Worst Infrastructure: Connecticut

Out of 286 ZIP codes with infrastructure data in Connecticut, these areas face the highest estimated risk of water pipe failure based on infrastructure age, funding gaps, and violation history.

Statistic	Value
ZIP codes ranked	286
Highest risk	NaN%
Median risk	NaN%
Average risk	NaN%
State	Connecticut

Top 100 Highest Risk ZIP Codes

Rank	ZIP Code	City	State	Pipe Failure Risk	Risk Level	Safety Score
1	06001	Avon	CT	NaN%	Unknown	83/100
2	06002	Bloomfield	CT	NaN%	Unknown	83/100
3	06010	Bristol	CT	NaN%	Unknown	82/100
4	06013	Burlington	CT	NaN%	Unknown	83/100
5	06016	Broad Brook	CT	NaN%	Unknown	83/100
6	06018	Canaan	CT	NaN%	Unknown	—
7	06019	Canton	CT	NaN%	Unknown	83/100
8	06020	Canton Center	CT	NaN%	Unknown	—
9	06021	Colebrook	CT	NaN%	Unknown	—
10	06022	Collinsville	CT	NaN%	Unknown	—
11	06023	East Berlin	CT	NaN%	Unknown	—
12	06024	East Canaan	CT	NaN%	Unknown	—
13	06026	East Granby	CT	NaN%	Unknown	67/100
14	06027	East Hartland	CT	NaN%	Unknown	—
15	06029	Ellington	CT	NaN%	Unknown	66/100
16	06031	Falls Village	CT	NaN%	Unknown	—
17	06032	Farmington	CT	NaN%	Unknown	81/100
18	06033	Glastonbury	CT	NaN%	Unknown	82/100
19	06035	Granby	CT	NaN%	Unknown	81/100
20	06037	Berlin	CT	NaN%	Unknown	67/100
21	06039	Lakeville	CT	NaN%	Unknown	—
22	06040	Manchester	CT	NaN%	Unknown	82/100
23	06042	Manchester	CT	NaN%	Unknown	82/100
24	06043	Bolton	CT	NaN%	Unknown	—
25	06051	New Britain	CT	NaN%	Unknown	100/100
26	06052	New Britain	CT	NaN%	Unknown	97/100
27	06053	New Britain	CT	NaN%	Unknown	82/100
28	06057	New Hartford	CT	NaN%	Unknown	82/100
29	06058	Norfolk	CT	NaN%	Unknown	—
30	06059	North Canton	CT	NaN%	Unknown	—
31	06060	North Granby	CT	NaN%	Unknown	—
32	06061	Pine Meadow	CT	NaN%	Unknown	—
33	06062	Plainville	CT	NaN%	Unknown	78/100
34	06063	Barkhamsted	CT	NaN%	Unknown	—
35	06065	Riverton	CT	NaN%	Unknown	—
36	06066	Vernon Rockville	CT	NaN%	Unknown	64/100
37	06067	Rocky Hill	CT	NaN%	Unknown	100/100
38	06068	Salisbury	CT	NaN%	Unknown	—
39	06069	Sharon	CT	NaN%	Unknown	—
40	06070	Simsbury	CT	NaN%	Unknown	69/100
41	06071	Somers	CT	NaN%	Unknown	65/100
42	06073	South Glastonbury	CT	NaN%	Unknown	100/100
43	06074	South Windsor	CT	NaN%	Unknown	80/100
44	06076	Stafford Springs	CT	NaN%	Unknown	—
45	06078	Suffield	CT	NaN%	Unknown	83/100
46	06079	Taconic	CT	NaN%	Unknown	—
47	06081	Tariffville	CT	NaN%	Unknown	—
48	06082	Enfield	CT	NaN%	Unknown	81/100
49	06084	Tolland	CT	NaN%	Unknown	63/100
50	06085	Unionville	CT	NaN%	Unknown	83/100
51	06088	East Windsor	CT	NaN%	Unknown	83/100
52	06089	Weatogue	CT	NaN%	Unknown	72/100
53	06090	West Granby	CT	NaN%	Unknown	—
54	06091	West Hartland	CT	NaN%	Unknown	—
55	06092	West Simsbury	CT	NaN%	Unknown	83/100
56	06093	West Suffield	CT	NaN%	Unknown	83/100
57	06095	Windsor	CT	NaN%	Unknown	100/100
58	06096	Windsor Locks	CT	NaN%	Unknown	83/100
59	06098	Winsted	CT	NaN%	Unknown	83/100
60	06103	Hartford	CT	NaN%	Unknown	100/100
61	06105	Hartford	CT	NaN%	Unknown	100/100
62	06106	Hartford	CT	NaN%	Unknown	100/100
63	06107	West Hartford	CT	NaN%	Unknown	100/100
64	06108	East Hartford	CT	NaN%	Unknown	100/100
65	06109	Wethersfield	CT	NaN%	Unknown	100/100
66	06110	West Hartford	CT	NaN%	Unknown	100/100
67	06111	Newington	CT	NaN%	Unknown	87/100
68	06112	Hartford	CT	NaN%	Unknown	100/100
69	06114	Hartford	CT	NaN%	Unknown	100/100
70	06117	West Hartford	CT	NaN%	Unknown	100/100
71	06118	East Hartford	CT	NaN%	Unknown	100/100
72	06119	West Hartford	CT	NaN%	Unknown	100/100
73	06120	Hartford	CT	NaN%	Unknown	100/100
74	06226	Willimantic	CT	NaN%	Unknown	83/100
75	06231	Amston	CT	NaN%	Unknown	—
76	06232	Andover	CT	NaN%	Unknown	—
77	06234	Brooklyn	CT	NaN%	Unknown	67/100
78	06235	Chaplin	CT	NaN%	Unknown	—
79	06237	Columbia	CT	NaN%	Unknown	—
80	06238	Coventry	CT	NaN%	Unknown	77/100
81	06239	Danielson	CT	NaN%	Unknown	67/100
82	06241	Dayville	CT	NaN%	Unknown	67/100
83	06242	Eastford	CT	NaN%	Unknown	—
84	06243	East Killingly	CT	NaN%	Unknown	—
85	06247	Hampton	CT	NaN%	Unknown	—
86	06248	Hebron	CT	NaN%	Unknown	—
87	06249	Lebanon	CT	NaN%	Unknown	—
88	06250	Mansfield Center	CT	NaN%	Unknown	73/100
89	06254	North Franklin	CT	NaN%	Unknown	—
90	06255	North Grosvenordale	CT	NaN%	Unknown	—
91	06256	North Windham	CT	NaN%	Unknown	—
92	06259	Pomfret Center	CT	NaN%	Unknown	—
93	06260	Putnam	CT	NaN%	Unknown	60/100
94	06262	Quinebaug	CT	NaN%	Unknown	—
95	06263	Rogers	CT	NaN%	Unknown	67/100
96	06264	Scotland	CT	NaN%	Unknown	—
97	06266	South Windham	CT	NaN%	Unknown	—
98	06268	Storrs Mansfield	CT	NaN%	Unknown	50/100
99	06269	Storrs Mansfield	CT	NaN%	Unknown	59/100
100	06277	Thompson	CT	NaN%	Unknown	67/100

Methodology

Infrastructure risk rankings combine four data sources, each weighted equally (25%): (1) EPA Drinking Water Infrastructure Needs Survey (DWINS 2023) — state-level 20-year funding gap per capita for pipe replacement, treatment, and storage; (2) Census ACS housing vintage — percentage of homes built before 1980, when lead solder and galvanized pipes were common; (3) EPA SDWIS violation and enforcement data — system-level compliance history; (4) Lead and Copper Rule indicators — service line material inventories and 90th percentile lead testing results. The combined score is normalized to a 0-100% probability scale.

Data sources: EPA DWINS 2023, Census ACS, EPA SDWIS, Lead and Copper Rule data. Last updated: 2026-08-31.

Frequently Asked Questions

What does pipe failure probability mean?

Pipe failure probability estimates the likelihood of water main breaks, lead contamination from corroded pipes, or service disruptions based on infrastructure age, state funding gaps, violation history, and lead indicators. It is not a prediction of imminent failure, but a risk assessment based on known factors.

How is infrastructure risk calculated?

The risk score combines four equally weighted factors: state-level infrastructure funding gap per capita (from EPA DWINS 2023), housing vintage (Census ACS pre-1980 housing percentage), water system violation and enforcement history (EPA SDWIS), and lead exposure indicators (service line probability and testing results).

What can homeowners do about aging infrastructure?

Test your tap water annually, especially for lead. Check if your home has a lead service line through your water utility. Consider a whole-house water filter (NSF/ANSI 53 certified). Review your water system Consumer Confidence Report for violation history.

Does high risk mean my water is unsafe right now?

Not necessarily. Infrastructure risk indicates long-term vulnerability, not current contamination. However, areas with aging pipes and high violation counts have a statistically higher chance of water quality issues. Regular testing is the best way to verify your water safety.

Worst Infrastructure: Connecticut — 2026 Rankings