Is Inscription House-Navajo Mountain NTUA required to publish a Consumer Confidence Report?

Yes. Inscription House-Navajo Mountain 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 Inscription House-Navajo Mountain NTUA’s next Consumer Confidence Report due?

Inscription House-Navajo Mountain 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

Inscription House-Navajo Mountain NTUA Water System

Consumer Confidence Report status

Inscription House-Navajo Mountain 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 2 items for Inscription House-Navajo Mountain NTUA that are 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): NN0400283
System type: Community Water System
Population served: 1,368
Service connections: 400
Ownership: Native American tribal
Water source: groundwater (wells)

Inscription House-Navajo Mountain NTUA is one of 77 community water systems in Navajo Nation in the 501 to 3,300 people size category, serving 1,368 people from groundwater.

As of August 1, 2026, its federal record holds 8 entries between 1996 and 2016, of which 2 remain open; none are health-based.

Of the 8, 6 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, inorganic chemicals, and the Stage 2 Disinfectants and Disinfection Byproducts Rule.

Violation history

Sample Siting Plan Errors (RTCR)
—
Revised Total Coliform Rule
April 1, 2016
Unaddressed
Failure Submit IDSE/Subpart V Plan Rpt
—
Stage 2 Disinfectants and Disinfection Byproducts Rule
October 1, 2013
Unaddressed
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2013 – May 31, 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, Regular
—
Nitrite
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
July 31, 1996 – August 30, 1996
Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
April 1, 2016	Sample Siting Plan Errors (RTCR)	Revised Total Coliform Rule	—	Unaddressed
October 1, 2013	Failure Submit IDSE/Subpart V Plan Rpt	Stage 2 Disinfectants and Disinfection Byproducts Rule	—	Unaddressed
May 1, 2013 – May 31, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	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
January 1, 2010 – December 31, 2010	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Nitrate	—	Resolved
July 31, 1996 – August 30, 1996	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

August 28, 2024State Formal Notice of Violation issued1 linked violation
December 13, 2018State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 1, 2017State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
August 29, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 29, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 29, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 7, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 27, 2017State Formal Notice of Violation issued1 linked violation
October 3, 2013State Formal Notice of Violation issued1 linked violation
June 27, 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
October 21, 2011State Compliance achieved1 linked violation
March 6, 2006State Compliance achieved1 linked violation
December 5, 2000State Compliance achieved1 linked violation

Common questions

Is Inscription House-Navajo Mountain NTUA required to publish a Consumer Confidence Report?: Yes. Inscription House-Navajo Mountain 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 Inscription House-Navajo Mountain NTUA’s next Consumer Confidence Report due?: Inscription House-Navajo Mountain NTUA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does Inscription House-Navajo Mountain NTUA have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 2 items for Inscription House-Navajo Mountain NTUA that are 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