Chinle, NN

Canyon De Chelly National Monument Water System

Current status

1 item on record is 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): NN0403022
System type: Community Water System
Population served: 55
Service connections: 37
Ownership: federal government
Water source: groundwater (wells)

Violation history

Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
August 1, 2024 – September 25, 2024
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
September 1, 2022 – October 27, 2022
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
August 1, 2022 – October 27, 2022
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
November 1, 2021 – February 15, 2022
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
May 1, 2021 – June 24, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – April 14, 2021
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
May 1, 2020 – July 13, 2020
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
April 1, 2020 – July 13, 2020
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
December 1, 2019 – February 4, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2018 – June 7, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2016 – July 31, 2016
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2015 – August 3, 2015
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2015 – July 7, 2015
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – January 8, 2013
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2011 – December 31, 2011
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2011 – December 31, 2011
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2011 – July 7, 2010
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2011 – July 7, 2010
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2010 – March 3, 2011
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2010 – July 7, 2010
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2009 – February 25, 2010
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2008 – February 25, 2010
Resolved
Monitoring, Regular
—
2,3,7,8-TCDD
January 1, 2007 – December 31, 2007
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – February 25, 2010
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2006 – December 31, 2006
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2005 – February 25, 2010
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
LASSO
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Benzene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Styrene
January 1, 2005 – December 31, 2007
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2005 – December 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Toluene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Barium
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Chromium
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
CYANIDE
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Mercury
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Selenium
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Endrin
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Diquat
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Endothall
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Simazine
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Picloram
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2004 – November 30, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2004 – July 31, 2004
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
July 1, 2004 – July 31, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2004 – June 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2004 – January 1, 2005
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2004 – January 1, 2005
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2004 – July 7, 2010
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2002 – November 30, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2002 – November 30, 2002
Archived
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
February 1, 2002 – February 28, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2001 – December 31, 2001
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2001 – November 30, 2001
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2001 – November 30, 2001
Archived
Monitoring, Regular
—
Nitrite
January 1, 1996 – December 31, 1996
Archived
Monitoring, Regular
—
Nitrate
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
Nitrite
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1996 – December 31, 1996
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
August 1, 2024 – September 25, 2024	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
September 1, 2022 – October 27, 2022	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
August 1, 2022 – October 27, 2022	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
November 1, 2021 – February 15, 2022	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
May 1, 2021 – June 24, 2021	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2020 – April 14, 2021	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
May 1, 2020 – July 13, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2020 – July 13, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2019 – February 4, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2018 – June 7, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2016 – July 31, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
August 1, 2015 – August 3, 2015	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2015 – July 7, 2015	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2012 – January 8, 2013	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2011 – December 31, 2011	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2011 – December 31, 2011	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2011 – July 7, 2010	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2011 – July 7, 2010	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2010 – March 3, 2011	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2010 – July 7, 2010	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2009 – February 25, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2008 – February 25, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2007 – December 31, 2007	Monitoring, Regular	2,3,7,8-TCDD	—	Resolved
July 1, 2006 – February 25, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2005 – February 25, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Aldicarb	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	LASSO	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Benzene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Styrene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Toluene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Barium	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Cadmium	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Chromium	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	CYANIDE	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Mercury	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Selenium	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Endrin	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Diquat	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Endothall	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Simazine	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Picloram	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Carbofuran	—	Resolved
November 1, 2004 – November 30, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2004 – July 31, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2004 – July 31, 2004	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
June 1, 2004 – June 30, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2004 – January 1, 2005	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2004 – January 1, 2005	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2004 – July 7, 2010	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
November 1, 2002 – November 30, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 2002 – November 30, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
February 1, 2002 – February 28, 2002	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
December 1, 2001 – December 31, 2001	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 2001 – November 30, 2001	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 2001 – November 30, 2001	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
January 1, 1996 – December 31, 1996	Monitoring, Regular	Nitrite	—	Archived
January 1, 1996 – December 31, 1996	Monitoring, Regular	Nitrate	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Nitrite	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Nitrate	—	Archived

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

Enforcement actions

March 7, 2025State Formal Notice of Violation issued1 linked violation
September 25, 2024State Compliance achieved1 linked violation
October 27, 2022State Compliance achieved1 linked violation
October 27, 2022State Compliance achieved1 linked violation
February 15, 2022State Compliance achieved1 linked violation
June 24, 2021State Compliance achieved1 linked violation
April 14, 2021State Compliance achieved1 linked violation
March 31, 2021State Public Notification issued1 linked violation
March 31, 2021State Formal Notice of Violation issued1 linked violation
July 13, 2020State Compliance achieved1 linked violation
July 13, 2020State Compliance achieved1 linked violation
February 4, 2020State Compliance achieved1 linked violation
September 27, 2018State Formal Notice of Violation issued1 linked violation
September 27, 2018State Public Notification issued1 linked violation
June 7, 2017State Compliance achieved1 linked violation
December 20, 2016State Compliance achieved1 linked violation
December 8, 2016State Formal Notice of Violation issued1 linked violation
December 2, 2015State Public Notification issued1 linked violation
December 2, 2015State Public Notification issued1 linked violation
December 2, 2015State Formal Notice of Violation issued1 linked violation
December 2, 2015State Formal Notice of Violation issued1 linked violation
August 3, 2015State Compliance achieved1 linked violation
July 7, 2015State Compliance achieved1 linked violation
January 8, 2013State Compliance achieved1 linked violation
January 8, 2013State Compliance achieved1 linked violation
January 8, 2013State 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
March 1, 2012State Public Notification issued1 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
February 27, 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 Formal Notice of Violation issued1 linked violation
November 16, 2011State Compliance achieved1 linked violation
November 16, 2011State Public Notification issued1 linked violation
November 16, 2011State Compliance achieved1 linked violation
November 16, 2011State Formal Notice of Violation issued1 linked violation
March 3, 2011State Compliance achieved1 linked violation
February 28, 2011State Violation/Reminder Noticegeneral 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 25, 2011State Compliance achievedgeneral compliance action — not tied to a specific violation on record
January 25, 2011State Compliance achieved1 linked violation
January 25, 2011State Compliance achievedgeneral compliance action — not tied to a specific violation on record
January 25, 2011State Compliance achieved1 linked violation
December 2, 2010State Technical Assistance Visitgeneral compliance action — not tied to a specific violation on record
July 7, 2010State Compliance achieved1 linked violation
July 7, 2010State Compliance achieved1 linked violation
July 7, 2010State Compliance achieved1 linked violation
July 7, 2010State Compliance achieved1 linked violation
May 4, 2010State Technical Assistance Visit1 linked violation
May 3, 2010State Compliance achieved1 linked violation
May 3, 2010State Compliance achieved1 linked violation
May 3, 2010State Compliance achieved1 linked violation
March 22, 2010State Compliance achieved1 linked violation
March 22, 2010State Compliance achieved1 linked violation
March 22, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 22, 2010State Compliance achieved1 linked violation
March 22, 2010State Compliance achieved1 linked violation
March 22, 2010State Compliance achieved1 linked violation
March 22, 2010State Compliance achieved1 linked violation
March 22, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 22, 2010State Compliance achieved1 linked violation
March 22, 2010State Compliance achieved1 linked violation
March 22, 2010State Compliance achieved1 linked violation
February 25, 2010State Compliance achieved1 linked violation
February 25, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 25, 2010State Compliance achieved1 linked violation
February 25, 2010State Compliance achieved1 linked violation
February 25, 2010State Compliance achieved1 linked violation
February 25, 2010State Technical Assistance Visitgeneral compliance action — not tied to a specific violation on record
November 20, 2009State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
August 4, 2009State Compliance achieved1 linked violation
August 4, 2009State Compliance achieved1 linked violation
August 4, 2009State Compliance achieved1 linked violation
August 4, 2009State Compliance achieved1 linked violation
August 4, 2009State Compliance achieved1 linked violation
July 13, 2009State Compliance achieved1 linked violation
July 13, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
May 5, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
April 7, 2009State Compliance achieved1 linked violation
October 9, 2008State Violation/Reminder Notice1 linked violation
February 13, 2008State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
March 15, 2007State Compliance achieved1 linked violation
March 15, 2007State Formal Notice of Violation issued16 linked violations
January 1, 2007State Compliance achieved7 linked violations
November 9, 2006State Violation/Reminder Notice1 linked violation
May 12, 2006State Violation/Reminder Notice7 linked violations
November 15, 2005State Violation/Reminder Notice1 linked violation
February 28, 2005State Public Notification received3 linked violations
February 23, 2005State Compliance achieved3 linked violations
December 1, 2004State Violation/Reminder Notice2 linked violations

Contact

Canyon De Chelly National Monument

9286745500

Chinle, AZ 86503