Worst Infrastructure: Colorado — 2026 Rankings

Out of 519 ZIP codes with infrastructure data in Colorado, 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	519
Highest risk	NaN%
Median risk	NaN%
Average risk	NaN%
State	Colorado

Top 100 Highest Risk ZIP Codes

Rank	ZIP Code	City	State	Pipe Failure Risk	Risk Level	Safety Score
1	80002	Arvada	CO	NaN%	Unknown	65/100
2	80003	Arvada	CO	NaN%	Unknown	64/100
3	80004	Arvada	CO	NaN%	Unknown	65/100
4	80005	Arvada	CO	NaN%	Unknown	64/100
5	80007	Arvada	CO	NaN%	Unknown	64/100
6	80010	Aurora	CO	NaN%	Unknown	67/100
7	80011	Aurora	CO	NaN%	Unknown	67/100
8	80012	Aurora	CO	NaN%	Unknown	66/100
9	80013	Aurora	CO	NaN%	Unknown	65/100
10	80014	Aurora	CO	NaN%	Unknown	66/100
11	80015	Aurora	CO	NaN%	Unknown	49/100
12	80016	Aurora	CO	NaN%	Unknown	39/100
13	80017	Aurora	CO	NaN%	Unknown	67/100
14	80018	Aurora	CO	NaN%	Unknown	65/100
15	80019	Aurora	CO	NaN%	Unknown	66/100
16	80020	Broomfield	CO	NaN%	Unknown	—
17	80021	Broomfield	CO	NaN%	Unknown	63/100
18	80022	Commerce City	CO	NaN%	Unknown	67/100
19	80023	Broomfield	CO	NaN%	Unknown	—
20	80024	Dupont	CO	NaN%	Unknown	67/100
21	80025	Eldorado Springs	CO	NaN%	Unknown	—
22	80026	Lafayette	CO	NaN%	Unknown	51/100
23	80027	Louisville	CO	NaN%	Unknown	60/100
24	80030	Westminster	CO	NaN%	Unknown	64/100
25	80031	Westminster	CO	NaN%	Unknown	66/100
26	80033	Wheat Ridge	CO	NaN%	Unknown	65/100
27	80045	Aurora	CO	NaN%	Unknown	67/100
28	80101	Agate	CO	NaN%	Unknown	—
29	80102	Bennett	CO	NaN%	Unknown	67/100
30	80103	Byers	CO	NaN%	Unknown	—
31	80104	Castle Rock	CO	NaN%	Unknown	64/100
32	80105	Deer Trail	CO	NaN%	Unknown	—
33	80106	Elbert	CO	NaN%	Unknown	—
34	80107	Elizabeth	CO	NaN%	Unknown	—
35	80108	Castle Rock	CO	NaN%	Unknown	41/100
36	80109	Castle Rock	CO	NaN%	Unknown	63/100
37	80110	Englewood	CO	NaN%	Unknown	63/100
38	80111	Englewood	CO	NaN%	Unknown	48/100
39	80112	Englewood	CO	NaN%	Unknown	47/100
40	80113	Englewood	CO	NaN%	Unknown	64/100
41	80116	Franktown	CO	NaN%	Unknown	61/100
42	80117	Kiowa	CO	NaN%	Unknown	—
43	80118	Larkspur	CO	NaN%	Unknown	50/100
44	80120	Littleton	CO	NaN%	Unknown	64/100
45	80121	Littleton	CO	NaN%	Unknown	64/100
46	80122	Littleton	CO	NaN%	Unknown	67/100
47	80123	Littleton	CO	NaN%	Unknown	63/100
48	80124	Lone Tree	CO	NaN%	Unknown	48/100
49	80125	Littleton	CO	NaN%	Unknown	64/100
50	80126	Littleton	CO	NaN%	Unknown	67/100
51	80127	Littleton	CO	NaN%	Unknown	53/100
52	80128	Littleton	CO	NaN%	Unknown	67/100
53	80129	Littleton	CO	NaN%	Unknown	67/100
54	80130	Littleton	CO	NaN%	Unknown	67/100
55	80131	Louviers	CO	NaN%	Unknown	—
56	80132	Monument	CO	NaN%	Unknown	52/100
57	80133	Palmer Lake	CO	NaN%	Unknown	—
58	80134	Parker	CO	NaN%	Unknown	41/100
59	80135	Sedalia	CO	NaN%	Unknown	—
60	80136	Strasburg	CO	NaN%	Unknown	—
61	80137	Watkins	CO	NaN%	Unknown	67/100
62	80138	Parker	CO	NaN%	Unknown	44/100
63	80202	Denver	CO	NaN%	Unknown	66/100
64	80203	Denver	CO	NaN%	Unknown	66/100
65	80204	Denver	CO	NaN%	Unknown	66/100
66	80205	Denver	CO	NaN%	Unknown	66/100
67	80206	Denver	CO	NaN%	Unknown	66/100
68	80207	Denver	CO	NaN%	Unknown	66/100
69	80209	Denver	CO	NaN%	Unknown	66/100
70	80210	Denver	CO	NaN%	Unknown	63/100
71	80211	Denver	CO	NaN%	Unknown	66/100
72	80212	Denver	CO	NaN%	Unknown	66/100
73	80214	Denver	CO	NaN%	Unknown	66/100
74	80215	Denver	CO	NaN%	Unknown	67/100
75	80216	Denver	CO	NaN%	Unknown	63/100
76	80218	Denver	CO	NaN%	Unknown	66/100
77	80219	Denver	CO	NaN%	Unknown	63/100
78	80220	Denver	CO	NaN%	Unknown	66/100
79	80221	Denver	CO	NaN%	Unknown	45/100
80	80222	Denver	CO	NaN%	Unknown	66/100
81	80223	Denver	CO	NaN%	Unknown	63/100
82	80224	Denver	CO	NaN%	Unknown	66/100
83	80226	Denver	CO	NaN%	Unknown	65/100
84	80227	Denver	CO	NaN%	Unknown	65/100
85	80228	Denver	CO	NaN%	Unknown	65/100
86	80229	Denver	CO	NaN%	Unknown	47/100
87	80230	Denver	CO	NaN%	Unknown	66/100
88	80231	Denver	CO	NaN%	Unknown	66/100
89	80232	Denver	CO	NaN%	Unknown	65/100
90	80233	Denver	CO	NaN%	Unknown	47/100
91	80234	Denver	CO	NaN%	Unknown	53/100
92	80235	Denver	CO	NaN%	Unknown	66/100
93	80236	Denver	CO	NaN%	Unknown	63/100
94	80237	Denver	CO	NaN%	Unknown	66/100
95	80238	Denver	CO	NaN%	Unknown	66/100
96	80239	Denver	CO	NaN%	Unknown	66/100
97	80241	Thornton	CO	NaN%	Unknown	47/100
98	80246	Denver	CO	NaN%	Unknown	65/100
99	80247	Denver	CO	NaN%	Unknown	66/100
100	80249	Denver	CO	NaN%	Unknown	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: 2026-08-31.

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.