OK1021756 · Oklahoma
TENKILLER WATERWORKS, INC.
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 10
- EPA health-based flag
- 2
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 7
Counties listed by EPA · Cherokee 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 9 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 30 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 135190 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2025 · period end September 30, 2025 · first reported February 18, 2026 · EPA return-to-compliance field September 30, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9024522 November 21, 2025 Informal State Violation/Reminder Notice 9024523 November 21, 2025 Informal State Public Notification requested 9024525 February 2, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 135189 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2025 · period end September 30, 2025 · first reported February 18, 2026 · EPA return-to-compliance field September 30, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9024522 November 21, 2025 Informal State Violation/Reminder Notice 9024523 November 21, 2025 Informal State Public Notification requested 9024525 February 2, 2026 Resolving State Compliance achieved Other or unclassified · Unaddressed by formal action
Consumer Confidence Report Complete Failure to ReportViolation 135188 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2025 · first reported November 14, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9024526 August 19, 2025 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 135187 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start April 1, 2025 · period end April 30, 2025 · first reported August 13, 2025 · EPA return-to-compliance field April 30, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9024518 June 27, 2025 Informal State Violation/Reminder Notice 9024519 June 27, 2025 Informal State Public Notification requested 9024521 July 1, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 135186 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start April 1, 2025 · period end April 30, 2025 · first reported August 13, 2025 · EPA return-to-compliance field April 30, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9024518 June 27, 2025 Informal State Violation/Reminder Notice 9024519 June 27, 2025 Informal State Public Notification requested 9024520 July 1, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 135184 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment RuleNoncompliance period start December 1, 2024 · period end December 31, 2024 · first reported May 15, 2025 · EPA return-to-compliance field December 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9024515 March 6, 2025 Informal State Violation/Reminder Notice 9024516 March 6, 2025 Informal State Public Notification requested 9024517 April 1, 2025 Resolving State Compliance achieved EPA health-based flag · Resolved
Treatment Technique (SWTR and GWR)Violation 135182 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start July 1, 2022 · period end July 31, 2022 · first reported March 27, 2023 · EPA return-to-compliance field July 31, 2022
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9024448 May 21, 2018 Formal State Administrative/Compliance Order with penalty issued 9024510 November 15, 2022 Formal State Administrative/Compliance Order without penalty issued 9024511 November 15, 2022 Informal State Public Notification requested 9024512 December 8, 2022 Informal State Public Notification received 9024514 March 25, 2024 Resolving State Compliance achieved EPA health-based flag · Resolved
Monthly Turbidity Exceed (Enhanced SWTR)Violation 135181 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment RuleNoncompliance period start July 1, 2022 · period end July 31, 2022 · first reported March 27, 2023 · EPA return-to-compliance field July 31, 2022
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9024448 May 21, 2018 Formal State Administrative/Compliance Order with penalty issued 9024510 November 15, 2022 Formal State Administrative/Compliance Order without penalty issued 9024511 November 15, 2022 Informal State Public Notification requested 9024512 December 8, 2022 Informal State Public Notification received 9024514 March 25, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 135177 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment RuleNoncompliance period start April 1, 2022 · period end April 30, 2022 · first reported September 26, 2022 · EPA return-to-compliance field April 30, 2022
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9024504 June 29, 2022 Informal State Violation/Reminder Notice 9024505 June 29, 2022 Informal State Public Notification requested 9024507 August 2, 2022 Resolving State Compliance achieved 9024513 July 5, 2023 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, Turbidity (Enhanced SWTR)Violation 135149 · Interim Enhanced Surface Water Treatment Rule · Interim and Long Term 1 Enhanced Surface Water Treatment RuleNoncompliance period start November 1, 2020 · period end November 30, 2020 · first reported March 1, 2021 · EPA return-to-compliance field November 30, 2020
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9024466 January 15, 2021 Informal State Violation/Reminder Notice 9024467 January 15, 2021 Informal State Public Notification requested 9024473 November 16, 2021 Resolving State Compliance achieved 9024500 January 15, 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