Public water system record

Muskogee Co. RWD #9

Serves an area of Muskogee County, OK that includes Muskogee · 300 people served

Federal records show 26 health-based violations and 8 monitoring/reporting issues for Muskogee Co. RWD #9 in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

OK3005119
MUSKOGEE
OK
300 served

System profile

Source water Purchased surface water

ZIP 74401

EPA system ID OK3005119

Verify this system on EPA ECHO →

Health-based violations, last 10 years: 26
Resolved: 0
Unresolved: 1
Archived by EPA: 25
Any acute record: No
Monitoring issues, last 10 years: 8

Key facts

Muskogee Co. RWD #9 buys its water from Muskogee.
Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.099 mg/L, federal limit 0.06 mg/L (1.7 times the limit), 2019.
Most recent formal enforcement: compliance order with a penalty by Oklahoma, September 2021.
Record on file since 1991, with 12 health-based violations before October 19, 2016.

Check whether Muskogee Co. RWD #9 serves your address

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
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, 2025	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 0.085 mg/L, federal limit 0.06 mg/L (1.4 times the limit)	220	Jul 1, 2025	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 0.075 mg/L, federal limit 0.06 mg/L (1.3 times 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
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.072 mg/L, federal limit 0.06 mg/L (1.2 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
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.067 mg/L, federal limit 0.06 mg/L (1.1 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
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, 2024	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 0.061 mg/L, federal limit 0.06 mg/L (at or just above 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
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, 2023	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, 2023	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 0.076 mg/L, federal limit 0.06 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
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.072 mg/L, federal limit 0.06 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
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.069 mg/L, federal limit 0.06 mg/L (1.2 times the limit)	220	Apr 1, 2022	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 0.07 mg/L, federal limit 0.06 mg/L (1.2 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
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.071 mg/L, federal limit 0.06 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
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.069 mg/L, federal limit 0.06 mg/L (1.2 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
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.063 mg/L, federal limit 0.06 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
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, 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 0.065 mg/L, federal limit 0.06 mg/L (1.1 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
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.084 mg/L, federal limit 0.06 mg/L (1.4 times the limit)	220	Jul 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 0.084 mg/L, federal limit 0.06 mg/L (1.4 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 0.082 mg/L, federal limit 0.06 mg/L (1.4 times the limit)	220	Jan 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 0.088 mg/L, federal limit 0.08 mg/L (1.1 times the limit)	220	Oct 1, 2019	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 0.099 mg/L, federal limit 0.06 mg/L (1.7 times the limit)	220	Oct 1, 2019	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 0.068 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
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.063 mg/L, federal limit 0.06 mg/L (1.1 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

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 Monitoring and reporting	Oct 1, 2025	Active
Haloacetic Acids (HAA5) Monitoring and reporting	Jun 30, 2025	Resolved
Haloacetic Acids (HAA5) Monitoring and reporting	Dec 30, 2024	Resolved
LEAD AND COPPER RULE REVISIONS RPT	Oct 17, 2024	Active
Lead and Copper Rule Monitoring and reporting	Oct 1, 2022	Active
Haloacetic Acids (HAA5) Monitoring and reporting	Jun 30, 2022	Resolved
Haloacetic Acids (HAA5) Monitoring and reporting	Sep 29, 2021	Resolved
Haloacetic Acids (HAA5) Monitoring and reporting	Apr 1, 2021	Resolved

Full record since 1991

EPA's records for Muskogee Co. RWD #9 go back to 1991. Before October 19, 2016 they list 12 health-based violations (12 resolved) and 30 monitoring or reporting violations.

Violations that began in	Health-based	Monitoring and reporting
1990s	0	9
2000s	1	15
2010 to October 18, 2016	11	6
October 19, 2016 to 2019	4	0
2020s	22	8

Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began October 2015, Resolved.

Show all 12 health-based violations before October 19, 2016

Contaminant	Start date	Status
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)	Oct 1, 2015	Resolved
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.069 mg/L, federal limit 0.06 mg/L (1.2 times the limit)	Jul 1, 2015	Resolved
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)	Jan 1, 2015	Resolved
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.109 mg/L, federal limit 0.08 mg/L (1.4 times the limit)	Oct 1, 2014	Resolved
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)	Oct 1, 2014	Resolved
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.113 mg/L, federal limit 0.08 mg/L (1.4 times the limit)	Jul 1, 2014	Resolved
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.117 mg/L, federal limit 0.08 mg/L (1.5 times the limit)	Apr 1, 2014	Resolved
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.067 mg/L, federal limit 0.06 mg/L (1.1 times the limit)	Apr 1, 2014	Resolved
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)	Jan 1, 2014	Resolved
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.068 mg/L, federal limit 0.06 mg/L (1.1 times the limit)	Jan 1, 2014	Resolved
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)	Oct 1, 2013	Resolved
Total Coliform Contaminant limit exceeded	Sep 1, 2003	Resolved

Enforcement actions

Oklahoma regulators took 16 formal enforcement actions against Muskogee Co. RWD #9 between 2014 and 2021. The most recent was a compliance order with a penalty in September 2021.

Date	By	Action	Violations covered
Sep 10, 2021	Oklahoma	Compliance order with a penalty	25 violations (25 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Jul 7, 2021	Oklahoma	Compliance order (no penalty)	2 violations (2 health-based): Haloacetic Acids (HAA5)
Mar 12, 2021	Oklahoma	Compliance order (no penalty)	1 violation (1 health-based): Haloacetic Acids (HAA5)
Dec 8, 2020	Oklahoma	Compliance order (no penalty)	1 violation (1 health-based): Haloacetic Acids (HAA5)
Aug 7, 2020	Oklahoma	Compliance order (no penalty)	1 violation (1 health-based): Haloacetic Acids (HAA5)
May 1, 2020	Oklahoma	Compliance order (no penalty)	3 violations (3 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Oct 7, 2019	Oklahoma	Compliance order (no penalty)	1 violation (1 health-based): Haloacetic Acids (HAA5)
Aug 15, 2019	Oklahoma	Compliance order (no penalty)	1 violation (1 health-based): Haloacetic Acids (HAA5)
Jul 14, 2016	Oklahoma	Compliance order with a penalty	11 violations (11 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Mar 21, 2016	Oklahoma	Compliance order with a penalty	1 violation (1 health-based): Haloacetic Acids (HAA5)
Oct 30, 2015	Oklahoma	Compliance order with a penalty	1 violation (1 health-based): Haloacetic Acids (HAA5)
May 1, 2015	Oklahoma	Compliance order with a penalty	1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Feb 11, 2015	Oklahoma	Compliance order with a penalty	2 violations (2 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Oct 2, 2014	Oklahoma	Compliance order with a penalty	1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Aug 7, 2014	Oklahoma	Compliance order with a penalty	2 violations (2 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
May 13, 2014	Oklahoma	Compliance order with a penalty	3 violations (3 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)

What the violations mean

Haloacetic Acids (HAA5)

24 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.

Total Trihalomethanes (TTHMs)

1 incident

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Muskogee Co. RWD #9 buys its water from Muskogee. It lists no wells or intakes of its own.

Buys water from

Muskogee Muskogee, OK

Annual water quality report

Muskogee Co. RWD #9 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 Muskogee Co. RWD #9 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