2026 Rankings

Highest Radon Risk ZIP Codes in South Dakota — 2026

Last updated: June 4, 2026

282 ZIP codes ranked by Radon Zone #1: ZIP 57027 (Fairview, SD) — 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 282 ZIP codes with data in South Dakota, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes with Highest Radon Risk | All South Dakota Rankings

Statistic Value
ZIP codes ranked 282
Lowest value Zone 1 (High)
Median value Zone 1 (High)
State South Dakota

100 Lowest-Ranked ZIP Codes

Rank ZIP Code City State Radon Zone Safety Score
1 57027 Fairview SD Zone 1 (High) 40/100
2 57041 Lyons SD Zone 1 (High) 40/100
3 57047 Monroe SD Zone 1 (High) 40/100
4 57052 Olivet SD Zone 1 (High) 40/100
5 57054 Ramona SD Zone 1 (High) 40/100
6 57055 Renner SD Zone 1 (High) 40/100
7 57057 Rutland SD Zone 1 (High) 40/100
8 57061 Sinai SD Zone 1 (High) 40/100
9 57067 Utica SD Zone 1 (High) 40/100
10 57218 Brandt SD Zone 1 (High) 40/100
11 57224 Claire City SD Zone 1 (High) 40/100
12 57233 Erwin SD Zone 1 (High) 40/100
13 57238 Goodwin SD Zone 1 (High) 40/100
14 57242 Hazel SD Zone 1 (High) 40/100
15 57245 Kranzburg SD Zone 1 (High) 40/100
16 57246 Labolt SD Zone 1 (High) 40/100
17 57251 Marvin SD Zone 1 (High) 40/100
18 57256 Ortley SD Zone 1 (High) 40/100
19 57257 Peever SD Zone 1 (High) 40/100
20 57258 Raymond SD Zone 1 (High) 40/100
21 57264 Stockholm SD Zone 1 (High) 40/100
22 57265 Strandburg SD Zone 1 (High) 40/100
23 57268 Toronto SD Zone 1 (High) 40/100
24 57269 Twin Brooks SD Zone 1 (High) 40/100
25 57312 Alpena SD Zone 1 (High) 40/100
26 57323 Carthage SD Zone 1 (High) 40/100
27 57329 Dante SD Zone 1 (High) 40/100
28 57331 Dimock SD Zone 1 (High) 40/100
29 57337 Fedora SD Zone 1 (High) 40/100
30 57339 Fort Thompson SD Zone 1 (High) 40/100
31 57340 Fulton SD Zone 1 (High) 40/100
32 57341 Gann Valley SD Zone 1 (High) 40/100
33 57342 Geddes SD Zone 1 (High) 40/100
34 57344 Harrison SD Zone 1 (High) 40/100
35 57346 Stephan SD Zone 1 (High) 40/100
36 57348 Hitchcock SD Zone 1 (High) 40/100
37 57354 Kaylor SD Zone 1 (High) 40/100
38 57358 Lane SD Zone 1 (High) 40/100
39 57364 New Holland SD Zone 1 (High) 40/100
40 57371 Ree Heights SD Zone 1 (High) 40/100
41 57379 Virgil SD Zone 1 (High) 40/100
42 57386 Yale SD Zone 1 (High) 40/100
43 57420 Akaska SD Zone 1 (High) 40/100
44 57422 Andover SD Zone 1 (High) 40/100
45 57426 Barnard SD Zone 1 (High) 40/100
46 57455 Lebanon SD Zone 1 (High) 40/100
47 57457 Long Lake SD Zone 1 (High) 40/100
48 57460 Mansfield SD Zone 1 (High) 40/100
49 57466 Onaka SD Zone 1 (High) 40/100
50 57467 Orient SD Zone 1 (High) 40/100
51 57470 Rockham SD Zone 1 (High) 40/100
52 57520 Agar SD Zone 1 (High) 40/100
53 57534 Hamill SD Zone 1 (High) 40/100
54 57536 Harrold SD Zone 1 (High) 40/100
55 57540 Holabird SD Zone 1 (High) 40/100
56 57548 Lower Brule SD Zone 1 (High) 40/100
57 57569 Reliance SD Zone 1 (High) 40/100
58 57576 Vivian SD Zone 1 (High) 40/100
59 57634 Keldron SD Zone 1 (High) 40/100
60 57640 Lodgepole SD Zone 1 (High) 40/100
61 57642 Mc Laughlin SD Zone 1 (High) 40/100
62 57644 Meadow SD Zone 1 (High) 40/100
63 57649 Prairie City SD Zone 1 (High) 40/100
64 57659 Walker SD Zone 1 (High) 40/100
65 57660 Watauga SD Zone 1 (High) 40/100
66 57322 Carpenter SD Zone 1 (High) 44/100
67 57016 Chester SD Zone 1 (High) 45/100
68 57021 Davis SD Zone 1 (High) 45/100
69 57058 Salem SD Zone 1 (High) 45/100
70 57075 Wentworth SD Zone 1 (High) 45/100
71 57220 Bruce SD Zone 1 (High) 45/100
72 57369 Platte SD Zone 1 (High) 45/100
73 57424 Ashton SD Zone 1 (High) 45/100
74 57522 Blunt SD Zone 1 (High) 45/100
75 57263 South Shore SD Zone 1 (High) 48/100
76 57006 Brookings SD Zone 1 (High) 49/100
77 57401 Aberdeen SD Zone 1 (High) 49/100
78 57007 Brookings SD Zone 1 (High) 52/100
79 57010 Burbank SD Zone 1 (High) 53/100
80 57050 Nunda SD Zone 1 (High) 53/100
81 57051 Oldham SD Zone 1 (High) 53/100
82 57076 Winfred SD Zone 1 (High) 53/100
83 57217 Bradley SD Zone 1 (High) 53/100
84 57247 Lake City SD Zone 1 (High) 53/100
85 57259 Revillo SD Zone 1 (High) 53/100
86 57271 Vienna SD Zone 1 (High) 53/100
87 57361 Marty SD Zone 1 (High) 53/100
88 57370 Pukwana SD Zone 1 (High) 53/100
89 57373 Saint Lawrence SD Zone 1 (High) 53/100
90 57421 Amherst SD Zone 1 (High) 53/100
91 57432 Claremont SD Zone 1 (High) 53/100
92 57433 Columbia SD Zone 1 (High) 53/100
93 57436 Doland SD Zone 1 (High) 53/100
94 57439 Ferney SD Zone 1 (High) 53/100
95 57449 Houghton SD Zone 1 (High) 53/100
96 57461 Mellette SD Zone 1 (High) 53/100
97 57476 Tulare SD Zone 1 (High) 53/100
98 57477 Turton SD Zone 1 (High) 53/100
99 57544 Kennebec SD Zone 1 (High) 53/100
100 57646 Mound City SD Zone 1 (High) 53/100

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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