Minnesota Cities Ranked by Indoor Radon Levels

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

Harmony has the highest measured indoor radon in Minnesota at 10.0 pCi/L, based on Airthings measurements across 195 cities.

Updated August 30, 2026

Highest city

10.0pCi/L

Harmony

Minnesota city average

3.0pCi/L

across 195 cities

Above action level

28/ 195

cities

Minnesota Cities Ranked by Indoor Radon Levels
#	Location	Avg level	vs action level
1	Harmony	10.0 pCi/L	2.5× over
2	Janesville	9.5 pCi/L	2.4× over
3	Pelican Rapids	7.1 pCi/L	1.8× over
4	North Mankato	7.0 pCi/L	1.7× over
5	Albert Lea	6.5 pCi/L	1.6× over
6	Lakeland	6.2 pCi/L	1.5× over
7	New Ulm	6.1 pCi/L	1.5× over
8	Stewartville	6.1 pCi/L	1.5× over
9	Saint Peter	6.0 pCi/L	1.5× over
10	Moorhead	5.6 pCi/L	1.4× over
11	Saint Paul Park	5.4 pCi/L	1.4× over
12	Maple Lake	5.3 pCi/L	1.3× over
13	Glencoe	5.3 pCi/L	1.3× over
14	East Grand Forks	5.1 pCi/L	1.3× over
15	Sauk Rapids	5.1 pCi/L	1.3× over
16	Cold Spring	5.1 pCi/L	1.3× over
17	Monticello	5.0 pCi/L	1.3× over
18	Oakport	5.0 pCi/L	1.2× over
19	Owatonna	4.7 pCi/L	1.2× over
20	Mankato	4.6 pCi/L	1.2× over
21	Red Lake Falls	4.5 pCi/L	1.1× over
22	Baxter	4.5 pCi/L	1.1× over
23	Mora	4.4 pCi/L	1.1× over
24	Newport	4.4 pCi/L	1.1× over
25	New Prague	4.2 pCi/L	1.1× over
26	Fairmont	4.1 pCi/L	1.0× over
27	Tonka Bay	4.1 pCi/L	1.0× over
28	New Richland	4.0 pCi/L	1.0× over
✓ Below EPA action level (4 pCi/L)
29	Hutchinson	4.0 pCi/L	1.0× under
30	Faribault	4.0 pCi/L	1.0× under
31	Little Falls	4.0 pCi/L	1.0× under
32	Grand Rapids	3.9 pCi/L	1.0× under
33	Bagley	3.9 pCi/L	1.0× under
34	Long Lake	3.9 pCi/L	1.0× under
35	Brooklyn Center	3.8 pCi/L	1.0× under
36	Alexandria	3.8 pCi/L	0.9× under
37	Hastings	3.8 pCi/L	0.9× under
38	Clearwater	3.7 pCi/L	0.9× under
39	Dayton	3.7 pCi/L	0.9× under
40	La Crescent	3.7 pCi/L	0.9× under
41	Willmar	3.7 pCi/L	0.9× under
42	Oronoco	3.6 pCi/L	0.9× under
43	Red Wing	3.6 pCi/L	0.9× under
44	Chaska	3.6 pCi/L	0.9× under
45	Farmington	3.6 pCi/L	0.9× under
46	Melrose	3.6 pCi/L	0.9× under
47	Rochester	3.6 pCi/L	0.9× under
48	Perham	3.5 pCi/L	0.9× under
49	Thief River Falls	3.5 pCi/L	0.9× under
50	Afton	3.5 pCi/L	0.9× under
51	Fergus Falls	3.4 pCi/L	0.9× under
52	Annandale	3.4 pCi/L	0.9× under
53	Burnsville	3.4 pCi/L	0.9× under
54	Grand Marais	3.4 pCi/L	0.8× under
55	Buffalo	3.4 pCi/L	0.8× under
56	Northfield	3.4 pCi/L	0.8× under
57	Fridley	3.3 pCi/L	0.8× under
58	Maplewood	3.3 pCi/L	0.8× under
59	Shakopee	3.3 pCi/L	0.8× under
60	Waconia	3.3 pCi/L	0.8× under
61	Springfield	3.3 pCi/L	0.8× under
62	Elko New Market	3.3 pCi/L	0.8× under
63	Detroit Lakes	3.2 pCi/L	0.8× under
64	Rockford	3.1 pCi/L	0.8× under
65	Wayzata	3.1 pCi/L	0.8× under
66	Victoria	3.1 pCi/L	0.8× under
67	Dellwood	3.1 pCi/L	0.8× under
68	Arden Hills	3.1 pCi/L	0.8× under
69	Savage	3.1 pCi/L	0.8× under
70	Oak Park Heights	3.0 pCi/L	0.8× under
71	West Coon Rapids	3.0 pCi/L	0.8× under
72	Golden Valley	3.0 pCi/L	0.8× under
73	North Saint Paul	3.0 pCi/L	0.8× under
74	Orono	3.0 pCi/L	0.8× under
75	Cross Lake	3.0 pCi/L	0.7× under
76	Austin	3.0 pCi/L	0.7× under
77	Walker	3.0 pCi/L	0.7× under
78	Apple Valley	2.9 pCi/L	0.7× under
79	Bemidji	2.9 pCi/L	0.7× under
80	Dundas	2.9 pCi/L	0.7× under
81	Roseville	2.8 pCi/L	0.7× under
82	East Gull Lake	2.8 pCi/L	0.7× under
83	Winona	2.8 pCi/L	0.7× under
84	Anoka	2.8 pCi/L	0.7× under
85	Cologne	2.8 pCi/L	0.7× under
86	Bloomington	2.8 pCi/L	0.7× under
87	Saint Bonifacius	2.8 pCi/L	0.7× under
88	Cloquet	2.7 pCi/L	0.7× under
89	Mound	2.7 pCi/L	0.7× under
90	Dilworth	2.7 pCi/L	0.7× under
91	Hermantown	2.7 pCi/L	0.7× under
92	Saint Cloud	2.7 pCi/L	0.7× under
93	Minnetonka	2.7 pCi/L	0.7× under
94	Saint Augusta	2.7 pCi/L	0.7× under
95	Lake Saint Croix Beach	2.7 pCi/L	0.7× under
96	Morris	2.7 pCi/L	0.7× under
97	Chanhassen	2.6 pCi/L	0.7× under
98	Richfield	2.6 pCi/L	0.7× under
99	Independence	2.6 pCi/L	0.7× under
100	Robbinsdale	2.6 pCi/L	0.7× under
101	Aitkin	2.6 pCi/L	0.7× under
102	Elk River	2.6 pCi/L	0.7× under
103	Hopkins	2.6 pCi/L	0.6× under
104	Scandia	2.6 pCi/L	0.6× under
105	Big Lake	2.6 pCi/L	0.6× under
106	Otsego	2.6 pCi/L	0.6× under
107	Plymouth	2.6 pCi/L	0.6× under
108	Albertville	2.5 pCi/L	0.6× under
109	Maple Grove	2.5 pCi/L	0.6× under
110	Eden Prairie	2.5 pCi/L	0.6× under
111	North Oaks	2.5 pCi/L	0.6× under
112	Lauderdale	2.5 pCi/L	0.6× under
113	Edina	2.5 pCi/L	0.6× under
114	Sartell	2.5 pCi/L	0.6× under
115	Osseo	2.5 pCi/L	0.6× under
116	Little Canada	2.4 pCi/L	0.6× under
117	Shorewood	2.4 pCi/L	0.6× under
118	Columbia Heights	2.4 pCi/L	0.6× under
119	Mendota Heights	2.4 pCi/L	0.6× under
120	Waite Park	2.4 pCi/L	0.6× under
121	Woodbury	2.4 pCi/L	0.6× under
122	Falcon Heights	2.4 pCi/L	0.6× under
123	Minnetonka Mills	2.4 pCi/L	0.6× under
124	Rosemount	2.4 pCi/L	0.6× under
125	Carver	2.4 pCi/L	0.6× under
126	New Brighton	2.3 pCi/L	0.6× under
127	Saint Louis Park	2.3 pCi/L	0.6× under
128	Chisago City	2.3 pCi/L	0.6× under
129	Watertown	2.3 pCi/L	0.6× under
130	Cottage Grove	2.3 pCi/L	0.6× under
131	Ramsey	2.3 pCi/L	0.6× under
132	Eagan	2.3 pCi/L	0.6× under
133	Inver Grove Heights	2.3 pCi/L	0.6× under
134	Brooklyn Park	2.2 pCi/L	0.6× under
135	Excelsior	2.2 pCi/L	0.6× under
136	Crystal	2.2 pCi/L	0.6× under
137	Duluth	2.2 pCi/L	0.6× under
138	Arnold	2.2 pCi/L	0.6× under
139	Lakeville	2.2 pCi/L	0.6× under
140	New Hope	2.2 pCi/L	0.6× under
141	White Bear Lake	2.2 pCi/L	0.6× under
142	Mahtomedi	2.2 pCi/L	0.6× under
143	Goodview	2.2 pCi/L	0.5× under
144	Prior Lake	2.2 pCi/L	0.5× under
145	Saint Paul	2.1 pCi/L	0.5× under
146	Spring Park	2.1 pCi/L	0.5× under
147	Delano	2.1 pCi/L	0.5× under
148	Minnetrista	2.1 pCi/L	0.5× under
149	Rogers	2.1 pCi/L	0.5× under
150	Cambridge	2.1 pCi/L	0.5× under
151	Jordan	2.1 pCi/L	0.5× under
152	Moose Lake	2.1 pCi/L	0.5× under
153	Park Rapids	2.1 pCi/L	0.5× under
154	Coon Rapids	2.1 pCi/L	0.5× under
155	Minneapolis	2.0 pCi/L	0.5× under
156	Saint Anthony	2.0 pCi/L	0.5× under
157	North Branch	2.0 pCi/L	0.5× under
158	Stillwater	2.0 pCi/L	0.5× under
159	West Saint Paul	2.0 pCi/L	0.5× under
160	Saint Michael	2.0 pCi/L	0.5× under
161	Vadnais Heights	2.0 pCi/L	0.5× under
162	Deephaven	2.0 pCi/L	0.5× under
163	Proctor	1.9 pCi/L	0.5× under
164	Stacy	1.9 pCi/L	0.5× under
165	South Saint Paul	1.9 pCi/L	0.5× under
166	Forest Lake	1.9 pCi/L	0.5× under
167	Oakdale	1.8 pCi/L	0.5× under
168	Andover	1.8 pCi/L	0.5× under
169	Lonsdale	1.8 pCi/L	0.5× under
170	Oak Grove	1.8 pCi/L	0.5× under
171	Birchwood	1.8 pCi/L	0.5× under
172	Champlin	1.8 pCi/L	0.4× under
173	Becker	1.7 pCi/L	0.4× under
174	Shoreview	1.7 pCi/L	0.4× under
175	Warroad	1.6 pCi/L	0.4× under
176	Zimmerman	1.6 pCi/L	0.4× under
177	Lake Elmo	1.6 pCi/L	0.4× under
178	Wadena	1.6 pCi/L	0.4× under
179	Milaca	1.5 pCi/L	0.4× under
180	Mounds View	1.5 pCi/L	0.4× under
181	Crosby	1.5 pCi/L	0.4× under
182	Nowthen	1.5 pCi/L	0.4× under
183	Corcoran	1.5 pCi/L	0.4× under
184	Cohasset	1.4 pCi/L	0.4× under
185	Bayport	1.4 pCi/L	0.3× under
186	Lino Lakes	1.4 pCi/L	0.3× under
187	Hugo	1.3 pCi/L	0.3× under
188	Isanti	1.3 pCi/L	0.3× under
189	Medina	1.3 pCi/L	0.3× under
190	Ham Lake	1.2 pCi/L	0.3× under
191	Spring Lake Park	1.1 pCi/L	0.3× under
192	Circle Pines	1.1 pCi/L	0.3× under
193	Blaine	1.1 pCi/L	0.3× under
194	Centerville	0.8 pCi/L	0.2× under
195	Lexington	0.8 pCi/L	0.2× under

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