Aneth Ntua
PWSID: NN4900220
This system has no unresolved violations. The most recent violation on record was 2024-10-01.
This system has more violations on record than 90% of water systems in Arizona.
Violation trend: 7.6 per year over the last 5 years, down from 10.8 per year in the previous 5.
System Details
| Population Served | 1,481 |
| Service Connections | 433 |
| Water Source | Groundwater |
| System Type | Community Water System |
| Owner | Native American |
| Status | Active |
| City | Ft Defiance |
| EPA ZIP on File | 86504 |
Areas Served
- Aneth
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Lead (90th percentile) | 0.0020 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0020 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0010 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0010 mg/L | 0.015 mg/L | Below Action Level |
Violation History (105 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 1005 | MR | 2024-10-01 | Major | Acknowledged |
| 1005 | MR | 2024-10-01 | Major | Acknowledged |
| 1005 | MCL Measured: 0.0182 MG/L (EPA limit: 0.010 mg/L) | 2024-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0182 MG/L (EPA limit: 0.010 mg/L) | 2024-01-01 | Yes | Acknowledged |
| 1005 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1005 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1005 | MCL Measured: 0.0182 MG/L (EPA limit: 0.010 mg/L) | 2023-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0182 MG/L (EPA limit: 0.010 mg/L) | 2023-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0468 MG/L (EPA limit: 0.010 mg/L) | 2023-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0468 MG/L (EPA limit: 0.010 mg/L) | 2023-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0468 MG/L (EPA limit: 0.010 mg/L) | 2023-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0493 MG/L (EPA limit: 0.010 mg/L) | 2023-04-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0493 MG/L (EPA limit: 0.010 mg/L) | 2023-04-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0493 MG/L (EPA limit: 0.010 mg/L) | 2023-04-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0705 MG/L (EPA limit: 0.010 mg/L) | 2023-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0705 MG/L (EPA limit: 0.010 mg/L) | 2023-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0705 MG/L (EPA limit: 0.010 mg/L) | 2023-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0910 MG/L (EPA limit: 0.010 mg/L) | 2022-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0910 MG/L (EPA limit: 0.010 mg/L) | 2022-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0271 MG/L (EPA limit: 0.010 mg/L) | 2022-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0271 MG/L (EPA limit: 0.010 mg/L) | 2022-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0271 MG/L (EPA limit: 0.010 mg/L) | 2022-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0114 MG/L (EPA limit: 0.010 mg/L) | 2022-04-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0114 MG/L (EPA limit: 0.010 mg/L) | 2022-04-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0114 MG/L (EPA limit: 0.010 mg/L) | 2022-04-01 | Yes | Acknowledged |
| 7500 | Other | 2022-04-01 | Returned to Compliance | |
| 7500 | Other | 2022-04-01 | Returned to Compliance | |
| 7500 | Other | 2022-04-01 | Returned to Compliance | |
| 1005 | MCL Measured: 0.0177 MG/L (EPA limit: 0.010 mg/L) | 2022-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0177 MG/L (EPA limit: 0.010 mg/L) | 2022-01-01 | Yes | Acknowledged |
| 1005 | MR | 2022-01-01 | Major | Returned to Compliance |
| 1005 | MR | 2022-01-01 | Major | Returned to Compliance |
| 1052 | MR | 2022-01-01 | Major | Acknowledged |
| 1052 | MR | 2022-01-01 | Major | Acknowledged |
| 1005 | MCL Measured: 0.0187 MG/L (EPA limit: 0.010 mg/L) | 2021-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0187 MG/L (EPA limit: 0.010 mg/L) | 2021-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0307 MG/L (EPA limit: 0.010 mg/L) | 2021-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0307 MG/L (EPA limit: 0.010 mg/L) | 2021-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0177 MG/L (EPA limit: 0.010 mg/L) | 2021-04-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0177 MG/L (EPA limit: 0.010 mg/L) | 2021-04-01 | Yes | Acknowledged |
| 7500 | Other | 2021-04-01 | Returned to Compliance | |
| 7500 | Other | 2021-04-01 | Returned to Compliance | |
| 1005 | MCL Measured: 0.0214 MG/L (EPA limit: 0.010 mg/L) | 2021-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0214 MG/L (EPA limit: 0.010 mg/L) | 2021-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0274 MG/L (EPA limit: 0.010 mg/L) | 2020-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0274 MG/L (EPA limit: 0.010 mg/L) | 2020-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0246 MG/L (EPA limit: 0.010 mg/L) | 2020-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0246 MG/L (EPA limit: 0.010 mg/L) | 2020-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0249 MG/L (EPA limit: 0.010 mg/L) | 2020-04-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0249 MG/L (EPA limit: 0.010 mg/L) | 2020-04-01 | Yes | Acknowledged |
Showing 50 of 105 historical violations.
Understanding This Water System's Record
Aneth Ntua is a community water system water system that draws from groundwater sources and serves a population of 1,481 in Ft Defiance, Arizona. This page shows its complete compliance history as reported to the EPA's Safe Drinking Water Information System (SDWIS), the federal database that tracks every public water system in the United States.
What Do These Violations Mean?
Health-based violations mean the system exceeded an EPA maximum contaminant level (MCL) or failed to provide required treatment. These indicate potential health risks from contaminants like lead, arsenic, bacteria, nitrates, or disinfection byproducts. Non-health-based violations involve monitoring, reporting, or procedural requirements — the system missed a testing deadline or failed to notify customers, but contaminant levels were not necessarily unsafe.
What Should You Do?
Your water utility is required to publish an annual Consumer Confidence Report (CCR) that details test results and any violations. If your system has active health-based violations, consider a certified water filter rated for the specific contaminants involved. The contaminant guides on this site explain health risks and filter options for common pollutants. For the most current results, contact your water utility directly — EPA data can lag weeks or months behind real-time testing.