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 9.0 pCi/L, based on Airthings measurements across 253 cities.

Updated September 28, 2026

Highest city

9.0pCi/L

Hillsdale

Michigan city average

2.3pCi/L

across 253 cities

Above action level

18/ 253

cities

Michigan Cities Ranked by Indoor Radon Levels
#	Location	Avg level	vs action level
1	Hillsdale	9.0 pCi/L	2.2× over
2	Gwinn	8.0 pCi/L	2.0× over
3	Gladstone	7.8 pCi/L	2.0× over
4	Coldwater	7.2 pCi/L	1.8× over
5	Escanaba	6.9 pCi/L	1.7× over
6	West Monroe	6.9 pCi/L	1.7× over
7	Manitou Beach-Devils Lake	6.5 pCi/L	1.6× over
8	Napoleon	6.5 pCi/L	1.6× over
9	Brooklyn	5.8 pCi/L	1.5× over
10	Carleton	5.8 pCi/L	1.4× over
11	Grass Lake	5.0 pCi/L	1.2× over
12	Bath	4.5 pCi/L	1.1× over
13	Allegan	4.4 pCi/L	1.1× over
14	Lapeer	4.4 pCi/L	1.1× over
15	Leslie	4.2 pCi/L	1.1× over
16	Chelsea	4.1 pCi/L	1.0× over
17	Parchment	4.0 pCi/L	1.0× over
18	Stockbridge	4.0 pCi/L	1.0× over
✓ Below EPA action level (4 pCi/L)
19	DeWitt	3.9 pCi/L	1.0× under
20	Stony Point	3.8 pCi/L	1.0× under
21	Gaylord	3.8 pCi/L	0.9× under
22	Portland	3.7 pCi/L	0.9× under
23	Saint Johns	3.7 pCi/L	0.9× under
24	Pinckney	3.6 pCi/L	0.9× under
25	Jenison	3.6 pCi/L	0.9× under
26	Middleville	3.6 pCi/L	0.9× under
27	Montrose	3.4 pCi/L	0.8× under
28	Jackson	3.3 pCi/L	0.8× under
29	Allen Park	3.3 pCi/L	0.8× under
30	Grosse Ile	3.2 pCi/L	0.8× under
31	Adrian	3.2 pCi/L	0.8× under
32	Holly	3.2 pCi/L	0.8× under
33	Walled Lake	3.2 pCi/L	0.8× under
34	Williamston	3.2 pCi/L	0.8× under
35	Buchanan	3.1 pCi/L	0.8× under
36	Fenton	3.1 pCi/L	0.8× under
37	Oxford	3.1 pCi/L	0.8× under
38	Ecorse	3.1 pCi/L	0.8× under
39	Grosse Pointe	3.0 pCi/L	0.8× under
40	Rochester Hills	3.0 pCi/L	0.8× under
41	Romeo	3.0 pCi/L	0.7× under
42	Clarkston	3.0 pCi/L	0.7× under
43	Marshall	3.0 pCi/L	0.7× under
44	Argentine	3.0 pCi/L	0.7× under
45	Manchester	3.0 pCi/L	0.7× under
46	Ionia	2.9 pCi/L	0.7× under
47	Iron Mountain	2.9 pCi/L	0.7× under
48	Plainwell	2.9 pCi/L	0.7× under
49	South Lyon	2.9 pCi/L	0.7× under
50	Durand	2.9 pCi/L	0.7× under
51	Lake Orion	2.9 pCi/L	0.7× under
52	Westwood	2.9 pCi/L	0.7× under
53	Vandercook Lake	2.9 pCi/L	0.7× under
54	Brighton	2.8 pCi/L	0.7× under
55	Dimondale	2.8 pCi/L	0.7× under
56	Dundee	2.8 pCi/L	0.7× under
57	Hastings	2.8 pCi/L	0.7× under
58	Cedar Springs	2.7 pCi/L	0.7× under
59	Corunna	2.7 pCi/L	0.7× under
60	Owosso	2.7 pCi/L	0.7× under
61	Stevensville	2.7 pCi/L	0.7× under
62	Spring Arbor	2.7 pCi/L	0.7× under
63	Battle Creek	2.7 pCi/L	0.7× under
64	Keego Harbor	2.7 pCi/L	0.7× under
65	Otsego	2.6 pCi/L	0.7× under
66	Flushing	2.6 pCi/L	0.7× under
67	Milford	2.6 pCi/L	0.7× under
68	Detroit	2.6 pCi/L	0.6× under
69	Farmington Hills	2.6 pCi/L	0.6× under
70	Howell	2.6 pCi/L	0.6× under
71	Norway	2.5 pCi/L	0.6× under
72	Swartz Creek	2.5 pCi/L	0.6× under
73	Alpena	2.5 pCi/L	0.6× under
74	Milan	2.5 pCi/L	0.6× under
75	Ann Arbor	2.5 pCi/L	0.6× under
76	Galesburg	2.5 pCi/L	0.6× under
77	Sparta	2.5 pCi/L	0.6× under
78	Almont	2.5 pCi/L	0.6× under
79	Waterford	2.5 pCi/L	0.6× under
80	Cadillac	2.5 pCi/L	0.6× under
81	Armada	2.5 pCi/L	0.6× under
82	Belleville	2.5 pCi/L	0.6× under
83	Bloomfield Hills	2.4 pCi/L	0.6× under
84	Clinton	2.4 pCi/L	0.6× under
85	Traverse City	2.4 pCi/L	0.6× under
86	Auburn Hills	2.4 pCi/L	0.6× under
87	Grosse Pointe Park	2.4 pCi/L	0.6× under
88	Temperance	2.4 pCi/L	0.6× under
89	Whitmore Lake	2.4 pCi/L	0.6× under
90	West Bloomfield Township	2.4 pCi/L	0.6× under
91	Grosse Pointe Farms	2.4 pCi/L	0.6× under
92	Wyandotte	2.4 pCi/L	0.6× under
93	Ypsilanti	2.4 pCi/L	0.6× under
94	Lathrup Village	2.4 pCi/L	0.6× under
95	Dexter	2.4 pCi/L	0.6× under
96	Michigan Center	2.4 pCi/L	0.6× under
97	Sault Ste. Marie	2.4 pCi/L	0.6× under
98	Eaton Rapids	2.4 pCi/L	0.6× under
99	Rochester	2.3 pCi/L	0.6× under
100	Perry	2.3 pCi/L	0.6× under
101	Rogers City	2.3 pCi/L	0.6× under
102	Charlotte	2.3 pCi/L	0.6× under
103	Grosse Pointe Shores	2.3 pCi/L	0.6× under
104	Kalamazoo	2.3 pCi/L	0.6× under
105	Farmington	2.3 pCi/L	0.6× under
106	Saline	2.3 pCi/L	0.6× under
107	Bingham Farms	2.3 pCi/L	0.6× under
108	Portage	2.3 pCi/L	0.6× under
109	Three Rivers	2.3 pCi/L	0.6× under
110	Mason	2.3 pCi/L	0.6× under
111	Southgate	2.3 pCi/L	0.6× under
112	Haslett	2.2 pCi/L	0.6× under
113	Lowell	2.2 pCi/L	0.6× under
114	Wolverine Lake	2.2 pCi/L	0.6× under
115	East Lansing	2.2 pCi/L	0.6× under
116	Potterville	2.2 pCi/L	0.6× under
117	Wixom	2.2 pCi/L	0.6× under
118	Northville	2.2 pCi/L	0.6× under
119	Sturgis	2.2 pCi/L	0.6× under
120	Shields	2.2 pCi/L	0.5× under
121	Frankenmuth	2.2 pCi/L	0.5× under
122	Plymouth	2.2 pCi/L	0.5× under
123	Comstock Park	2.1 pCi/L	0.5× under
124	Wyoming	2.1 pCi/L	0.5× under
125	Caledonia	2.1 pCi/L	0.5× under
126	Grandville	2.1 pCi/L	0.5× under
127	Linden	2.1 pCi/L	0.5× under
128	Franklin	2.1 pCi/L	0.5× under
129	Canton	2.1 pCi/L	0.5× under
130	Berrien Springs	2.1 pCi/L	0.5× under
131	Vicksburg	2.1 pCi/L	0.5× under
132	Allendale	2.0 pCi/L	0.5× under
133	Hudsonville	2.0 pCi/L	0.5× under
134	Greilickville	2.0 pCi/L	0.5× under
135	Tecumseh	2.0 pCi/L	0.5× under
136	Albion	2.0 pCi/L	0.5× under
137	Orchard Lake	2.0 pCi/L	0.5× under
138	Petersburg	2.0 pCi/L	0.5× under
139	Troy	2.0 pCi/L	0.5× under
140	Romulus	2.0 pCi/L	0.5× under
141	Niles	1.9 pCi/L	0.5× under
142	Marysville	1.9 pCi/L	0.5× under
143	Novi	1.9 pCi/L	0.5× under
144	Eastwood	1.9 pCi/L	0.5× under
145	Greenville	1.9 pCi/L	0.5× under
146	Shelby	1.9 pCi/L	0.5× under
147	Monroe	1.9 pCi/L	0.5× under
148	Sylvan Lake	1.9 pCi/L	0.5× under
149	Lambertville	1.9 pCi/L	0.5× under
150	New Haven	1.9 pCi/L	0.5× under
151	Laingsburg	1.9 pCi/L	0.5× under
152	Holt	1.9 pCi/L	0.5× under
153	Hubbard Lake	1.9 pCi/L	0.5× under
154	Bellevue	1.8 pCi/L	0.5× under
155	Brownlee Park	1.8 pCi/L	0.5× under
156	Comstock Northwest	1.8 pCi/L	0.5× under
157	Goodrich	1.8 pCi/L	0.5× under
158	Davison	1.8 pCi/L	0.5× under
159	Lincoln Park	1.8 pCi/L	0.4× under
160	Rockford	1.8 pCi/L	0.4× under
161	Grand Ledge	1.8 pCi/L	0.4× under
162	Edgemont Park	1.8 pCi/L	0.4× under
163	Woodhaven	1.8 pCi/L	0.4× under
164	Mattawan	1.7 pCi/L	0.4× under
165	Beulah	1.7 pCi/L	0.4× under
166	Taylor	1.7 pCi/L	0.4× under
167	Flint	1.7 pCi/L	0.4× under
168	Paw Paw	1.7 pCi/L	0.4× under
169	Grand Rapids	1.7 pCi/L	0.4× under
170	Ortonville	1.7 pCi/L	0.4× under
171	Petoskey	1.7 pCi/L	0.4× under
172	Byron Center	1.6 pCi/L	0.4× under
173	River Rouge	1.6 pCi/L	0.4× under
174	Utica	1.6 pCi/L	0.4× under
175	Pontiac	1.6 pCi/L	0.4× under
176	Flat Rock	1.6 pCi/L	0.4× under
177	Fraser	1.6 pCi/L	0.4× under
178	Northview	1.6 pCi/L	0.4× under
179	Birmingham	1.6 pCi/L	0.4× under
180	East Jordan	1.6 pCi/L	0.4× under
181	Rockwood	1.6 pCi/L	0.4× under
182	South Gull Lake	1.6 pCi/L	0.4× under
183	Charlevoix	1.6 pCi/L	0.4× under
184	Kalkaska	1.6 pCi/L	0.4× under
185	Saginaw	1.6 pCi/L	0.4× under
186	Forest Hills	1.5 pCi/L	0.4× under
187	Grand Haven	1.5 pCi/L	0.4× under
188	Fair Plain	1.5 pCi/L	0.4× under
189	Imlay City	1.5 pCi/L	0.4× under
190	Zeeland	1.5 pCi/L	0.4× under
191	Saint Clair Shores	1.5 pCi/L	0.4× under
192	Sterling Heights	1.5 pCi/L	0.4× under
193	Westland	1.5 pCi/L	0.4× under
194	Bay City	1.5 pCi/L	0.4× under
195	Clawson	1.5 pCi/L	0.4× under
196	Lake Fenton	1.5 pCi/L	0.4× under
197	Okemos	1.5 pCi/L	0.4× under
198	Livonia	1.5 pCi/L	0.4× under
199	Berkley	1.4 pCi/L	0.4× under
200	Huntington Woods	1.4 pCi/L	0.4× under
201	Beverly Hills	1.4 pCi/L	0.4× under
202	Fowlerville	1.4 pCi/L	0.3× under
203	Lansing	1.4 pCi/L	0.3× under
204	Lakeview	1.4 pCi/L	0.3× under
205	Menominee	1.4 pCi/L	0.3× under
206	Oak Park	1.4 pCi/L	0.3× under
207	Grosse Pointe Woods	1.4 pCi/L	0.3× under
208	Grand Blanc	1.4 pCi/L	0.3× under
209	Kentwood	1.4 pCi/L	0.3× under
210	Marquette	1.3 pCi/L	0.3× under
211	Schoolcraft	1.3 pCi/L	0.3× under
212	Midland	1.3 pCi/L	0.3× under
213	Harbor Springs	1.3 pCi/L	0.3× under
214	Port Huron	1.3 pCi/L	0.3× under
215	New Baltimore	1.3 pCi/L	0.3× under
216	Mount Clemens	1.3 pCi/L	0.3× under
217	East Grand Rapids	1.3 pCi/L	0.3× under
218	Walker	1.2 pCi/L	0.3× under
219	Hancock	1.2 pCi/L	0.3× under
220	Trenton	1.2 pCi/L	0.3× under
221	Pleasant Ridge	1.2 pCi/L	0.3× under
222	Redford	1.2 pCi/L	0.3× under
223	Big Rapids	1.1 pCi/L	0.3× under
224	Elk Rapids	1.1 pCi/L	0.3× under
225	Lexington	1.1 pCi/L	0.3× under
226	Burton	1.1 pCi/L	0.3× under
227	Inkster	1.1 pCi/L	0.3× under
228	Marine City	1.1 pCi/L	0.3× under
229	Beechwood	1.0 pCi/L	0.3× under
230	Dearborn	1.0 pCi/L	0.3× under
231	Saint Joseph	1.0 pCi/L	0.3× under
232	Dearborn Heights	1.0 pCi/L	0.3× under
233	Kingsley	1.0 pCi/L	0.3× under
234	Royal Oak	1.0 pCi/L	0.3× under
235	Cheboygan	1.0 pCi/L	0.2× under
236	Saint Clair	1.0 pCi/L	0.2× under
237	Spring Lake	1.0 pCi/L	0.2× under
238	Garden City	0.9 pCi/L	0.2× under
239	Belding	0.9 pCi/L	0.2× under
240	Madison Heights	0.9 pCi/L	0.2× under
241	Holland	0.9 pCi/L	0.2× under
242	Ferndale	0.8 pCi/L	0.2× under
243	Bellaire	0.8 pCi/L	0.2× under
244	Roseville	0.8 pCi/L	0.2× under
245	Hazel Park	0.8 pCi/L	0.2× under
246	Leland	0.8 pCi/L	0.2× under
247	Norton Shores	0.8 pCi/L	0.2× under
248	Waverly	0.8 pCi/L	0.2× under
249	Manistee	0.7 pCi/L	0.2× under
250	Highland Park	0.6 pCi/L	0.2× under
251	Wayne	0.6 pCi/L	0.2× under
252	Pearl Beach	0.6 pCi/L	0.1× under
253	Hamtramck	0.5 pCi/L	0.1× under

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