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Public water system record

Duke Public Water Authority

Serves East Duke, Jackson County, OK · 425 people served

Federal records show 18 health-based violations and 5 monitoring/reporting issues for Duke Public Water Authority in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

  • OK3003311
  • DUKE
  • OK
  • 425 served

System profile

Source water Purchased surface water
ZIP 73532
EPA system ID OK3003311

Verify this system on EPA ECHO →

Health-based violations, last 10 years
18
Resolved
6
Unresolved
1
Archived by EPA
11
Any acute record
No
Monitoring issues, last 10 years
5

Key facts

  • Duke Public Water Authority buys its water from Altus.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.146 mg/L, federal limit 0.08 mg/L (1.8 times the limit), 2024.
  • Most recent formal enforcement: compliance order with a penalty by Oklahoma, July 2023.
  • Record on file since 2010, with 4 health-based violations before October 19, 2016.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Apr 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.117 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
 220 Jan 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
 350 Oct 17, 2024 Active No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.145 mg/L, federal limit 0.08 mg/L (1.8 times the limit)
 220 Oct 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.146 mg/L, federal limit 0.08 mg/L (1.8 times the limit)
 220 Jul 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.125 mg/L, federal limit 0.08 mg/L (1.6 times the limit)
 220 Apr 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jan 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Apr 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.095 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.107 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Oct 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.099 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Jul 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jul 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Apr 1, 2019 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Jan 1, 2019 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Oct 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jul 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Apr 1, 2018 Resolved No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
LEAD AND COPPER RULE REVISIONS
RPT
 Oct 17, 2024 Active
Lead and Copper Rule
Monitoring and reporting
 Oct 1, 2019 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Apr 1, 2018 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Dec 30, 2017 Resolved
Lead and Copper Rule
Monitoring and reporting
 Oct 1, 2016 Resolved

Full record since 2010

EPA's records for Duke Public Water Authority go back to 2010. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 16 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2010 to October 18, 2016 4 16
October 19, 2016 to 2019 5 3
2020s 13 1

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began July 2014, Resolved.

Show all 4 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 Jul 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.107 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 Apr 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.137 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
 Jan 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.202 mg/L, federal limit 0.08 mg/L (2.5 times the limit)
 Oct 1, 2013 Resolved

Enforcement actions

Oklahoma regulators took 13 formal enforcement actions against Duke Public Water Authority between 2012 and 2023. The most recent was a compliance order with a penalty in July 2023.

Date By Action Violations covered
Jul 25, 2023 Oklahoma Compliance order with a penalty 12 violations (12 health-based): Total Trihalomethanes (TTHMs)
May 30, 2023 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Mar 22, 2023 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Nov 15, 2022 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Dec 8, 2020 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Jun 28, 2019 Oklahoma Compliance order (no penalty) 2 violations (2 health-based): Total Trihalomethanes (TTHMs)
Feb 5, 2019 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Oct 12, 2018 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Jun 19, 2018 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Oct 2, 2014 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Jul 31, 2014 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Jun 18, 2014 Oklahoma Compliance order with a penalty 2 violations (2 health-based): Total Trihalomethanes (TTHMs)
Oct 16, 2012 Oklahoma Compliance order with a penalty 3 violations: Consumer Confidence Rule

What the violations mean

Total Trihalomethanes (TTHMs)

17 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

LEAD AND COPPER RULE REVISIONS

1 incident

The system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Duke Public Water Authority buys its water from Altus. It lists no wells or intakes of its own. It also has an emergency connection to Duke Central Vue Water. 1 other public water system has an emergency connection to Duke Public Water Authority.

Buys water from

Emergency or part-time connections to

Annual water quality report

Duke Public Water Authority must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Duke Public Water Authority for a copy.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Oklahoma.

Certified drinking water labs by state EPA guidance for private wells