Neighborhood Report
Grade C
Costa Mesa, CA Neighborhood Water Quality — Grade C
3 ZIP codes · 84 EPA violations
Data source: EPA SDWIS Last verified: 2026-06-04
Water quality varies significantly across Costa Mesa, CA. We analyzed 3 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.
City Overview: Grade C (55/100)
| Grade | Neighborhoods | % |
|---|---|---|
| A | 0 | 0% |
| B | 0 | 0% |
| C | 2 | 67% |
| D | 1 | 33% |
| F | 0 | 0% |
Neighborhood Rankings
Every ZIP code in Costa Mesa ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 92627 | 57 | C | 28 | No data |
| 2 | 92628 | 55 | C | 28 | No data |
| 3 | 92626 | 52 | D | 28 | No data |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 0 neighborhoods score better than county average
- 3 neighborhoods score worse than county average
EPA Violations
- 84 total violations across Costa Mesa
- 48 health-based violations
- 3 of 3 ZIP codes have violations
- 0 ZIP codes exceed EPA lead action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Contaminant 1032 | 51 | 3 |
| Contaminant 1028 | 33 | 3 |
Frequently Asked Questions
What is the safest neighborhood in Costa Mesa?
ZIP code 92627 has the highest safety score in Costa Mesa at 57/100 (grade C). Check the full report for details.
Is Costa Mesa water safe to drink?
Costa Mesa has an average water safety score of 55/100 (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.