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2026 Rankings

Montgomery 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.

Montgomery County, Pennsylvania (Pennsylvania) includes 34 tracked ZIP codes and 22 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 (43/100)

Grade	ZIP Codes	%
A	0	0%
B	0	0%
C	0	0%
D	13	76%
F	4	24%

Top 10 ZIP Codes by Home Safety Score

Rank	ZIP	City	Score	Grade
1	19438	Harleysville	50	D
2	19468	Royersford	48	D
3	19473	Schwenksville	48	D
4	19492	Zieglerville	48	D
5	19525	Gilbertsville	48	D
6	18074	Perkiomenville	47	D
7	18915	Colmar	47	D
8	19437	Gwynedd Valley	47	D
9	19477	Spring House	47	D
10	18932	Line Lexington	46	D

10 Riskiest ZIP Codes

Rank	ZIP	City	Score	Grade	Risk Factor
1	19426	Collegeville	33	F	881 violations
2	18070	Palm	33	F	213 violations
3	18041	East Greenville	33	F	314 violations
4	19440	Hatfield	38	F	Lead above EPA action level
5	19355	Malvern	40	D	30 violations
6	18969	Telford	43	D	22 violations
7	18964	Souderton	43	D	22 violations
8	18932	Line Lexington	46	D	14 violations
9	19477	Spring House	47	D	11 violations
10	19437	Gwynedd Valley	47	D	11 violations

Most Common Contaminant Violations

Contaminant	Violations	ZIPs Affected
Lead and Copper Rule	261	10
Groundwater Rule	68	16
Di(2-ethylhexyl) adipate	37	4
Simazine	37	4
Atrazine	37	4
Benzene	37	4
Benzo(a)pyrene	37	4
Endrin	34	4

Lead Risk

Average of reported 90th-percentile lead results: 0.0038 mg/L (below EPA action level)
1 of 19 ZIP codes with known status exceed EPA lead action level
13% of housing built before 1950
30% of housing built before 1970

Cities in This Metro

Harleysville, PA — 2 ZIP codes
East Greenville, PA — 1 ZIP code
Green Lane, PA — 1 ZIP code
Palm, PA — 1 ZIP code
Perkiomenville, PA — 1 ZIP code
Sumneytown, PA — 1 ZIP code
Colmar, PA — 1 ZIP code
Earlington, PA — 1 ZIP code
Franconia, PA — 1 ZIP code
Line Lexington, PA — 1 ZIP code
Salford, PA — 1 ZIP code
Salfordville, PA — 1 ZIP code
Souderton, PA — 1 ZIP code
Telford, PA — 1 ZIP code
Tylersport, PA — 1 ZIP code
Woxall, PA — 1 ZIP code
Lionville, PA — 1 ZIP code
Malvern, PA — 1 ZIP code
Blue Bell, PA — 1 ZIP code
Collegeville, PA — 1 ZIP code
Creamery, PA — 1 ZIP code
Devault, PA — 1 ZIP code
Frederick, PA — 1 ZIP code
Gwynedd Valley, PA — 1 ZIP code
Hatfield, PA — 1 ZIP code
Royersford, PA — 1 ZIP code
Sassamansville, PA — 1 ZIP code
Schwenksville, PA — 1 ZIP code
Spring House, PA — 1 ZIP code
Spring Mount, PA — 1 ZIP code

...and 3 more cities

All 34 ZIP Codes Ranked

View complete ranking

Rank	ZIP	City	Score	Grade	Violations
1	19438	Harleysville	50	D	0
2	19468	Royersford	48	D	7
3	19473	Schwenksville	48	D	9
4	19492	Zieglerville	48	D	8
5	19525	Gilbertsville	48	D	7
6	18074	Perkiomenville	47	D	10
7	18915	Colmar	47	D	11
8	19437	Gwynedd Valley	47	D	11
9	19477	Spring House	47	D	11
10	18932	Line Lexington	46	D	14
11	18964	Souderton	43	D	22
12	18969	Telford	43	D	22
13	19355	Malvern	40	D	30
14	19440	Hatfield	38	F	38
15	18041	East Greenville	33	F	314
16	18070	Palm	33	F	213
17	19426	Collegeville	33	F	881
18	18054	Green Lane	—	—	6
19	19435	Frederick	—	—	—
20	19472	Sassamansville	—	—	—
21	19504	Barto	—	—	245

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

BibTeX

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

Page version: October 2026.

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