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2026 Rankings

Kennebec County, Maine Home Safety Rankings - 52 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.

Kennebec County, Maine (Maine) includes 52 tracked ZIP codes and 17 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 (63/100)

Grade	ZIP Codes	%
A	0	0%
B	1	9%
C	8	73%
D	2	18%
F	0	0%

Top 10 ZIP Codes by Home Safety Score

Rank	ZIP	City	Score	Grade
1	04861	Thomaston	83	B
2	04330	Augusta	66	C
3	04351	Manchester	66	C
4	04101	Portland	65	C
5	04102	Portland	65	C
6	04103	Portland	65	C
7	04105	Falmouth	65	C
8	04106	South Portland	65	C
9	04345	Gardiner	63	C
10	04989	Vassalboro	49	D

10 Riskiest ZIP Codes

Rank	ZIP	City	Score	Grade	Risk Factor
1	04901	Waterville	46	D	12 violations
2	04989	Vassalboro	49	D	4 violations
3	04345	Gardiner	63	C	9 violations
4	04106	South Portland	65	C	6 violations
5	04105	Falmouth	65	C	6 violations
6	04103	Portland	65	C	6 violations
7	04102	Portland	65	C	6 violations
8	04101	Portland	65	C	6 violations
9	04351	Manchester	66	C	3 violation(s)
10	04330	Augusta	66	C	2 violation(s)

Most Common Contaminant Violations

Contaminant	Violations	ZIPs Affected
Bromate	18	9
Chlorite	18	9
Haloacetic Acids (HAA5)	17	14
Total Trihalomethanes (TTHM)	15	13
Stage 1 DBP Rule	13	9
Surface Water Treatment Rule	8	7
Lead and Copper Rule	6	3
E. coli	6	3

Lead Risk

Average of reported 90th-percentile lead results: 0.0020 mg/L (below EPA action level)
0 of 23 ZIP codes with known status exceed EPA lead action level
36% of housing built before 1950
51% of housing built before 1970

Cities in This Metro

Portland, ME — 9 ZIP codes
Augusta, ME — 5 ZIP codes
South Portland, ME — 2 ZIP codes
Waterville, ME — 2 ZIP codes
Cliff Island, ME — 1 ZIP code
Long Island, ME — 1 ZIP code
Falmouth, ME — 1 ZIP code
Peaks Island, ME — 1 ZIP code
Monmouth, ME — 1 ZIP code
North Monmouth, ME — 1 ZIP code
South Paris, ME — 1 ZIP code
Coopers Mills, ME — 1 ZIP code
East Winthrop, ME — 1 ZIP code
Gardiner, ME — 1 ZIP code
Hallowell, ME — 1 ZIP code
Jefferson, ME — 1 ZIP code
Litchfield, ME — 1 ZIP code
Manchester, ME — 1 ZIP code
Mount Vernon, ME — 1 ZIP code
Whitefield, ME — 1 ZIP code
Readfield, ME — 1 ZIP code
South China, ME — 1 ZIP code
South Gardiner, ME — 1 ZIP code
Vienna, ME — 1 ZIP code
Windsor, ME — 1 ZIP code
Winthrop, ME — 1 ZIP code
Thomaston, ME — 1 ZIP code
Albion, ME — 1 ZIP code
Belgrade, ME — 1 ZIP code
Belgrade Lakes, ME — 1 ZIP code

...and 8 more cities

All 52 ZIP Codes Ranked

View complete ranking

Rank	ZIP	City	Score	Grade	Violations
1	04861	Thomaston	83	B	2
2	04330	Augusta	66	C	2
3	04351	Manchester	66	C	3
4	04101	Portland	65	C	6
5	04102	Portland	65	C	6
6	04103	Portland	65	C	6
7	04105	Falmouth	65	C	6
8	04106	South Portland	65	C	6
9	04345	Gardiner	63	C	9
10	04989	Vassalboro	49	D	4
11	04901	Waterville	46	D	12
12	04019	Cliff Island	—	—	6
13	04050	Long Island	—	—	6
14	04108	Peaks Island	—	—	6
15	04109	Portland	—	—	6
16	04259	Monmouth	—	—	1
17	04265	North Monmouth	—	—	—
18	04281	South Paris	—	—	0
19	04347	Hallowell	—	—	2
20	04348	Jefferson	—	—	—
21	04350	Litchfield	—	—	—
22	04352	Mount Vernon	—	—	—
23	04353	Whitefield	—	—	—
24	04355	Readfield	—	—	—
25	04358	South China	—	—	—
26	04359	South Gardiner	—	—	8
27	04360	Vienna	—	—	—
28	04363	Windsor	—	—	—
29	04364	Winthrop	—	—	2
30	04910	Albion	—	—	—
31	04917	Belgrade	—	—	—
32	04927	Clinton	—	—	1
33	04929	Detroit	—	—	—
34	04963	Oakland	—	—	6
35	04967	Pittsfield	—	—	2

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). Kennebec County, Maine Home Safety Rankings - 52 ZIPs. https://zipcheckup.com/rankings/metro/kennebec-maine/

BibTeX

@misc{zipcheckup-rankings-metro-kennebec-maine,
  author = {{ZipCheckup}},
  title  = {{Kennebec County, Maine Home Safety Rankings - 52 ZIPs}},
  year   = {2026},
  url    = {https://zipcheckup.com/rankings/metro/kennebec-maine/}
}

Page version: October 2026.

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