Yolo County, California
23 ZIP codes · Avg score 99/100 · Grade A · Updated
ZipCheckup grade for Yolo County: A.
No federal data flags a major home-safety concern for this ZIP.
Yolo County earns a high water safety grade - 23 ZIP codes tracked, virtually all compliant.
How Yolo County Compares
How Yolo County Compares
Yolo County scores 23 points above the California state average (76/100) and 26 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Yolo County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 9.8 (asthma 9.8%, diabetes 9.3%)
Estimated additional annual cost per homeowner: $1,694, driven primarily by flood
62.4% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across Yolo County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 6 violations. Past 5 years: 8 total (8 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
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 DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,694
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
89,186 housing units in Yolo 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 Yolo County
Remediation costs are relatively manageable for most homeowners in Yolo County, representing a small fraction of property value.
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 Yolo County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Yolo County
8 community water systems serving Yolo County.
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Show all 8 water systems
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12 total water systems serve Yolo County.
Systems with the most violations in Yolo County
3 water systems with recorded EPA violations.
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All ZIP Codes in Yolo County
23 ZIP codes tracked in Yolo County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 95616 | Davis | 100 | A | 1 | $857K |
| 2 | 95620 | Dixon | 100 | A | 0 | $595K |
| 3 | 95694 | Winters | 100 | A | 0 | $634K |
| 4 | 95695 | Woodland | 100 | A | 0 | $494K |
| 5 | 95618 | Davis | 99 | A | 3 | $840K |
| 6 | 95776 | Woodland | 99 | A | 3 | $555K |
| 7 | 95605 | West Sacramento | 96 | A | 2 (1 health) | $376K |
| 8 | 95606 | Brooks | — | — | — | |
| 9 | 95607 | Capay | — | — | $479K | |
| 10 | 95612 | Clarksburg | — | — | 0 | $950K |
| 11 | 95617 | Davis | — | — | — | |
| 12 | 95627 | Esparto | — | — | $478K | |
| 13 | 95637 | Guinda | — | — | $1012K | |
| 14 | 95645 | Knights Landing | — | — | $387K | |
| 15 | 95653 | Madison | — | — | $321K | |
| 16 | 95679 | Rumsey | — | — | — | |
| 17 | 95691 | West Sacramento | — | — | 2 (1 health) | $532K |
| 18 | 95697 | Yolo | — | — | — | |
| 19 | 95698 | Zamora | — | — | $961K | |
| 20 | 95798 | West Sacramento | — | — | — | |
| 21 | 95799 | West Sacramento | — | — | — | |
| 22 | 95899 | Sacramento | — | — | — | |
| 23 | 95937 | Dunnigan | — | — | — |
Recommended Buyer Guides for Yolo County
Filtered against EPA monitoring data and CDC lead-exposure guidance, the guides below skip the generic catalog and connect directly to the contaminants and hazards on file here.
- Best Lead Paint Test Kits — 62.4% of homes built before 1978
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Yolo County, California
Overview
Yolo County in California covers 23 tracked ZIP records with an average Home Safety Score of A (99/100) across 7 scored records.
5 of 9 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 1 health-based violation appear in the available health breakdown.
← 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.