OK2000812 · Oklahoma

HYDRO PWA

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

Violation records shown: 31
EPA health-based flag: 1
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 29

Counties listed by EPA · Caddo 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 25 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 · Archived

Monitoring, Routine (RTCR)Violation 144993 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start April 1, 2026 · period end April 30, 2026 · first reported August 11, 2026 · EPA return-to-compliance field April 30, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189963	June 15, 2026	Informal	State Violation/Reminder Notice
9189964	June 15, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring and Reporting (DBP)Violation 144992 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2026 · period end April 30, 2026 · first reported August 11, 2026 · EPA return-to-compliance field April 30, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189961	June 15, 2026	Informal	State Violation/Reminder Notice
9189962	June 15, 2026	Informal	State Public Notification requested

Monitoring or reporting · Unaddressed by formal action

Monitoring, Source Water (GWR)Violation 144991 · E. COLI · Ground Water Rule

Noncompliance period start March 19, 2026 · first reported August 11, 2026

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189948	May 18, 2026	Informal	State Violation/Reminder Notice
9189949	May 18, 2026	Informal	State Public Notification requested
9189950	May 18, 2026	Informal	State Violation/Reminder Notice
9189951	May 18, 2026	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring and Reporting (DBP)Violation 144990 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

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

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189948	May 18, 2026	Informal	State Violation/Reminder Notice
9189949	May 18, 2026	Informal	State Public Notification requested

Monitoring or reporting · Unaddressed by formal action

Monitoring, Source Water (GWR)Violation 144989 · E. COLI · Ground Water Rule

Noncompliance period start September 19, 2025 · first reported February 18, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189943	November 21, 2025	Informal	State Violation/Reminder Notice
9189944	November 21, 2025	Informal	State Public Notification requested
9189960	May 29, 2026	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 144988 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

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

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189943	November 21, 2025	Informal	State Violation/Reminder Notice
9189944	November 21, 2025	Informal	State Public Notification requested
9189945	November 24, 2025	Resolving	State Compliance achieved
9189960	May 29, 2026	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 144987 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start August 1, 2025 · period end August 31, 2025 · first reported November 14, 2025 · EPA return-to-compliance field August 31, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189940	October 15, 2025	Informal	State Violation/Reminder Notice
9189941	October 15, 2025	Informal	State Public Notification requested
9189942	October 28, 2025	Resolving	State Compliance achieved
9189959	May 29, 2026	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 144984 · E. COLI · Ground Water Rule

Noncompliance period start December 20, 2024 · period end October 8, 2025 · first reported May 15, 2025 · EPA return-to-compliance field October 8, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189931	March 6, 2025	Informal	State Violation/Reminder Notice
9189932	March 6, 2025	Informal	State Public Notification requested
9189939	October 8, 2025	Resolving	State Compliance achieved
9189958	May 29, 2026	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 144983 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start December 1, 2024 · period end December 31, 2024 · first reported May 15, 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
9189931	March 6, 2025	Informal	State Violation/Reminder Notice
9189932	March 6, 2025	Informal	State Public Notification requested
9189933	March 26, 2025	Resolving	State Compliance achieved
9189958	May 29, 2026	Informal	State Public Notification received

Monitoring or reporting · Resolved

LSL ReportingViolation 144986 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule Revisions

Noncompliance period start October 17, 2024 · period end April 15, 2026 · first reported August 13, 2025 · EPA return-to-compliance field April 15, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189935	July 11, 2025	Informal	State Violation/Reminder Notice
9999900000000000001	March 10, 2026	Formal	Federal Final Administrative Order issued
9189947	April 15, 2026	Resolving	State Compliance achieved

EPA health-based flag · Resolved

LSL InventoryViolation 144985 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule Revisions

Noncompliance period start October 17, 2024 · period end April 15, 2026 · first reported August 13, 2025 · EPA return-to-compliance field April 15, 2026

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189934	July 11, 2025	Informal	State Violation/Reminder Notice
9189968	July 11, 2025	Informal	State Public Notification requested
9999900000000000001	March 10, 2026	Formal	Federal Final Administrative Order issued
9189946	April 15, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 144982 · E. COLI · Ground Water Rule

Noncompliance period start September 21, 2024 · period end October 8, 2025 · first reported December 30, 2024 · EPA return-to-compliance field October 8, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189929	November 22, 2024	Informal	State Violation/Reminder Notice
9189930	November 22, 2024	Informal	State Public Notification requested
9189938	October 8, 2025	Resolving	State Compliance achieved
9189957	May 29, 2026	Informal	State Public Notification received

Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 144979 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start July 1, 2024 · period end July 2, 2024 · first reported December 30, 2024 · EPA return-to-compliance field July 2, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
9189922 July 2, 2024 Resolving State Compliance achieved
9189921 July 12, 2024 Informal State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189922	July 2, 2024	Resolving	State Compliance achieved
9189921	July 12, 2024	Informal	State Violation/Reminder Notice

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 144981 · Revised Total Coliform Rule · Revised Total Coliform Rule

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

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189925	July 17, 2024	Informal	State Violation/Reminder Notice
9189926	July 17, 2024	Informal	State Public Notification requested
9189928	July 26, 2024	Resolving	State Compliance achieved
9189955	May 29, 2026	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 144980 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2024 · period end June 30, 2024 · first reported September 30, 2024 · EPA return-to-compliance field June 30, 2024

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189923	July 17, 2024	Informal	State Violation/Reminder Notice
9189924	July 17, 2024	Informal	State Public Notification requested
9189927	July 26, 2024	Resolving	State Compliance achieved
9189956	May 29, 2026	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 144978 · E. COLI · Ground Water Rule

Noncompliance period start October 20, 2023 · period end December 29, 2023 · first reported February 14, 2024 · EPA return-to-compliance field December 29, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189916	December 15, 2023	Informal	State Violation/Reminder Notice
9189917	December 15, 2023	Informal	State Public Notification requested
9189920	December 29, 2023	Resolving	State Compliance achieved
9189954	May 29, 2026	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 144977 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2023 · period end December 29, 2023 · first reported February 14, 2024 · EPA return-to-compliance field December 29, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189918	December 15, 2023	Informal	State Violation/Reminder Notice
9189919	December 15, 2023	Informal	State Public Notification requested
9189920	December 29, 2023	Resolving	State Compliance achieved
9189953	May 29, 2026	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 144976 · E. COLI · Ground Water Rule

Noncompliance period start July 27, 2023 · period end December 29, 2023 · first reported January 2, 2024 · EPA return-to-compliance field December 29, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189914	September 22, 2023	Informal	State Violation/Reminder Notice
9189915	September 22, 2023	Informal	State Public Notification requested
9189920	December 29, 2023	Resolving	State Compliance achieved
9189952	May 29, 2026	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 144906 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts 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
9189897	June 29, 2022	Informal	State Violation/Reminder Notice
9189898	June 29, 2022	Informal	State Public Notification requested
9189899	August 2, 2022	Resolving	State Compliance achieved
9189913	September 7, 2023	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 144897 · E. COLI · Ground Water Rule

Noncompliance period start August 21, 2021 · period end September 7, 2022 · first reported November 16, 2021 · EPA return-to-compliance field September 7, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189881	October 20, 2021	Informal	State Violation/Reminder Notice
9189882	October 20, 2021	Informal	State Public Notification requested
9189900	September 7, 2022	Resolving	State Compliance achieved
9189910	April 4, 2023	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 144896 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start June 1, 2021 · period end June 30, 2021 · first reported September 8, 2021 · EPA return-to-compliance field June 30, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189879	August 13, 2021	Informal	State Violation/Reminder Notice
9189880	August 13, 2021	Informal	State Public Notification requested
9189883	November 24, 2021	Resolving	State Compliance achieved
9189912	April 4, 2023	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 144893 · E. COLI · Ground Water Rule

Noncompliance period start May 21, 2021 · period end May 6, 2021 · first reported September 8, 2021 · EPA return-to-compliance field May 6, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189876	May 6, 2021	Resolving	State Compliance achieved
9189872	July 15, 2021	Informal	State Violation/Reminder Notice
9189873	July 15, 2021	Informal	State Public Notification requested
9189911	April 4, 2023	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 144895 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2021 · period end June 30, 2021 · first reported September 8, 2021 · EPA return-to-compliance field June 30, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189877	August 13, 2021	Informal	State Violation/Reminder Notice
9189878	August 13, 2021	Informal	State Public Notification requested
9189899	August 2, 2022	Resolving	State Compliance achieved
9189908	April 4, 2023	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 144892 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2021 · period end May 6, 2021 · first reported September 8, 2021 · EPA return-to-compliance field May 6, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189876	May 6, 2021	Resolving	State Compliance achieved
9189874	July 15, 2021	Informal	State Violation/Reminder Notice
9189875	July 15, 2021	Informal	State Public Notification requested
9189909	April 4, 2023	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 144890 · E. COLI · Ground Water Rule

Noncompliance period start March 18, 2021 · period end May 6, 2021 · first reported September 8, 2021 · EPA return-to-compliance field May 6, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189876	May 6, 2021	Resolving	State Compliance achieved
9189868	May 14, 2021	Informal	State Violation/Reminder Notice
9189869	May 14, 2021	Informal	State Public Notification requested
9189884	May 14, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 144901 · Nitrate-Nitrite · Nitrate Rule

Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported May 19, 2022 · EPA return-to-compliance field December 31, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189893	March 1, 2022	Informal	State Violation/Reminder Notice
9189894	March 1, 2022	Informal	State Public Notification requested
9189892	March 14, 2022	Resolving	State Compliance achieved
9189907	April 4, 2023	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 144891 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start January 1, 2021 · period end March 31, 2021 · first reported September 8, 2021 · EPA return-to-compliance field March 31, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189876	May 6, 2021	Resolving	State Compliance achieved
9189870	May 14, 2021	Informal	State Violation/Reminder Notice
9189871	May 14, 2021	Informal	State Public Notification requested
9189886	May 14, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 144889 · 2,4-D · Synthetic Organic Chemicals

Noncompliance period start January 1, 2021 · period end March 31, 2021 · first reported September 8, 2021 · EPA return-to-compliance field March 31, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189876	May 6, 2021	Resolving	State Compliance achieved
9189866	May 14, 2021	Informal	State Violation/Reminder Notice
9189867	May 14, 2021	Informal	State Public Notification requested
9189885	May 14, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 144888 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start January 1, 2021 · period end March 31, 2021 · first reported June 24, 2021 · EPA return-to-compliance field March 31, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189864	April 16, 2021	Informal	State Violation/Reminder Notice
9189865	April 16, 2021	Informal	State Public Notification requested
9189876	May 6, 2021	Resolving	State Compliance achieved
9189891	April 16, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 144886 · E. COLI · Ground Water Rule

Noncompliance period start November 20, 2020 · period end May 6, 2021 · first reported March 1, 2021 · EPA return-to-compliance field May 6, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9189860	January 15, 2021	Informal	State Violation/Reminder Notice
9189861	January 15, 2021	Informal	State Public Notification requested
9189876	May 6, 2021	Resolving	State Compliance achieved
9189887	January 15, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 144887 · 2,4-D · Synthetic Organic Chemicals

Noncompliance period start October 1, 2020 · period end December 31, 2020 · first reported March 1, 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
9189862	February 12, 2021	Informal	State Violation/Reminder Notice
9189863	February 12, 2021	Informal	State Public Notification requested
9189876	May 6, 2021	Resolving	State Compliance achieved
9189890	February 12, 2022	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