King William County, Virginia
3 ZIP codes · Avg score 84/100 · Grade B · Updated 2026-07-19
ZipCheckup grade for King William: B.
This ZIP looks solid, with a few items worth a quick check.
King William County maintains reliable drinking water quality across all 3 of its tracked ZIP codes.
How King William County Compares
How King William County Compares
King William County scores 18 points above the Virginia state average (66/100) and 16 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-19
Key Risk Factors
Health risk index: 13 (asthma 10.9%, diabetes 12.2%)
Estimated additional annual cost per homeowner: $4,050, driven primarily by sea_level
Infrastructure: 0.313% avg pipe failure probability
48.3% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $4,050
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
4,469 housing units in King William 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 King William County
Remediation costs are relatively manageable for most homeowners in King William 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 King William County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving King William County
5 community water systems serving King William County.
- A
- B
- A
- A
- A
Systems with the most violations in King William County
1 water system with recorded EPA violations.
- A
All ZIP Codes in King William County
3 ZIP codes tracked in King William County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 23086 | King William | 95 | A | 0 | $291K |
| 2 | 23181 | West Point | 85 | A | 1 | $266K |
| 3 | 23106 | Manquin | 73 | B | 0 | $268K |
Recommended Buyer Guides for King William County
If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations - federal data drives the order, not retailer arrangements.
- Best Water Testing Kits — Baseline water quality check for your ZIP
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant peace of mind
Overview
King William County in Virginia covers 3 ZIP codes with an average Home Safety Score of B (84/100).
1 of 3 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Virginia water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.