Frederick County, Virginia
6 ZIP codes · Avg score 59/100 · Grade C · Updated 2026-06-03
The systems supplying Frederick County's 6 ZIP codes vary in performance — most meet minimum standards, but violations in select areas are on record.
How Frederick County Compares
How Frederick County Compares
Frederick County scores 7 points below the Virginia state average (66/100) and 9 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Frederick County, Virginia
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13 (asthma 10.3%, diabetes 12%)
Estimated additional annual cost per homeowner: $2,673, driven primarily by sea_level
Infrastructure: 0.307% avg pipe failure probability, 17% of ZIPs at high risk
42.2% 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: $2,673
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
45,590 housing units in Frederick 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 Frederick County
Remediation costs are relatively manageable for most homeowners in Frederick 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 Frederick County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Frederick County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Frederick Water | 46,206 | 11 |
| 2 | City of Winchester, | 28,248 | 11 |
| 3 | Tavenner Park | 228 | 9 |
| 4 | Grafton School | 123 | 9 |
| 5 | Stephens City, Town of | 1,967 | 5 |
8 total water systems serve Frederick County.
All ZIP Codes in Frederick County
6 ZIP codes tracked in Frederick County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 22601 | Winchester | 62 | C | 3 | $322K |
| 2 | 22602 | Winchester | 62 | C | 3 | $351K |
| 3 | 22603 | Winchester | 62 | C | 3 | $332K |
| 4 | 22655 | Stephens City | 61 | C | 2 | $353K |
| 5 | 22663 | White Post | 53 | D | 0 | $412K |
| 6 | 23024 | Bumpass | 53 | D | 0 | $330K |
Recommended Buyer Guides for Frederick County
Editorial-only picks, screened against the EPA detections on file.
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Frederick County, Virginia
Overview
Frederick County in Virginia covers 6 ZIP codes with an average Home Safety Score of C (59/100).
4 of 6 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.