Ft Defiance, NN
Mexican Springs West Rural 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)
- NN3500267
- System type
- Community Water System
- Population served
- 257
- Service connections
- 75
- Ownership
- Native American tribal
- Water source
- groundwater (wells)
Violation history
Sample Siting Plan Errors (RTCR)
—Revised Total Coliform Rule
April 1, 2016 – September 30, 2025
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
September 1, 2015 – September 30, 2015
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
September 1, 2015 – July 1, 2016
ResolvedFailure Submit IDSE/Subpart V Plan Rpt
—Stage 2 Disinfectants and Disinfection Byproducts Rule
October 1, 2013 – February 18, 2025
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
—Nitrate
January 1, 2011 – June 13, 2010
ResolvedMonitoring, Regular
—Nitrite
January 1, 2011 – June 13, 2010
ResolvedMonitoring, Regular
—Nitrite
January 1, 2010 – 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
—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
—Gross Alpha, Excl. Radon and U
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,2-Dichloropropane
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, Routine Major (TCR)
—Coliform (TCR)
December 1, 2001 – December 17, 2001
ResolvedMaximum Contaminant Level Violation, Single Sample
Health-basedThallium, Total
November 2, 1999 – November 1, 2000
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| April 1, 2016 – September 30, 2025 | Sample Siting Plan Errors (RTCR) | Revised Total Coliform Rule | — | Resolved |
| September 1, 2015 – September 30, 2015 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
| September 1, 2015 – July 1, 2016 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| October 1, 2013 – February 18, 2025 | 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, 2011 – June 13, 2010 | Monitoring, Regular | Nitrate | — | Resolved |
| January 1, 2011 – June 13, 2010 | Monitoring, Regular | Nitrite | — | Resolved |
| January 1, 2010 – December 31, 2010 | Monitoring, Regular | Nitrite | — | 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 | 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 | Gross Alpha, Excl. Radon and U | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | 1,2-Dichloropropane | — | 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 |
| December 1, 2001 – December 17, 2001 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| November 2, 1999 – November 1, 2000 | Maximum Contaminant Level Violation, Single Sample | Thallium, Total | Health-based | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- September 30, 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
- February 18, 2025State Compliance achieved1 linked violation
- August 28, 2024State Formal Notice of Violation issued1 linked violation
- August 28, 2017State Public Notification issued1 linked violation
- August 28, 2017State Formal Notice of Violation issued1 linked violation
- July 1, 2016State Compliance achieved1 linked violation
- July 1, 2016State Compliance achieved1 linked violation
- March 8, 2016State Formal Notice of Violation issued1 linked violation
- December 2, 2015State Formal Notice of Violation issued1 linked violation
- December 2, 2015State Public Notification 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 29, 2012State Formal Notice of Violation issued1 linked violation
- February 29, 2012State Public Notification issued1 linked violation
- February 29, 2012State Formal Notice of Violation issued1 linked violation
- February 29, 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
- November 17, 2011State Compliance achieved1 linked violation
- October 21, 2011State Compliance achieved1 linked violation
- January 25, 2011State Compliance achieved1 linked violation
- June 13, 2010State Compliance achieved1 linked violation
- June 13, 2010State Compliance achieved1 linked violation
- March 20, 2007State Formal Notice of Violation issued1 linked violation
- December 17, 2001State Compliance achieved1 linked violation
- December 5, 2000State Compliance achievedgeneral compliance action — not tied to a specific violation on record
Contact
Navajo Tribal Utility Authority
9287296277
Ft Defiance, AZ 86504