Dilkon-Indian Wells-Greasewood-White Cone Ntua
PWSID: NN0400342
This system has unresolved violations related to monitoring, reporting, or procedural requirements, but none involve contaminant levels exceeding EPA health limits.
This system has more violations on record than 93% of water systems in Arizona.
Violation trend: 8.4 per year over the last 5 years, down from 16.0 per year in the previous 5.
System Details
| Population Served | 4,986 |
| Service Connections | 1,458 |
| Water Source | Groundwater |
| System Type | Community Water System |
| Owner | Native American |
| Status | Active |
| City | Fort Defiance |
| EPA ZIP on File | 86504 |
Areas Served
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Lead (90th percentile) | 0.0025 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 |
1 Active Violations
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 8000 | Other | 2016-04-01 | Open |
Violation History (137 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 2950 | MCL Measured: 0.0870 MG/L | 2024-01-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 0.0870 MG/L | 2024-01-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 0.1117 MG/L | 2023-10-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 0.1117 MG/L | 2023-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1112 MG/L | 2023-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1112 MG/L | 2023-07-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 0.1112 MG/L | 2023-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1170 MG/L | 2023-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1170 MG/L | 2023-04-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 0.1170 MG/L | 2023-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1393 MG/L | 2023-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1393 MG/L | 2023-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1393 MG/L | 2023-01-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 0.1393 MG/L | 2023-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1405 MG/L | 2022-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1405 MG/L | 2022-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1405 MG/L | 2022-10-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 0.1034 MG/L | 2022-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1034 MG/L | 2022-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1034 MG/L | 2022-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1034 MG/L | 2022-07-01 | Yes | Returned to Compliance |
| 8000 | MON | 2022-07-01 | Major | Returned to Compliance |
| 8000 | MON | 2022-07-01 | Major | Returned to Compliance |
| 8000 | MON | 2022-07-01 | Major | Returned to Compliance |
| 7500 | Other | 2022-07-01 | Returned to Compliance | |
| 7500 | Other | 2022-07-01 | Returned to Compliance | |
| 2950 | MCL Measured: 0.0868 MG/L | 2022-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0868 MG/L | 2022-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0868 MG/L | 2022-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0868 MG/L | 2022-04-01 | Yes | Returned to Compliance |
| 7500 | Other | 2022-04-01 | Returned to Compliance | |
| 7500 | Other | 2022-04-01 | Returned to Compliance | |
| 7500 | Other | 2022-04-01 | Returned to Compliance | |
| 2950 | MCL Measured: 0.0924 MG/L | 2022-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0924 MG/L | 2022-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0924 MG/L | 2022-01-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 0.0847 MG/L | 2021-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0847 MG/L | 2021-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0847 MG/L | 2021-10-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 0.1027 MG/L | 2021-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1027 MG/L | 2021-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1027 MG/L | 2021-07-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 0.1245 MG/L | 2021-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1245 MG/L | 2021-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1245 MG/L | 2021-04-01 | Yes | Returned to Compliance |
| 7500 | Other | 2021-04-01 | Returned to Compliance | |
| 7500 | Other | 2021-04-01 | Returned to Compliance | |
| 2950 | MCL Measured: 0.1283 MG/L | 2021-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1283 MG/L | 2021-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1283 MG/L | 2021-01-01 | Yes | Returned to Compliance |
Showing 50 of 136 historical violations.
Understanding This Water System's Record
Dilkon-Indian Wells-Greasewood-White Cone Ntua is a community water system water system that draws from groundwater sources and serves a population of 4,986 in Fort 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.