Walnut Creek, CA Home Safety: Home Safety Score unavailable
4 ZIP codes · 2 water systems · Updated
Data: EPA SDWIS
Key Facts for Walnut Creek Residents
- Average lead level: 0.0023 mg/L.
- Homes built before 1986: 75% - older plumbing may contain lead solder.
- Estimated remediation: $2,100 per household.
- CDC health risk index: 10.72.
Walnut Creek's Water Providers
At present, 2 utilities serve the bulk of Walnut Creek, CA's residential water connections out of 2 systems active in the area, spread across independent providers with separate infrastructure and compliance obligations.
Overview
We track home safety data for 4 ZIP codes in Walnut Creek, California (population ~91,171), covering 2 community water systems serving approximately 1,640,800 people region-wide. The EPA snapshots used for this build directly map water systems to 4 of 4 ZIP codes.
The available EPA record reports 0 violations for 4 ZIP codes with a reported violation count.
Water Sources
Walnut Creek water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0023 mg/L (EPA action level: 0.015 mg/L)
- 0 of 4 ZIP codes with known status exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 4 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 94595 | — | East Bay Municipal Utility District | 1,442,800 |
| 94596 | — | East Bay Municipal Utility District | 1,442,800 |
| 94597 | — | Contra Costa Water District | 198,000 |
| 94598 | — | Contra Costa Water District | 198,000 |
All ZIP Codes in Walnut Creek
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.
Walnut Creek 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
Walnut Creek Infrastructure Age
With 75% 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
When more than half a city's housing predates the 1986 federal ban on lead solder, plumbing-era lead risk becomes a citywide concern rather than an exception. Walnut Creek's median build year of 1975 places it squarely in that category.
Over half of homes in Walnut Creek 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 Walnut Creek
At current valuations, Walnut Creek sits in the low remediation-share tier - the equity impact of fixing documented issues is proportionally minor.
Remediation costs in Walnut Creek are relatively low compared to home values. The $1,100–$3,400 estimated range is a small fraction of median property value. Home values are 69% above the California average.
Walnut Creek: 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.
After the federal action removing lead-bearing solder from new plumbing took effect, building practice shifted - but 75% of the Walnut Creek inventory predates that line. With aggregate samples near or beyond 0.015 mg/L, an in-home check moves out of the optional column into the standard list.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Walnut Creek: NFIP Claim Records and Water-Quality Context
Historical NFIP data for Walnut Creek contains 180 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $18,832. Among ZIP codes with claim records, 75% 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 <strong>$2,100</strong> 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 Walnut Creek, CA