Is Mariano Lake-Pinedale-Church Rock NTUA required to publish a Consumer Confidence Report?

Yes. Mariano Lake-Pinedale-Church Rock NTUA 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 Mariano Lake-Pinedale-Church Rock NTUA’s next Consumer Confidence Report due?

Mariano Lake-Pinedale-Church Rock NTUA’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.

Ft Defiance, NN

Mariano Lake-Pinedale-Church Rock NTUA Water System

Consumer Confidence Report status

Mariano Lake-Pinedale-Church Rock NTUA 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 item for Mariano Lake-Pinedale-Church Rock NTUA that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.

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 Navajo Nation’s official records. Always confirm current status with Navajo Nation before making decisions based on this information.

System facts

System ID (PWSID): NN3500211
System type: Community Water System
Population served: 4,562
Service connections: 1,334
Ownership: Native American tribal
Water source: groundwater (wells)

Mariano Lake-Pinedale-Church Rock NTUA is among the 8 largest community water systems in Navajo Nation, serving 4,562 people from groundwater.

As of August 1, 2026, its federal record holds 34 entries between 2003 and 2021, of which 1 remains open; none are health-based.

Of the 34, 29 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 Total Coliform Rules, synthetic organic chemicals, and volatile organic chemicals.

Violation history

Monitoring, Regular
—
Fluoride
January 1, 2021 – December 31, 2021
Resolved
Monitoring, Routine (IDSE)
—
Total Haloacetic Acids (HAA5)
January 1, 2020 – December 31, 2020
Resolved
Monitoring, Regular
—
Fluoride
January 1, 2020 – December 31, 2020
Resolved
Monitoring, Routine (IDSE)
—
TTHM
January 1, 2020 – December 31, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2017 – April 30, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2017 – March 31, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2017 – February 28, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
January 1, 2017 – January 31, 2017
Resolved
Sample Siting Plan Errors (RTCR)
—
Revised Total Coliform Rule
April 1, 2016
Unaddressed
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2014 – December 31, 2014
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
Glyphosate
July 1, 2013 – September 30, 2013
Resolved
Monitoring, Regular
—
Endothall
July 1, 2013 – September 30, 2013
Resolved
Monitoring, Regular
—
Diquat
July 1, 2013 – September 30, 2013
Resolved
Monitoring, Regular
—
2,3,7,8-TCDD
July 1, 2013 – September 30, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2012 – December 31, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2012 – November 30, 2012
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 2012 – February 29, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
1,2-DIBROMO-3-CHLOROPROPANE
October 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2008 – December 31, 2010
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2005 – October 31, 2005
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2004 – August 26, 2004
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
August 1, 2004 – August 30, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2003 – September 30, 2003
Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yet

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2021 – December 31, 2021	Monitoring, Regular	Fluoride	—	Resolved
January 1, 2020 – December 31, 2020	Monitoring, Routine (IDSE)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2020 – December 31, 2020	Monitoring, Regular	Fluoride	—	Resolved
January 1, 2020 – December 31, 2020	Monitoring, Routine (IDSE)	TTHM	—	Resolved
April 1, 2017 – April 30, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
March 1, 2017 – March 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
February 1, 2017 – February 28, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2017 – January 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2016	Sample Siting Plan Errors (RTCR)	Revised Total Coliform Rule	—	Unaddressed
January 1, 2014 – December 31, 2014	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2013 – September 30, 2013	Monitoring, Regular	Glyphosate	—	Resolved
July 1, 2013 – September 30, 2013	Monitoring, Regular	Endothall	—	Resolved
July 1, 2013 – September 30, 2013	Monitoring, Regular	Diquat	—	Resolved
July 1, 2013 – September 30, 2013	Monitoring, Regular	2,3,7,8-TCDD	—	Resolved
December 1, 2012 – December 31, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 2012 – November 30, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
February 1, 2012 – February 29, 2012	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
October 1, 2010 – December 31, 2010	Maximum Contaminant Level Violation, Average	1,2-DIBROMO-3-CHLOROPROPANE	Health-based	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
October 1, 2005 – October 31, 2005	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2004 – August 26, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2004 – August 30, 2004	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 2003 – September 30, 2003	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yet

Enforcement actions

September 30, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
April 29, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
April 29, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
August 28, 2024State Formal Notice of Violation issued1 linked violation
February 23, 2022State Compliance achieved1 linked violation
February 23, 2022State Compliance achieved1 linked violation
July 20, 2021State Compliance achieved1 linked violation
July 20, 2021State Compliance achieved1 linked violation
March 31, 2021State Formal Notice of Violation issued1 linked violation
March 31, 2021State Formal Notice of Violation issued1 linked violation
March 31, 2021State Formal Notice of Violation issued1 linked violation
March 31, 2021State Public Notification issued1 linked violation
March 31, 2021State Public Notification issued1 linked violation
March 31, 2021State Public Notification issued1 linked violation
November 13, 2017State Compliance achieved1 linked violation
November 13, 2017State Compliance achieved1 linked violation
November 13, 2017State Compliance achieved1 linked violation
November 13, 2017State Compliance achieved1 linked violation
August 28, 2017State Formal Notice of Violation issued1 linked violation
August 28, 2017State Public Notification issued1 linked violation
June 23, 2017State Formal Notice of Violation issued1 linked violation
June 23, 2017State Formal Notice of Violation issued1 linked violation
June 23, 2017State Formal Notice of Violation issued1 linked violation
June 23, 2017State Public Notification issued1 linked violation
June 23, 2017State Public Notification issued1 linked violation
June 23, 2017State Public Notification issued1 linked violation
November 30, 2015State Compliance achieved1 linked violation
November 30, 2015State Compliance achieved1 linked violation
November 30, 2015State Compliance achieved1 linked violation
November 30, 2015State Compliance achieved1 linked violation
July 20, 2015State Compliance achieved1 linked violation
July 20, 2015State Compliance achieved1 linked violation
May 18, 2015State Compliance achieved1 linked violation
May 18, 2015State Compliance achieved1 linked violation
May 18, 2015State Compliance achieved1 linked violation
May 18, 2015State Compliance achieved1 linked violation
May 18, 2015State Compliance achieved1 linked violation
May 18, 2015State Compliance achieved1 linked violation
May 18, 2015State Compliance achieved1 linked violation
March 5, 2015State Formal Notice of Violation issued1 linked violation
March 5, 2015State Formal Notice of Violation issued1 linked violation
March 5, 2015State Public Notification requested1 linked violation
March 5, 2015State Public Notification requested1 linked violation
January 30, 2014State Public Notification issued1 linked violation
January 30, 2014State Public Notification issued1 linked violation
January 30, 2014State Public Notification issued1 linked violation
January 30, 2014State Formal Notice of Violation issued1 linked violation
January 30, 2014State Formal Notice of Violation issued1 linked violation
January 30, 2014State Formal Notice of Violation issued1 linked violation
January 30, 2014State Formal Notice of Violation issued1 linked violation
January 30, 2014State Public Notification issued1 linked violation
November 5, 2013State Compliance achieved1 linked violation
November 5, 2013State Compliance achieved1 linked violation
November 5, 2013State Compliance achieved1 linked violation
January 11, 2013State Compliance achieved1 linked violation
January 11, 2013State Formal Notice of Violation issued1 linked violation
December 11, 2012State Compliance achieved1 linked violation
November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
May 31, 2012State Formal Notice of Violation issued1 linked violation
May 31, 2012State Public Notification issued1 linked violation
March 5, 2012State Compliance achieved1 linked violation
February 21, 2012State Othergeneral compliance action — not tied to a specific violation on record
February 21, 2012State Othergeneral compliance action — not tied to a specific violation on record
February 21, 2012State Compliance achieved1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
October 21, 2011State Compliance achieved1 linked violation
July 19, 2011State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 19, 2011State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 22, 2010State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
March 22, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 8, 2008State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
May 16, 2008State Formal Notice of Violation issued1 linked violation
May 16, 2008State Formal Notice of Violation issued1 linked violation
May 16, 2008State Formal Notice of Violation issued1 linked violation
May 16, 2008State Formal Notice of Violation issued1 linked violation
June 6, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
November 16, 2005State Compliance achieved1 linked violation
August 30, 2004State Compliance achieved1 linked violation
August 26, 2004State Compliance achieved2 linked violations
August 26, 2004State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 5, 2000State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 5, 2000State Othergeneral compliance action — not tied to a specific violation on record

Common questions

Is Mariano Lake-Pinedale-Church Rock NTUA required to publish a Consumer Confidence Report?: Yes. Mariano Lake-Pinedale-Church Rock NTUA 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 Mariano Lake-Pinedale-Church Rock NTUA’s next Consumer Confidence Report due?: Mariano Lake-Pinedale-Church Rock NTUA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does Mariano Lake-Pinedale-Church Rock NTUA have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 1 item for Mariano Lake-Pinedale-Church Rock NTUA that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
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

Navajo Tribal Utility Authority

9287296277

Ft Defiance, AZ 86504