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2026 Rankings

Delaware County, Pennsylvania Home Safety Rankings - 34 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.

Delaware County, Pennsylvania (Pennsylvania) includes 34 tracked ZIP codes and 8 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: D (54/100)

Grade	ZIP Codes	%
A	0	0%
B	0	0%
C	7	50%
D	6	43%
F	1	7%

Top 10 ZIP Codes by Home Safety Score

Rank	ZIP	City	Score	Grade
1	17113	Harrisburg	66	C
2	17101	Harrisburg	64	C
3	17102	Harrisburg	64	C
4	17103	Harrisburg	64	C
5	17104	Harrisburg	64	C
6	17110	Harrisburg	64	C
7	17093	Summerdale	49	D
8	17112	Harrisburg	49	D
9	17109	Harrisburg	47	D

10 Riskiest ZIP Codes

Rank	ZIP	City	Score	Grade	Risk Factor
1	19342	Glen Mills	39	F	31 violations
2	19373	Thornton	40	D	30 violations
3	19319	Cheyney	40	D	30 violations
4	17111	Harrisburg	47	D	10 violations
5	17109	Harrisburg	47	D	10 violations
6	17112	Harrisburg	49	D	3 violation(s)
7	17093	Summerdale	49	D	2 violation(s)
8	17110	Harrisburg	64	C	10 violations
9	17104	Harrisburg	64	C	10 violations

Most Common Contaminant Violations

Contaminant	Violations	ZIPs Affected
Consumer Confidence Report Rule	21	11
Fecal Coliform	14	10
E. coli	11	11
Total Trihalomethanes (TTHM)	9	9
Haloacetic Acids (HAA5)	9	9
2,3,7,8-TCDD	8	8
Revised Total Coliform Rule	8	8
Barium	6	3

Lead Risk

Average of reported 90th-percentile lead results: 0.0032 mg/L (below EPA action level)
0 of 14 ZIP codes with known status exceed EPA lead action level
26% of housing built before 1950
50% of housing built before 1970

Cities in This Metro

Harrisburg, PA — 26 ZIP codes
Concordville, PA — 3 ZIP codes
Dauphin, PA — 1 ZIP code
Summerdale, PA — 1 ZIP code
Cheyney, PA — 1 ZIP code
Glen Mills, PA — 1 ZIP code
Thornton, PA — 1 ZIP code

All 34 ZIP Codes Ranked

View complete ranking

Rank	ZIP	City	Score	Grade	Violations
1	17113	Harrisburg	66	C	3
2	17101	Harrisburg	64	C	7
3	17102	Harrisburg	64	C	7
4	17103	Harrisburg	64	C	7
5	17104	Harrisburg	64	C	10
6	17110	Harrisburg	64	C	10
7	17093	Summerdale	49	D	2
8	17112	Harrisburg	49	D	3
9	17109	Harrisburg	47	D	10
10	17111	Harrisburg	47	D	10
11	19319	Cheyney	40	D	30
12	19373	Thornton	40	D	30
13	19342	Glen Mills	39	F	31
14	17018	Dauphin	—	—	—

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). Delaware County, Pennsylvania Home Safety Rankings - 34 ZIPs. https://zipcheckup.com/rankings/metro/delaware-pennsylvania/

BibTeX

@misc{zipcheckup-rankings-metro-delaware-pennsylvania,
  author = {{ZipCheckup}},
  title  = {{Delaware County, Pennsylvania Home Safety Rankings - 34 ZIPs}},
  year   = {2026},
  url    = {https://zipcheckup.com/rankings/metro/delaware-pennsylvania/}
}

Page version: October 2026.

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