Potrero, CA: 32 Health Violations — 55/100 (2026)
2 ZIP codes · 1 water system · Updated 2026-06-03
Water monitoring across Potrero paints a mid-range picture within CA — solid compliance in some service zones, documented concerns in others. Most violations on record are concentrated in specific areas, and the overall grade has held in the middle tier without major shifts in recent monitoring cycles.
How Potrero Compares
Data: EPA SDWIS Last verified: 2026-06-03
Potrero Water: The Quick Version
- Your city's water systems recorded 40 violations in the past 5 years.
- Estimated remediation: $900 per household.
- CDC health risk index: 10.18.
Water Systems Serving Potrero
While 1 water system appear in federal records for Potrero, CA, one provider supplies the majority of residential connections — making it the central point of infrastructure and compliance accountability for most households.
Overview
We track water quality and home safety data for 2 ZIP codes in Potrero, California, covering 1 community water system serving approximately 617 people.
2 of 2 ZIP codes (100%) have recorded EPA violations. 32 health-based violations documented.
Home Safety Score
Average Home Safety Score for Potrero: C (55/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Potrero water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Potrero
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 2 ZIP codes
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Barium | Inorganic | 54 | 2 |
| Lead | Inorganic | 3 | 2 |
| Stage 1 DBP Rule | Treatment Technique | 3 | 2 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 91963 | C | 20 | 16 | Twin Lakes Resort |
| 91990 | C | 20 | 16 | Twin Lakes Resort |
All ZIP Codes in Potrero
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
CDC Health Data for Potrero
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Potrero
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
What You Can Do in Potrero
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. Filters rated for Barium can reduce the most common contaminant found in Potrero's water.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Potrero, CA