Neighborhood Report
Grade B
Downey, CA Neighborhood Water Quality — Grade B
4 ZIP codes · 4 EPA violations
Data source: EPA SDWIS Last verified: 2026-06-03
Water quality varies significantly across Downey, CA. We analyzed 4 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.
City Overview: Grade B (82/100)
| Grade | Neighborhoods | % |
|---|---|---|
| A | 0 | 0% |
| B | 4 | 100% |
| C | 0 | 0% |
| D | 0 | 0% |
| F | 0 | 0% |
Neighborhood Rankings
Every ZIP code in Downey ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 90239 | 83 | B | 1 | 0.0019 mg/L |
| 2 | 90241 | 83 | B | 1 | 0.0019 mg/L |
| 3 | 90242 | 83 | B | 1 | 0.0019 mg/L |
| 4 | 90240 | 78 | B | 1 | 0.0019 mg/L |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 4 neighborhoods score better than county average
- 0 neighborhoods score worse than county average
EPA Violations
- 4 total violations across Downey
- 0 health-based violations
- 4 of 4 ZIP codes have violations
- 0 ZIP codes exceed EPA lead action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Lead | 4 | 4 |
Frequently Asked Questions
What is the safest neighborhood in Downey?
ZIP code 90239 has the highest safety score in Downey at 83/100 (grade B). Check the full report for details.
Is Downey water safe to drink?
Downey has an average water safety score of 82/100 (B). 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.