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2026 Rankings

Barnstable County, Massachusetts Home Safety Rankings - 40 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.

Barnstable County, Massachusetts (Massachusetts) includes 40 tracked ZIP codes and 19 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: B (78/100)

Grade	ZIP Codes	%
A	0	0%
B	19	70%
C	8	30%
D	0	0%
F	0	0%

Top 10 ZIP Codes by Home Safety Score

Rank	ZIP	City	Score	Grade
1	02601	Hyannis	83	B
2	02633	Chatham	83	B
3	02635	Cotuit	83	B
4	02639	Dennis Port	83	B
5	02641	East Dennis	83	B
6	02642	Eastham	83	B
7	02644	Forestdale	83	B
8	02645	Harwich	83	B
9	02649	Mashpee	83	B

10 Riskiest ZIP Codes

Rank	ZIP	City	Score	Grade	Risk Factor
1	02675	Yarmouth Port	65	C	2 violation(s)
2	02767	Raynham	67	C	30 violations
3	02668	West Barnstable	67	C	1 violation(s)
4	02655	Osterville	67	C	1 violation(s)
5	02648	Marstons Mills	67	C	1 violation(s)
6	02637	Cummaquid	67	C	—
7	02632	Centerville	67	C	1 violation(s)
8	02630	Barnstable	67	C	—
9	02673	West Yarmouth	82	B	2 violation(s)
10	02664	South Yarmouth	82	B	2 violation(s)

Most Common Contaminant Violations

Contaminant	Violations	ZIPs Affected
Lead	10	10
Consumer Confidence Report Rule	5	3
ENTEROCOCCI	3	3
Endrin	1	1
BHC-GAMMA	1	1
Methoxychlor	1	1
Toxaphene	1	1
Dalapon	1	1

Lead Risk

Average of reported 90th-percentile lead results: 0.0023 mg/L (below EPA action level)
0 of 35 ZIP codes with known status exceed EPA lead action level
15% of housing built before 1950
38% of housing built before 1970

Cities in This Metro

Centerville, MA — 2 ZIP codes
Hyannis, MA — 1 ZIP code
Barnstable, MA — 1 ZIP code
Chatham, MA — 1 ZIP code
Cotuit, MA — 1 ZIP code
Cummaquid, MA — 1 ZIP code
Dennis, MA — 1 ZIP code
Dennis Port, MA — 1 ZIP code
East Dennis, MA — 1 ZIP code
Eastham, MA — 1 ZIP code
East Orleans, MA — 1 ZIP code
Forestdale, MA — 1 ZIP code
Harwich, MA — 1 ZIP code
Harwich Port, MA — 1 ZIP code
Hyannis Port, MA — 1 ZIP code
Marstons Mills, MA — 1 ZIP code
Mashpee, MA — 1 ZIP code
North Chatham, MA — 1 ZIP code
North Eastham, MA — 1 ZIP code
North Truro, MA — 1 ZIP code
Orleans, MA — 1 ZIP code
Osterville, MA — 1 ZIP code
Provincetown, MA — 1 ZIP code
South Chatham, MA — 1 ZIP code
South Dennis, MA — 1 ZIP code
South Harwich, MA — 1 ZIP code
South Orleans, MA — 1 ZIP code
South Wellfleet, MA — 1 ZIP code
South Yarmouth, MA — 1 ZIP code
Truro, MA — 1 ZIP code

...and 9 more cities

All 40 ZIP Codes Ranked

View complete ranking

Rank	ZIP	City	Score	Grade	Violations
1	02601	Hyannis	83	B	1
2	02633	Chatham	83	B	0
3	02635	Cotuit	83	B	1
4	02639	Dennis Port	83	B	0
5	02641	East Dennis	83	B	0
6	02642	Eastham	83	B	0
7	02644	Forestdale	83	B	1
8	02645	Harwich	83	B	0
9	02649	Mashpee	83	B	0
10	02650	North Chatham	83	B	0
11	02652	North Truro	83	B	0
12	02653	Orleans	83	B	0
13	02657	Provincetown	83	B	0
14	02659	South Chatham	83	B	0
15	02660	South Dennis	83	B	0
16	02670	West Dennis	83	B	0
17	02664	South Yarmouth	82	B	2
18	02673	West Yarmouth	82	B	2
19	02630	Barnstable	67	C	0
20	02632	Centerville	67	C	1
21	02637	Cummaquid	67	C	0
22	02648	Marstons Mills	67	C	1
23	02655	Osterville	67	C	1
24	02668	West Barnstable	67	C	1
25	02767	Raynham	67	C	30
26	02675	Yarmouth Port	65	C	2
27	02638	Dennis	—	—	0
28	02646	Harwich Port	—	—	0
29	02647	Hyannis Port	—	—	0
30	02663	South Wellfleet	—	—	2
31	02666	Truro	—	—	0
32	02667	Wellfleet	—	—	2
33	02671	West Harwich	—	—	0

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). Barnstable County, Massachusetts Home Safety Rankings - 40 ZIPs. https://zipcheckup.com/rankings/metro/barnstable-massachusetts/

BibTeX

@misc{zipcheckup-rankings-metro-barnstable-massachusetts,
  author = {{ZipCheckup}},
  title  = {{Barnstable County, Massachusetts Home Safety Rankings - 40 ZIPs}},
  year   = {2026},
  url    = {https://zipcheckup.com/rankings/metro/barnstable-massachusetts/}
}

Page version: October 2026.

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