Public water system record

Aneth NTUA

On record as serving Aneth, San Juan County, UT · Serves 1,481 people

Federal records show 30 health-based violations and 13 monitoring/reporting issues for Aneth NTUA in the last ten years. The most serious issue in this window was a Arsenic violation that EPA lists as archived, not resolved.

NN4900220
FT DEFIANCE
AZ
1,481 served

System profile

Source water Groundwater

ZIP 86504

EPA system ID NN4900220

Verify this system on EPA ECHO →

Health-based violations, last 10 years: 30
Resolved: 0
Unresolved: 0
Archived by EPA: 30
Any acute record: No
Monitoring issues, last 10 years: 13

Key facts

Aneth NTUA draws water from 3 wells.
Highest measured level in the last 10 years: Arsenic, 0.091 mg/L, federal limit 0.01 mg/L (9.1 times the limit), 2022.
Most recent formal enforcement: compliance order (no penalty) by Navajo Nation EPA, May 2013.
Record on file since 2004, with 20 health-based violations before October 19, 2016.

Check whether Aneth NTUA serves your address

Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant	Rule family	Start date	Status	Acute
Arsenic Contaminant limit exceeded Measured 0.0182 mg/L, federal limit 0.01 mg/L (1.8 times the limit)	330	Jan 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0182 mg/L, federal limit 0.01 mg/L (1.8 times the limit)	330	Oct 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0468 mg/L, federal limit 0.01 mg/L (4.7 times the limit)	330	Jul 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0493 mg/L, federal limit 0.01 mg/L (4.9 times the limit)	330	Apr 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0705 mg/L, federal limit 0.01 mg/L (7.1 times the limit)	330	Jan 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.091 mg/L, federal limit 0.01 mg/L (9.1 times the limit)	330	Oct 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0271 mg/L, federal limit 0.01 mg/L (2.7 times the limit)	330	Jul 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0114 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	330	Apr 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0177 mg/L, federal limit 0.01 mg/L (1.8 times the limit)	330	Jan 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0187 mg/L, federal limit 0.01 mg/L (1.9 times the limit)	330	Oct 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0307 mg/L, federal limit 0.01 mg/L (3.1 times the limit)	330	Jul 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0177 mg/L, federal limit 0.01 mg/L (1.8 times the limit)	330	Apr 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0214 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	330	Jan 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0274 mg/L, federal limit 0.01 mg/L (2.7 times the limit)	330	Oct 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0246 mg/L, federal limit 0.01 mg/L (2.5 times the limit)	330	Jul 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0249 mg/L, federal limit 0.01 mg/L (2.5 times the limit)	330	Apr 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0222 mg/L, federal limit 0.01 mg/L (2.2 times the limit)	330	Jan 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0145 mg/L, federal limit 0.01 mg/L (1.5 times the limit)	330	Oct 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0218 mg/L, federal limit 0.01 mg/L (2.2 times the limit)	330	Jul 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0232 mg/L, federal limit 0.01 mg/L (2.3 times the limit)	330	Apr 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0238 mg/L, federal limit 0.01 mg/L (2.4 times the limit)	330	Jan 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0238 mg/L, federal limit 0.01 mg/L (2.4 times the limit)	330	Oct 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0205 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	330	Jul 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0235 mg/L, federal limit 0.01 mg/L (2.4 times the limit)	330	Apr 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0265 mg/L, federal limit 0.01 mg/L (2.7 times the limit)	330	Jan 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0208 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	330	Oct 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0138 mg/L, federal limit 0.01 mg/L (1.4 times the limit)	330	Jul 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0152 mg/L, federal limit 0.01 mg/L (1.5 times the limit)	330	Apr 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0119 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	330	Jan 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0113 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	330	Oct 1, 2016	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue	Start date	Status
Arsenic Monitoring and reporting	Oct 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Arsenic Monitoring and reporting	Jan 1, 2024	Resolved
Public Notice OTHER	Apr 1, 2022	Resolved
Arsenic Monitoring and reporting	Jan 1, 2022	Resolved
Public Notice OTHER	Apr 1, 2021	Resolved
Public Notice OTHER	Apr 1, 2020	Resolved
Total Trihalomethanes (TTHMs) Monitoring and reporting	Jan 1, 2020	Resolved
Haloacetic Acids (HAA5) Monitoring and reporting	Jan 1, 2020	Resolved
Arsenic Monitoring and reporting	Jan 1, 2019	Resolved
Public Notice OTHER	Oct 1, 2018	Resolved
Public Notice OTHER	Jan 1, 2017	Resolved
Revised Total Coliform Rule OTHER	Apr 1, 2016	Resolved
Stage 2 Disinfection Byproducts Rule Monitoring and reporting	Oct 1, 2013	Resolved

Full record since 2004

EPA's records for Aneth NTUA go back to 2004. Before October 19, 2016 they list 20 health-based violations (5 resolved, 15 archived by EPA without a recorded fix) and 70 monitoring or reporting violations.

Violations that began in	Health-based	Monitoring and reporting
2000s	0	57
2010 to October 18, 2016	20	13
October 19, 2016 to 2019	12	3
2020s	17	8

Most recent health-based violation before October 19, 2016: Arsenic, began October 2016, Archived.

Show all 20 health-based violations before October 19, 2016

Contaminant	Start date	Status
Arsenic Contaminant limit exceeded Measured 0.0113 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Oct 1, 2016	Archived
Arsenic Contaminant limit exceeded Measured 0.0132 mg/L, federal limit 0.01 mg/L (1.3 times the limit)	Jul 1, 2016	Archived
Arsenic Contaminant limit exceeded Measured 0.0208 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	Apr 1, 2016	Archived
Arsenic Contaminant limit exceeded Measured 0.0207 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	Jan 1, 2016	Archived
Arsenic Contaminant limit exceeded Measured 0.0243 mg/L, federal limit 0.01 mg/L (2.4 times the limit)	Oct 1, 2015	Archived
Arsenic Contaminant limit exceeded Measured 0.0321 mg/L, federal limit 0.01 mg/L (3.2 times the limit)	Jul 1, 2015	Archived
Arsenic Contaminant limit exceeded Measured 0.0229 mg/L, federal limit 0.01 mg/L (2.3 times the limit)	Jan 1, 2015	Archived
Arsenic Contaminant limit exceeded Measured 0.01078 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Oct 1, 2014	Archived
Arsenic Contaminant limit exceeded Measured 0.0107 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Jul 1, 2014	Resolved
Arsenic Contaminant limit exceeded Measured 0.0107 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Apr 1, 2014	Resolved
Arsenic Contaminant limit exceeded Measured 0.01556 mg/L, federal limit 0.01 mg/L (1.6 times the limit)	Jan 1, 2014	Archived
Arsenic Contaminant limit exceeded Measured 0.01556 mg/L, federal limit 0.01 mg/L (1.6 times the limit)	Oct 1, 2013	Archived
Arsenic Contaminant limit exceeded Measured 0.01223 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	Jul 1, 2013	Resolved
Arsenic Contaminant limit exceeded Measured 0.01198 mg/L, federal limit 0.01 mg/L (1.2 times the limit)	Apr 1, 2013	Archived
Arsenic Contaminant limit exceeded Measured 0.01563 mg/L, federal limit 0.01 mg/L (1.6 times the limit)	Jan 1, 2013	Archived
Arsenic Contaminant limit exceeded Measured 0.01115 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Oct 1, 2012	Archived
Arsenic Contaminant limit exceeded Measured 0.01115 mg/L, federal limit 0.01 mg/L (1.1 times the limit)	Jul 1, 2012	Resolved
Arsenic Contaminant limit exceeded Measured 0.02138 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	Apr 1, 2012	Archived
Arsenic Contaminant limit exceeded Measured 0.03558 mg/L, federal limit 0.01 mg/L (3.6 times the limit)	Jan 1, 2012	Archived
Combined Uranium Contaminant limit exceeded	Oct 1, 2010	Resolved

Enforcement actions

Navajo Nation EPA took 1 formal enforcement action against Aneth NTUA in 2013, filed as 54 records in EPA's data. The most recent was a compliance order (no penalty) in May 2013.

Date	By	Action	Violations covered
May 20, 2013	Navajo Nation EPA	Compliance order (no penalty)	54 violations (48 health-based): Arsenic

What the violations mean

Arsenic

30 incidents

Arsenic exceeded the federal limit

Long-term arsenic exposure is linked to cancer and cardiovascular effects

Where the water comes from

Aneth NTUA draws water from 3 wells. 1 other community water system buys water from Aneth NTUA.

Community systems that buy water from it

Aneth Community School BIA Montezuma Creek, UT

Annual water quality report

Aneth NTUA must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by EPA Region 9.

Certified drinking water labs by state EPA guidance for private wells