Accomack County, Virginia
37 ZIP codes · Avg score 71/100 · Grade B · Updated 2026-06-03
Covering 37 ZIP codes, Accomack County earns a high grade for tap water — most systems report zero health-based violations, and the overall compliance rate comfortably exceeds federal benchmarks.
How Accomack County Compares
How Accomack County Compares
Accomack County scores 5 points above the Virginia state average (66/100) and 3 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Accomack County, Virginia
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16.5 (asthma 11.6%, diabetes 18.2%)
Estimated additional annual cost per homeowner: $4,261, driven primarily by sea_level
Infrastructure: 0.35% avg pipe failure probability, 27% of ZIPs at high risk
64.1% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Accomack County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 55 violations. Past 5 years: 78 total (78 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
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $4,261
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
21,217 housing units in Accomack 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 Accomack County
Remediation costs are relatively manageable for most homeowners in Accomack 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 Accomack 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 Accomack County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | ONANCOCK, TOWN OF | 1,525 | 12 |
| 2 | NASA WALLOPS FLIGHT FACILITY | 1,625 | 8 |
| 3 | PARKSLEY, TOWN OF | 804 | 7 |
| 4 | Tangier, Town of | 393 | 7 |
| 5 | Rolling Acres Subdivision | 170 | 5 |
10 total water systems serve Accomack County.
All ZIP Codes in Accomack County
37 ZIP codes tracked in Accomack County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 23395 | Horntown | 99 | A | 0 | $138K |
| 2 | 23441 | Tasley | 89 | A | 1 | — |
| 3 | 23423 | Quinby | 87 | A | 0 | $117K |
| 4 | 23337 | Wallops Island | 85 | A | 8 (8 health) | $193K |
| 5 | 23440 | Tangier | 84 | B | 7 (1 health) | $136K |
| 6 | 23417 | Onancock | 78 | B | 5 | $251K |
| 7 | 23303 | Atlantic | 73 | B | 0 | $264K |
| 8 | 23357 | Greenbush | 73 | B | 0 | $207K |
| 9 | 23359 | Hallwood | 73 | B | 0 | — |
| 10 | 23404 | Locustville | 73 | B | 0 | — |
| 11 | 23410 | Melfa | 73 | B | 0 | $198K |
| 12 | 23412 | Modest Town | 73 | B | 0 | — |
| 13 | 23415 | New Church | 73 | B | 0 | $166K |
| 14 | 23416 | Oak Hall | 73 | B | 0 | $10K ⚠ |
| 15 | 23418 | Onley | 73 | B | 0 | $250K |
| 16 | 23421 | Parksley | 73 | B | 2 | $205K |
| 17 | 23442 | Temperanceville | 73 | B | 0 | $120K |
| 18 | 23488 | Withams | 73 | B | 0 | — |
| 19 | 23302 | Assawoman | 66 | C | 0 | — |
| 20 | 23396 | Oak Hall | 66 | C | 0 | — |
| 21 | 23399 | Jenkins Bridge | 66 | C | 0 | — |
| 22 | 23401 | Keller | 66 | C | 0 | — |
| 23 | 23407 | Mappsville | 66 | C | 0 | $134K |
| 24 | 23414 | Nelsonia | 66 | C | 0 | — |
| 25 | 23483 | Wattsville | 66 | C | 0 | — |
| 26 | 23301 | Accomac | 65 | C | 0 | $262K |
| 27 | 23308 | Bloxom | 65 | C | 0 | $114K |
| 28 | 23356 | Greenbackville | 65 | C | 0 | $227K |
| 29 | 23358 | Hacksneck | 65 | C | 0 | — |
| 30 | 23389 | Harborton | 65 | C | 0 | — |
| 31 | 23409 | Mears | 65 | C | 0 | $138K |
| 32 | 23420 | Painter | 65 | C | 0 | $142K |
| 33 | 23422 | Pungoteague | 65 | C | 0 | — |
| 34 | 23426 | Sanford | 65 | C | 0 | — |
| 35 | 23427 | Saxis | 65 | C | 0 | $89K |
| 36 | 23480 | Wachapreague | 65 | C | 0 | $192K |
| 37 | 23336 | Chincoteague Island | 55 | C | 0 | $326K |
Recommended Buyer Guides for Accomack 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 — 64.1% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Accomack County, Virginia
Overview
Accomack County in Virginia covers 37 ZIP codes with an average Home Safety Score of B (71/100).
5 of 37 ZIP codes have recorded EPA violations. 9 health-based violations have been documented.
← 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.