Worst Infrastructure: New Hampshire

Out of 246 ZIP codes with infrastructure data in New Hampshire, 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	246
Highest risk	NaN%
Median risk	NaN%
Average risk	NaN%
State	New Hampshire

Top 100 Highest Risk ZIP Codes

Rank	ZIP Code	City	State	Pipe Failure Risk	Risk Level	Safety Score
1	03031	Amherst	NH	NaN%	Unknown	—
2	03032	Auburn	NH	NaN%	Unknown	—
3	03033	Brookline	NH	NaN%	Unknown	—
4	03034	Candia	NH	NaN%	Unknown	—
5	03036	Chester	NH	NaN%	Unknown	—
6	03037	Deerfield	NH	NaN%	Unknown	—
7	03038	Derry	NH	NaN%	Unknown	66/100
8	03042	Epping	NH	NaN%	Unknown	—
9	03043	Francestown	NH	NaN%	Unknown	—
10	03044	Fremont	NH	NaN%	Unknown	—
11	03045	Goffstown	NH	NaN%	Unknown	—
12	03046	Dunbarton	NH	NaN%	Unknown	—
13	03047	Greenfield	NH	NaN%	Unknown	—
14	03048	Greenville	NH	NaN%	Unknown	—
15	03049	Hollis	NH	NaN%	Unknown	—
16	03051	Hudson	NH	NaN%	Unknown	63/100
17	03052	Litchfield	NH	NaN%	Unknown	67/100
18	03053	Londonderry	NH	NaN%	Unknown	66/100
19	03054	Merrimack	NH	NaN%	Unknown	75/100
20	03055	Milford	NH	NaN%	Unknown	83/100
21	03057	Mont Vernon	NH	NaN%	Unknown	—
22	03060	Nashua	NH	NaN%	Unknown	83/100
23	03062	Nashua	NH	NaN%	Unknown	83/100
24	03063	Nashua	NH	NaN%	Unknown	83/100
25	03064	Nashua	NH	NaN%	Unknown	83/100
26	03070	New Boston	NH	NaN%	Unknown	—
27	03071	New Ipswich	NH	NaN%	Unknown	—
28	03076	Pelham	NH	NaN%	Unknown	—
29	03077	Raymond	NH	NaN%	Unknown	83/100
30	03079	Salem	NH	NaN%	Unknown	65/100
31	03082	Lyndeborough	NH	NaN%	Unknown	—
32	03084	Temple	NH	NaN%	Unknown	—
33	03086	Wilton	NH	NaN%	Unknown	—
34	03087	Windham	NH	NaN%	Unknown	66/100
35	03101	Manchester	NH	NaN%	Unknown	—
36	03102	Manchester	NH	NaN%	Unknown	—
37	03103	Manchester	NH	NaN%	Unknown	67/100
38	03104	Manchester	NH	NaN%	Unknown	—
39	03106	Hooksett	NH	NaN%	Unknown	67/100
40	03109	Manchester	NH	NaN%	Unknown	67/100
41	03110	Bedford	NH	NaN%	Unknown	67/100
42	03215	Waterville Valley	NH	NaN%	Unknown	—
43	03216	Andover	NH	NaN%	Unknown	—
44	03217	Ashland	NH	NaN%	Unknown	—
45	03218	Barnstead	NH	NaN%	Unknown	—
46	03220	Belmont	NH	NaN%	Unknown	—
47	03221	Bradford	NH	NaN%	Unknown	—
48	03222	Bristol	NH	NaN%	Unknown	83/100
49	03223	Campton	NH	NaN%	Unknown	—
50	03224	Canterbury	NH	NaN%	Unknown	—
51	03225	Center Barnstead	NH	NaN%	Unknown	—
52	03226	Center Harbor	NH	NaN%	Unknown	—
53	03227	Center Sandwich	NH	NaN%	Unknown	—
54	03229	Contoocook	NH	NaN%	Unknown	81/100
55	03230	Danbury	NH	NaN%	Unknown	—
56	03231	East Andover	NH	NaN%	Unknown	—
57	03233	Elkins	NH	NaN%	Unknown	—
58	03234	Epsom	NH	NaN%	Unknown	—
59	03235	Franklin	NH	NaN%	Unknown	83/100
60	03237	Gilmanton	NH	NaN%	Unknown	—
61	03238	Glencliff	NH	NaN%	Unknown	—
62	03240	Grafton	NH	NaN%	Unknown	—
63	03241	Hebron	NH	NaN%	Unknown	—
64	03242	Henniker	NH	NaN%	Unknown	—
65	03243	Hill	NH	NaN%	Unknown	—
66	03244	Hillsborough	NH	NaN%	Unknown	—
67	03245	Holderness	NH	NaN%	Unknown	—
68	03246	Laconia	NH	NaN%	Unknown	82/100
69	03249	Gilford	NH	NaN%	Unknown	—
70	03251	Lincoln	NH	NaN%	Unknown	—
71	03253	Meredith	NH	NaN%	Unknown	—
72	03254	Moultonborough	NH	NaN%	Unknown	—
73	03255	Newbury	NH	NaN%	Unknown	—
74	03256	New Hampton	NH	NaN%	Unknown	—
75	03257	New London	NH	NaN%	Unknown	83/100
76	03258	Chichester	NH	NaN%	Unknown	—
77	03259	North Sandwich	NH	NaN%	Unknown	—
78	03260	North Sutton	NH	NaN%	Unknown	—
79	03261	Northwood	NH	NaN%	Unknown	—
80	03262	North Woodstock	NH	NaN%	Unknown	—
81	03263	Pittsfield	NH	NaN%	Unknown	—
82	03264	Plymouth	NH	NaN%	Unknown	83/100
83	03266	Rumney	NH	NaN%	Unknown	—
84	03268	Salisbury	NH	NaN%	Unknown	—
85	03269	Sanbornton	NH	NaN%	Unknown	—
86	03273	South Sutton	NH	NaN%	Unknown	—
87	03275	Suncook	NH	NaN%	Unknown	66/100
88	03276	Tilton	NH	NaN%	Unknown	—
89	03278	Warner	NH	NaN%	Unknown	—
90	03279	Warren	NH	NaN%	Unknown	—
91	03280	Washington	NH	NaN%	Unknown	—
92	03281	Weare	NH	NaN%	Unknown	—
93	03282	Wentworth	NH	NaN%	Unknown	—
94	03284	Springfield	NH	NaN%	Unknown	—
95	03285	Thornton	NH	NaN%	Unknown	—
96	03287	Wilmot	NH	NaN%	Unknown	—
97	03290	Nottingham	NH	NaN%	Unknown	—
98	03291	West Nottingham	NH	NaN%	Unknown	—
99	03293	Woodstock	NH	NaN%	Unknown	—
100	03301	Concord	NH	NaN%	Unknown	83/100

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: New Hampshire — 2026 Rankings