San Ysidro, CA: 1 Health Violation - Home Safety 91/100
2 ZIP codes · 2 water systems · Updated
ZipCheckup grade for San Ysidro: A.
Checked records flag no major concern; missing data is unknown.
San Ysidro, CA carries a grade in ZipCheckup's upper tier; any health-based violations on record should be checked per water system.
How San Ysidro Compares
Data: EPA SDWIS
Key Facts for San Ysidro Residents
- Water systems mapped to your city have 1 violation on record since 2021.
- Average of reported 90th-percentile lead results: 0.002 mg/L.
- Estimated remediation: $300 per household.
- Health risk index (ZipCheckup composite of CDC data): 10.18.
San Ysidro's Water Providers
Counting every public water system linked to San Ysidro, CA in federal data gives 2. The list below keeps the 2 largest by reported population served, a figure that covers each system's whole service area rather than the city alone. A household's own supplier is named on its water bill.
- A
- A
Overview
We track home safety data for 2 ZIP codes in San Ysidro, California (population ~26,507), covering 2 community water systems serving approximately 1,491,379 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 2 ZIP codes.
1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. 1 health-based violation appear in the available health breakdown.
Home Safety Score
Average Home Safety Score for San Ysidro: A (91/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
San Ysidro water systems draw from: Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0020 mg/L (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
2 of 2 ZIP records with known zones are in EPA Radon Zone 3.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Revised Total Coliform Rule | Microbiological | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 92173 | A | 1 | 1 | City of San Diego, |
All ZIP Codes in San Ysidro
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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
San Ysidro Community Health Snapshot
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
What's in San Ysidro's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in San Ysidro
How large is the remediation estimate next to home prices in San Ysidro? Small in relative terms: it amounts to 1% of the median value or less, although the dollar figure below is still an estimate and actual costs vary by property and contractor.
Estimated remediation costs in San Ysidro can be compared with local home values. The $150–$600 estimated range can be set against the median property value; actual costs vary by home. Home values are 29% below the California average.
San Ysidro: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Available area-level lead records for San Ysidro do not determine the lead level at an individual tap. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for San Ysidro, CA