Contra Costa County, California
51 ZIP codes · Home Safety Score unavailable · 0 of 51 tracked ZIP records scored
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData
ZIP Code Risk Map
Water Quality Map: Contra Costa County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 10.7 (asthma 9.4%, diabetes 11.3%)
Modeled additional annual cost estimate per homeowner: $2,625, largest modeled factor: Sea Level
54% of homes built before 1980 (lead paint was banned for residential use in 1978)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $2,625
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
420,819 housing units in Contra Costa County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Contra Costa County
Modeled remediation costs in Contra Costa County can be compared with the median property value; actual costs vary by property.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Contra Costa County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems mapped to Contra Costa County ZIP codes
8 community water systems mapped to Contra Costa County ZIP codes; EPA may list more systems serving the county.
Show all 8 water systems
13 water systems mapped to Contra Costa County ZIP codes in our data; EPA may list more systems serving the county.
All ZIP Codes in Contra Costa County
51 ZIP codes tracked in Contra Costa County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 94505 | Discovery Bay | — | — | 0 | $788K |
| 2 | 94506 | Danville | — | — | 0 | $1790K |
| 3 | 94507 | Alamo | — | — | 0 | $2000K |
| 4 | 94509 | Antioch | — | — | 0 | $565K |
| 5 | 94511 | Bethel Island | — | — | 0 | $550K |
| 6 | 94513 | Brentwood | — | — | 0 | $794K |
| 7 | 94514 | Byron | — | — | 0 | $853K |
| 8 | 94516 | Canyon | — | — | 0 | $787K |
| 9 | 94517 | Clayton | — | — | 0 | $996K |
| 10 | 94518 | Concord | — | — | 0 | $827K |
| 11 | 94519 | Concord | — | — | 0 | $728K |
| 12 | 94520 | Concord | — | — | 0 | $572K |
| 13 | 94521 | Concord | — | — | 0 | $823K |
| 14 | 94523 | Pleasant Hill | — | — | 0 | $1038K |
| 15 | 94524 | Concord | — | — | — | |
| 16 | 94525 | Crockett | — | — | 0 | $709K |
| 17 | 94526 | Danville | — | — | 0 | $1588K |
| 18 | 94527 | Concord | — | — | — | |
| 19 | 94528 | Diablo | — | — | 0 | $2000K |
| 20 | 94529 | Concord | — | — | — | |
| 21 | 94530 | El Cerrito | — | — | 0 | $1097K |
| 22 | 94531 | Antioch | — | — | 0 | $660K |
| 23 | 94547 | Hercules | — | — | 0 | $741K |
| 24 | 94548 | Knightsen | — | — | 0 | $918K |
| 25 | 94549 | Lafayette | — | — | 0 | $1969K |
| 26 | 94553 | Martinez | — | — | 0 | $781K |
| 27 | 94561 | Oakley | — | — | 0 | $632K |
| 28 | 94563 | Orinda | — | — | 0 | $1810K |
| 29 | 94564 | Pinole | — | — | 0 | $697K |
| 30 | 94565 | Pittsburg | — | — | 0 | $563K |
| 31 | 94569 | Port Costa | — | — | 0 | $587K |
| 32 | 94570 | Moraga | — | — | — | |
| 33 | 94572 | Rodeo | — | — | 0 | $654K |
| 34 | 94575 | Moraga | — | — | 0 | — |
| 35 | 94582 | San Ramon | — | — | 0 | $1544K |
| 36 | 94583 | San Ramon | — | — | 0 | $1234K |
| 37 | 94595 | Walnut Creek | — | — | 0 | $817K |
| 38 | 94596 | Walnut Creek | — | — | 0 | $1245K |
| 39 | 94597 | Walnut Creek | — | — | 0 | $987K |
| 40 | 94598 | Walnut Creek | — | — | 0 | $1307K |
| 41 | 94708 | Berkeley | — | — | 0 | $1517K |
| 42 | 94801 | Richmond | — | — | 0 | $594K |
| 43 | 94802 | Richmond | — | — | — | |
| 44 | 94803 | El Sobrante | — | — | 0 | $729K |
| 45 | 94804 | Richmond | — | — | 0 | $618K |
| 46 | 94805 | Richmond | — | — | 0 | $739K |
| 47 | 94806 | San Pablo | — | — | 0 | $582K |
| 48 | 94807 | Richmond | — | — | — | |
| 49 | 94808 | Richmond | — | — | — | |
| 50 | 94820 | El Sobrante | — | — | — | |
| 51 | 94850 | Richmond | — | — | — |
Recommended Buyer Guides for Contra Costa County
Up to five guides, picked by rule.
- Best Lead Paint Test Kits — 54% of homes built before 1980
Deep Dive Reports
Detailed analysis for Contra Costa County, California
Overview
Contra Costa County in California covers 51 tracked ZIP records. No Home Safety Score is published because the required model evidence is incomplete for every tracked record; missing evidence is not treated as zero.
The available EPA record reports 0 violations for 42 ZIP codes with a reported violation count.
← Back to California Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.