Fort Defiance, NN

Coal Mine Mesa NTUA Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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): NN0400207
System type: Community Water System
Population served: 393
Service connections: 115
Ownership: Native American tribal
Water source: groundwater (wells)

Violation history

Monitoring, Routine (IDSE)
—
TTHM
January 1, 2020 – December 31, 2020
Resolved
Monitoring, Routine (IDSE)
—
Total Haloacetic Acids (HAA5)
January 1, 2020 – December 31, 2020
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Chromium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Toluene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Styrene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
2,3,7,8-TCDD
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Diquat
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Endothall
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Simazine
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
LASSO
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2002 – September 30, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2002 – August 31, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2002 – July 31, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2002 – June 30, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 2002 – April 30, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2002 – February 28, 2002
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
Benzene
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2001 – December 31, 2001
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2001 – December 31, 2001
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2020 – December 31, 2020	Monitoring, Routine (IDSE)	TTHM	—	Resolved
January 1, 2020 – December 31, 2020	Monitoring, Routine (IDSE)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Chromium	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Toluene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Styrene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	2,3,7,8-TCDD	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Asbestos	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Diquat	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Endothall	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Simazine	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	LASSO	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Ethylbenzene	—	Resolved
September 1, 2002 – September 30, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
August 1, 2002 – August 31, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2002 – July 31, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 2002 – June 30, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 2002 – April 30, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
February 1, 2002 – February 28, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	Benzene	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

July 13, 2021State Compliance achieved1 linked violation
July 13, 2021State Compliance achieved1 linked violation
April 1, 2021State Formal Notice of Violation issued1 linked violation
April 1, 2021State Public Notification issued1 linked violation
April 1, 2021State Formal Notice of Violation issued1 linked violation
April 1, 2021State Public Notification issued1 linked violation
June 3, 2014State Compliance achieved1 linked violation
June 3, 2014State Compliance achieved1 linked violation
June 3, 2014State Compliance achieved1 linked violation
June 3, 2014State Compliance achieved1 linked violation
June 3, 2014State Compliance achieved1 linked violation
June 3, 2014State Compliance achieved1 linked violation
June 3, 2014State Compliance achieved1 linked violation
June 3, 2014State Compliance achieved1 linked violation
June 3, 2014State Compliance achieved1 linked violation
June 3, 2014State Compliance achievedgeneral compliance action — not tied to a specific violation on record
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
March 9, 2011State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
April 13, 2007State Compliance achieved10 linked violations
February 8, 2005State Compliance achieved45 linked violations
August 19, 2003State Compliance achievedgeneral compliance action — not tied to a specific violation on record
January 17, 2003State Compliance achieved1 linked violation
April 9, 2002State Compliance achieved27 linked violations

Contact

Navajo Tribal Utility Authority

9287296239

Fort Defiance, AZ 86504-0170