Michigan Cities Ranked by Indoor Radon Levels

Measured averages from Airthings devices across Michigan, USA. Action level: 4 pCi/L — the threshold at which remediation is recommended.

Hillsdale has the highest measured indoor radon in Michigan at 9.3 pCi/L, based on Airthings measurements across 231 cities.

Updated August 16, 2026

Highest city

9.3pCi/L

Hillsdale

Michigan city average

2.3pCi/L

across 231 cities

Above action level

17/ 231

cities

Michigan Cities Ranked by Indoor Radon Levels
#	Location	Avg level	Monitors	vs action level
1	Hillsdale	9.3 pCi/L	8	2.3× over
2	Gwinn	8.2 pCi/L	10	2.1× over
3	Gladstone	7.8 pCi/L	6	2.0× over
4	Coldwater	7.7 pCi/L	7	1.9× over
5	West Monroe	7.2 pCi/L	9	1.8× over
6	Escanaba	6.9 pCi/L	11	1.7× over
7	Manitou Beach-Devils Lake	6.5 pCi/L	7	1.6× over
8	Brooklyn	6.0 pCi/L	9	1.5× over
9	Carleton	5.8 pCi/L	7	1.4× over
10	Grass Lake	5.0 pCi/L	13	1.2× over
11	Allegan	4.8 pCi/L	6	1.2× over
12	Lapeer	4.7 pCi/L	19	1.2× over
13	Bath	4.5 pCi/L	7	1.1× over
14	Leslie	4.2 pCi/L	8	1.1× over
15	Chelsea	4.1 pCi/L	35	1.0× over
16	Parchment	4.0 pCi/L	6	1.0× over
17	Stockbridge	4.0 pCi/L	10	1.0× over
✓ Below EPA action level (4 pCi/L)
18	DeWitt	3.9 pCi/L	30	1.0× under
19	Gaylord	3.8 pCi/L	20	0.9× under
20	Portland	3.7 pCi/L	8	0.9× under
21	Saint Johns	3.7 pCi/L	10	0.9× under
22	Jenison	3.6 pCi/L	23	0.9× under
23	Pinckney	3.6 pCi/L	33	0.9× under
24	Middleville	3.6 pCi/L	8	0.9× under
25	Adrian	3.4 pCi/L	9	0.8× under
26	Montrose	3.4 pCi/L	6	0.8× under
27	Jackson	3.3 pCi/L	23	0.8× under
28	Allen Park	3.3 pCi/L	21	0.8× under
29	Grosse Ile	3.2 pCi/L	45	0.8× under
30	Holly	3.2 pCi/L	24	0.8× under
31	Williamston	3.2 pCi/L	14	0.8× under
32	Oxford	3.2 pCi/L	72	0.8× under
33	Buchanan	3.1 pCi/L	12	0.8× under
34	Ecorse	3.1 pCi/L	23	0.8× under
35	Walled Lake	3.1 pCi/L	29	0.8× under
36	Rochester Hills	3.1 pCi/L	75	0.8× under
37	Fenton	3.0 pCi/L	30	0.8× under
38	Romeo	3.0 pCi/L	36	0.8× under
39	Clarkston	3.0 pCi/L	96	0.8× under
40	Marshall	3.0 pCi/L	13	0.7× under
41	Argentine	3.0 pCi/L	20	0.7× under
42	Grosse Pointe	3.0 pCi/L	95	0.7× under
43	Iron Mountain	2.9 pCi/L	13	0.7× under
44	Manchester	2.9 pCi/L	11	0.7× under
45	Plainwell	2.9 pCi/L	6	0.7× under
46	South Lyon	2.9 pCi/L	150	0.7× under
47	Westwood	2.9 pCi/L	43	0.7× under
48	Durand	2.9 pCi/L	6	0.7× under
49	Vandercook Lake	2.9 pCi/L	16	0.7× under
50	Dimondale	2.8 pCi/L	12	0.7× under
51	Dundee	2.8 pCi/L	7	0.7× under
52	Brighton	2.8 pCi/L	141	0.7× under
53	Lake Orion	2.8 pCi/L	78	0.7× under
54	Stevensville	2.8 pCi/L	11	0.7× under
55	Cedar Springs	2.8 pCi/L	10	0.7× under
56	Corunna	2.7 pCi/L	8	0.7× under
57	Owosso	2.7 pCi/L	10	0.7× under
58	Hastings	2.7 pCi/L	8	0.7× under
59	Battle Creek	2.7 pCi/L	6	0.7× under
60	Flushing	2.7 pCi/L	17	0.7× under
61	Keego Harbor	2.6 pCi/L	19	0.7× under
62	Milford	2.6 pCi/L	78	0.7× under
63	Otsego	2.6 pCi/L	9	0.7× under
64	Detroit	2.6 pCi/L	110	0.7× under
65	Farmington Hills	2.6 pCi/L	69	0.6× under
66	Alpena	2.6 pCi/L	16	0.6× under
67	Howell	2.6 pCi/L	69	0.6× under
68	Swartz Creek	2.5 pCi/L	15	0.6× under
69	Almont	2.5 pCi/L	12	0.6× under
70	Ann Arbor	2.5 pCi/L	407	0.6× under
71	Milan	2.5 pCi/L	15	0.6× under
72	Bloomfield Hills	2.5 pCi/L	74	0.6× under
73	Whitmore Lake	2.5 pCi/L	46	0.6× under
74	Galesburg	2.5 pCi/L	6	0.6× under
75	Sparta	2.5 pCi/L	10	0.6× under
76	Traverse City	2.5 pCi/L	38	0.6× under
77	Waterford	2.5 pCi/L	87	0.6× under
78	Ypsilanti	2.5 pCi/L	122	0.6× under
79	Armada	2.5 pCi/L	6	0.6× under
80	Cadillac	2.5 pCi/L	27	0.6× under
81	Grosse Pointe Park	2.5 pCi/L	52	0.6× under
82	Kalamazoo	2.5 pCi/L	33	0.6× under
83	Belleville	2.4 pCi/L	29	0.6× under
84	Dexter	2.4 pCi/L	64	0.6× under
85	Grosse Pointe Farms	2.4 pCi/L	62	0.6× under
86	Michigan Center	2.4 pCi/L	6	0.6× under
87	Sault Ste. Marie	2.4 pCi/L	9	0.6× under
88	Eaton Rapids	2.4 pCi/L	8	0.6× under
89	Saline	2.3 pCi/L	85	0.6× under
90	Temperance	2.3 pCi/L	14	0.6× under
91	Auburn Hills	2.3 pCi/L	72	0.6× under
92	Charlotte	2.3 pCi/L	7	0.6× under
93	Grosse Pointe Shores	2.3 pCi/L	9	0.6× under
94	Farmington	2.3 pCi/L	64	0.6× under
95	West Bloomfield Township	2.3 pCi/L	72	0.6× under
96	Wyandotte	2.3 pCi/L	8	0.6× under
97	Bingham Farms	2.3 pCi/L	25	0.6× under
98	Clinton	2.3 pCi/L	62	0.6× under
99	Portage	2.3 pCi/L	42	0.6× under
100	Rochester	2.3 pCi/L	110	0.6× under
101	Southgate	2.3 pCi/L	9	0.6× under
102	Frankenmuth	2.3 pCi/L	26	0.6× under
103	Mason	2.3 pCi/L	19	0.6× under
104	Wolverine Lake	2.3 pCi/L	74	0.6× under
105	East Lansing	2.2 pCi/L	48	0.6× under
106	Lowell	2.2 pCi/L	23	0.6× under
107	Wixom	2.2 pCi/L	68	0.6× under
108	Northville	2.2 pCi/L	142	0.6× under
109	Shields	2.2 pCi/L	11	0.5× under
110	Comstock Park	2.2 pCi/L	20	0.5× under
111	Haslett	2.2 pCi/L	15	0.5× under
112	Plymouth	2.2 pCi/L	95	0.5× under
113	Wyoming	2.1 pCi/L	12	0.5× under
114	Caledonia	2.1 pCi/L	23	0.5× under
115	Grandville	2.1 pCi/L	16	0.5× under
116	Linden	2.1 pCi/L	25	0.5× under
117	Canton	2.1 pCi/L	158	0.5× under
118	Romulus	2.1 pCi/L	8	0.5× under
119	Berrien Springs	2.1 pCi/L	7	0.5× under
120	Hudsonville	2.1 pCi/L	25	0.5× under
121	Vicksburg	2.1 pCi/L	8	0.5× under
122	Allendale	2.0 pCi/L	13	0.5× under
123	Franklin	2.0 pCi/L	52	0.5× under
124	Albion	2.0 pCi/L	7	0.5× under
125	Petersburg	2.0 pCi/L	8	0.5× under
126	Troy	2.0 pCi/L	127	0.5× under
127	Tecumseh	2.0 pCi/L	14	0.5× under
128	Comstock Northwest	2.0 pCi/L	13	0.5× under
129	New Haven	1.9 pCi/L	15	0.5× under
130	Orchard Lake	1.9 pCi/L	25	0.5× under
131	Greilickville	1.9 pCi/L	29	0.5× under
132	Marysville	1.9 pCi/L	10	0.5× under
133	Novi	1.9 pCi/L	106	0.5× under
134	Shelby	1.9 pCi/L	126	0.5× under
135	Eastwood	1.9 pCi/L	6	0.5× under
136	Holt	1.9 pCi/L	33	0.5× under
137	Lambertville	1.9 pCi/L	8	0.5× under
138	Niles	1.9 pCi/L	10	0.5× under
139	Sylvan Lake	1.9 pCi/L	24	0.5× under
140	Greenville	1.9 pCi/L	21	0.5× under
141	Laingsburg	1.9 pCi/L	10	0.5× under
142	Monroe	1.9 pCi/L	12	0.5× under
143	Davison	1.9 pCi/L	14	0.5× under
144	Goodrich	1.9 pCi/L	12	0.5× under
145	Hubbard Lake	1.9 pCi/L	7	0.5× under
146	Pontiac	1.9 pCi/L	18	0.5× under
147	Brownlee Park	1.8 pCi/L	10	0.5× under
148	Grand Ledge	1.8 pCi/L	19	0.5× under
149	Rockford	1.8 pCi/L	36	0.4× under
150	Woodhaven	1.8 pCi/L	16	0.4× under
151	Ortonville	1.7 pCi/L	14	0.4× under
152	Beulah	1.7 pCi/L	6	0.4× under
153	Edgemont Park	1.7 pCi/L	18	0.4× under
154	Flint	1.7 pCi/L	9	0.4× under
155	Grand Rapids	1.7 pCi/L	72	0.4× under
156	Paw Paw	1.7 pCi/L	6	0.4× under
157	River Rouge	1.7 pCi/L	16	0.4× under
158	Petoskey	1.7 pCi/L	12	0.4× under
159	Byron Center	1.7 pCi/L	32	0.4× under
160	Utica	1.6 pCi/L	30	0.4× under
161	Flat Rock	1.6 pCi/L	12	0.4× under
162	Fraser	1.6 pCi/L	16	0.4× under
163	Kalkaska	1.6 pCi/L	9	0.4× under
164	Grand Haven	1.6 pCi/L	9	0.4× under
165	Mattawan	1.6 pCi/L	19	0.4× under
166	Northview	1.6 pCi/L	32	0.4× under
167	Taylor	1.6 pCi/L	17	0.4× under
168	Birmingham	1.6 pCi/L	71	0.4× under
169	East Jordan	1.6 pCi/L	6	0.4× under
170	Rockwood	1.6 pCi/L	11	0.4× under
171	Charlevoix	1.6 pCi/L	9	0.4× under
172	Forest Hills	1.6 pCi/L	69	0.4× under
173	Imlay City	1.6 pCi/L	8	0.4× under
174	Saginaw	1.6 pCi/L	9	0.4× under
175	Fair Plain	1.5 pCi/L	15	0.4× under
176	Lake Fenton	1.5 pCi/L	12	0.4× under
177	Clawson	1.5 pCi/L	47	0.4× under
178	Zeeland	1.5 pCi/L	15	0.4× under
179	Saint Clair Shores	1.5 pCi/L	26	0.4× under
180	Sterling Heights	1.5 pCi/L	56	0.4× under
181	Westland	1.5 pCi/L	11	0.4× under
182	Bay City	1.5 pCi/L	12	0.4× under
183	Okemos	1.5 pCi/L	42	0.4× under
184	Livonia	1.4 pCi/L	52	0.4× under
185	Berkley	1.4 pCi/L	43	0.4× under
186	Huntington Woods	1.4 pCi/L	21	0.4× under
187	Beverly Hills	1.4 pCi/L	30	0.4× under
188	Fowlerville	1.4 pCi/L	11	0.3× under
189	Marquette	1.4 pCi/L	9	0.3× under
190	Grosse Pointe Woods	1.4 pCi/L	7	0.3× under
191	Lakeview	1.4 pCi/L	10	0.3× under
192	Menominee	1.4 pCi/L	8	0.3× under
193	Oak Park	1.4 pCi/L	9	0.3× under
194	Lansing	1.4 pCi/L	44	0.3× under
195	Grand Blanc	1.4 pCi/L	29	0.3× under
196	Kentwood	1.4 pCi/L	20	0.3× under
197	Schoolcraft	1.3 pCi/L	7	0.3× under
198	Harbor Springs	1.3 pCi/L	12	0.3× under
199	Midland	1.3 pCi/L	36	0.3× under
200	Port Huron	1.3 pCi/L	14	0.3× under
201	New Baltimore	1.3 pCi/L	8	0.3× under
202	Mount Clemens	1.3 pCi/L	46	0.3× under
203	South Gull Lake	1.3 pCi/L	7	0.3× under
204	East Grand Rapids	1.3 pCi/L	60	0.3× under
205	Hancock	1.2 pCi/L	9	0.3× under
206	Walker	1.2 pCi/L	20	0.3× under
207	Trenton	1.2 pCi/L	8	0.3× under
208	Pleasant Ridge	1.2 pCi/L	8	0.3× under
209	Big Rapids	1.1 pCi/L	13	0.3× under
210	Redford	1.1 pCi/L	12	0.3× under
211	Elk Rapids	1.1 pCi/L	9	0.3× under
212	Burton	1.1 pCi/L	14	0.3× under
213	Kingsley	1.1 pCi/L	9	0.3× under
214	Marine City	1.1 pCi/L	8	0.3× under
215	Beechwood	1.0 pCi/L	23	0.3× under
216	Saint Joseph	1.0 pCi/L	7	0.3× under
217	Dearborn Heights	1.0 pCi/L	22	0.3× under
218	Royal Oak	1.0 pCi/L	33	0.3× under
219	Cheboygan	1.0 pCi/L	6	0.2× under
220	Madison Heights	1.0 pCi/L	10	0.2× under
221	Saint Clair	1.0 pCi/L	7	0.2× under
222	Spring Lake	1.0 pCi/L	12	0.2× under
223	Garden City	0.9 pCi/L	10	0.2× under
224	Belding	0.9 pCi/L	7	0.2× under
225	Holland	0.9 pCi/L	26	0.2× under
226	Ferndale	0.9 pCi/L	24	0.2× under
227	Hazel Park	0.8 pCi/L	7	0.2× under
228	Leland	0.8 pCi/L	13	0.2× under
229	Waverly	0.7 pCi/L	17	0.2× under
230	Highland Park	0.6 pCi/L	8	0.2× under
231	Hamtramck	0.5 pCi/L	7	0.1× under

See USA cities ranked by radon level See all States ranked by radon level