Nogales Water Quality
Arizona
The tap water in Nogales, Arizona is served by 4 EPA-regulated water systems covering approximately 22,692 people. 10 health-based violations are on record, most recently for 0700 in 2025. Data source: EPA Safe Drinking Water Information System.
Drinking water in Nogales, Arizona is delivered through 4 EPA-regulated community water systems serving an estimated 22,692 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
The SDWIS record for Nogales shows 10 total violations across all 4 systems, of which 10 are health-based, meaning either a Maximum Contaminant Level (MCL) was exceeded or a required treatment technique was not followed. Contaminants cited in health-based violations include 0700, 5200, 8000, 1094. 1 TRI-reporting industrial facility is also located within the city limits.
A past EPA violation does not mean the water is currently unsafe, utilities are required to notify customers and remediate under state primacy oversight. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Arizona drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| NOGALES CITY OF | 22,000 | 5 | Health |
| TOWN & COUNTRY - PRESTON | 430 | 2 | Health |
| THE GRAND ACRES | 153 | 1 | Health |
| KINO RANCH 2 | 109 | 2 | Health |
Does this city have health-based water violations?
Health-based violations indicate contaminant levels that exceeded EPA maximum contaminant levels (MCLs). This does not necessarily mean water is currently unsafe.
| Contaminant | Begin Date |
|---|---|
| 0700 | 2025-04-14 |
| 5200 | 2024-10-17 |
| 5200 | 2024-10-17 |
| 5200 | 2024-10-17 |
| 5200 | 2024-10-17 |
| 0700 | 2021-11-15 |
| 0700 | 2021-11-15 |
| 8000 | 2016-11-11 |
| 8000 | 2016-10-25 |
| 1094 | 2012-01-01 |
TRI Facilities in Nogales
| Facility | Total Releases |
|---|---|
| US Cbp Nogales Border Patrol Station & Range #AZ0047 | 6.7K lbs |
Frequently Asked Questions
Is Nogales, Arizona water safe to drink? ▼
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About This Data
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). Violations are reported by state agencies to EPA and include both health-based (MCL exceedances) and monitoring/reporting violations.
A reported violation does not necessarily mean water is currently unsafe to drink. Many violations are resolved quickly, and public water systems are required to notify customers of significant issues. For current water quality, contact your local water utility.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.