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 198 cities.

Updated September 28, 2026

Highest city

10.0pCi/L

Harmony

Minnesota city average

3.0pCi/L

across 198 cities

Above action level

30/ 198

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	Belle Plaine	8.0 pCi/L	2.0× over
4	Pelican Rapids	7.1 pCi/L	1.8× over
5	North Mankato	7.0 pCi/L	1.7× over
6	Albert Lea	6.6 pCi/L	1.7× over
7	Lakeland	6.2 pCi/L	1.5× over
8	New Ulm	6.1 pCi/L	1.5× over
9	Stewartville	6.1 pCi/L	1.5× over
10	Saint Peter	6.0 pCi/L	1.5× over
11	Moorhead	5.6 pCi/L	1.4× over
12	Saint Paul Park	5.4 pCi/L	1.4× over
13	Maple Lake	5.3 pCi/L	1.3× over
14	Glencoe	5.3 pCi/L	1.3× over
15	East Grand Forks	5.1 pCi/L	1.3× over
16	Sauk Rapids	5.1 pCi/L	1.3× over
17	Cold Spring	5.1 pCi/L	1.3× over
18	Monticello	5.0 pCi/L	1.3× over
19	Oakport	5.0 pCi/L	1.2× over
20	Owatonna	4.7 pCi/L	1.2× over
21	Mankato	4.6 pCi/L	1.2× over
22	Mora	4.4 pCi/L	1.1× over
23	Newport	4.4 pCi/L	1.1× over
24	Red Lake Falls	4.3 pCi/L	1.1× over
25	Baxter	4.3 pCi/L	1.1× over
26	New Prague	4.2 pCi/L	1.1× over
27	Fairmont	4.1 pCi/L	1.0× over
28	Little Falls	4.1 pCi/L	1.0× over
29	Tonka Bay	4.1 pCi/L	1.0× over
30	New Richland	4.0 pCi/L	1.0× over
✓ Below EPA action level (4 pCi/L)
31	Hutchinson	4.0 pCi/L	1.0× under
32	Faribault	4.0 pCi/L	1.0× under
33	Grand Rapids	3.9 pCi/L	1.0× under
34	Bagley	3.9 pCi/L	1.0× under
35	Long Lake	3.8 pCi/L	1.0× under
36	Alexandria	3.8 pCi/L	0.9× under
37	Dayton	3.8 pCi/L	0.9× under
38	Hastings	3.8 pCi/L	0.9× under
39	Brooklyn Center	3.8 pCi/L	0.9× under
40	Clearwater	3.7 pCi/L	0.9× under
41	Chaska	3.7 pCi/L	0.9× under
42	Perham	3.7 pCi/L	0.9× under
43	La Crescent	3.7 pCi/L	0.9× under
44	Oronoco	3.6 pCi/L	0.9× under
45	Red Wing	3.6 pCi/L	0.9× under
46	Willmar	3.6 pCi/L	0.9× under
47	Melrose	3.6 pCi/L	0.9× under
48	Farmington	3.6 pCi/L	0.9× under
49	Thief River Falls	3.5 pCi/L	0.9× under
50	Rochester	3.5 pCi/L	0.9× under
51	Afton	3.5 pCi/L	0.9× under
52	Grand Marais	3.5 pCi/L	0.9× under
53	Fergus Falls	3.4 pCi/L	0.9× under
54	Annandale	3.4 pCi/L	0.9× under
55	Burnsville	3.4 pCi/L	0.8× under
56	Buffalo	3.4 pCi/L	0.8× under
57	Northfield	3.4 pCi/L	0.8× under
58	Fridley	3.3 pCi/L	0.8× under
59	Maplewood	3.3 pCi/L	0.8× under
60	Springfield	3.3 pCi/L	0.8× under
61	Shakopee	3.3 pCi/L	0.8× under
62	Elko New Market	3.3 pCi/L	0.8× under
63	Walker	3.2 pCi/L	0.8× under
64	Detroit Lakes	3.1 pCi/L	0.8× under
65	Rockford	3.1 pCi/L	0.8× under
66	Dellwood	3.1 pCi/L	0.8× under
67	Wayzata	3.1 pCi/L	0.8× under
68	Waconia	3.1 pCi/L	0.8× under
69	Arden Hills	3.1 pCi/L	0.8× under
70	Savage	3.0 pCi/L	0.8× under
71	Oak Park Heights	3.0 pCi/L	0.8× under
72	Victoria	3.0 pCi/L	0.8× under
73	West Coon Rapids	3.0 pCi/L	0.8× under
74	Golden Valley	3.0 pCi/L	0.8× under
75	North Saint Paul	3.0 pCi/L	0.8× under
76	Orono	3.0 pCi/L	0.8× under
77	Austin	3.0 pCi/L	0.7× under
78	Bemidji	3.0 pCi/L	0.7× under
79	Dundas	2.9 pCi/L	0.7× under
80	Cross Lake	2.9 pCi/L	0.7× under
81	Apple Valley	2.9 pCi/L	0.7× under
82	East Gull Lake	2.8 pCi/L	0.7× under
83	Cologne	2.8 pCi/L	0.7× under
84	North Oaks	2.8 pCi/L	0.7× under
85	Anoka	2.8 pCi/L	0.7× under
86	Bloomington	2.8 pCi/L	0.7× under
87	Minnetonka	2.8 pCi/L	0.7× under
88	Roseville	2.8 pCi/L	0.7× under
89	Saint Bonifacius	2.8 pCi/L	0.7× under
90	Cloquet	2.7 pCi/L	0.7× under
91	Dilworth	2.7 pCi/L	0.7× under
92	Hermantown	2.7 pCi/L	0.7× under
93	Saint Cloud	2.7 pCi/L	0.7× under
94	Winona	2.7 pCi/L	0.7× under
95	Hanover	2.7 pCi/L	0.7× under
96	Saint Augusta	2.7 pCi/L	0.7× under
97	Lake Saint Croix Beach	2.7 pCi/L	0.7× under
98	Mound	2.7 pCi/L	0.7× under
99	Morris	2.7 pCi/L	0.7× under
100	Independence	2.7 pCi/L	0.7× under
101	Richfield	2.7 pCi/L	0.7× under
102	Chanhassen	2.6 pCi/L	0.7× under
103	Hopkins	2.6 pCi/L	0.7× under
104	Elk River	2.6 pCi/L	0.6× under
105	Robbinsdale	2.6 pCi/L	0.6× under
106	Scandia	2.6 pCi/L	0.6× under
107	Big Lake	2.6 pCi/L	0.6× under
108	Maple Grove	2.6 pCi/L	0.6× under
109	Otsego	2.6 pCi/L	0.6× under
110	Plymouth	2.6 pCi/L	0.6× under
111	Albertville	2.5 pCi/L	0.6× under
112	Aitkin	2.5 pCi/L	0.6× under
113	Eden Prairie	2.5 pCi/L	0.6× under
114	Lauderdale	2.5 pCi/L	0.6× under
115	Edina	2.4 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	Osseo	2.4 pCi/L	0.6× under
119	Waite Park	2.4 pCi/L	0.6× under
120	Mendota Heights	2.4 pCi/L	0.6× under
121	Sartell	2.4 pCi/L	0.6× under
122	Woodbury	2.4 pCi/L	0.6× under
123	Cottage Grove	2.4 pCi/L	0.6× under
124	Falcon Heights	2.4 pCi/L	0.6× under
125	Minnetonka Mills	2.4 pCi/L	0.6× under
126	Columbia Heights	2.3 pCi/L	0.6× under
127	New Brighton	2.3 pCi/L	0.6× under
128	Chisago City	2.3 pCi/L	0.6× under
129	Rosemount	2.3 pCi/L	0.6× under
130	Saint Louis Park	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	Carver	2.3 pCi/L	0.6× under
135	Brooklyn Park	2.2 pCi/L	0.6× under
136	Arnold	2.2 pCi/L	0.6× under
137	Duluth	2.2 pCi/L	0.6× under
138	Lakeville	2.2 pCi/L	0.6× under
139	New Hope	2.2 pCi/L	0.6× under
140	White Bear Lake	2.2 pCi/L	0.6× under
141	Excelsior	2.2 pCi/L	0.6× under
142	Jordan	2.2 pCi/L	0.6× under
143	Mahtomedi	2.2 pCi/L	0.6× under
144	Watertown	2.2 pCi/L	0.5× under
145	Crystal	2.2 pCi/L	0.5× under
146	Goodview	2.2 pCi/L	0.5× under
147	Prior Lake	2.2 pCi/L	0.5× under
148	Spring Park	2.1 pCi/L	0.5× under
149	Saint Michael	2.1 pCi/L	0.5× under
150	Saint Paul	2.1 pCi/L	0.5× under
151	Delano	2.1 pCi/L	0.5× under
152	Minnetrista	2.1 pCi/L	0.5× under
153	Rogers	2.1 pCi/L	0.5× under
154	Cambridge	2.1 pCi/L	0.5× under
155	Stillwater	2.1 pCi/L	0.5× under
156	Park Rapids	2.1 pCi/L	0.5× under
157	Minneapolis	2.0 pCi/L	0.5× under
158	Saint Anthony	2.0 pCi/L	0.5× under
159	Coon Rapids	2.0 pCi/L	0.5× under
160	North Branch	2.0 pCi/L	0.5× under
161	West Saint Paul	2.0 pCi/L	0.5× under
162	Vadnais Heights	2.0 pCi/L	0.5× under
163	Deephaven	2.0 pCi/L	0.5× under
164	Moose Lake	1.9 pCi/L	0.5× under
165	Stacy	1.9 pCi/L	0.5× under
166	Grant	1.9 pCi/L	0.5× under
167	Proctor	1.9 pCi/L	0.5× under
168	South Saint Paul	1.9 pCi/L	0.5× under
169	Oakdale	1.9 pCi/L	0.5× under
170	Forest Lake	1.9 pCi/L	0.5× under
171	Andover	1.8 pCi/L	0.5× under
172	Lonsdale	1.8 pCi/L	0.5× under
173	Oak Grove	1.8 pCi/L	0.5× under
174	Birchwood	1.8 pCi/L	0.5× under
175	Champlin	1.8 pCi/L	0.4× under
176	Shoreview	1.7 pCi/L	0.4× under
177	Becker	1.6 pCi/L	0.4× under
178	Warroad	1.6 pCi/L	0.4× under
179	Zimmerman	1.6 pCi/L	0.4× under
180	Lake Elmo	1.6 pCi/L	0.4× under
181	Wadena	1.6 pCi/L	0.4× under
182	Milaca	1.5 pCi/L	0.4× under
183	Mounds View	1.5 pCi/L	0.4× under
184	Crosby	1.5 pCi/L	0.4× under
185	Nowthen	1.5 pCi/L	0.4× under
186	Corcoran	1.4 pCi/L	0.4× under
187	Cohasset	1.4 pCi/L	0.4× under
188	Bayport	1.4 pCi/L	0.3× under
189	Lino Lakes	1.4 pCi/L	0.3× under
190	Hugo	1.3 pCi/L	0.3× under
191	Isanti	1.3 pCi/L	0.3× under
192	Medina	1.3 pCi/L	0.3× under
193	Ham Lake	1.2 pCi/L	0.3× under
194	Spring Lake Park	1.1 pCi/L	0.3× under
195	Circle Pines	1.1 pCi/L	0.3× under
196	Blaine	1.1 pCi/L	0.3× under
197	Lexington	0.9 pCi/L	0.2× under
198	Centerville	0.8 pCi/L	0.2× under

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