Is MAYES CO RWD # 7 required to publish a Consumer Confidence Report?

Yes. MAYES CO RWD # 7 is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is MAYES CO RWD # 7’s next Consumer Confidence Report due?

MAYES CO RWD # 7’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

LOCUST GROVE, OK · Mayes County

MAYES CO RWD # 7 Water System

Consumer Confidence Report status

MAYES CO RWD # 7 must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show 1 open health-based violation for MAYES CO RWD # 7, alongside 2 other open items.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Oklahoma’s official records. Always confirm current status with Oklahoma before making decisions based on this information.

System facts

System ID (PWSID): OK3004627
System type: Community Water System
Population served: 538
Service connections: 215
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

MAYES CO RWD # 7 is one of 511 community water systems in Oklahoma in the 501 to 3,300 people size category, serving 538 people from surface water.

As of August 1, 2026, its federal record holds 28 entries between 1998 and 2025, of which 1 health-based item remains open, alongside 2 other open entries.

Of the 28, 22 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Stage 2 Disinfectants and Disinfection Byproducts Rule, the Stage 1 Disinfectants and Disinfection Byproducts Rule, and the Total Coliform Rules.

Violation history

Failure Submit IDSE/Subpart V Plan Rpt
—
TTHM
December 30, 2025
Unaddressed
LSL Reporting
—
LEAD AND COPPER RULE REVISIONS
October 17, 2024
Addressed
LSL Inventory
Health-based
LEAD AND COPPER RULE REVISIONS
October 17, 2024
Addressed
Monitoring and Reporting (DBP)
—
Chlorine
June 1, 2024 – June 30, 2024
Resolved
Failure Submit IDSE/Subpart V Plan Rpt
—
TTHM
March 31, 2020 – October 28, 2020
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
March 1, 2018 – May 31, 2018
Resolved
Monitoring and Reporting (DBP)
—
TTHM
March 1, 2018 – May 31, 2018
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2017 – December 14, 2017
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2016 – January 12, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2015 – December 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2015 – September 30, 2015
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
March 1, 2015 – May 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
TTHM
March 1, 2015 – May 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
December 1, 2014 – February 28, 2015
Resolved
Monitoring and Reporting (DBP)
—
TTHM
December 1, 2014 – February 28, 2015
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
March 1, 2014 – May 31, 2014
Resolved
Monitoring and Reporting (DBP)
—
TTHM
March 1, 2014 – May 31, 2014
Resolved
Monitoring and Reporting (DBP)
—
TTHM
December 1, 2013 – February 28, 2014
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
December 1, 2013 – February 28, 2014
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 2013 – November 30, 2013
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
September 1, 2013 – November 30, 2013
Resolved
Monitoring and Reporting (DBP)
—
TTHM
September 1, 2013 – November 30, 2013
Resolved
Monitoring and Reporting (DBP)
—
TTHM
December 1, 2012 – February 28, 2013
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
December 1, 2012 – February 28, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2012 – September 30, 2012
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2012 – February 28, 2012
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2012 – February 28, 2012
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1998 – September 30, 1998
Resolved

Unaddressed no corrective action on record yetAddressed corrective action reported, pending final confirmationResolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
December 30, 2025	Failure Submit IDSE/Subpart V Plan Rpt	TTHM	—	Unaddressed
October 17, 2024	LSL Reporting	LEAD AND COPPER RULE REVISIONS	—	Addressed
October 17, 2024	LSL Inventory	LEAD AND COPPER RULE REVISIONS	Health-based	Addressed
June 1, 2024 – June 30, 2024	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
March 31, 2020 – October 28, 2020	Failure Submit IDSE/Subpart V Plan Rpt	TTHM	—	Resolved
March 1, 2018 – May 31, 2018	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
March 1, 2018 – May 31, 2018	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2017 – December 14, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2016 – January 12, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 1, 2015 – December 31, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2015 – September 30, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
March 1, 2015 – May 31, 2015	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
March 1, 2015 – May 31, 2015	Monitoring and Reporting (DBP)	TTHM	—	Resolved
December 1, 2014 – February 28, 2015	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
December 1, 2014 – February 28, 2015	Monitoring and Reporting (DBP)	TTHM	—	Resolved
March 1, 2014 – May 31, 2014	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
March 1, 2014 – May 31, 2014	Monitoring and Reporting (DBP)	TTHM	—	Resolved
December 1, 2013 – February 28, 2014	Monitoring and Reporting (DBP)	TTHM	—	Resolved
December 1, 2013 – February 28, 2014	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
November 1, 2013 – November 30, 2013	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 2013 – November 30, 2013	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
September 1, 2013 – November 30, 2013	Monitoring and Reporting (DBP)	TTHM	—	Resolved
December 1, 2012 – February 28, 2013	Monitoring and Reporting (DBP)	TTHM	—	Resolved
December 1, 2012 – February 28, 2013	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
September 1, 2012 – September 30, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2012 – February 28, 2012	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2012 – February 28, 2012	Monitoring and Reporting (DBP)	TTHM	—	Resolved
September 1, 1998 – September 30, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved

Unaddressed no corrective action on record yetAddressed corrective action reported, pending final confirmationResolved addressed and confirmed by the state

Enforcement actions

No enforcement actions on record for this system.

Common questions

Is MAYES CO RWD # 7 required to publish a Consumer Confidence Report?: Yes. MAYES CO RWD # 7 is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is MAYES CO RWD # 7’s next Consumer Confidence Report due?: MAYES CO RWD # 7’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MAYES CO RWD # 7 have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 1 open health-based violation for MAYES CO RWD # 7, alongside 2 other open items.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

MAYES CO RWD # 7

918-386-2692

LOCUST GROVE, OK 74352