Ft Defiance, NN
Coyote Canyon-Bass Lake NTUA Water System
Consumer Confidence Report status
Coyote Canyon-Bass Lake 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 Coyote Canyon-Bass Lake 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)
- NN3500274
- System type
- Community Water System
- Population served
- 622
- Service connections
- 182
- Ownership
- Native American tribal
- Water source
- groundwater (wells)
Coyote Canyon-Bass Lake NTUA is one of 77 community water systems in Navajo Nation in the 501 to 3,300 people size category, serving 622 people from groundwater.
As of August 1, 2026, its federal record holds 50 entries between 2004 and 2020, all of which EPA lists as closed. Nothing has been added since 2020.
Of the 50, 49 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 Stage 2 Disinfectants and Disinfection Byproducts Rule, and the Total Coliform Rules.
Violation history
Monitoring, Routine (IDSE)
—Total Haloacetic Acids (HAA5)
January 1, 2020 – December 31, 2020
ResolvedMonitoring, Routine (IDSE)
—TTHM
January 1, 2020 – December 31, 2020
ResolvedSample Siting Plan Errors (RTCR)
—Revised Total Coliform Rule
April 1, 2016 – September 30, 2025
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 and Reporting (DBP)
—TTHM
January 1, 2010 – December 31, 2010
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
January 1, 2010 – 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
—Tetrachloroethylene
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
—1,2-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
—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
—Vinyl chloride
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—Benzene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—Toluene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—Styrene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 2004 – October 4, 2004
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 2004 – October 4, 2004
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2020 – December 31, 2020 | Monitoring, Routine (IDSE) | Total Haloacetic Acids (HAA5) | — | Resolved |
| January 1, 2020 – December 31, 2020 | Monitoring, Routine (IDSE) | TTHM | — | Resolved |
| April 1, 2016 – September 30, 2025 | Sample Siting Plan Errors (RTCR) | Revised Total Coliform Rule | — | 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, 2010 – December 31, 2010 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| January 1, 2010 – December 31, 2010 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | 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 | Tetrachloroethylene | — | 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 | 1,2-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 | 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, 2004 – October 4, 2004 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 2004 – October 4, 2004 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- September 30, 2025State Compliance achieved1 linked violation
- February 18, 2025State Compliance achieved1 linked violation
- August 28, 2024State Formal Notice of Violation issued1 linked violation
- July 7, 2021State Compliance achieved1 linked violation
- July 7, 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 Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- March 31, 2021State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- March 31, 2021State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- March 31, 2021State Formal Notice of Violation issued1 linked violation
- March 31, 2021State Public Notification issued1 linked violation
- March 31, 2021State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
- March 31, 2021State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
- March 31, 2021State Public Notification 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
- July 17, 2013State Compliance achieved1 linked violation
- July 17, 2013State Compliance achieved1 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
- November 3, 2011State Formal Notice of Violation issued1 linked violation
- November 3, 2011State Formal Notice of Violation issued1 linked violation
- November 3, 2011State Public Notification issued1 linked violation
- November 3, 2011State Public Notification issued1 linked violation
- October 4, 2004State Compliance achieved21 linked violations
Common questions
Is Coyote Canyon-Bass Lake NTUA required to publish a Consumer Confidence Report?
- Yes. Coyote Canyon-Bass Lake 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 Coyote Canyon-Bass Lake NTUA’s next Consumer Confidence Report due?
- Coyote Canyon-Bass Lake NTUA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does Coyote Canyon-Bass Lake NTUA have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for Coyote Canyon-Bass Lake 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