Highest Radon Risk ZIP Codes in Michigan — 2026

Out of 133 ZIP codes with data in Michigan, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes with Highest Radon Risk | All Michigan Rankings

Statistic	Value
ZIP codes ranked	133
Lowest value	Zone 1 (High)
Median value	Zone 1 (High)
State	Michigan

100 Lowest-Ranked ZIP Codes

Rank	ZIP Code	City	State	Radon Zone	Safety Score
1	49016	Battle Creek	MI	Zone 1 (High)	33/100
2	49018	Battle Creek	MI	Zone 1 (High)	33/100
3	48115	Bridgewater	MI	Zone 1 (High)	40/100
4	49014	Battle Creek	MI	Zone 1 (High)	40/100
5	49015	Battle Creek	MI	Zone 1 (High)	40/100
6	49020	Bedford	MI	Zone 1 (High)	40/100
7	49052	Fulton	MI	Zone 1 (High)	40/100
8	49066	Leonidas	MI	Zone 1 (High)	40/100
9	49088	Scotts	MI	Zone 1 (High)	40/100
10	49089	Sherwood	MI	Zone 1 (High)	40/100
11	49095	Vandalia	MI	Zone 1 (High)	40/100
12	49227	Allen	MI	Zone 1 (High)	40/100
13	49233	Cement City	MI	Zone 1 (High)	40/100
14	49234	Clarklake	MI	Zone 1 (High)	40/100
15	49235	Clayton	MI	Zone 1 (High)	40/100
16	49239	Frontier	MI	Zone 1 (High)	40/100
17	49241	Hanover	MI	Zone 1 (High)	40/100
18	49246	Horton	MI	Zone 1 (High)	40/100
19	49249	Jerome	MI	Zone 1 (High)	40/100
20	49253	Manitou Beach	MI	Zone 1 (High)	40/100
21	49255	Montgomery	MI	Zone 1 (High)	40/100
22	49257	Moscow	MI	Zone 1 (High)	40/100
23	49258	Mosherville	MI	Zone 1 (High)	40/100
24	49262	North Adams	MI	Zone 1 (High)	40/100
25	49263	Norvell	MI	Zone 1 (High)	40/100
26	49266	Osseo	MI	Zone 1 (High)	40/100
27	49271	Pittsford	MI	Zone 1 (High)	40/100
28	49279	Sand Creek	MI	Zone 1 (High)	40/100
29	49281	Somerset	MI	Zone 1 (High)	40/100
30	49283	Spring Arbor	MI	Zone 1 (High)	40/100
31	49287	Tipton	MI	Zone 1 (High)	40/100
32	49289	Weston	MI	Zone 1 (High)	40/100
33	49240	Grass Lake	MI	Zone 1 (High)	41/100
34	49097	Vicksburg	MI	Zone 1 (High)	43/100
35	49031	Cassopolis	MI	Zone 1 (High)	44/100
36	49037	Battle Creek	MI	Zone 1 (High)	45/100
37	49254	Michigan Center	MI	Zone 1 (High)	45/100
38	49060	Hickory Corners	MI	Zone 1 (High)	47/100
39	49245	Homer	MI	Zone 1 (High)	48/100
40	48025	Franklin	MI	Zone 1 (High)	53/100
41	48139	Hamburg	MI	Zone 1 (High)	53/100
42	48143	Lakeland	MI	Zone 1 (High)	53/100
43	48191	Willis	MI	Zone 1 (High)	53/100
44	49029	Burlington	MI	Zone 1 (High)	53/100
45	49033	Ceresco	MI	Zone 1 (High)	53/100
46	49051	East Leroy	MI	Zone 1 (High)	53/100
47	49069	Marshall	MI	Zone 1 (High)	53/100
48	49083	Richland	MI	Zone 1 (High)	53/100
49	49130	Union	MI	Zone 1 (High)	53/100
50	49001	Kalamazoo	MI	Zone 1 (High)	54/100
51	49011	Athens	MI	Zone 1 (High)	54/100
52	49048	Kalamazoo	MI	Zone 1 (High)	54/100
53	49093	Three Rivers	MI	Zone 1 (High)	54/100
54	49220	Addison	MI	Zone 1 (High)	54/100
55	49229	Britton	MI	Zone 1 (High)	54/100
56	49236	Clinton	MI	Zone 1 (High)	54/100
57	49261	Napoleon	MI	Zone 1 (High)	54/100
58	49087	Schoolcraft	MI	Zone 1 (High)	55/100
59	49092	Tekonsha	MI	Zone 1 (High)	55/100
60	49269	Parma	MI	Zone 1 (High)	55/100
61	49276	Riga	MI	Zone 1 (High)	55/100
62	49282	Somerset Center	MI	Zone 1 (High)	55/100
63	49288	Waldron	MI	Zone 1 (High)	55/100
64	48118	Chelsea	MI	Zone 1 (High)	57/100
65	49040	Colon	MI	Zone 1 (High)	57/100
66	49012	Augusta	MI	Zone 1 (High)	58/100
67	49238	Deerfield	MI	Zone 1 (High)	58/100
68	49007	Kalamazoo	MI	Zone 1 (High)	59/100
69	49009	Kalamazoo	MI	Zone 1 (High)	59/100
70	49036	Coldwater	MI	Zone 1 (High)	59/100
71	49268	Palmyra	MI	Zone 1 (High)	59/100
72	48103	Ann Arbor	MI	Zone 1 (High)	60/100
73	48104	Ann Arbor	MI	Zone 1 (High)	60/100
74	49003	Kalamazoo	MI	Zone 1 (High)	60/100
75	49005	Kalamazoo	MI	Zone 1 (High)	60/100
76	49019	Kalamazoo	MI	Zone 1 (High)	60/100
77	49042	Constantine	MI	Zone 1 (High)	60/100
78	49068	Marshall	MI	Zone 1 (High)	60/100
79	48106	Ann Arbor	MI	Zone 1 (High)	61/100
80	48107	Ann Arbor	MI	Zone 1 (High)	61/100
81	48109	Ann Arbor	MI	Zone 1 (High)	61/100
82	48113	Ann Arbor	MI	Zone 1 (High)	61/100
83	49030	Burr Oak	MI	Zone 1 (High)	61/100
84	49072	Mendon	MI	Zone 1 (High)	61/100
85	49075	Nottawa	MI	Zone 1 (High)	61/100
86	49081	Portage	MI	Zone 1 (High)	61/100
87	49247	Hudson	MI	Zone 1 (High)	61/100
88	49094	Union City	MI	Zone 1 (High)	62/100
89	49252	Litchfield	MI	Zone 1 (High)	62/100
90	49203	Jackson	MI	Zone 1 (High)	63/100
91	49232	Camden	MI	Zone 1 (High)	63/100
92	48189	Whitmore Lake	MI	Zone 1 (High)	64/100
93	48197	Ypsilanti	MI	Zone 1 (High)	64/100
94	49004	Kalamazoo	MI	Zone 1 (High)	64/100
95	49006	Kalamazoo	MI	Zone 1 (High)	64/100
96	49008	Kalamazoo	MI	Zone 1 (High)	64/100
97	49047	Dowagiac	MI	Zone 1 (High)	64/100
98	49221	Adrian	MI	Zone 1 (High)	64/100
99	49230	Brooklyn	MI	Zone 1 (High)	64/100
100	49248	Jasper	MI	Zone 1 (High)	64/100

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%.