Ft Defiance, NN
Mittenrock NTUA Water System
Consumer Confidence Report status
Mittenrock 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 Mittenrock 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)
- NN3503057
- System type
- Community Water System
- Population served
- 352
- Service connections
- 103
- Ownership
- Native American tribal
- Water source
- groundwater (wells)
Mittenrock NTUA is one of 125 community water systems in Navajo Nation in the 500 or fewer people size category, serving 352 people from groundwater.
As of August 1, 2026, its federal record holds 67 entries between 2008 and 2017, all of which EPA lists as closed. Nothing has been added since 2017.
Of the 67, 58 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 synthetic organic chemicals, volatile organic chemicals, and inorganic chemicals.
Violation history
Maximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2017 – February 6, 2017
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
January 1, 2017 – May 19, 2017
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2016 – December 31, 2016
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2015 – December 31, 2015
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
October 1, 2015 – July 1, 2016
ResolvedMonitoring, Regular
—Arsenic
July 1, 2014 – September 30, 2014
ResolvedMonitoring, Regular
—Arsenic
January 1, 2014 – March 31, 2014
ResolvedFailure Submit IDSE/Subpart V Plan Rpt
—Stage 2 Disinfectants and Disinfection Byproducts Rule
October 1, 2013 – October 8, 2025
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2013 – June 30, 2013
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2013 – March 31, 2013
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
December 1, 2012 – December 31, 2012
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
November 1, 2012 – November 30, 2012
ResolvedMonitoring, Regular
—Fluoride
January 1, 2011 – December 31, 2013
ResolvedMaximum Contaminant Level Violation, Average
Health-basedFluoride
October 1, 2010 – December 31, 2010
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2010 – December 31, 2010
ResolvedMonitoring, Regular
—Nitrite
January 1, 2010 – December 31, 2010
ResolvedMonitoring, Regular
—Carbofuran
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Atrazine
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—LASSO
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—2,3,7,8-TCDD
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Heptachlor
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Heptachlor epoxide
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—2,4-D
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—2,4,5-TP
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—HEXACHLOROBENZENE
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Benzo(a)pyrene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Pentachlorophenol
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Total Polychlorinated Biphenyls (PCB)
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—ETHYLENE DIBROMIDE
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Chlordane
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Vinyl chloride
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Toluene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Styrene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Benzene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Endrin
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—BHC-GAMMA
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Methoxychlor
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Toxaphene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Dalapon
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Diquat
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Endothall
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Glyphosate
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) adipate
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—OXAMYL
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Simazine
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) phthalate
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Picloram
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Dinoseb
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Hexachlorocyclopentadiene
January 1, 2008 – December 31, 2010
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2017 – February 6, 2017 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| January 1, 2017 – May 19, 2017 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| October 1, 2016 – December 31, 2016 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| October 1, 2015 – December 31, 2015 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| October 1, 2015 – July 1, 2016 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| July 1, 2014 – September 30, 2014 | Monitoring, Regular | Arsenic | — | Resolved |
| January 1, 2014 – March 31, 2014 | Monitoring, Regular | Arsenic | — | Resolved |
| October 1, 2013 – October 8, 2025 | Failure Submit IDSE/Subpart V Plan Rpt | Stage 2 Disinfectants and Disinfection Byproducts Rule | — | Resolved |
| April 1, 2013 – June 30, 2013 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| January 1, 2013 – March 31, 2013 | Maximum Contaminant Level Violation, Average | Arsenic | 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, 2011 – December 31, 2013 | Monitoring, Regular | Fluoride | — | Resolved |
| October 1, 2010 – December 31, 2010 | Maximum Contaminant Level Violation, Average | Fluoride | Health-based | Resolved |
| October 1, 2010 – December 31, 2010 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| January 1, 2010 – December 31, 2010 | Monitoring, Regular | Nitrite | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Carbofuran | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Atrazine | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | LASSO | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | 2,3,7,8-TCDD | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Heptachlor | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Heptachlor epoxide | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | 2,4-D | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | HEXACHLOROBENZENE | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Benzo(a)pyrene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Pentachlorophenol | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Total Polychlorinated Biphenyls (PCB) | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | 1,2-DIBROMO-3-CHLOROPROPANE | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | ETHYLENE DIBROMIDE | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Chlordane | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Endrin | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | BHC-GAMMA | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Methoxychlor | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Toxaphene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Dalapon | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Diquat | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Endothall | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Glyphosate | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Di(2-ethylhexyl) adipate | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | OXAMYL | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Simazine | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Di(2-ethylhexyl) phthalate | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Picloram | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Dinoseb | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- October 8, 2025State Compliance achieved1 linked violation
- April 30, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- April 30, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- August 28, 2017State Formal Notice of Violation issued1 linked violation
- August 28, 2017State Public Notification issued1 linked violation
- May 19, 2017State Compliance achieved1 linked violation
- February 27, 2017State Formal Notice of Violation issued1 linked violation
- February 6, 2017State Compliance achieved1 linked violation
- February 6, 2017State Compliance achieved1 linked violation
- August 31, 2016State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- August 31, 2016State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
- August 1, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- July 1, 2016State Compliance achieved1 linked violation
- May 31, 2016State Public Notification issued1 linked violation
- March 14, 2016State Compliance achieved1 linked violation
- March 8, 2016State Public Notification issued1 linked violation
- March 8, 2016State Formal Notice of Violation issued1 linked violation
- June 15, 2015State Compliance achieved1 linked violation
- January 9, 2015State Compliance achieved1 linked violation
- November 17, 2014State Formal Notice of Violation issued1 linked violation
- November 17, 2014State Public Notification issued1 linked violation
- October 1, 2014State Public Notification received1 linked violation
- October 1, 2014State Public Notification received1 linked violation
- August 28, 2014State Compliance achieved1 linked violation
- August 28, 2014State Compliance achieved1 linked violation
- July 29, 2014State Public Notification requested1 linked violation
- July 29, 2014State Formal Notice of Violation issued1 linked violation
- May 8, 2014State Compliance achieved1 linked violation
- April 14, 2014State Formal Notice of Violation issued1 linked violation
- April 14, 2014State Public Notification issued1 linked violation
- July 17, 2013State Public Notification issued1 linked violation
- July 17, 2013State Formal Notice of Violation issued1 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
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- October 21, 2011State Compliance achieved1 linked violation
- May 10, 2011State Compliance achieved1 linked violation
- May 10, 2011State Compliance achieved1 linked violation
- March 23, 2007State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
Common questions
Is Mittenrock NTUA required to publish a Consumer Confidence Report?
- Yes. Mittenrock 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 Mittenrock NTUA’s next Consumer Confidence Report due?
- Mittenrock NTUA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does Mittenrock NTUA have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for Mittenrock 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