Neighborhood Report
Grade C
Nogales, AZ Neighborhood Water Quality — Grade C
3 ZIP codes · 123 EPA violations
Data source: EPA SDWIS Last verified: 2026-06-04
Water quality varies significantly across Nogales, AZ. We analyzed 3 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.
City Overview: Grade C (67/100)
| Grade | Neighborhoods | % |
|---|---|---|
| A | 0 | 0% |
| B | 1 | 33% |
| C | 2 | 67% |
| D | 0 | 0% |
| F | 0 | 0% |
Neighborhood Rankings
Every ZIP code in Nogales ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 85662 | 71 | B | 41 | 0.0010 mg/L |
| 2 | 85628 | 68 | C | 41 | 0.0010 mg/L |
| 3 | 85621 | 63 | C | 41 | 0.0010 mg/L |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 2 neighborhoods score better than county average
- 1 neighborhoods score worse than county average
EPA Violations
- 123 total violations across Nogales
- 12 health-based violations
- 3 of 3 ZIP codes have violations
- 0 ZIP codes exceed EPA lead action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Lead and Copper Rule | 18 | 3 |
| Revised Total Coliform Rule | 18 | 3 |
| Barium | 15 | 3 |
| Stage 1 DBP Rule | 15 | 3 |
| Stage 2 DBP Rule | 12 | 3 |
Frequently Asked Questions
What is the safest neighborhood in Nogales?
ZIP code 85662 has the highest safety score in Nogales at 71/100 (grade B). Check the full report for details.
Is Nogales water safe to drink?
Nogales has an average water safety score of 67/100 (C). Water quality varies by neighborhood — no ZIP codes currently exceed EPA lead limits. Always check your specific ZIP code.
Related Pages
Data Sources
- EPA SDWIS
- U.S. Census Bureau
Updated daily.