Mount Hamilton, CA - Home Safety Score unavailable
1 ZIP code · 2 water systems · Updated
Data: EPA SDWIS
Key Facts for Mount Hamilton Residents
- Your city's water systems recorded 1 violation in the past 5 years.
- Average lead level: 0.0007 mg/L.
- Homes built before 1986: 68% - older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
- CDC health risk index: 9.01.
Mount Hamilton's Water Providers
Multiple utilities divide Mount Hamilton, CA's water service - 2 leading providers among 2 on the federal register.
Overview
We track home safety data for 1 ZIP code in Mount Hamilton, California (population ~41), covering 2 community water systems serving approximately 1,040,220 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. 1 health-based violation appear in the available health breakdown.
Water Sources
Mount Hamilton water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0007 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
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| E. coli | Microbiological | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 95140 | — | 1 | 1 | San Jose Water |
All ZIP Codes in Mount Hamilton
- 95140 - 1 violation ⚠
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.
Mount Hamilton Community Health Snapshot
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
What's in Mount Hamilton's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Mount Hamilton Infrastructure Age
With 68% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Pre-1986 plumbing is not a rare legacy case in Mount Hamilton - it's the dominant profile. The median build year of 1987 indicates a housing stock where lead-soldered copper joints are a common structural feature of residences across the city.
Over half of homes in Mount Hamilton were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in Mount Hamilton
Equity impact data for Mount Hamilton lands in the favorable tier - remediation claims a small slice of what properties here are worth.
Remediation costs in Mount Hamilton are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 171% above the California average.
Mount Hamilton: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Despite citywide averages serving as the standard public reference point, those aggregates cannot resolve what is happening at one specific faucet - and where 68% of Mount Hamilton homes come from before the solder rule or where utility samples sit at or above the action mark, the gap between system data and faucet reality matters more than it does in lower-exposure communities. An in-home draw closes that gap, with certified filtration through retailer networks available where confirmed faucet results warrant additional measures.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Mount Hamilton, CA