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2026 Rankings

New Castle County, Delaware Home Safety Rankings - 26 ZIPs

Explore rankings under Home Safety Score model 4.0.0. Only ZIPs with all four required inputs are ranked; missing evidence is not imputed or reweighted.

New Castle County, Delaware (Delaware) includes 26 tracked ZIP codes and 4 mapped community water systems; confirm service for a specific address. Below are the water quality rankings for metro ZIPs with all required inputs.

Average Home Safety Grade: C (68/100)

Grade	ZIP Codes	%
A	0	0%
B	1	10%
C	9	90%
D	0	0%
F	0	0%

Top 10 ZIP Codes by Home Safety Score

Rank	ZIP	City	Score	Grade
1	19807	Wilmington	83	B
2	19808	Wilmington	67	C
3	19801	Wilmington	66	C
4	19802	Wilmington	66	C
5	19803	Wilmington	66	C
6	19804	Wilmington	66	C
7	19805	Wilmington	66	C
8	19806	Wilmington	66	C
9	19809	Wilmington	66	C
10	19810	Wilmington	66	C

10 Riskiest ZIP Codes

Rank	ZIP	City	Score	Grade	Risk Factor
1	19810	Wilmington	66	C	1 violation(s)
2	19809	Wilmington	66	C	1 violation(s)
3	19806	Wilmington	66	C	1 violation(s)
4	19805	Wilmington	66	C	1 violation(s)
5	19804	Wilmington	66	C	1 violation(s)
6	19803	Wilmington	66	C	1 violation(s)
7	19802	Wilmington	66	C	1 violation(s)
8	19801	Wilmington	66	C	1 violation(s)
9	19808	Wilmington	67	C	—
10	19807	Wilmington	83	B	2 violation(s)

Most Common Contaminant Violations

Contaminant	Violations	ZIPs Affected
Consumer Confidence Report Rule	9	9
Stage 1 DBP Rule	1	1

Lead Risk

Average of reported 90th-percentile lead results: 0.0024 mg/L (below EPA action level)
0 of 10 ZIP codes with known status exceed EPA lead action level
31% of housing built before 1950
69% of housing built before 1970

Cities in This Metro

Wilmington, DE — 26 ZIP codes

All 26 ZIP Codes Ranked

View complete ranking

Rank	ZIP	City	Score	Grade	Violations
1	19807	Wilmington	83	B	2
2	19808	Wilmington	67	C	0
3	19801	Wilmington	66	C	1
4	19802	Wilmington	66	C	1
5	19803	Wilmington	66	C	1
6	19804	Wilmington	66	C	1
7	19805	Wilmington	66	C	1
8	19806	Wilmington	66	C	1
9	19809	Wilmington	66	C	1
10	19810	Wilmington	66	C	1

Data Sources

Water quality: EPA SDWIS
Housing: U.S. Census Bureau American Community Survey
Flood: FEMA NFIP
Flood scope: historical NFIP claim records and claim-rated-zone evidence; this is not current property-map coverage.

Reporting periods vary by source; the page metadata identifies this materialization.

Methodology
Model 4.0.0 averages SDWIS water compliance and UCMR5 PFAS within drinking water, then averages drinking water, county radon, and annual AQI as three equal domains. All four inputs are required. Score methodology → · Rankings methodology →

Disclaimer: Scores are based on EPA SDWIS reported data and are not a guarantee of current water safety. Water quality can change. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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How to cite this page

APA

ZipCheckup. (2026). New Castle County, Delaware Home Safety Rankings - 26 ZIPs. https://zipcheckup.com/rankings/metro/new-castle-delaware/

BibTeX

@misc{zipcheckup-rankings-metro-new-castle-delaware,
  author = {{ZipCheckup}},
  title  = {{New Castle County, Delaware Home Safety Rankings - 26 ZIPs}},
  year   = {2026},
  url    = {https://zipcheckup.com/rankings/metro/new-castle-delaware/}
}

Page version: October 2026.

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