Duplin County, North Carolina
11 ZIP codes · Avg score 81/100 · Grade B · Updated 2026-06-03
Within Duplin County's 11 tracked ZIP codes, safety indicators remain above the national average with few health-based violations on record.
How Duplin County Compares
How Duplin County Compares
Duplin County scores 8 points above the North Carolina state average (73/100) and 13 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Duplin County, North Carolina
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.2 (asthma 11.2%, diabetes 15.5%)
Estimated additional annual cost per homeowner: $2,360, driven primarily by sea_level
Infrastructure: 0.349% avg pipe failure probability, 18% of ZIPs at high risk
52% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Duplin County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 11 violations. Past 5 years: 18 total (18 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: $2,360
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
21,839 housing units in Duplin 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 Duplin County
Water safety remediation is a moderate expense relative to home values. Most homeowners can address issues through staged improvements over time.
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 Duplin 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 Duplin County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Duplin County Water System | 18,542 | 41 |
| 2 | Chinquapin Water Association | 4,686 | 13 |
| 3 | Calypso, Town of | 660 | 12 |
| 4 | Teachey, Town of | 663 | 12 |
| 5 | Wallace, Town of | 5,825 | 12 |
20 total water systems serve Duplin County.
All ZIP Codes in Duplin County
11 ZIP codes tracked in Duplin County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 28464 | Teachey | 94 | A | 3 | $175K |
| 2 | 28521 | Chinquapin | 90 | A | 0 | $106K |
| 3 | 28325 | Calypso | 86 | A | 6 (1 health) | $100K |
| 4 | 28341 | Faison | 86 | A | 6 (1 health) | $120K |
| 5 | 28453 | Magnolia | 86 | A | 6 (2 health) | $109K |
| 6 | 28349 | Kenansville | 85 | A | 5 | $107K |
| 7 | 28398 | Warsaw | 85 | A | 0 | $86K |
| 8 | 28572 | Pink Hill | 83 | B | 2 | $121K |
| 9 | 28518 | Beulaville | 76 | B | 4 (1 health) | $163K |
| 10 | 28508 | Albertson | 66 | C | 0 | $48K |
| 11 | 28466 | Wallace | 54 | D | 9 (1 health) | $180K |
Recommended Buyer Guides for Duplin County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Lead Paint Test Kits — 52% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Duplin County, North Carolina
Overview
Duplin County in North Carolina covers 11 ZIP codes with an average Home Safety Score of B (81/100).
8 of 11 ZIP codes have recorded EPA violations. 6 health-based violations have been documented.
← Back to North Carolina 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.