Neighborhood Report
Grade C
Potrero, CA Neighborhood Water Quality — Grade C
2 ZIP codes · 40 EPA violations
Data source: EPA SDWIS Last verified: 2026-06-03
Water quality varies significantly across Potrero, CA. We analyzed 2 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 | 100% |
| D | 0 | 0% |
| F | 0 | 0% |
Neighborhood Rankings
Every ZIP code in Potrero ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 91963 | 55 | C | 20 | No data |
| 2 | 91990 | 55 | C | 20 | No data |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 0 neighborhoods score better than county average
- 2 neighborhoods score worse than county average
EPA Violations
- 40 total violations across Potrero
- 32 health-based violations
- 2 of 2 ZIP codes have violations
- 0 ZIP codes exceed EPA lead action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Barium | 36 | 2 |
| Lead | 2 | 2 |
| Stage 1 DBP Rule | 2 | 2 |
Frequently Asked Questions
What is the safest neighborhood in Potrero?
ZIP code 91963 has the highest safety score in Potrero at 55/100 (grade C). Check the full report for details.
Is Potrero water safe to drink?
Potrero 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.