2026 Rankings

Highest Radon Risk ZIP Codes in Minnesota — 2026

Last updated: June 4, 2026

731 ZIP codes ranked by Radon Zone #1: ZIP 55335 (Gibbon, MN) — Zone 1 (High)
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 731 ZIP codes with data in Minnesota, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes with Highest Radon Risk | All Minnesota Rankings

Statistic Value
ZIP codes ranked 731
Lowest value Zone 1 (High)
Median value Zone 1 (High)
State Minnesota

100 Lowest-Ranked ZIP Codes

Rank ZIP Code City State Radon Zone Safety Score
1 55335 Gibbon MN Zone 1 (High) 33/100
2 55349 Howard Lake MN Zone 1 (High) 33/100
3 55575 Howard Lake MN Zone 1 (High) 33/100
4 56131 Fulda MN Zone 1 (High) 33/100
5 56727 Grygla MN Zone 1 (High) 33/100
6 56716 Crookston MN Zone 1 (High) 35/100
7 56735 Lancaster MN Zone 1 (High) 37/100
8 56537 Fergus Falls MN Zone 1 (High) 38/100
9 56538 Fergus Falls MN Zone 1 (High) 38/100
10 55010 Castle Rock MN Zone 1 (High) 40/100
11 55020 Elko New Market MN Zone 1 (High) 40/100
12 55054 Elko New Market MN Zone 1 (High) 40/100
13 55120 Saint Paul MN Zone 1 (High) 40/100
14 55121 Saint Paul MN Zone 1 (High) 40/100
15 55129 Saint Paul MN Zone 1 (High) 40/100
16 55146 Saint Paul MN Zone 1 (High) 40/100
17 55341 Hanover MN Zone 1 (High) 40/100
18 55375 Saint Bonifacius MN Zone 1 (High) 40/100
19 55377 Santiago MN Zone 1 (High) 40/100
20 55380 Silver Creek MN Zone 1 (High) 40/100
21 55383 Norwood MN Zone 1 (High) 40/100
22 55392 Navarre MN Zone 1 (High) 40/100
23 55550 Young America MN Zone 1 (High) 40/100
24 55551 Young America MN Zone 1 (High) 40/100
25 55553 Young America MN Zone 1 (High) 40/100
26 55554 Norwood MN Zone 1 (High) 40/100
27 55558 Young America MN Zone 1 (High) 40/100
28 55568 Young America MN Zone 1 (High) 40/100
29 55572 Rockford MN Zone 1 (High) 40/100
30 55573 Young America MN Zone 1 (High) 40/100
31 55577 Rockford MN Zone 1 (High) 40/100
32 55583 Norwood MN Zone 1 (High) 40/100
33 55594 Young America MN Zone 1 (High) 40/100
34 55947 La Crescent MN Zone 1 (High) 40/100
35 55968 Reads Landing MN Zone 1 (High) 40/100
36 55977 Taopi MN Zone 1 (High) 40/100
37 56030 Essig MN Zone 1 (High) 40/100
38 56046 Hope MN Zone 1 (High) 40/100
39 56047 Huntley MN Zone 1 (High) 40/100
40 56056 La Salle MN Zone 1 (High) 40/100
41 56084 Searles MN Zone 1 (High) 40/100
42 56146 Kanaranzi MN Zone 1 (High) 40/100
43 56210 Barry MN Zone 1 (High) 40/100
44 56226 Clontarf MN Zone 1 (High) 40/100
45 56231 Danvers MN Zone 1 (High) 40/100
46 56287 Seaforth MN Zone 1 (High) 40/100
47 56289 Sunburg MN Zone 1 (High) 40/100
48 56318 Burtrum MN Zone 1 (High) 40/100
49 56325 Elrosa MN Zone 1 (High) 40/100
50 56335 Greenwald MN Zone 1 (High) 40/100
51 56341 Holmes City MN Zone 1 (High) 40/100
52 56355 Nelson MN Zone 1 (High) 40/100
53 56371 Roscoe MN Zone 1 (High) 40/100
54 56374 Saint Joseph MN Zone 1 (High) 40/100
55 56376 Saint Martin MN Zone 1 (High) 40/100
56 56385 Villard MN Zone 1 (High) 40/100
57 56389 West Union MN Zone 1 (High) 40/100
58 56434 Aldrich MN Zone 1 (High) 40/100
59 56436 Benedict MN Zone 1 (High) 40/100
60 56458 Lake George MN Zone 1 (High) 40/100
61 56501 Detroit Lakes MN Zone 1 (High) 40/100
62 56518 Bluffton MN Zone 1 (High) 40/100
63 56533 Elizabeth MN Zone 1 (High) 40/100
64 56543 Foxhome MN Zone 1 (High) 40/100
65 56565 Nashua MN Zone 1 (High) 40/100
66 56566 Naytahwaush MN Zone 1 (High) 40/100
67 56570 Osage MN Zone 1 (High) 40/100
68 56572 Pelican Rapids MN Zone 1 (High) 40/100
69 56577 Richwood MN Zone 1 (High) 40/100
70 56578 Rochert MN Zone 1 (High) 40/100
71 56588 Vining MN Zone 1 (High) 40/100
72 56591 White Earth MN Zone 1 (High) 40/100
73 56593 Wolf Lake MN Zone 1 (High) 40/100
74 56651 Lengby MN Zone 1 (High) 40/100
75 56673 Roosevelt MN Zone 1 (High) 40/100
76 56682 Swift MN Zone 1 (High) 40/100
77 56684 Trail MN Zone 1 (High) 40/100
78 56711 Angle Inlet MN Zone 1 (High) 40/100
79 56724 Gatzke MN Zone 1 (High) 40/100
80 56741 Oak Island MN Zone 1 (High) 40/100
81 56754 Saint Hilaire MN Zone 1 (High) 40/100
82 56759 Strathcona MN Zone 1 (High) 40/100
83 56009 Alden MN Zone 1 (High) 42/100
84 56010 Amboy MN Zone 1 (High) 42/100
85 56115 Balaton MN Zone 1 (High) 43/100
86 56360 Osakis MN Zone 1 (High) 44/100
87 55001 Afton MN Zone 1 (High) 45/100
88 55026 Frontenac MN Zone 1 (High) 45/100
89 55089 Welch MN Zone 1 (High) 45/100
90 55107 Saint Paul MN Zone 1 (High) 45/100
91 55110 Saint Paul MN Zone 1 (High) 45/100
92 55118 Saint Paul MN Zone 1 (High) 45/100
93 55972 Saint Charles MN Zone 1 (High) 45/100
94 56034 Garden City MN Zone 1 (High) 45/100
95 56058 Le Sueur MN Zone 1 (High) 45/100
96 56082 Saint Peter MN Zone 1 (High) 45/100
97 56219 Browns Valley MN Zone 1 (High) 45/100
98 56230 Danube MN Zone 1 (High) 45/100
99 56253 Lake Lillian MN Zone 1 (High) 45/100
100 56267 Morris MN Zone 1 (High) 45/100

Methodology

Radon rankings are based on EPA county-level radon zone classifications. Zone 1 (highest risk) has predicted average indoor radon levels above 4 pCi/L — the EPA action level. Zone 2 is moderate (2-4 pCi/L) and Zone 3 is low (below 2 pCi/L). Within Zone 1, ZIP codes are sub-ranked by Home Safety Score to prioritize areas with compounding risk factors.

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: 2026-06-04.

Frequently Asked Questions

What is EPA Radon Zone 1?

Zone 1 is the EPA highest-risk classification, meaning the county has predicted average indoor radon levels above 4 pCi/L — the level at which the EPA recommends mitigation. Radon causes about 21,000 lung cancer deaths per year in the U.S.

Should I test for radon?

The EPA recommends testing all homes regardless of radon zone. A DIY test kit costs $15-40. Professional testing costs $150-250. If levels exceed 4 pCi/L, mitigation systems ($800-2,500) can reduce radon by up to 99%.

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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