Saint Helena, CA - Home Safety Score unavailable
1 ZIP code · 5 water systems · Updated
Data: EPA SDWIS
What You Should Know About Saint Helena Water
- Your city's water systems recorded 9 violations since 2021.
- Average of reported 90th-percentile lead results: 0.007 mg/L.
- Homes built before 1986: 75% - older plumbing may contain lead solder.
- Estimated remediation: $600 per household.
- Health risk index (ZipCheckup composite of CDC data): 11.55.
Who Supplies Your Water in Saint Helena
Sorted by reported population served, the top 3 of 5 public water systems mapped to Saint Helena, CA appear below, each with its own federal compliance record.
Overview
We track home safety data for 1 ZIP code in Saint Helena, California (population ~7,646), covering 5 community water systems serving approximately 268,784 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.
1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. 8 health-based violations appear in the available health breakdown.
Water Sources
Saint Helena water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0070 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
1 of 1 ZIP records with known zones is 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 |
|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 12 | 1 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 4 | 1 |
| Lead and Copper Rule | Treatment Technique | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 94574 | — | 9 | 8 | City of St. Helena, |
All ZIP Codes in Saint Helena
- 94574 - 9 violations ⚠
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.
Health Outcomes in Saint Helena
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
Top Contaminants in Saint Helena Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Saint Helena
With 75% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
If you live in one of the pre-1986 homes in Saint Helena, a certified lab test for lead is the direct way to learn what your tap delivers; the median build year of 1962 is only context.
Over half of homes in Saint Helena were built before 1986, when federal law began restricting lead solder in drinking-water plumbing. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Saint Helena Homeowners
In Saint Helena, estimated remediation comes to 1% or less of the median home value.
Estimated remediation costs in Saint Helena can be compared with local home values. The $300–$1,500 estimated range can be set against the median property value; actual costs vary by home. Home values are 154% above the California average.
Lead Exposure Risk for Children in Saint Helena
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.
If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical NFIP Claim Context in Saint Helena
Historical NFIP data for Saint Helena contains 111 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $39,029. Among ZIP codes with claim records, 100% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The $600 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
Deep Dive Reports
Detailed analysis for Saint Helena, CA