Least Reliable Water Systems in Vermont — 2026

Out of 308 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	308
Lowest value	10/100
Median value	73/100
State	Vermont

100 Lowest-Ranked ZIP Codes

Rank	ZIP Code	City	State	Reliability Score	Safety Score
1	05673	Waitsfield	VT	10/100	53/100
2	05354	Vernon	VT	20/100	63/100
3	05462	Huntington	VT	21/100	78/100
4	05649	East Barre	VT	22/100	78/100
5	05866	Sheffield	VT	22/100	78/100
6	05492	Waterville	VT	26/100	68/100
7	05874	Westfield	VT	27/100	79/100
8	05822	Barton	VT	30/100	64/100
9	05839	Glover	VT	30/100	74/100
10	05001	White River Junction	VT	32/100	74/100
11	05009	White River Junction	VT	32/100	78/100
12	05821	Barnet	VT	32/100	75/100
13	05148	Londonderry	VT	34/100	73/100
14	05444	Cambridge	VT	35/100	70/100
15	05488	Swanton	VT	35/100	70/100
16	05651	East Montpelier	VT	35/100	69/100
17	05034	Bridgewater	VT	37/100	79/100
18	05047	Hartford	VT	37/100	79/100
19	05060	Randolph	VT	37/100	79/100
20	05671	Waterbury	VT	37/100	79/100
21	05676	Waterbury	VT	37/100	69/100
22	05403	South Burlington	VT	40/100	81/100
23	05407	South Burlington	VT	40/100	82/100
24	05661	Morrisville	VT	40/100	72/100
25	05667	Plainfield	VT	40/100	65/100
26	05675	Washington	VT	40/100	79/100
27	05903	Canaan	VT	40/100	77/100
28	05255	Manchester Center	VT	41/100	72/100
29	05056	Plymouth	VT	42/100	51/100
30	05074	Thetford	VT	42/100	77/100
31	05158	Westminster	VT	42/100	74/100
32	05440	Alburgh	VT	42/100	91/100
33	05470	Montgomery	VT	42/100	79/100
34	05674	Warren	VT	42/100	49/100
35	05855	Newport	VT	44/100	78/100
36	05401	Burlington	VT	45/100	91/100
37	05402	Burlington	VT	45/100	91/100
38	05405	Burlington	VT	45/100	95/100
39	05406	Burlington	VT	45/100	95/100
40	05408	Burlington	VT	45/100	86/100
41	05648	Calais	VT	45/100	74/100
42	05650	East Calais	VT	45/100	74/100
43	05751	Killington	VT	45/100	68/100
44	05824	Concord	VT	45/100	79/100
45	05837	East Haven	VT	45/100	81/100
46	05860	Orleans	VT	45/100	74/100
47	05251	Dorset	VT	47/100	79/100
48	05736	Center Rutland	VT	47/100	82/100
49	05739	Danby	VT	47/100	79/100
50	05762	Pittsfield	VT	47/100	82/100
51	05149	Ludlow	VT	50/100	63/100
52	05340	Bondville	VT	50/100	50/100
53	05672	Stowe	VT	50/100	47/100
54	05682	Worcester	VT	50/100	76/100
55	05826	Craftsbury	VT	50/100	78/100
56	05043	East Thetford	VT	52/100	78/100
57	05439	Colchester	VT	52/100	98/100
58	05446	Colchester	VT	52/100	84/100
59	05449	Colchester	VT	52/100	98/100
60	05468	Milton	VT	52/100	86/100
61	05641	Barre	VT	52/100	67/100
62	05765	Proctor	VT	52/100	74/100
63	05748	Hancock	VT	53/100	76/100
64	05254	Manchester	VT	54/100	77/100
65	05048	Hartland	VT	55/100	79/100
66	05052	North Hartland	VT	55/100	80/100
67	05091	Woodstock	VT	55/100	68/100
68	05154	Saxtons River	VT	55/100	80/100
69	05261	Pownal	VT	55/100	78/100
70	05356	West Dover	VT	55/100	73/100
71	05443	Bristol	VT	55/100	72/100
72	05487	Starksboro	VT	55/100	79/100
73	05494	Westford	VT	55/100	92/100
74	05601	Montpelier	VT	55/100	78/100
75	05602	Montpelier	VT	55/100	63/100
76	05603	Montpelier	VT	55/100	78/100
77	05604	Montpelier	VT	55/100	78/100
78	05609	Montpelier	VT	55/100	78/100
79	05620	Montpelier	VT	55/100	78/100
80	05633	Montpelier	VT	55/100	73/100
81	05655	Hyde Park	VT	55/100	80/100
82	05767	Rochester	VT	55/100	81/100
83	05820	Albany	VT	55/100	81/100
84	05836	East Hardwick	VT	55/100	81/100
85	05068	South Royalton	VT	57/100	73/100
86	05454	Fairfax	VT	57/100	82/100
87	05701	Rutland	VT	57/100	68/100
88	05702	Rutland	VT	57/100	78/100
89	05450	Enosburg Falls	VT	58/100	76/100
90	05089	Windsor	VT	60/100	75/100
91	05143	Chester	VT	60/100	69/100
92	05201	Bennington	VT	60/100	55/100
93	05301	Brattleboro	VT	60/100	75/100
94	05302	Brattleboro	VT	60/100	80/100
95	05303	Brattleboro	VT	60/100	75/100
96	05304	Brattleboro	VT	60/100	80/100
97	05361	Whitingham	VT	60/100	79/100
98	05363	Wilmington	VT	60/100	73/100
99	05447	East Berkshire	VT	60/100	81/100
100	05451	Essex	VT	60/100	95/100

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: 2026-04-13.

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.