Neighborhood Report
Grade C
Oshkosh, WI Neighborhood Water Quality — Grade C
5 ZIP codes · 60 EPA violations
Data source: EPA SDWIS Last verified: 2026-06-04
Water quality varies significantly across Oshkosh, WI. We analyzed 5 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 | 3 | 60% |
| D | 2 | 40% |
| F | 0 | 0% |
Neighborhood Rankings
Every ZIP code in Oshkosh ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 54903 | 60 | C | 12 | 0.0110 mg/L |
| 2 | 54901 | 55 | C | 12 | 0.0110 mg/L |
| 3 | 54904 | 55 | C | 12 | 0.0110 mg/L |
| 4 | 54906 | 53 | D | 12 | 0.0110 mg/L |
| 5 | 54902 | 50 | D | 12 | 0.0110 mg/L |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 0 neighborhoods score better than county average
- 5 neighborhoods score worse than county average
EPA Violations
- 60 total violations across Oshkosh
- 10 health-based violations
- 5 of 5 ZIP codes have violations
- 0 ZIP codes exceed EPA lead action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Stage 2 DBP Rule | 15 | 5 |
| Lead and Copper Rule | 15 | 5 |
| Contaminant 1011 | 5 | 5 |
| Total Coliform | 5 | 5 |
| Radium-226 | 5 | 5 |
Frequently Asked Questions
What is the safest neighborhood in Oshkosh?
ZIP code 54903 has the highest safety score in Oshkosh at 60/100 (grade C). Check the full report for details.
Is Oshkosh water safe to drink?
Oshkosh 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.