Worst Infrastructure: Wyoming — 2026 Rankings

Out of 195 ZIP codes with infrastructure data in Wyoming, 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	195
Highest risk	73%
Median risk	38%
Average risk	39%
State	Wyoming

Top 100 Highest Risk ZIP Codes

Rank	ZIP Code	City	State	Pipe Failure Risk	Risk Level	Safety Score
1	82332	Savery	WY	73%	Very High	40/100
2	82643	Midwest	WY	66%	Very High	66/100
3	82222	Lance Creek	WY	63%	Very High	13/100
4	82050	Albin	WY	59%	High	49/100
5	82224	Lost Springs	WY	59%	High	40/100
6	82240	Torrington	WY	59%	High	56/100
7	82215	Hartville	WY	56%	High	73/100
8	82301	Rawlins	WY	56%	High	62/100
9	82936	Lonetree	WY	56%	High	40/100
10	82083	Rock River	WY	55%	High	64/100
11	82218	Huntley	WY	55%	High	40/100
12	82323	Dixon	WY	55%	High	50/100
13	82440	Ralston	WY	55%	High	40/100
14	82217	Hawk Springs	WY	54%	High	40/100
15	82512	Crowheart	WY	54%	High	40/100
16	82945	Superior	WY	54%	High	56/100
17	82423	Frannie	WY	53%	High	64/100
18	82731	Weston	WY	53%	High	40/100
19	82219	Jay Em	WY	52%	High	53/100
20	82227	Manville	WY	52%	High	64/100
21	82321	Baggs	WY	52%	High	30/100
22	82327	Hanna	WY	52%	High	66/100
23	83121	Frontier	WY	52%	High	40/100
24	82001	Cheyenne	WY	50%	High	34/100
25	82845	Wyarno	WY	50%	High	40/100
26	83101	Kemmerer	WY	50%	High	36/100
27	83116	Diamondville	WY	50%	High	40/100
28	82329	Medicine Bow	WY	49%	High	32/100
29	82412	Byron	WY	49%	High	66/100
30	82515	Hudson	WY	49%	High	70/100
31	82051	Bosler	WY	48%	High	40/100
32	82059	Granite Canon	WY	48%	High	40/100
33	82081	Meriden	WY	48%	High	40/100
34	82221	Lagrange	WY	48%	High	40/100
35	82501	Riverton	WY	48%	High	54/100
36	82642	Lysite	WY	47%	High	40/100
37	82837	Leiter	WY	47%	High	40/100
38	82943	Reliance	WY	47%	High	40/100
39	83114	Cokeville	WY	47%	High	62/100
40	82322	Bairoil	WY	46%	High	65/100
41	82601	Casper	WY	46%	High	62/100
42	82801	Sheridan	WY	46%	High	43/100
43	82324	Elk Mountain	WY	45%	High	69/100
44	82433	Meeteetse	WY	45%	High	61/100
45	82434	Otto	WY	45%	High	40/100
46	82244	Yoder	WY	44%	High	70/100
47	82410	Basin	WY	44%	High	69/100
48	82430	Kirby	WY	44%	High	66/100
49	82443	Thermopolis	WY	44%	High	66/100
50	82523	Pavillion	WY	44%	High	54/100
51	82710	Aladdin	WY	44%	High	40/100
52	82925	Cora	WY	44%	High	40/100
53	82934	Granger	WY	44%	High	59/100
54	83011	Kelly	WY	44%	High	40/100
55	83115	Daniel	WY	44%	High	40/100
56	82082	Pine Bluffs	WY	43%	High	61/100
57	82201	Wheatland	WY	43%	High	78/100
58	82431	Lovell	WY	43%	High	57/100
59	82604	Casper	WY	43%	High	62/100
60	82844	Wolf	WY	43%	High	40/100
61	82310	Jeffrey City	WY	42%	High	65/100
62	82401	Worland	WY	42%	High	69/100
63	82428	Hyattville	WY	42%	High	66/100
64	82441	Shell	WY	42%	High	70/100
65	82644	Mills	WY	42%	High	67/100
66	82730	Upton	WY	42%	High	83/100
67	82938	Mc Kinnon	WY	42%	High	40/100
68	83120	Freedom	WY	42%	High	69/100
69	82225	Lusk	WY	41%	High	69/100
70	82334	Sinclair	WY	41%	High	65/100
71	82648	Powder River	WY	41%	High	40/100
72	82720	Hulett	WY	41%	High	66/100
73	82831	Arvada	WY	41%	High	40/100
74	82923	Boulder	WY	41%	High	40/100
75	82060	Hillsdale	WY	40%	Moderate	40/100
76	82063	Jelm	WY	40%	Moderate	40/100
77	82432	Manderson	WY	40%	Moderate	49/100
78	82729	Sundance	WY	40%	Moderate	66/100
79	82930	Evanston	WY	40%	Moderate	69/100
80	82931	Evanston	WY	40%	Moderate	65/100
81	83113	Big Piney	WY	40%	Moderate	61/100
82	82007	Cheyenne	WY	39%	Moderate	39/100
83	82055	Centennial	WY	39%	Moderate	65/100
84	82212	Fort Laramie	WY	39%	Moderate	66/100
85	82325	Encampment	WY	39%	Moderate	66/100
86	82510	Arapahoe	WY	39%	Moderate	40/100
87	82514	Fort Washakie	WY	39%	Moderate	40/100
88	82834	Buffalo	WY	39%	Moderate	63/100
89	82932	Farson	WY	39%	Moderate	65/100
90	82935	Green River	WY	39%	Moderate	69/100
91	83112	Bedford	WY	39%	Moderate	64/100
92	82070	Laramie	WY	38%	Moderate	69/100
93	82210	Chugwater	WY	38%	Moderate	72/100
94	82214	Guernsey	WY	38%	Moderate	80/100
95	82223	Lingle	WY	38%	Moderate	69/100
96	82331	Saratoga	WY	38%	Moderate	65/100
97	82421	Deaver	WY	38%	Moderate	66/100
98	82426	Greybull	WY	38%	Moderate	66/100
99	82520	Lander	WY	38%	Moderate	69/100
100	82635	Edgerton	WY	38%	Moderate	66/100

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: 2026-07-19.

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.