Neighborhood Report
Grade B
San Luis Obispo, CA Neighborhood Water Quality — Grade B
8 ZIP codes · 16 EPA violations
Data source: EPA SDWIS Last verified: 2026-06-04
Water quality varies significantly across San Luis Obispo, CA. We analyzed 8 ZIP codes to help you compare neighborhoods by water safety, lead risk, and EPA compliance.
City Overview: Grade B (80/100)
| Grade | Neighborhoods | % |
|---|---|---|
| A | 0 | 0% |
| B | 8 | 100% |
| C | 0 | 0% |
| D | 0 | 0% |
| F | 0 | 0% |
Neighborhood Rankings
Every ZIP code in San Luis Obispo ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 93403 | 82 | B | 2 | 0.0011 mg/L |
| 2 | 93406 | 82 | B | 2 | 0.0011 mg/L |
| 3 | 93407 | 82 | B | 2 | 0.0011 mg/L |
| 4 | 93408 | 82 | B | 2 | 0.0011 mg/L |
| 5 | 93409 | 82 | B | 2 | 0.0011 mg/L |
| 6 | 93410 | 82 | B | 2 | 0.0011 mg/L |
| 7 | 93401 | 72 | B | 2 | 0.0011 mg/L |
| 8 | 93405 | 72 | B | 2 | 0.0011 mg/L |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 8 neighborhoods score better than county average
- 0 neighborhoods score worse than county average
EPA Violations
- 16 total violations across San Luis Obispo
- 8 health-based violations
- 8 of 8 ZIP codes have violations
- 0 ZIP codes exceed EPA lead action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Consumer Confidence Report Rule | 8 | 8 |
| E. coli | 8 | 8 |
Frequently Asked Questions
What is the safest neighborhood in San Luis Obispo?
ZIP code 93403 has the highest safety score in San Luis Obispo at 82/100 (grade B). Check the full report for details.
Is San Luis Obispo water safe to drink?
San Luis Obispo has an average water safety score of 80/100 (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.