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Public water system record

Okmulgee Co. RWD #7 (Nuyaka)

Serves an area of Okmulgee County, OK that includes Okmulgee · 2,357 people served

Federal records show 61 health-based violations and 18 monitoring/reporting issues for Okmulgee Co. RWD #7 (Nuyaka) in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.

  • OK3005608
  • OKMULGEE
  • OK
  • 2,357 served

System profile

Source water Purchased surface water
ZIP 74447
EPA system ID OK3005608

Verify this system on EPA ECHO →

Health-based violations, last 10 years
61
Resolved
47
Unresolved
0
Archived by EPA
14
Any acute record
No
Monitoring issues, last 10 years
18

Key facts

  • Okmulgee Co. RWD #7 (Nuyaka) buys its water from Okmulgee PWA.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.139 mg/L, federal limit 0.08 mg/L (1.7 times the limit), 2020.
  • Most recent formal enforcement: compliance order with a penalty by Oklahoma, July 2020.
  • Record on file since 1991, with 12 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 1,382 service lines.

Check whether Okmulgee Co. RWD #7 (Nuyaka) serves your address

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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
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
 350 Oct 17, 2024 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
 220 Jul 1, 2022 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Jul 1, 2022 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 Apr 1, 2022 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.077 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
 220 Apr 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 Apr 1, 2022 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.077 mg/L, federal limit 0.06 mg/L (1.3 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 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jan 1, 2022 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.08 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
 220 Jan 1, 2022 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.08 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
 220 Jan 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 0.097 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Oct 1, 2021 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 Oct 1, 2021 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
 220 Oct 1, 2021 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.06 mg/L (1.4 times 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 Jul 1, 2021 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 Jul 1, 2021 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.076 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
 220 Jul 1, 2021 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.074 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 220 Jul 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Apr 1, 2021 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 Apr 1, 2021 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.068 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Apr 1, 2021 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 220 Apr 1, 2021 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 0.101 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Jan 1, 2021 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 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jan 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.078 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
 220 Jan 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.077 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
 220 Jan 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.108 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
 220 Oct 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.109 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
 220 Oct 1, 2020 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.088 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
 220 Oct 1, 2020 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
 220 Oct 1, 2020 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 0.12 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
 220 Jul 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.136 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
 220 Jul 1, 2020 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
 220 Jul 1, 2020 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
 220 Jul 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.139 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
 220 Apr 1, 2020 Resolved 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, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
 220 Apr 1, 2020 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
 220 Apr 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.115 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
 220 Jan 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.138 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
 220 Jan 1, 2020 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
 220 Jan 1, 2020 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
 220 Jan 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.119 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
 220 Oct 1, 2019 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 Oct 1, 2019 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.073 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 220 Oct 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 Jul 1, 2019 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.066 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Jul 1, 2019 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 0.121 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
 220 Apr 1, 2019 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.077 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
 220 Apr 1, 2019 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, 2019 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.071 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 220 Jan 1, 2019 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.12 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
 220 Oct 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.118 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
 220 Jul 1, 2018 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 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Apr 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.105 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Jan 1, 2018 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 0.11 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
 220 Oct 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.098 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Jul 1, 2017 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 Apr 1, 2017 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Jan 1, 2017 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 Jan 1, 2017 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 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jul 1, 2024 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jul 1, 2023 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Jun 30, 2022 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Jun 30, 2022 Resolved
Chlorine
Monitoring and reporting
 Apr 1, 2020 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Mar 31, 2020 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Mar 31, 2020 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Dec 30, 2019 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Dec 30, 2019 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Sep 29, 2019 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Sep 29, 2019 Resolved
Revised Total Coliform Rule
Monitoring violation
 Aug 1, 2019 Resolved
Chlorine
Monitoring and reporting
 Jul 1, 2019 Resolved
Revised Total Coliform Rule
Monitoring violation
 Sep 1, 2018 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Aug 1, 2018 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Aug 1, 2018 Resolved
Lead and Copper Rule
Monitoring and reporting
 Oct 1, 2016 Resolved

Full record since 1991

EPA's records for Okmulgee Co. RWD #7 (Nuyaka) go back to 1991. Before October 19, 2016 they list 12 health-based violations (12 resolved) and 8 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 1 2
2000s 2 4
2010 to October 18, 2016 9 2
October 19, 2016 to 2019 18 9
2020s 43 8

Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began April 2016, Resolved.

Show all 12 health-based violations before October 19, 2016
Contaminant Start date Status
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.069 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 Apr 1, 2016 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jul 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.094 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Apr 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jan 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Oct 1, 2013 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
 Jul 1, 2013 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Apr 1, 2013 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jan 1, 2013 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
 Oct 1, 2012 Resolved
Total Coliform
Contaminant limit exceeded
 May 1, 2001 Resolved
Total Coliform
Contaminant limit exceeded
 Apr 1, 2001 Resolved
Total Coliform
Contaminant limit exceeded
 Jun 1, 1991 Resolved

Enforcement actions

Oklahoma regulators took 10 formal enforcement actions against Okmulgee Co. RWD #7 (Nuyaka) between 1991 and 2020, filed as 11 records in EPA's data. The most recent was a compliance order with a penalty in July 2020.

Date By Action Violations covered
Jul 23, 2020 Oklahoma Compliance order with a penalty 62 violations (60 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
Nov 6, 2018 Oklahoma Compliance order with a penalty 25 violations (25 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
Sep 24, 2018 Oklahoma Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Apr 23, 2018 Oklahoma Compliance order (no penalty) 2 violations (2 health-based): Total Trihalomethanes (TTHMs)
Sep 8, 2017 Oklahoma Compliance order with a penalty 4 violations (4 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
Jul 14, 2016 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Haloacetic Acids (HAA5)
Sep 18, 2014 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Jul 30, 2014 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
May 27, 2014 Oklahoma Compliance order with a penalty 7 violations (7 health-based): Total Trihalomethanes (TTHMs)
Jul 18, 1991 Oklahoma Compliance order with a penalty 1 violation (1 health-based): Total Coliform

What the violations mean

Total Trihalomethanes (TTHMs)

33 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Haloacetic Acids (HAA5)

27 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase 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

Okmulgee Co. RWD #7 (Nuyaka) buys its water from Okmulgee PWA. It lists no wells or intakes of its own. It also has an emergency connection to Okmulgee Co. RWD #6 (Hectorville).

Buys water from

Emergency or part-time connections to

Annual water quality report

Okmulgee Co. RWD #7 (Nuyaka) 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.

Certified drinking water labs by state EPA guidance for private wells