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2026 Rankings

Jefferson County, New York Home Safety Rankings - 45 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.

Jefferson County, New York (New York) includes 45 tracked ZIP codes and 25 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 (73/100)

Grade	ZIP Codes	%
A	0	0%
B	2	40%
C	3	60%
D	0	0%
F	0	0%

Top 10 ZIP Codes by Home Safety Score

Rank	ZIP	City	Score	Grade
1	13602	Fort Drum	83	B
2	13619	Carthage	83	B
3	13088	Liverpool	66	C
4	13090	Liverpool	66	C
5	13601	Watertown	65	C

10 Riskiest ZIP Codes

Rank	ZIP	City	Score	Grade	Risk Factor
1	13601	Watertown	65	C	11 violations
2	13090	Liverpool	66	C	2 violation(s)
3	13088	Liverpool	66	C	2 violation(s)
4	13619	Carthage	83	B	23 violations
5	13602	Fort Drum	83	B	—

Most Common Contaminant Violations

Contaminant	Violations	ZIPs Affected
Total Trihalomethanes (TTHM)	17	8
Lead	7	3
Haloacetic Acids (HAA5)	6	4
PFOA	2	2
PFNA	2	2
Dichloroacetic Acid	2	2
Bromodichloromethane	2	2
Dibromochloromethane	2	2

Lead Risk

Average of reported 90th-percentile lead results: 0.0042 mg/L (below EPA action level)
0 of 21 ZIP codes with known status exceed EPA lead action level
28% of housing built before 1950
47% of housing built before 1970

Cities in This Metro

Liverpool, NY — 3 ZIP codes
Watertown, NY — 2 ZIP codes
Fort Drum, NY — 1 ZIP code
Adams, NY — 1 ZIP code
Adams Center, NY — 1 ZIP code
Alexandria Bay, NY — 1 ZIP code
Antwerp, NY — 1 ZIP code
Belleville, NY — 1 ZIP code
Black River, NY — 1 ZIP code
Brownville, NY — 1 ZIP code
Calcium, NY — 1 ZIP code
Cape Vincent, NY — 1 ZIP code
Carthage, NY — 1 ZIP code
Chaumont, NY — 1 ZIP code
Chippewa Bay, NY — 1 ZIP code
Clayton, NY — 1 ZIP code
Deferiet, NY — 1 ZIP code
Depauville, NY — 1 ZIP code
Dexter, NY — 1 ZIP code
Ellisburg, NY — 1 ZIP code
Evans Mills, NY — 1 ZIP code
Felts Mills, NY — 1 ZIP code
Wellesley Island, NY — 1 ZIP code
Fishers Landing, NY — 1 ZIP code
Great Bend, NY — 1 ZIP code
Henderson, NY — 1 ZIP code
Henderson Harbor, NY — 1 ZIP code
La Fargeville, NY — 1 ZIP code
Limerick, NY — 1 ZIP code
Lorraine, NY — 1 ZIP code

...and 12 more cities

All 45 ZIP Codes Ranked

View complete ranking

Rank	ZIP	City	Score	Grade	Violations
1	13602	Fort Drum	83	B	0
2	13619	Carthage	83	B	23
3	13088	Liverpool	66	C	2
4	13090	Liverpool	66	C	2
5	13601	Watertown	65	C	11
6	13603	Watertown	—	—	0
7	13605	Adams	—	—	2
8	13606	Adams Center	—	—	3
9	13607	Alexandria Bay	—	—	0
10	13608	Antwerp	—	—	0
11	13611	Belleville	—	—	—
12	13612	Black River	—	—	0
13	13615	Brownville	—	—	—
14	13616	Calcium	—	—	—
15	13618	Cape Vincent	—	—	0
16	13622	Chaumont	—	—	1
17	13623	Chippewa Bay	—	—	—
18	13624	Clayton	—	—	0
19	13628	Deferiet	—	—	—
20	13632	Depauville	—	—	—
21	13634	Dexter	—	—	1
22	13636	Ellisburg	—	—	—
23	13637	Evans Mills	—	—	5
24	13638	Felts Mills	—	—	0
25	13640	Wellesley Island	—	—	0
26	13641	Fishers Landing	—	—	—
27	13650	Henderson	—	—	—
28	13651	Henderson Harbor	—	—	—
29	13656	La Fargeville	—	—	—
30	13659	Lorraine	—	—	—
31	13661	Mannsville	—	—	—
32	13665	Natural Bridge	—	—	21
33	13673	Philadelphia	—	—	0
34	13674	Pierrepont Manor	—	—	—
35	13675	Plessis	—	—	—
36	13679	Redwood	—	—	0
37	13682	Rodman	—	—	—
38	13685	Sackets Harbor	—	—	0
39	13691	Theresa	—	—	0
40	13692	Thousand Island Park	—	—	—
41	13693	Three Mile Bay	—	—	—

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). Jefferson County, New York Home Safety Rankings - 45 ZIPs. https://zipcheckup.com/rankings/metro/jefferson-new-york/

BibTeX

@misc{zipcheckup-rankings-metro-jefferson-new-york,
  author = {{ZipCheckup}},
  title  = {{Jefferson County, New York Home Safety Rankings - 45 ZIPs}},
  year   = {2026},
  url    = {https://zipcheckup.com/rankings/metro/jefferson-new-york/}
}

Page version: October 2026.

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