Onslow County, North Carolina
10 ZIP codes · Avg score 81/100 · Grade B · Updated 2026-06-03
In recent assessments, Onslow County's 10 ZIP codes record strong, consistent water safety outcomes.
How Onslow County Compares
How Onslow County Compares
Onslow 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: Onslow 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: 11 (asthma 10.2%, diabetes 8.6%)
Estimated additional annual cost per homeowner: $4,817, driven primarily by sea_level
Infrastructure: 0.271% avg pipe failure probability
33.2% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
→ Stable trendEPA violation counts by year across Onslow County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 14 violations. Past 5 years: 16 total (16 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: $4,817
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
74,530 housing units in Onslow 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 Onslow County
Remediation costs are relatively manageable for most homeowners in Onslow 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 Onslow 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 Onslow County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Onslow Wtr and Sewer Authority | 156,755 | 48 |
| 2 | Raintree/summersill Estates #2 | 1,539 | 40 |
| 3 | City of Jacksonville | 49,093 | 38 |
| 4 | Lauradale S/d | 2,527 | 38 |
| 5 | Old Settlers Water System | 2,677 | 38 |
19 total water systems serve Onslow County.
All ZIP Codes in Onslow County
10 ZIP codes tracked in Onslow County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 28547 | Camp Lejeune | 99 | A | 0 | — |
| 2 | 28542 | Camp Lejeune | 95 | A | 0 | — |
| 3 | 28544 | Midway Park | 87 | A | 0 | $137K |
| 4 | 28574 | Richlands | 84 | B | 2 | $205K |
| 5 | 28503 | Kinston | 82 | B | 10 | — |
| 6 | 28546 | Jacksonville | 79 | B | 19 (4 health) | $212K |
| 7 | 28555 | Maysville | 78 | B | 8 | $147K |
| 8 | 28539 | Hubert | 77 | B | 0 | $207K |
| 9 | 28540 | Jacksonville | 74 | B | 19 (4 health) | $202K |
| 10 | 28460 | Sneads Ferry | 50 | D | 0 | $310K |
Recommended Buyer Guides for Onslow County
Below: editorial picks, no sponsored placements.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Onslow County, North Carolina
Overview
Onslow County in North Carolina covers 10 ZIP codes with an average Home Safety Score of B (81/100).
5 of 10 ZIP codes have recorded EPA violations. 8 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.