OK1021691 · Oklahoma

GRAND LAKE PWA

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

Violation records shown: 16
EPA health-based flag: 5
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 10

Counties listed by EPA · Delaware County, Oklahoma

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

Violations and what followed

Among 11 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 90 days. The interval uses the reporting periods and dates on file.

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 259582 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported August 11, 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
9006839	May 13, 2026	Formal	State Administrative/Compliance Order without penalty issued
9006840	May 13, 2026	Informal	State Public Notification requested
9006841	June 24, 2026	Informal	State Public Notification received

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 259581 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start October 1, 2025 · period end December 31, 2025 · first reported August 11, 2026 · EPA return-to-compliance field December 31, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006839	May 13, 2026	Formal	State Administrative/Compliance Order without penalty issued
9006840	May 13, 2026	Informal	State Public Notification requested
9006841	June 24, 2026	Informal	State Public Notification received

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 259580 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start July 1, 2025 · period end September 30, 2025 · first reported February 18, 2026 · EPA return-to-compliance field September 30, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006837	November 18, 2025	Informal	State Public Notification requested
9006838	November 18, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Follow-up Or Routine LCR Tap M/RViolation 259578 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start October 1, 2024 · period end July 11, 2025 · first reported February 25, 2025 · EPA return-to-compliance field July 11, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006832	November 22, 2024	Informal	State Violation/Reminder Notice
9006833	November 22, 2024	Informal	State Public Notification requested
9006836	June 30, 2025	Informal	State Public Notification received
9006834	July 11, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 259577 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2024 · period end March 31, 2024 · first reported September 30, 2024 · EPA return-to-compliance field March 31, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006829	June 19, 2024	Informal	State Public Notification requested
9006830	June 19, 2024	Formal	State Administrative/Compliance Order without penalty issued
9006835	July 30, 2025	Resolving	State Compliance achieved

Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 259576 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start October 2, 2023 · period end July 11, 2023 · first reported February 14, 2024 · EPA return-to-compliance field July 11, 2023

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
9006826 July 11, 2023 Resolving State Compliance achieved
9006825 January 18, 2024 Informal State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006826	July 11, 2023	Resolving	State Compliance achieved
9006825	January 18, 2024	Informal	State Violation/Reminder Notice

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 259575 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start October 1, 2023 · period end December 31, 2023 · first reported February 14, 2024 · EPA return-to-compliance field December 31, 2023

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006823	January 4, 2024	Formal	State Administrative/Compliance Order without penalty issued
9006824	January 4, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 259570 · Gross Beta Particle Activity · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2022 · period end June 30, 2022 · first reported September 26, 2022 · EPA return-to-compliance field June 30, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006818	August 30, 2022	Informal	State Violation/Reminder Notice
9006819	August 30, 2022	Informal	State Public Notification requested
9006820	September 14, 2022	Resolving	State Compliance achieved
9006827	April 30, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 259569 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2022 · period end June 30, 2022 · first reported September 26, 2022 · EPA return-to-compliance field June 30, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006818	August 30, 2022	Informal	State Violation/Reminder Notice
9006819	August 30, 2022	Informal	State Public Notification requested
9006820	September 14, 2022	Resolving	State Compliance achieved
9006827	April 30, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 259568 · Combined Uranium · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2022 · period end June 30, 2022 · first reported September 26, 2022 · EPA return-to-compliance field June 30, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006818	August 30, 2022	Informal	State Violation/Reminder Notice
9006819	August 30, 2022	Informal	State Public Notification requested
9006820	September 14, 2022	Resolving	State Compliance achieved
9006827	April 30, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 259567 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2022 · period end June 30, 2022 · first reported September 26, 2022 · EPA return-to-compliance field June 30, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006818	August 30, 2022	Informal	State Violation/Reminder Notice
9006819	August 30, 2022	Informal	State Public Notification requested
9006820	September 14, 2022	Resolving	State Compliance achieved
9006827	April 30, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 259566 · Gross Beta Particle Activity · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2022 · period end March 31, 2022 · first reported September 26, 2022 · EPA return-to-compliance field March 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006816	May 25, 2022	Informal	State Violation/Reminder Notice
9006817	May 25, 2022	Informal	State Public Notification requested
9006820	September 14, 2022	Resolving	State Compliance achieved
9006828	April 30, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 259565 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2022 · period end March 31, 2022 · first reported September 26, 2022 · EPA return-to-compliance field March 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006816	May 25, 2022	Informal	State Violation/Reminder Notice
9006817	May 25, 2022	Informal	State Public Notification requested
9006820	September 14, 2022	Resolving	State Compliance achieved
9006828	April 30, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 259564 · Combined Uranium · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2022 · period end March 31, 2022 · first reported September 26, 2022 · EPA return-to-compliance field March 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006816	May 25, 2022	Informal	State Violation/Reminder Notice
9006817	May 25, 2022	Informal	State Public Notification requested
9006820	September 14, 2022	Resolving	State Compliance achieved
9006828	April 30, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 259563 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2022 · period end March 31, 2022 · first reported September 26, 2022 · EPA return-to-compliance field March 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006816	May 25, 2022	Informal	State Violation/Reminder Notice
9006817	May 25, 2022	Informal	State Public Notification requested
9006820	September 14, 2022	Resolving	State Compliance achieved
9006828	April 30, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 259559 · E. COLI · Ground Water Rule

Noncompliance period start October 20, 2020 · period end December 8, 2022 · first reported March 1, 2021 · EPA return-to-compliance field December 8, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9006813	January 15, 2021	Informal	State Violation/Reminder Notice
9006814	January 15, 2021	Informal	State Public Notification requested
9006815	January 15, 2022	Informal	State Public Notification received
9006821	December 8, 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