and Revised PN Rule

Noncompliance period start August 10, 2021 · first reported March 28, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
236	October 21, 2021	Resolving	State Compliance achieved
262	October 27, 2021	Informal	State Other
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed

Monitoring or reporting · Unaddressed by formal action

Monitoring, Source Water (GWR)Violation 115 · E. COLI · Ground Water Rule

Noncompliance period start August 1, 2021 · first reported March 28, 2022

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
229	August 31, 2021	Informal	State Violation/Reminder Notice
230	August 31, 2021	Informal	State Public Notification requested
234	August 31, 2021	Resolving	State Compliance achieved
262	October 27, 2021	Informal	State Other
235	November 1, 2021	Informal	State Public Notification received
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed

Other or unclassified · Resolved

Consumer Confidence Report Complete Failure to ReportViolation 123 · Consumer Confidence Rule · Consumer Confidence Rule

Noncompliance period start July 1, 2021 · period end January 14, 2022 · first reported March 28, 2022 · EPA return-to-compliance field January 14, 2022

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
262	October 27, 2021	Informal	State Other
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed
251	January 14, 2022	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Treatment Technique No Certif. OperatorViolation 112 · Stage 1 Disinfectants and Disinfection Byproducts Rule · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start June 30, 2021 · period end January 3, 2022 · first reported March 28, 2022 · EPA return-to-compliance field January 3, 2022

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
222	June 30, 2021	Informal	State Formal Notice of Violation issued
224	June 30, 2021	Informal	State Public Notification requested
262	October 27, 2021	Informal	State Other
235	November 1, 2021	Informal	State Public Notification received
259	January 3, 2022	Resolving	State Compliance achieved
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed

Monitoring or reporting · Archived

Monitoring, Routine (RTCR)Violation 113 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start May 1, 2021 · period end May 31, 2021 · first reported March 28, 2022 · EPA return-to-compliance field May 31, 2021

7 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
227	June 14, 2021	Resolving	State Compliance achieved
225	July 6, 2021	Informal	State Violation/Reminder Notice
226	July 6, 2021	Informal	State Public Notification requested
262	October 27, 2021	Informal	State Other
235	November 1, 2021	Informal	State Public Notification received
250	November 17, 2021	Informal	State Violation/Reminder Notice
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed

Monitoring or reporting · Archived

Monitoring, Routine (RTCR)Violation 111 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start April 1, 2021 · period end April 30, 2021 · first reported March 28, 2022 · EPA return-to-compliance field April 30, 2021

7 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
219	May 28, 2021	Informal	State Violation/Reminder Notice
220	May 28, 2021	Informal	State Public Notification requested
227	June 14, 2021	Resolving	State Compliance achieved
262	October 27, 2021	Informal	State Other
235	November 1, 2021	Informal	State Public Notification received
250	November 17, 2021	Informal	State Violation/Reminder Notice
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed

Monitoring or reporting · Resolved

Monitoring, RegularViolation 125 · Nitrate-Nitrite · Nitrate Rule

Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 28, 2022 · EPA return-to-compliance field December 31, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
262	October 27, 2021	Informal	State Other
254	January 21, 2022	Informal	State Violation/Reminder Notice
255	January 21, 2022	Informal	State Public Notification requested
261	May 13, 2022	Informal	State Public Notification received
263	June 7, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 121 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 28, 2022 · EPA return-to-compliance field December 31, 2021

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
262	October 27, 2021	Informal	State Other
246	November 23, 2021	Informal	State Violation/Reminder Notice
247	November 23, 2021	Informal	State Public Notification requested
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed
253	January 19, 2022	Informal	State Public Notification received
265	July 13, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 120 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported March 28, 2022 · EPA return-to-compliance field December 31, 2021

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
262	October 27, 2021	Informal	State Other
246	November 23, 2021	Informal	State Violation/Reminder Notice
247	November 23, 2021	Informal	State Public Notification requested
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed
253	January 19, 2022	Informal	State Public Notification received
265	July 13, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 110 · E. COLI · Ground Water Rule

Noncompliance period start August 1, 2019 · period end September 20, 2019 · first reported March 28, 2022 · EPA return-to-compliance field September 20, 2019

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
215	August 29, 2019	Informal	State Violation/Reminder Notice
216	August 29, 2019	Informal	State Public Notification requested
218	September 3, 2019	Informal	State Public Notification received
217	September 20, 2019	Resolving	State Compliance achieved
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 109 · E. COLI · Ground Water Rule

Noncompliance period start February 1, 2019 · period end August 23, 2019 · first reported March 28, 2022 · EPA return-to-compliance field August 23, 2019

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
210	February 28, 2019	Informal	State Violation/Reminder Notice
211	February 28, 2019	Informal	State Public Notification requested
212	March 12, 2019	Informal	State Public Notification received
214	August 23, 2019	Resolving	State Compliance achieved
252	January 13, 2022	Informal	State Bilateral Compliance Agreement signed

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