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Public water system record

Sweetwater NTUA

On record as serving Red Mesa, Apache County, AZ · Serves 2,014 people

Federal records show 10 health-based violations and 12 monitoring/reporting issues for Sweetwater NTUA in the last ten years. The most serious issue in this window was a Arsenic violation that EPA lists as archived, not resolved.

  • NN0400399
  • FT DEFIANCE
  • AZ
  • 2,014 served

System profile

Source water Purchased surface water
ZIP 86504
EPA system ID NN0400399

Verify this system on EPA ECHO →

Health-based violations, last 10 years
10
Resolved
9
Unresolved
0
Archived by EPA
1
Any acute record
No
Monitoring issues, last 10 years
12

Key facts

  • Sweetwater NTUA draws water from 2 wells.
  • Highest measured level in the last 10 years: Arsenic, 0.0139 mg/L, federal limit 0.01 mg/L (1.4 times the limit), 2021.
  • Record on file since 1996, with 8 health-based violations before October 19, 2016.

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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 0.0107 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
 330 Jul 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 0.01235 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
 330 Apr 1, 2024 Resolved No
Arsenic
Contaminant limit exceeded
Measured 0.01348 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
 330 Jan 1, 2024 Resolved No
Arsenic
Contaminant limit exceeded
Measured 0.0132 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
 330 Oct 1, 2023 Resolved No
Arsenic
Contaminant limit exceeded
Measured 0.0108 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
 330 Jul 1, 2023 Resolved No
Arsenic
Contaminant limit exceeded
Measured 0.0139 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
 330 Jan 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0903 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Oct 1, 2020 Resolved No
Arsenic
Contaminant limit exceeded
Measured 0.0115 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
 330 Oct 1, 2020 Resolved No
Arsenic
Contaminant limit exceeded
Measured 0.0115 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
 330 Jul 1, 2020 Resolved No
Arsenic
Contaminant limit exceeded
Measured 0.0119 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
 330 Apr 1, 2020 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Public Notice
OTHER
 Apr 1, 2024 Active
Public Notice
OTHER
 Jan 1, 2024 Active
Public Notice
OTHER
 Oct 1, 2023 Resolved
Arsenic
Monitoring and reporting
 Jan 1, 2022 Resolved
Public Notice
OTHER
 Jan 1, 2021 Resolved
Public Notice
OTHER
 Oct 1, 2020 Resolved
Public Notice
OTHER
 Oct 1, 2020 Resolved
Public Notice
OTHER
 Jul 1, 2020 Resolved
Public Notice
OTHER
 Apr 1, 2020 Resolved
Arsenic
Monitoring and reporting
 Jan 1, 2019 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 1996

EPA's records for Sweetwater NTUA go back to 1996. Before October 19, 2016 they list 8 health-based violations (8 resolved) and 58 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 0 1
2000s 0 46
2010 to October 18, 2016 8 11
October 19, 2016 to 2019 0 1
2020s 10 9

Most recent health-based violation before October 19, 2016: Total Coliform, began September 2015, Resolved.

Show all 8 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 Sep 1, 2015 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.01167 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
 Apr 1, 2014 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.02134 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
 Jan 1, 2014 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.02134 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
 Oct 1, 2013 Resolved
Total Coliform
Contaminant limit exceeded
 Aug 1, 2013 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.02178 mg/L, federal limit 0.01 mg/L (2.2 times the limit)
 Jul 1, 2013 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.01985 mg/L, federal limit 0.01 mg/L (2 times the limit)
 Apr 1, 2013 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.032 mg/L, federal limit 0.01 mg/L (3.2 times the limit)
 Jan 1, 2013 Resolved

What the violations mean

Arsenic

9 incidents

Arsenic exceeded the federal limit

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

Total Trihalomethanes (TTHMs)

1 incident

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Sweetwater NTUA draws water from 2 wells. It also buys water from Farmington Rural-Shiprock-Beclabito NTUA. 2 other community water systems buy water from Sweetwater NTUA.

Buys water from

Community systems that buy water from it

Annual water quality report

Sweetwater 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