Ft Defiance, NN
Aneth 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)
- NN4900220
- System type
- Community Water System
- Population served
- 1,481
- Service connections
- 433
- Ownership
- Native American tribal
- Water source
- groundwater (wells)
Violation history
Monitoring, Regular
—Arsenic
October 1, 2024 – December 31, 2024
ArchivedMonitoring, Regular
—Arsenic
January 1, 2024 – March 31, 2024
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2024 – March 31, 2024
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2023 – December 31, 2023
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2023 – September 30, 2023
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2023 – June 30, 2023
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2023 – March 31, 2023
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2022 – December 31, 2022
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2022 – September 30, 2022
ArchivedPublic Notification Violation for NPDWR Violation
—Public Notice
April 1, 2022 – April 7, 2022
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2022 – June 30, 2022
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2022 – March 31, 2022
ArchivedMonitoring, Regular
—Arsenic
January 1, 2022 – March 31, 2022
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2021 – December 31, 2021
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2021 – September 30, 2021
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2021 – June 30, 2021
ArchivedPublic Notification Violation for NPDWR Violation
—Public Notice
April 1, 2021 – July 14, 2021
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2021 – March 31, 2021
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2020 – December 31, 2020
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2020 – September 30, 2020
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2020 – June 30, 2020
ArchivedPublic Notification Violation for NPDWR Violation
—Public Notice
April 1, 2020 – April 3, 2020
ResolvedMonitoring, Routine (IDSE)
—Total Haloacetic Acids (HAA5)
January 1, 2020 – December 31, 2020
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2020 – March 31, 2020
ArchivedMonitoring, Routine (IDSE)
—TTHM
January 1, 2020 – December 31, 2020
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2019 – December 31, 2019
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2019 – September 30, 2019
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2019 – June 30, 2019
ArchivedMonitoring, Regular
—Arsenic
January 1, 2019 – February 12, 2019
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2019 – March 31, 2019
ArchivedPublic Notification Violation for NPDWR Violation
—Public Notice
October 1, 2018 – October 26, 2018
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2018 – December 31, 2018
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2018 – September 30, 2018
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2018 – June 30, 2018
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2018 – March 31, 2018
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2017 – December 31, 2017
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2017 – September 30, 2017
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2017 – June 30, 2017
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2017 – March 31, 2017
ArchivedPublic Notification Violation for NPDWR Violation
—Public Notice
January 1, 2017 – May 9, 2017
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2016 – December 31, 2016
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2016 – September 30, 2016
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2016 – June 30, 2016
ArchivedPublic Notification Violation for NPDWR Violation
—Public Notice
April 1, 2016 – October 8, 2016
ResolvedSample Siting Plan Errors (RTCR)
—Revised Total Coliform Rule
April 1, 2016 – March 7, 2025
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2016 – March 31, 2016
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2015 – December 31, 2015
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2015 – September 30, 2015
ArchivedPublic Notification Violation for NPDWR Violation
—Public Notice
July 1, 2015 – March 17, 2016
ResolvedMonitoring, Regular
—Arsenic
April 1, 2015 – May 9, 2013
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2015 – March 31, 2015
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2014 – December 31, 2014
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2014 – August 5, 2014
ResolvedMonitoring, Regular
—Arsenic
July 1, 2014 – August 28, 2014
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2014 – June 30, 2014
ResolvedMonitoring, Regular
—Arsenic
April 1, 2014 – June 30, 2014
ResolvedMonitoring, Regular
—Arsenic
January 1, 2014 – March 31, 2014
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2014 – March 31, 2014
ArchivedFailure Submit IDSE/Subpart V Plan Rpt
—Stage 2 Disinfectants and Disinfection Byproducts Rule
October 1, 2013 – February 23, 2023
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
October 1, 2013 – August 5, 2014
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2013 – December 31, 2013
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2013 – September 30, 2013
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2013 – June 30, 2013
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2013 – March 31, 2013
ArchivedMonitoring, Routine Major (TCR)
—Coliform (TCR)
December 1, 2012 – December 31, 2012
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
November 1, 2012 – November 30, 2012
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
October 1, 2012 – December 31, 2012
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2012 – September 30, 2012
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2012 – June 30, 2012
ArchivedMonitoring, Regular
—Arsenic
April 1, 2012 – June 30, 2012
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2012 – March 31, 2012
ArchivedMaximum Contaminant Level Violation, Average
Health-basedCombined Uranium
October 1, 2010 – December 31, 2010
ResolvedMonitoring, Regular
—Nitrite
January 1, 2010 – December 31, 2010
ResolvedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Vinyl chloride
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Benzene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Toluene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Styrene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Combined Uranium
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Combined Radium (-226 and -228)
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Methoxychlor
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Hexachlorocyclopentadiene
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—BHC-GAMMA
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Endrin
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Dinoseb
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Picloram
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) phthalate
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Simazine
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—OXAMYL
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) adipate
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Aldicarb sulfoxide
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Aldicarb sulfone
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Carbofuran
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Aldicarb
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Atrazine
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—LASSO
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—2,3,7,8-TCDD
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Heptachlor
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Heptachlor epoxide
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—2,4-D
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—2,4,5-TP
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—HEXACHLOROBENZENE
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Benzo(a)pyrene
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Pentachlorophenol
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Glyphosate
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Endothall
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Total Polychlorinated Biphenyls (PCB)
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—ETHYLENE DIBROMIDE
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Diquat
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Chlordane
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Dalapon
January 1, 2004 – September 7, 2004
ResolvedMonitoring, Regular
—Toxaphene
January 1, 2004 – September 7, 2004
Resolved
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Arsenic | — | Archived |
| January 1, 2024 – March 31, 2024 | Monitoring, Regular | Arsenic | — | Resolved |
| January 1, 2024 – March 31, 2024 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| October 1, 2023 – December 31, 2023 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2023 – September 30, 2023 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2023 – June 30, 2023 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| January 1, 2023 – March 31, 2023 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| October 1, 2022 – December 31, 2022 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2022 – September 30, 2022 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2022 – April 7, 2022 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| April 1, 2022 – June 30, 2022 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| January 1, 2022 – March 31, 2022 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| January 1, 2022 – March 31, 2022 | Monitoring, Regular | Arsenic | — | Resolved |
| October 1, 2021 – December 31, 2021 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2021 – September 30, 2021 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2021 – June 30, 2021 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2021 – July 14, 2021 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| January 1, 2021 – March 31, 2021 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| October 1, 2020 – December 31, 2020 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2020 – September 30, 2020 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2020 – June 30, 2020 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2020 – April 3, 2020 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| January 1, 2020 – December 31, 2020 | Monitoring, Routine (IDSE) | Total Haloacetic Acids (HAA5) | — | Resolved |
| January 1, 2020 – March 31, 2020 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| January 1, 2020 – December 31, 2020 | Monitoring, Routine (IDSE) | TTHM | — | Resolved |
| October 1, 2019 – December 31, 2019 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2019 – September 30, 2019 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2019 – June 30, 2019 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| January 1, 2019 – February 12, 2019 | Monitoring, Regular | Arsenic | — | Resolved |
| January 1, 2019 – March 31, 2019 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| October 1, 2018 – October 26, 2018 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| October 1, 2018 – December 31, 2018 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2018 – September 30, 2018 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2018 – June 30, 2018 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| January 1, 2018 – March 31, 2018 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| October 1, 2017 – December 31, 2017 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2017 – September 30, 2017 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2017 – June 30, 2017 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| January 1, 2017 – March 31, 2017 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| January 1, 2017 – May 9, 2017 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| October 1, 2016 – December 31, 2016 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2016 – September 30, 2016 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2016 – June 30, 2016 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2016 – October 8, 2016 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| April 1, 2016 – March 7, 2025 | Sample Siting Plan Errors (RTCR) | Revised Total Coliform Rule | — | Resolved |
| January 1, 2016 – March 31, 2016 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| October 1, 2015 – December 31, 2015 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2015 – September 30, 2015 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2015 – March 17, 2016 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| April 1, 2015 – May 9, 2013 | Monitoring, Regular | Arsenic | — | Resolved |
| January 1, 2015 – March 31, 2015 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| October 1, 2014 – December 31, 2014 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2014 – August 5, 2014 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| July 1, 2014 – August 28, 2014 | Monitoring, Regular | Arsenic | — | Resolved |
| April 1, 2014 – June 30, 2014 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| April 1, 2014 – June 30, 2014 | Monitoring, Regular | Arsenic | — | Resolved |
| January 1, 2014 – March 31, 2014 | Monitoring, Regular | Arsenic | — | Resolved |
| January 1, 2014 – March 31, 2014 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| October 1, 2013 – February 23, 2023 | Failure Submit IDSE/Subpart V Plan Rpt | Stage 2 Disinfectants and Disinfection Byproducts Rule | — | Resolved |
| October 1, 2013 – August 5, 2014 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| October 1, 2013 – December 31, 2013 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2013 – September 30, 2013 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| April 1, 2013 – June 30, 2013 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| January 1, 2013 – March 31, 2013 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| 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 |
| October 1, 2012 – December 31, 2012 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| July 1, 2012 – September 30, 2012 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| April 1, 2012 – June 30, 2012 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| April 1, 2012 – June 30, 2012 | Monitoring, Regular | Arsenic | — | Resolved |
| January 1, 2012 – March 31, 2012 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Archived |
| October 1, 2010 – December 31, 2010 | Maximum Contaminant Level Violation, Average | Combined Uranium | Health-based | Resolved |
| January 1, 2010 – December 31, 2010 | Monitoring, Regular | Nitrite | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | 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 |
| 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, 2010 | Monitoring, Regular | 1,1,2-Trichloroethane | — | 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 | Combined Uranium | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | Combined Radium (-226 and -228) | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Methoxychlor | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | BHC-GAMMA | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Endrin | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Dinoseb | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Picloram | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Di(2-ethylhexyl) phthalate | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Simazine | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | OXAMYL | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Di(2-ethylhexyl) adipate | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Aldicarb sulfoxide | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Aldicarb sulfone | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Carbofuran | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Aldicarb | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Atrazine | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | LASSO | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | 2,3,7,8-TCDD | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Heptachlor | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Heptachlor epoxide | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | 2,4-D | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | HEXACHLOROBENZENE | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Benzo(a)pyrene | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Pentachlorophenol | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Glyphosate | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Endothall | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Total Polychlorinated Biphenyls (PCB) | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | 1,2-DIBROMO-3-CHLOROPROPANE | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | ETHYLENE DIBROMIDE | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Diquat | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Chlordane | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Dalapon | — | Resolved |
| January 1, 2004 – September 7, 2004 | Monitoring, Regular | Toxaphene | — | Resolved |
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
Enforcement actions
- 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 issued1 linked violation
- April 30, 2025State Formal Notice of Violation issued1 linked violation
- April 30, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- March 7, 2025State Compliance achieved1 linked violation
- August 28, 2024State Formal Notice of Violation issued1 linked violation
- May 13, 2024State Compliance achieved1 linked violation
- February 23, 2023State Compliance achieved1 linked violation
- May 9, 2022State Compliance achieved1 linked violation
- April 7, 2022State Compliance achieved1 linked violation
- July 28, 2021State Compliance achieved1 linked violation
- July 28, 2021State Compliance achieved1 linked violation
- July 14, 2021State Compliance achieved1 linked violation
- March 31, 2021State Public Notification 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 Formal Notice of Violation issued1 linked violation
- April 3, 2020State Compliance achieved1 linked violation
- February 12, 2019State Compliance achieved1 linked violation
- October 26, 2018State Compliance achieved1 linked violation
- December 19, 2017State Public Notification received1 linked violation
- August 28, 2017State Formal Notice of Violation issued1 linked violation
- August 28, 2017State Public Notification issued1 linked violation
- May 9, 2017State Compliance achieved1 linked violation
- February 27, 2017State Formal Notice of Violation issued1 linked violation
- December 9, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- October 8, 2016State Compliance achieved1 linked violation
- March 17, 2016State Compliance achieved1 linked violation
- March 8, 2016State Formal Notice of Violation issued1 linked violation
- August 28, 2014State Compliance achieved1 linked violation
- August 28, 2014State Compliance achieved1 linked violation
- August 28, 2014State Compliance achieved1 linked violation
- August 28, 2014State Compliance achieved1 linked violation
- August 28, 2014State Compliance achieved1 linked violation
- August 28, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- August 5, 2014State Compliance achieved1 linked violation
- April 21, 2014State Compliance achieved1 linked violation
- January 28, 2014State Public Notification received1 linked violation
- January 28, 2014State Public Notification received1 linked violation
- January 28, 2014State Public Notification received1 linked violation
- January 28, 2014State Public Notification received1 linked violation
- January 28, 2014State Public Notification received1 linked violation
- January 28, 2014State Public Notification received1 linked violation
- January 28, 2014State Public Notification received1 linked violation
- October 25, 2013State Bilateral Compliance Agreement signed1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- May 9, 2013State Compliance achieved1 linked violation
- March 12, 2013State Formal Notice of Violation issued1 linked violation
- January 11, 2013State Compliance achieved1 linked violation
- December 19, 2012State Formal Notice of Violation issued1 linked violation
- December 19, 2012State Formal Notice of Violation issued1 linked violation
- December 19, 2012State Formal Notice of Violation issued1 linked violation
- December 11, 2012State Compliance achieved1 linked violation
- November 20, 2012State Formal Notice of Violation issued1 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
- September 25, 2012State Public Notification issued1 linked violation
- September 25, 2012State Public Notification issued1 linked violation
- September 25, 2012State Formal Notice of Violation issued1 linked violation
- September 25, 2012State Formal Notice of Violation issued1 linked violation
- June 6, 2012State Formal Notice of Violation issued1 linked violation
- June 6, 2012State Public Notification issued1 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 15, 2012State Compliance achieved1 linked violation
- October 25, 2011State Compliance achieved1 linked violation
- October 25, 2011State Compliance achieved1 linked violation
- October 25, 2011State Compliance achieved1 linked violation
- October 25, 2011State Compliance achieved1 linked violation
- October 21, 2011State Compliance achieved1 linked violation
- May 5, 2011State Compliance achieved1 linked violation
- January 25, 2011State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- January 25, 2011State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- September 7, 2004State Compliance achieved33 linked violations
Contact
Navajo Tribal Utility Authority
9287296277
Ft Defiance, AZ 86504