Neighborhood Report
Grade A
Corvallis, OR Neighborhood Water Quality — Grade A
4 ZIP codes · 24 EPA violations
Data source: EPA SDWIS Last verified: 2026-06-04
Water quality varies significantly across Corvallis, OR. We analyzed 4 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.
City Overview: Grade A (94/100)
| Grade | Neighborhoods | % |
|---|---|---|
| A | 4 | 100% |
| B | 0 | 0% |
| C | 0 | 0% |
| D | 0 | 0% |
| F | 0 | 0% |
Neighborhood Rankings
Every ZIP code in Corvallis ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 97331 | 98 | A | 6 | 0.0014 mg/L |
| 2 | 97339 | 98 | A | 6 | 0.0014 mg/L |
| 3 | 97330 | 89 | A | 6 | 0.0014 mg/L |
| 4 | 97333 | 89 | A | 6 | 0.0014 mg/L |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 3 neighborhoods score better than county average
- 1 neighborhoods score worse than county average
EPA Violations
- 24 total violations across Corvallis
- 4 health-based violations
- 4 of 4 ZIP codes have violations
- 0 ZIP codes exceed EPA lead action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Surface Water Treatment Rule | 12 | 4 |
| Lead | 4 | 4 |
| Stage 2 DBP Rule | 4 | 4 |
| Consumer Confidence Report Rule | 4 | 4 |
Frequently Asked Questions
What is the safest neighborhood in Corvallis?
ZIP code 97331 has the highest safety score in Corvallis at 98/100 (grade A). Check the full report for details.
Is Corvallis water safe to drink?
Corvallis has an average water safety score of 94/100 (A). 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.