Chinle, NN

Cottonwood Day School BIA 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): NN0435004
System type: Community Water System
Population served: 185
Service connections: 28
Ownership: federal government
Water source: groundwater (wells)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2025 – March 31, 2025
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 30, 2023
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
October 1, 2022 – November 17, 2022
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
May 1, 2020 – June 19, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2018 – February 28, 2018
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2012 – December 31, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Di(2-ethylhexyl) phthalate
October 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
October 1, 2012 – December 31, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Di(2-ethylhexyl) phthalate
July 1, 2012 – September 30, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Di(2-ethylhexyl) phthalate
April 1, 2012 – June 30, 2012
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2009 – November 12, 2009
Resolved
Monitoring, Regular
—
2,3,7,8-TCDD
January 1, 2008 – December 31, 2010
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – March 7, 2009
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2005 – March 7, 2009
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
LASSO
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
2,3,7,8-TCDD
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Toluene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Styrene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Benzene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Endrin
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Diquat
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Endothall
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Simazine
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Picloram
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 2004 – December 31, 2004
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2004 – December 20, 2005
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2003 – May 8, 2003
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2003 – May 31, 2003
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2002 – September 30, 2002
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2002 – September 30, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 31, 1996 – September 29, 1996
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 31, 1996 – September 29, 1996
Archived

Resolved 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
March 1, 2025 – March 31, 2025	Monitoring, Routine (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 30, 2023	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2022 – November 17, 2022	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
May 1, 2020 – June 19, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
February 1, 2018 – February 28, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2012 – December 31, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2012 – December 31, 2012	Maximum Contaminant Level Violation, Average	Di(2-ethylhexyl) phthalate	Health-based	Resolved
October 1, 2012 – December 31, 2012	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
July 1, 2012 – September 30, 2012	Maximum Contaminant Level Violation, Average	Di(2-ethylhexyl) phthalate	Health-based	Resolved
April 1, 2012 – June 30, 2012	Maximum Contaminant Level Violation, Average	Di(2-ethylhexyl) phthalate	Health-based	Resolved
January 1, 2010 – December 31, 2010	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
November 1, 2009 – November 12, 2009	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	2,3,7,8-TCDD	—	Resolved
July 1, 2006 – March 7, 2009	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2005 – March 7, 2009	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Aldicarb	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	LASSO	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	2,3,7,8-TCDD	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Toluene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Styrene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Benzene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Endrin	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Diquat	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Endothall	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Simazine	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Picloram	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 2004 – December 20, 2005	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
May 1, 2003 – May 8, 2003	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 2003 – May 31, 2003	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
September 1, 2002 – September 30, 2002	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
September 1, 2002 – September 30, 2002	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
August 31, 1996 – September 29, 1996	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
August 31, 1996 – September 29, 1996	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

April 29, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
April 29, 2025State Formal Notice of Violation issued1 linked violation
April 29, 2025State Formal Notice of Violation issued1 linked violation
April 29, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
April 29, 2025State Formal Notice of Violation issued1 linked violation
April 29, 2025State Formal Notice of Violation issued1 linked violation
April 2, 2025State Compliance achieved1 linked violation
February 24, 2025State Compliance achieved1 linked violation
February 24, 2025State Compliance achieved1 linked violation
December 30, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
November 30, 2023State Compliance achieved1 linked violation
November 17, 2022State Compliance achieved1 linked violation
June 19, 2020State Compliance achieved1 linked violation
March 13, 2018State Public Notification received1 linked violation
March 7, 2018State Compliance achieved1 linked violation
February 14, 2013State Compliance achieved1 linked violation
February 14, 2013State Compliance achieved1 linked violation
January 30, 2013State Compliance achieved1 linked violation
January 30, 2013State Compliance achieved1 linked violation
January 14, 2013State Formal Notice of Violation issued1 linked violation
January 14, 2013State Compliance achieved1 linked violation
December 14, 2012State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 3, 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
October 23, 2012State Public Notification issued1 linked violation
October 23, 2012State Formal Notice of Violation issued1 linked violation
February 9, 2012State Public Notification received1 linked violation
November 14, 2011State Public Notification issued1 linked violation
November 14, 2011State Compliance achieved1 linked violation
November 14, 2011State Formal Notice of Violation issued1 linked violation
November 12, 2009State Compliance achieved1 linked violation
June 12, 2009State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
June 8, 2009State Formal Notice of Violation issued1 linked violation
March 7, 2009State Compliance achieved1 linked violation
March 7, 2009State Compliance achieved1 linked violation
May 9, 2007State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 20, 2007State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 19, 2007State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
March 9, 2007State Compliance achieved2 linked violations
November 9, 2006State Violation/Reminder Notice1 linked violation
December 20, 2005State Compliance achieved1 linked violation
November 15, 2005State Violation/Reminder Notice1 linked violation
February 14, 2005State Compliance achieved54 linked violations
May 8, 2003State Compliance achieved1 linked violation
October 7, 2002State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
October 7, 2002State Compliance achieved1 linked violation
October 4, 2002State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
September 3, 2002State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 5, 2000State Compliance achieved1 linked violation

Contact

BIA Cottonwood Day School

9287253256

Chinle, AZ 86503