2026 Rankings

Lowest Home Safety Scores in Colorado — 2026

Last updated: August 14, 2026

221 ZIP codes ranked by Safety Score #1: ZIP 80550 (Windsor, CO) - 31/100
Lead Violations Lowest Score Safest Flood Risk Energy Cost Radon PFAS Reliability EJ Index Homebuyer Risk CO & Gas Safest Gas Remediation Burden Unresolved Violations (by Utility) Water Equity (by Utility)

Out of 221 ZIP codes with data in Colorado, these are the lowest-ranked areas for safety score. See also: National Lowest Home Safety Scores in America | All Colorado Rankings

Statistic Value
ZIP codes ranked 221
Lowest value 31/100
Median value 64/100
State Colorado

100 Lowest-Ranked ZIP Codes

Rank ZIP Code City State Safety Score Safety Score
1 80550 Windsor CO 31/100 31/100
2 80260 Denver CO 33/100 33/100
3 80537 Loveland CO 33/100 33/100
4 80817 Fountain CO 33/100 33/100
5 81435 Telluride CO 33/100 33/100
6 80651 Platteville CO 34/100 34/100
7 80504 Longmont CO 35/100 35/100
8 80534 Johnstown CO 35/100 35/100
9 80543 Milliken CO 36/100 36/100
10 80538 Loveland CO 38/100 38/100
11 80016 Aurora CO 39/100 39/100
12 80108 Castle Rock CO 41/100 41/100
13 80134 Parker CO 41/100 41/100
14 80603 Brighton CO 41/100 41/100
15 80542 Mead CO 42/100 42/100
16 80621 Fort Lupton CO 42/100 42/100
17 80138 Parker CO 44/100 44/100
18 80911 Colorado Springs CO 44/100 44/100
19 80221 Denver CO 45/100 45/100
20 80513 Berthoud CO 45/100 45/100
21 80602 Brighton CO 45/100 45/100
22 80112 Englewood CO 47/100 47/100
23 80229 Denver CO 47/100 47/100
24 80233 Denver CO 47/100 47/100
25 80241 Thornton CO 47/100 47/100
26 80601 Brighton CO 47/100 47/100
27 80640 Henderson CO 47/100 47/100
28 80925 Colorado Springs CO 47/100 47/100
29 80111 Englewood CO 48/100 48/100
30 80124 Lone Tree CO 48/100 48/100
31 80928 Colorado Springs CO 48/100 48/100
32 80951 Colorado Springs CO 48/100 48/100
33 80015 Aurora CO 49/100 49/100
34 80503 Longmont CO 49/100 49/100
35 80615 Eaton CO 49/100 49/100
36 80645 La Salle CO 49/100 49/100
37 80915 Colorado Springs CO 49/100 49/100
38 80922 Colorado Springs CO 49/100 49/100
39 80118 Larkspur CO 50/100 50/100
40 80301 Boulder CO 50/100 50/100
41 80401 Golden CO 50/100 50/100
42 80439 Evergreen CO 50/100 50/100
43 80465 Morrison CO 50/100 50/100
44 80516 Erie CO 50/100 50/100
45 80517 Estes Park CO 50/100 50/100
46 80524 Fort Collins CO 50/100 50/100
47 80631 Greeley CO 50/100 50/100
48 80831 Peyton CO 50/100 50/100
49 80903 Colorado Springs CO 50/100 50/100
50 80906 Colorado Springs CO 50/100 50/100
51 80908 Colorado Springs CO 50/100 50/100
52 80910 Colorado Springs CO 50/100 50/100
53 80926 Colorado Springs CO 50/100 50/100
54 80939 Colorado Springs CO 50/100 50/100
55 81004 Pueblo CO 50/100 50/100
56 81230 Gunnison CO 50/100 50/100
57 80026 Lafayette CO 51/100 51/100
58 80132 Monument CO 52/100 52/100
59 80612 Carr CO 52/100 52/100
60 80127 Littleton CO 53/100 53/100
61 80234 Denver CO 53/100 53/100
62 80634 Greeley CO 53/100 53/100
63 81001 Pueblo CO 53/100 53/100
64 81006 Pueblo CO 53/100 53/100
65 80514 Dacono CO 54/100 54/100
66 80921 Colorado Springs CO 54/100 54/100
67 81226 Florence CO 55/100 55/100
68 81419 Hotchkiss CO 55/100 55/100
69 80520 Firestone CO 56/100 56/100
70 80530 Frederick CO 56/100 56/100
71 80610 Ault CO 56/100 56/100
72 80620 Evans CO 56/100 56/100
73 80650 Pierce CO 56/100 56/100
74 80305 Boulder CO 57/100 57/100
75 80535 Laporte CO 57/100 57/100
76 80549 Wellington CO 57/100 57/100
77 80642 Hudson CO 57/100 57/100
78 80525 Fort Collins CO 58/100 58/100
79 80624 Gill CO 58/100 58/100
80 80644 Kersey CO 58/100 58/100
81 81520 Clifton CO 58/100 58/100
82 81526 Palisade CO 58/100 58/100
83 81611 Aspen CO 58/100 58/100
84 81623 Carbondale CO 58/100 58/100
85 80521 Fort Collins CO 59/100 59/100
86 80526 Fort Collins CO 59/100 59/100
87 81212 Canon City CO 59/100 59/100
88 80027 Louisville CO 60/100 60/100
89 80303 Boulder CO 60/100 60/100
90 80547 Timnath CO 60/100 60/100
91 81003 Pueblo CO 60/100 60/100
92 81007 Pueblo CO 60/100 60/100
93 81008 Pueblo CO 60/100 60/100
94 81615 Snowmass Village CO 60/100 60/100
95 80116 Franktown CO 61/100 61/100
96 81650 Rifle CO 61/100 61/100
97 80512 Bellvue CO 62/100 62/100
98 80528 Fort Collins CO 62/100 62/100
99 80021 Broomfield CO 63/100 63/100
100 80109 Castle Rock CO 63/100 63/100

Methodology

Home Safety Score model 4.0.0 combines SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, county-level EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the 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: 2026-08-14.

Frequently Asked Questions

What does a low Home Safety Score mean?

A score below 40 (grade F) means the four measured model components produced a low combined result. It does not claim that every property hazard was measured.

Can a ZIP code score change?

Yes. A later accepted release can change the score when any measured component changes. Every release identifies its score model and source periods.

Explore More Rankings

How this ranking is calculated, data sources, and limitations: Rankings Methodology →

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Disclaimer: Rankings are based on EPA, FEMA, and federal agency data. They reflect historical patterns and risk indicators, not necessarily current conditions. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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