Public water system record

Anadarko Public Works Authority

Serves Anadarko, Caddo County, OK · 6,804 people served

Federal records show 50 health-based violations and 12 monitoring/reporting issues for Anadarko Public Works Authority in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • OK1010806
  • ANADARKO
  • OK
  • 6,804 served

System profile

Source water Surface water
ZIP 73005
EPA system ID OK1010806

Verify this system on EPA ECHO →

Health-based violations, last 10 years
50
Resolved
50
Unresolved
0
Any acute record
Yes
Monitoring issues, last 10 years
12

Key facts

  • Anadarko Public Works Authority draws water from 1 surface water intake.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.097 mg/L, federal limit 0.08 mg/L (1.2 times the limit), 2020.
  • Most recent formal enforcement: compliance order (no penalty) by Oklahoma, July 2025.
  • Record on file since 1993, with 33 health-based violations before October 19, 2016.
  • Lead pipe inventory: 1 lead and 2,669 unknown out of 2,679 service lines.

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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 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
220 Apr 1, 2025 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
220 Apr 1, 2025 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
220 Jan 1, 2025 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 Oct 1, 2024 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 Oct 1, 2024 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 Jul 1, 2024 Resolved No
Surface Water Treatment Rule
Treatment technique failure
120 Jun 1, 2023 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
120 Apr 1, 2023 Resolved Yes
Surface Water Treatment Rule
Treatment technique failure
120 Dec 1, 2022 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
120 Dec 1, 2022 Resolved Yes
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, 2022 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
220 Oct 1, 2022 Resolved No
Surface Water Treatment Rule
Treatment technique failure
120 Oct 1, 2022 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
120 Oct 1, 2022 Resolved Yes
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
220 Jul 1, 2022 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
220 Jul 1, 2022 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
220 Apr 1, 2022 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.095 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
220 Apr 1, 2022 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
220 Jan 1, 2022 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
220 Jan 1, 2022 Resolved No
CARBON, TOTAL
Treatment technique failure
210 Jan 1, 2022 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 Oct 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
220 Apr 1, 2021 Resolved 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, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
220 Jan 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.096 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
220 Jan 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.097 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
220 Oct 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.094 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
220 Oct 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
220 Jul 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.096 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
220 Jul 1, 2020 Resolved No
Surface Water Treatment Rule
Treatment technique failure
120 Apr 1, 2020 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
120 Apr 1, 2020 Resolved Yes
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, 2020 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
120 Mar 1, 2020 Resolved Yes
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
120 Mar 1, 2020 Resolved Yes
Surface Water Treatment Rule
Treatment technique failure
120 Feb 1, 2020 Resolved No
Surface Water Treatment Rule
Treatment technique failure
120 Jan 1, 2020 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
120 Jan 1, 2020 Resolved Yes
Surface Water Treatment Rule
Treatment technique failure
120 Dec 1, 2019 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
120 Dec 1, 2019 Resolved Yes
Surface Water Treatment Rule
Treatment technique failure
120 Nov 1, 2019 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
120 Nov 1, 2019 Resolved Yes
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 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
220 Jan 1, 2019 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.088 mg/L, federal limit 0.08 mg/L (1.1 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 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
220 Jan 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 Oct 1, 2017 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 Apr 1, 2017 Resolved No
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
120 Nov 1, 2016 Resolved Yes

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Revised Total Coliform Rule
Monitoring violation
Jun 1, 2024 Resolved
CARBON, TOTAL
Monitoring and reporting
Jun 1, 2024 Resolved
CARBON, TOTAL
Monitoring and reporting
Jun 1, 2024 Resolved
Chlorine
Monitoring and reporting
Jun 1, 2024 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
Feb 1, 2020 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
Dec 1, 2019 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
Aug 1, 2018 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
Aug 1, 2018 Resolved
Chlorine
Monitoring and reporting
Jul 1, 2018 Resolved
Revised Total Coliform Rule
Monitoring violation
Jun 1, 2018 Resolved
Chlorine
Monitoring and reporting
Jul 1, 2017 Resolved
Revised Total Coliform Rule
Monitoring violation
Jul 1, 2017 Resolved

Full record since 1993

EPA's records for Anadarko Public Works Authority go back to 1993. Before October 19, 2016 they list 33 health-based violations (32 resolved, 1 archived by EPA without a recorded fix) and 26 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 5 6
2000s 14 20
2010 to October 18, 2016 14 0
October 19, 2016 to 2019 12 7
2020s 38 5

Most recent health-based violation before October 19, 2016: Total Coliform, began September 2015, Resolved.

Show all 33 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
Sep 1, 2015 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
Dec 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
Oct 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
Jul 1, 2014 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
Sep 1, 2013 Resolved
Total Coliform
Contaminant limit exceeded
Aug 1, 2013 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
Sep 1, 2012 Resolved
Total Coliform
Contaminant limit exceeded
Jul 1, 2012 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
Aug 1, 2011 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
May 1, 2011 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
Apr 1, 2011 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
Mar 1, 2011 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
Feb 1, 2011 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
Nov 1, 2010 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
Apr 1, 2007 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
Oct 1, 2006 Resolved
Total Coliform
Contaminant limit exceeded
Aug 1, 2006 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
Aug 1, 2006 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
Dec 1, 2005 Resolved
CARBON, TOTAL
Treatment technique failure
Jul 1, 2005 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
May 1, 2005 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Apr 1, 2005 Resolved
CARBON, TOTAL
Treatment technique failure
Apr 1, 2005 Resolved
CARBON, TOTAL
Treatment technique failure
Jan 1, 2005 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Jan 1, 2005 Resolved
CARBON, TOTAL
Treatment technique failure
Oct 1, 2004 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Oct 1, 2004 Resolved
Surface Water Treatment Rule
Treatment technique failure
Sep 1, 2002 Resolved
Surface Water Treatment Rule
Treatment technique failure
Jan 1, 1996 Resolved
Total Coliform
Contaminant limit exceeded
Sep 1, 1995 Resolved
Total Coliform
Contaminant limit exceeded
Jun 1, 1995 Resolved
Surface Water Treatment Rule
Treatment technique failure
Jun 1, 1995 Resolved
Surface Water Treatment Rule
Treatment technique failure
Jul 1, 1993 Archived

Enforcement actions

Oklahoma regulators took 44 formal enforcement actions against Anadarko Public Works Authority between 1995 and 2025, filed as 45 records in EPA's data. The most recent was a compliance order (no penalty) in July 2025.

Date By Action Violations covered
Jul 1, 2025 Oklahoma Compliance order (no penalty) 2 violations (2 health-based): Total Trihalomethanes (TTHMs)
May 8, 2025 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Jan 7, 2025 Oklahoma Compliance order (no penalty) 3 violations (3 health-based): Total Trihalomethanes (TTHMs)
Sep 5, 2024 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Aug 2, 2023 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Surface Water Treatment Rule
Jul 6, 2023 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Feb 23, 2023 Oklahoma Compliance order (no penalty) 2 violations (2 health-based): Interim Enhanced Surface Water Treatment Rule, Surface Water Treatment Rule
Jan 3, 2023 Oklahoma Compliance order (no penalty) 2 violations (2 health-based): Interim Enhanced Surface Water Treatment Rule, Surface Water Treatment Rule
Jun 28, 2021 Oklahoma Compliance order with a penalty 19 violations (19 health-based): Total Trihalomethanes (TTHMs), CARBON, TOTAL
May 6, 2021 Oklahoma Compliance order (no penalty) 4 violations (4 health-based): Total Trihalomethanes (TTHMs)
Nov 20, 2020 Oklahoma Compliance order (no penalty) 2 violations (2 health-based): Total Trihalomethanes (TTHMs)
Sep 29, 2020 Oklahoma Compliance order (no penalty) 2 violations (2 health-based): Interim Enhanced Surface Water Treatment Rule, Surface Water Treatment Rule
Sep 18, 2020 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Jun 12, 2020 Oklahoma Compliance order (no penalty) 3 violations (3 health-based): Surface Water Treatment Rule, Interim Enhanced Surface Water Treatment Rule
Mar 10, 2020 Oklahoma Compliance order (no penalty) 2 violations (2 health-based): Surface Water Treatment Rule, Interim Enhanced Surface Water Treatment Rule
Feb 4, 2020 Oklahoma Compliance order (no penalty) 2 violations (2 health-based): Surface Water Treatment Rule, Interim Enhanced Surface Water Treatment Rule
Jan 13, 2020 Oklahoma Compliance order (no penalty) 2 violations (2 health-based): Surface Water Treatment Rule, Interim Enhanced Surface Water Treatment Rule
Sep 12, 2019 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Mar 7, 2019 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Feb 5, 2019 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Oct 4, 2018 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Feb 28, 2018 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Nov 27, 2017 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Jun 27, 2017 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Jan 17, 2017 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Mar 11, 2015 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Feb 10, 2015 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Oct 29, 2014 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Nov 4, 2013 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Dec 4, 2012 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Aug 22, 2011 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Jun 13, 2011 Oklahoma Compliance order with a penalty 4 violations (4 health-based): Interim Enhanced Surface Water Treatment Rule
Feb 16, 2007 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Oct 3, 2006 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Jan 31, 2006 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Jan 4, 2006 Oklahoma Compliance order with a penalty 3 violations (3 health-based): CARBON, TOTAL, Total Trihalomethanes (TTHMs)
Nov 14, 2005 Oklahoma Compliance order with a penalty 2 violations (2 health-based): Total Trihalomethanes (TTHMs), CARBON, TOTAL
Jul 19, 2005 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Mar 21, 2005 Oklahoma Compliance order with a penalty 2 violations (2 health-based): CARBON, TOTAL, Total Trihalomethanes (TTHMs)
Nov 18, 2002 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Surface Water Treatment Rule
May 18, 2001 Oklahoma Compliance order with a penalty 20 violations: o-Dichlorobenzene, p-Dichlorobenzene, 1,1-Dichloroethylene, trans-1,2-Dichloroethylene, 1,1,1-Trichloroethane
Feb 20, 1996 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Surface Water Treatment Rule
Oct 19, 1995 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Coliform
Jul 19, 1995 Oklahoma Compliance order (no penalty) 2 violations (2 health-based): Total Coliform

What the violations mean

Total Trihalomethanes (TTHMs)

31 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Interim Enhanced Surface Water Treatment Rule

10 incidents

The system did not meet a filtration or treatment requirement for surface water

Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through

Surface Water Treatment Rule

8 incidents

The system did not complete a treatment step or action that the Surface Water Treatment Rule requires (a treatment technique violation).

The utility had to notify customers about each of these violations.

CARBON, TOTAL

1 incident

The system did not complete a treatment step or action that federal rules require for CARBON, TOTAL (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Anadarko Public Works Authority draws water from 1 surface water intake.

Annual water quality report

Anadarko Public Works 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.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

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.