Chinle, NN

Chinle USD 24 Administration Center Water System

Current status

4 items on record are open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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): NN0403060
System type: Community Water System
Population served: 220
Service connections: 57
Ownership: local government
Water source: groundwater (wells)

Violation history

Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
August 1, 2025
Unaddressed
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2025 – March 31, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2025 – February 28, 2025
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
December 1, 2024 – February 14, 2025
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2024
Unaddressed
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
April 1, 2024 – August 9, 2024
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2024 – December 31, 2024
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2024 – December 31, 2024
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
October 1, 2023 – November 27, 2023
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2023 – July 31, 2023
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 1, 2023
Unaddressed
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023
Unaddressed
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
September 1, 2022 – October 27, 2022
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2022 – March 23, 2023
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
May 1, 2022 – July 19, 2022
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
March 1, 2022 – April 27, 2022
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2021 – December 31, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
August 1, 2021 – August 31, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2021 – March 23, 2023
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
June 1, 2021 – July 21, 2021
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2021 – December 31, 2021
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2021 – December 31, 2021
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
August 1, 2020 – September 16, 2020
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – March 23, 2023
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
July 1, 2020 – September 16, 2020
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
June 1, 2020 – August 6, 2020
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
May 1, 2020 – August 6, 2020
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
April 1, 2020 – August 6, 2020
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
March 1, 2020 – May 27, 2020
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
February 1, 2020 – May 27, 2020
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
January 1, 2020 – February 24, 2020
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
December 1, 2019 – February 24, 2020
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
November 1, 2019 – February 24, 2020
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
October 1, 2019 – February 24, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2019 – September 30, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2019 – July 31, 2019
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2019 – March 23, 2023
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
March 1, 2019 – March 23, 2023
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2019 – March 31, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2018 – July 31, 2018
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2017 – November 14, 2018
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
November 1, 2016 – November 30, 2016
Resolved
Sample Siting Plan Errors (RTCR)
—
Revised Total Coliform Rule
April 1, 2016 – May 9, 2023
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 2016 – March 31, 2016
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2015 – September 30, 2015
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2015 – June 3, 2015
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2015 – December 31, 2015
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2015 – December 31, 2015
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2014 – December 31, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2014 – October 31, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2013 – October 31, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2013 – September 10, 2013
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2013 – November 18, 2013
Resolved
Monitoring, Regular
—
Arsenic
July 1, 2013 – September 30, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2013 – May 31, 2013
Resolved
Monitoring, Regular
—
Arsenic
April 1, 2013 – June 30, 2013
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 2013 – January 31, 2013
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Arsenic
October 1, 2012 – December 31, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2012 – September 30, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2012 – August 31, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2012 – September 30, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2012 – June 30, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2011 – September 30, 2011
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2011 – July 31, 2012
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2011 – December 31, 2011
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2011 – December 31, 2011
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2011 – December 31, 2011
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2011 – December 31, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2010 – December 31, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2010 – August 31, 2010
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2010 – July 31, 2012
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2010 – December 31, 2010
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2010 – December 31, 2010
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2010 – December 31, 2010
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2009 – July 31, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2009 – February 28, 2009
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 2009 – January 31, 2009
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2008 – September 25, 2008
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2008 – July 31, 2012
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2008 – December 21, 2011
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – July 31, 2012
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2004 – December 31, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2004 – November 30, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2004 – October 31, 2004
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2004 – July 31, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2003 – May 6, 2003
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2003 – May 6, 2003
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2003 – May 6, 2003
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2003 – June 30, 2003
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2003 – May 6, 2003
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 2003 – January 22, 2003
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Antimony, Total
October 8, 1999 – October 7, 2000
Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
August 1, 2025	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Unaddressed
March 1, 2025 – March 31, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
February 1, 2025 – February 28, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2024 – February 14, 2025	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2024	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Unaddressed
April 1, 2024 – August 9, 2024	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2024 – December 31, 2024	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2024 – December 31, 2024	Monitoring, Regular	Nitrite	—	Resolved
October 1, 2023 – November 27, 2023	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2023 – July 31, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2023	Public Notification Violation for NPDWR Violation	Public Notice	—	Unaddressed
July 1, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Unaddressed
September 1, 2022 – October 27, 2022	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2022 – March 23, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
May 1, 2022 – July 19, 2022	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
March 1, 2022 – April 27, 2022	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2021 – December 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
August 1, 2021 – August 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2021 – March 23, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
June 1, 2021 – July 21, 2021	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2021 – December 31, 2021	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2021 – December 31, 2021	Monitoring, Regular	Nitrate	—	Resolved
August 1, 2020 – September 16, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2020 – March 23, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2020 – September 16, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
June 1, 2020 – August 6, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
May 1, 2020 – August 6, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2020 – August 6, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
March 1, 2020 – May 27, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
February 1, 2020 – May 27, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2020 – February 24, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2019 – February 24, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
November 1, 2019 – February 24, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2019 – February 24, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
September 1, 2019 – September 30, 2019	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2019 – July 31, 2019	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2019 – March 23, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
March 1, 2019 – March 23, 2023	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
March 1, 2019 – March 31, 2019	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2018 – July 31, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2017 – November 14, 2018	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
November 1, 2016 – November 30, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2016 – May 9, 2023	Sample Siting Plan Errors (RTCR)	Revised Total Coliform Rule	—	Resolved
March 1, 2016 – March 31, 2016	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 2015 – September 30, 2015	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 2015 – June 3, 2015	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2015 – December 31, 2015	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2015 – December 31, 2015	Monitoring, Regular	Nitrite	—	Resolved
December 1, 2014 – December 31, 2014	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2014 – October 31, 2014	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2013 – October 31, 2013	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 2013 – September 10, 2013	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2013 – November 18, 2013	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2013 – September 30, 2013	Monitoring, Regular	Arsenic	—	Resolved
May 1, 2013 – May 31, 2013	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 2013 – June 30, 2013	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2013 – January 31, 2013	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Nitrate	—	Resolved
October 1, 2012 – December 31, 2012	Monitoring, Regular	Arsenic	—	Resolved
September 1, 2012 – September 30, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
August 1, 2012 – August 31, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
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	Resolved
September 1, 2011 – September 30, 2011	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2011 – July 31, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2011 – December 31, 2011	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2011 – December 31, 2011	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2011 – December 31, 2011	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2011 – December 31, 2011	Monitoring, Regular	Nitrate	—	Resolved
October 1, 2010 – December 31, 2010	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
August 1, 2010 – August 31, 2010	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2010 – July 31, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Nitrate	—	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
July 1, 2009 – July 31, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
February 1, 2009 – February 28, 2009	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2009 – January 31, 2009	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 2008 – September 25, 2008	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2008 – July 31, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2008 – December 21, 2011	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2006 – July 31, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrate	—	Resolved
December 1, 2004 – December 31, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 2004 – November 30, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2004 – October 31, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2004 – July 31, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
November 1, 2003 – May 6, 2003	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2003 – May 6, 2003	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 2003 – May 6, 2003	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 2003 – June 30, 2003	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
May 1, 2003 – May 6, 2003	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2003 – January 22, 2003	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 8, 1999 – October 7, 2000	Maximum Contaminant Level Violation, Single Sample	Antimony, Total	Health-based	Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

June 26, 2025State Formal Notice of Violation issued1 linked violation
June 26, 2025State Formal Notice of Violation issued1 linked violation
June 26, 2025State Formal Notice of Violation issued1 linked violation
June 26, 2025State Formal Notice of Violation issued1 linked violation
May 6, 2025State Compliance achieved1 linked violation
May 6, 2025State Compliance achieved1 linked violation
April 18, 2025State Formal Notice of Violation issued1 linked violation
April 18, 2025State Formal Notice of Violation issued1 linked violation
April 18, 2025State Formal Notice of Violation issued1 linked violation
April 18, 2025State Formal Notice of Violation issued1 linked violation
April 17, 2025State Compliance achieved1 linked violation
April 17, 2025State Compliance achieved1 linked violation
March 7, 2025State Formal Notice of Violation issued1 linked violation
February 14, 2025State Compliance achieved1 linked violation
August 9, 2024State Compliance achieved1 linked violation
December 29, 2023State Formal Notice of Violation issued1 linked violation
November 27, 2023State Compliance achieved1 linked violation
August 16, 2023State Compliance achieved1 linked violation
May 9, 2023State Compliance achieved1 linked violation
March 23, 2023State Compliance achieved1 linked violation
March 23, 2023State Compliance achieved1 linked violation
March 23, 2023State Compliance achieved1 linked violation
March 23, 2023State Compliance achieved1 linked violation
March 23, 2023State Compliance achieved1 linked violation
January 31, 2023State Formal Notice of Violation issued1 linked violation
December 5, 2022State Compliance achieved1 linked violation
December 5, 2022State Compliance achieved1 linked violation
October 27, 2022State Compliance achieved1 linked violation
July 19, 2022State Compliance achieved1 linked violation
April 27, 2022State Compliance achieved1 linked violation
March 30, 2022State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 29, 2022State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
March 29, 2022State Formal Notice of Violation issued1 linked violation
March 29, 2022State Formal Notice of Violation issued1 linked violation
March 29, 2022State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
March 29, 2022State Public Notification issued1 linked violation
March 29, 2022State Public Notification issued1 linked violation
January 19, 2022State Compliance achieved1 linked violation
January 13, 2022State Public Notification requested1 linked violation
January 13, 2022State Formal Notice of Violation issued1 linked violation
September 8, 2021State Compliance achieved1 linked violation
July 21, 2021State Compliance achieved1 linked violation
March 31, 2021State Formal Notice of Violation issued1 linked violation
March 31, 2021State Public Notification issued1 linked violation
September 16, 2020State Compliance achieved1 linked violation
September 16, 2020State Compliance achieved1 linked violation
August 6, 2020State Compliance achieved1 linked violation
August 6, 2020State Compliance achieved1 linked violation
August 6, 2020State Compliance achieved1 linked violation
July 31, 2020State Formal Notice of Violation issued1 linked violation
July 31, 2020State Public Notification issued1 linked violation
May 27, 2020State Compliance achieved1 linked violation
May 27, 2020State Compliance achieved1 linked violation
February 24, 2020State Compliance achieved1 linked violation
February 24, 2020State Compliance achieved1 linked violation
February 24, 2020State Compliance achieved1 linked violation
February 24, 2020State Compliance achieved1 linked violation
December 3, 2019State Public Notification issued1 linked violation
December 3, 2019State Formal Notice of Violation issued1 linked violation
December 3, 2019State Formal Notice of Violation issued1 linked violation
October 14, 2019State Compliance achieved1 linked violation
August 29, 2019State Compliance achieved1 linked violation
April 3, 2019State Compliance achieved1 linked violation
January 10, 2019State Formal Notice of Violation issued1 linked violation
January 10, 2019State Public Notification issued1 linked violation
November 14, 2018State Compliance achieved1 linked violation
August 1, 2018State Compliance achieved1 linked violation
December 1, 2017State Formal Notice of Violation issued1 linked violation
August 25, 2017State Public Notification issued1 linked violation
August 25, 2017State Formal Notice of Violation issued1 linked violation
February 27, 2017State Formal Notice of Violation issued1 linked violation
February 27, 2017State Public Notification issued1 linked violation
January 27, 2017State Compliance achieved1 linked violation
May 31, 2016State Public Notification issued1 linked violation
May 31, 2016State Formal Notice of Violation issued1 linked violation
April 6, 2016State Compliance achieved1 linked violation
March 23, 2016State Compliance achieved1 linked violation
March 23, 2016State Compliance achieved1 linked violation
March 8, 2016State Formal Notice of Violation issued1 linked violation
March 8, 2016State Formal Notice of Violation issued1 linked violation
March 8, 2016State Public Notification issued1 linked violation
March 8, 2016State Public Notification issued1 linked violation
December 15, 2015State Compliance achieved1 linked violation
December 2, 2015State Formal Notice of Violation issued1 linked violation
December 2, 2015State Public Notification issued1 linked violation
August 21, 2015State Public Notification issued1 linked violation
August 21, 2015State Formal Notice of Violation issued1 linked violation
July 15, 2015State Compliance achieved1 linked violation
July 15, 2015State Compliance achieved1 linked violation
June 3, 2015State Compliance achieved1 linked violation
March 5, 2015State Formal Notice of Violation issued1 linked violation
March 5, 2015State Formal Notice of Violation issued1 linked violation
March 5, 2015State Public Notification requested1 linked violation
March 5, 2015State Public Notification requested1 linked violation
March 20, 2014State Formal Notice of Violation issued1 linked violation
March 20, 2014State Formal Notice of Violation issued1 linked violation
March 20, 2014State Formal Notice of Violation issued1 linked violation
March 20, 2014State Formal Notice of Violation issued1 linked violation
March 11, 2014State Compliance achieved1 linked violation
March 11, 2014State Compliance achieved1 linked violation
February 20, 2014State Formal Notice of Violation issued1 linked violation
February 20, 2014State Public Notification issued1 linked violation
November 21, 2013State Compliance achieved1 linked violation
November 21, 2013State Compliance achieved1 linked violation
November 18, 2013State Compliance achieved1 linked violation
November 13, 2013State Compliance achieved1 linked violation
November 13, 2013State Compliance achieved1 linked violation
October 3, 2013State Public Notification issued1 linked violation
October 3, 2013State Formal Notice of Violation issued1 linked violation
September 10, 2013State Compliance achieved1 linked violation
March 5, 2013State Compliance achieved1 linked violation
March 5, 2013State Compliance achieved1 linked violation
March 5, 2013State Compliance achieved1 linked violation
February 6, 2013State Compliance achieved1 linked violation
November 20, 2012State Formal Notice of Violation issued1 linked violation
November 20, 2012State Formal Notice of Violation issued1 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
October 4, 2012State Compliance achieved1 linked violation
September 25, 2012State Public Notification issued1 linked violation
September 25, 2012State Formal Notice of Violation issued1 linked violation
September 13, 2012State Compliance achieved1 linked violation
September 13, 2012State Compliance achieved1 linked violation
September 13, 2012State Compliance achieved1 linked violation
September 13, 2012State Compliance achieved1 linked violation
September 13, 2012State Compliance achieved1 linked violation
August 31, 2012State Compliance achieved1 linked violation
August 3, 2012State Technical Assistance Visit1 linked violation
July 31, 2012State Compliance achieved1 linked violation
July 31, 2012State Compliance achieved1 linked violation
July 31, 2012State Compliance achieved1 linked violation
July 31, 2012State Compliance achieved1 linked violation
July 31, 2012State Compliance achieved1 linked violation
July 31, 2012State Compliance achieved1 linked violation
July 12, 2012State Compliance achieved1 linked violation
July 12, 2012State Compliance achieved1 linked violation
July 12, 2012State Compliance achieved1 linked violation
July 12, 2012State Compliance achieved1 linked violation
July 12, 2012State Compliance achieved1 linked violation
July 12, 2012State Compliance achieved1 linked violation
July 12, 2012State Compliance achieved1 linked violation
July 12, 2012State Compliance achieved1 linked violation
July 12, 2012State Compliance achieved1 linked violation
March 1, 2012State Formal Notice of Violation issued1 linked violation
March 1, 2012State Formal Notice of Violation issued1 linked violation
March 1, 2012State Public Notification issued1 linked violation
March 1, 2012State Public Notification issued1 linked violation
February 27, 2012State Public Notification issued1 linked violation
February 27, 2012State Formal Notice of Violation issued1 linked violation
February 27, 2012State Public Notification issued1 linked violation
February 27, 2012State Formal Notice of Violation issued1 linked violation
December 21, 2011State Compliance achieved1 linked violation
November 28, 2011State Formal Notice of Violation issued1 linked violation
November 28, 2011State Public Notification requested1 linked violation
November 23, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
November 17, 2011State Public Notification issued1 linked violation
November 17, 2011State Formal Notice of Violation issued1 linked violation
May 31, 2011State Formal Notice of Violation issued1 linked violation
February 28, 2011State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 26, 2011State Compliance achieved1 linked violation
January 26, 2011State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
January 26, 2011State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
January 26, 2011State Compliance achieved1 linked violation
January 25, 2011State Compliance achieved1 linked violation
January 20, 2011State Formal Notice of Violation issued1 linked violation
January 20, 2011State Public Notification requested1 linked violation
November 9, 2010State Compliance achieved1 linked violation
November 8, 2010State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 9, 2009State Compliance achieved1 linked violation
December 9, 2009State Compliance achieved1 linked violation
November 20, 2009State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
June 12, 2009State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
June 9, 2009State Violation/Reminder Notice1 linked violation
June 9, 2009State Formal Notice of Violation issued1 linked violation
June 8, 2009State Violation/Reminder Notice1 linked violation
December 8, 2008State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 5, 2008State Compliance achievedgeneral compliance action — not tied to a specific violation on record
September 25, 2008State Compliance achieved1 linked violation
March 23, 2007State Violation/Reminder Notice1 linked violation
November 9, 2006State Violation/Reminder Notice1 linked violation
January 19, 2005State Violation/Reminder Notice1 linked violation
October 29, 2004State Other3 linked violations
May 6, 2003State Compliance achieved4 linked violations
January 22, 2003State Compliance achieved1 linked violation
December 5, 2000State Compliance achievedgeneral compliance action — not tied to a specific violation on record

Contact

Chinle Unified School District #24

9286749701

Chinle, AZ 86503