Northampton County, Virginia
20 ZIP codes · Avg score 75/100 · Grade B · Updated 2026-06-03
Northampton County maintains reliable drinking water quality across all 20 of its tracked ZIP codes.
How Northampton County Compares
How Northampton County Compares
Northampton County scores 9 points above the Virginia state average (66/100) and 7 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Northampton 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 (asthma 11.1%, diabetes 18.1%)
Estimated additional annual cost per homeowner: $3,150, driven primarily by sea_level
Infrastructure: 0.332% avg pipe failure probability, 31% of ZIPs at high risk
54.4% 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: $3,150
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
13,436 housing units in Northampton 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 Northampton County
Remediation costs are relatively manageable for most homeowners in Northampton 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 Northampton 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 Northampton County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | HOLIDAY ACRES MOBILE HOME PARK | 80 | 14 |
| 2 | EXMORE, TOWN OF | 2,000 | 8 |
| 3 | Stanley Mobile Home Park - South | 40 | 8 |
| 4 | Stanley Mobile Home Park - North | 27 | 8 |
| 5 | Bayview | 160 | 3 |
10 total water systems serve Northampton County.
All ZIP Codes in Northampton County
20 ZIP codes tracked in Northampton County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 23405 | Machipongo | 94 | A | 14 (1 health) | $343K |
| 2 | 23350 | Exmore | 91 | A | 8 | $180K |
| 3 | 23310 | Cape Charles | 90 | A | 1 | $345K |
| 4 | 23347 | Eastville | 89 | A | 3 | — |
| 5 | 23306 | Belle Haven | 73 | B | 0 | $284K |
| 6 | 23307 | Birdsnest | 73 | B | 0 | $146K |
| 7 | 23341 | Craddockville | 73 | B | 0 | — |
| 8 | 23354 | Franktown | 73 | B | 0 | $493K |
| 9 | 23398 | Jamesville | 73 | B | 0 | — |
| 10 | 23408 | Marionville | 73 | B | 0 | — |
| 11 | 23413 | Nassawadox | 73 | B | 0 | — |
| 12 | 23419 | Oyster | 73 | B | 0 | — |
| 13 | 23443 | Townsend | 73 | B | 0 | — |
| 14 | 23482 | Wardtown | 73 | B | 0 | — |
| 15 | 23836 | Chester | 73 | B | 0 | $339K |
| 16 | 23313 | Capeville | 66 | C | 0 | — |
| 17 | 23345 | Davis Wharf | 66 | C | 0 | — |
| 18 | 23429 | Seaview | 66 | C | 0 | — |
| 19 | 23316 | Cheriton | 65 | C | 0 | $219K |
| 20 | 23486 | Willis Wharf | 65 | C | 0 | — |
Recommended Buyer Guides for Northampton County
Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- Best Lead Paint Test Kits — 54.4% of homes built before 1978
Deep Dive Reports
Detailed analysis for Northampton County, Virginia
Overview
Northampton County in Virginia covers 20 ZIP codes with an average Home Safety Score of B (75/100).
4 of 20 ZIP codes have recorded EPA violations. 1 health-based violation 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.