Least Reliable Water Systems in Vermont — 2026

Out of 312 ZIP codes with data in Vermont, these are the lowest-ranked areas for reliability score. See also: National Least Reliable Water Systems in America | All Vermont Rankings

Statistic	Value
ZIP codes ranked	312
Lowest value	20/100
Median value	75/100
State	Vermont

100 Lowest-Ranked ZIP Codes

Rank	ZIP Code	City	State	Reliability Score	Safety Score
1	05673	Waitsfield	VT	20/100	53/100
2	05462	Huntington	VT	31/100	78/100
3	05866	Sheffield	VT	32/100	78/100
4	05354	Vernon	VT	35/100	63/100
5	05492	Waterville	VT	36/100	68/100
6	05649	East Barre	VT	37/100	78/100
7	05822	Barton	VT	40/100	64/100
8	05009	White River Junction	VT	42/100	78/100
9	05674	Warren	VT	42/100	49/100
10	05821	Barnet	VT	42/100	75/100
11	05874	Westfield	VT	42/100	79/100
12	05148	Londonderry	VT	44/100	73/100
13	05444	Cambridge	VT	45/100	70/100
14	05488	Swanton	VT	45/100	70/100
15	05651	East Montpelier	VT	45/100	69/100
16	05839	Glover	VT	45/100	74/100
17	05001	White River Junction	VT	47/100	74/100
18	05034	Bridgewater	VT	47/100	79/100
19	05047	Hartford	VT	47/100	79/100
20	05060	Randolph	VT	47/100	79/100
21	05671	Waterbury	VT	47/100	79/100
22	05676	Waterbury	VT	47/100	69/100
23	05403	South Burlington	VT	50/100	81/100
24	05407	South Burlington	VT	50/100	82/100
25	05661	Morrisville	VT	50/100	72/100
26	05667	Plainfield	VT	50/100	65/100
27	05675	Washington	VT	50/100	79/100
28	05903	Canaan	VT	50/100	77/100
29	05255	Manchester Center	VT	51/100	72/100
30	05056	Plymouth	VT	52/100	51/100
31	05074	Thetford	VT	52/100	77/100
32	05158	Westminster	VT	52/100	74/100
33	05440	Alburgh	VT	52/100	91/100
34	05470	Montgomery	VT	52/100	79/100
35	05855	Newport	VT	54/100	78/100
36	05401	Burlington	VT	55/100	91/100
37	05402	Burlington	VT	55/100	91/100
38	05405	Burlington	VT	55/100	95/100
39	05406	Burlington	VT	55/100	95/100
40	05408	Burlington	VT	55/100	86/100
41	05447	East Berkshire	VT	55/100	81/100
42	05451	Essex	VT	55/100	95/100
43	05452	Essex Junction	VT	55/100	91/100
44	05453	Essex Junction	VT	55/100	95/100
45	05648	Calais	VT	55/100	74/100
46	05650	East Calais	VT	55/100	74/100
47	05748	Hancock	VT	55/100	76/100
48	05751	Killington	VT	55/100	68/100
49	05820	Albany	VT	55/100	81/100
50	05824	Concord	VT	55/100	79/100
51	05837	East Haven	VT	55/100	81/100
52	05860	Orleans	VT	55/100	74/100
53	05251	Dorset	VT	57/100	79/100
54	05736	Center Rutland	VT	57/100	82/100
55	05739	Danby	VT	57/100	79/100
56	05762	Pittsfield	VT	57/100	82/100
57	05149	Ludlow	VT	60/100	63/100
58	05340	Bondville	VT	60/100	50/100
59	05356	West Dover	VT	60/100	73/100
60	05404	Winooski	VT	60/100	93/100
61	05476	Richford	VT	60/100	81/100
62	05672	Stowe	VT	60/100	47/100
63	05682	Worcester	VT	60/100	76/100
64	05826	Craftsbury	VT	60/100	78/100
65	05847	Lowell	VT	60/100	63/100
66	05043	East Thetford	VT	62/100	78/100
67	05439	Colchester	VT	62/100	98/100
68	05446	Colchester	VT	62/100	84/100
69	05449	Colchester	VT	62/100	98/100
70	05468	Milton	VT	62/100	86/100
71	05641	Barre	VT	62/100	67/100
72	05701	Rutland	VT	62/100	68/100
73	05765	Proctor	VT	62/100	74/100
74	05450	Enosburg Falls	VT	63/100	76/100
75	05254	Manchester	VT	64/100	77/100
76	05048	Hartland	VT	65/100	79/100
77	05052	North Hartland	VT	65/100	80/100
78	05091	Woodstock	VT	65/100	68/100
79	05154	Saxtons River	VT	65/100	80/100
80	05261	Pownal	VT	65/100	78/100
81	05443	Bristol	VT	65/100	72/100
82	05487	Starksboro	VT	65/100	79/100
83	05494	Westford	VT	65/100	92/100
84	05601	Montpelier	VT	65/100	78/100
85	05602	Montpelier	VT	65/100	63/100
86	05603	Montpelier	VT	65/100	78/100
87	05604	Montpelier	VT	65/100	78/100
88	05609	Montpelier	VT	65/100	78/100
89	05620	Montpelier	VT	65/100	78/100
90	05633	Montpelier	VT	65/100	73/100
91	05655	Hyde Park	VT	65/100	80/100
92	05068	South Royalton	VT	67/100	73/100
93	05454	Fairfax	VT	67/100	82/100
94	05702	Rutland	VT	67/100	78/100
95	05035	Bridgewater Corners	VT	70/100	55/100
96	05039	Corinth	VT	70/100	63/100
97	05049	Hartland Four Corners	VT	70/100	53/100
98	05054	North Thetford	VT	70/100	63/100
99	05075	Thetford Center	VT	70/100	63/100
100	05086	West Topsham	VT	70/100	63/100

Methodology

Water system reliability scores (0-100) combine violation frequency, violation recency, resolution rate, and system size. Systems with repeated health-based violations and unresolved issues score lowest. The reliability score focuses specifically on the water utility performance, distinct from the broader Home Safety Score.

Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-06-04.

Frequently Asked Questions

What does a low water reliability score mean?

A low reliability score (below 50) indicates a water system with frequent violations, poor resolution rates, or recurring compliance issues. These systems may have aging infrastructure, inadequate treatment, or management challenges.

How is reliability different from safety score?

The reliability score focuses specifically on the water utility performance (violations, resolution, compliance). The Home Safety Score is broader, also including lead risk, radon, and flood data. A ZIP code can have a reliable water system but still have high radon or flood risk.