Is Dennehotso NTUA required to publish a Consumer Confidence Report?

Yes. Dennehotso 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 Dennehotso NTUA’s next Consumer Confidence Report due?

Dennehotso 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

Dennehotso NTUA Water System

Consumer Confidence Report status

Dennehotso 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 no open violations for Dennehotso NTUA.

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): NN0400296
System type: Community Water System
Population served: 1,040
Service connections: 304
Ownership: Native American tribal
Water source: groundwater (wells)

Dennehotso NTUA is one of 77 community water systems in Navajo Nation in the 501 to 3,300 people size category, serving 1,040 people from groundwater.

As of August 1, 2026, its federal record holds 33 entries between 2005 and 2017, all of which EPA lists as closed. Nothing has been added since 2017.

All 33 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 volatile organic chemicals, the Total Coliform Rules, and the Stage 2 Disinfectants and Disinfection Byproducts Rule.

Violation history

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 (IDSE)
—
Total Haloacetic Acids (HAA5)
January 1, 2017 – December 31, 2017
Resolved
Monitoring, Routine (IDSE)
—
TTHM
January 1, 2017 – December 31, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
January 1, 2017 – January 31, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2016 – June 30, 2016
Resolved
Failure Submit IDSE/Subpart V Plan Rpt
—
Stage 2 Disinfectants and Disinfection Byproducts Rule
October 1, 2013 – November 28, 2018
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
—
1,1,1-Trichloroethane
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
Benzene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
Toluene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
Styrene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2005 – December 31, 2010
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
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 – December 31, 2017	Monitoring, Routine (IDSE)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2017 – December 31, 2017	Monitoring, Routine (IDSE)	TTHM	—	Resolved
January 1, 2017 – January 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
June 1, 2016 – June 30, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2013 – November 28, 2018	Failure Submit IDSE/Subpart V Plan Rpt	Stage 2 Disinfectants and Disinfection Byproducts Rule	—	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, 2010	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Benzene	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Toluene	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Styrene	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	1,2-Dichloroethane	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

November 28, 2018State Compliance achieved1 linked violation
August 27, 2018State Compliance achieved1 linked violation
August 27, 2018State Compliance achieved1 linked violation
March 5, 2018State Formal Notice of Violation issued1 linked violation
March 5, 2018State Formal Notice of Violation issued1 linked violation
March 5, 2018State Public Notification issued1 linked violation
March 5, 2018State 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 25, 2017State Public Notification issued1 linked violation
August 25, 2017State Public Notification issued1 linked violation
August 25, 2017State Formal Notice of Violation issued1 linked violation
August 25, 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
June 23, 2017State Formal Notice of Violation issued1 linked violation
August 31, 2016State Formal Notice of Violation issued1 linked violation
July 14, 2016State Compliance achieved1 linked violation
January 11, 2013State Formal Notice of Violation issued1 linked violation
January 11, 2013State Compliance achieved1 linked violation
December 11, 2012State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
October 17, 2011State Compliance achieved1 linked violation
February 25, 2008State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
March 6, 2006State Compliance achieved1 linked violation

Common questions

Is Dennehotso NTUA required to publish a Consumer Confidence Report?: Yes. Dennehotso 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 Dennehotso NTUA’s next Consumer Confidence Report due?: Dennehotso NTUA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does Dennehotso NTUA have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for Dennehotso NTUA.
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