Indiana Cities Ranked by Indoor Radon Levels

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

Angola has the highest measured indoor radon in Indiana at 13.1 pCi/L, based on Airthings measurements across 139 cities.

Updated October 19, 2026

Highest city

13.1pCi/L

Angola

Indiana city average

3.6pCi/L

across 139 cities

Above action level

41/ 139

cities

Indiana Cities Ranked by Indoor Radon Levels
#	Location	Avg level	vs action level
1	Angola	13.1 pCi/L	3.3× over
2	Peru	10.9 pCi/L	2.7× over
3	Rushville	10.9 pCi/L	2.7× over
4	Yorktown	9.3 pCi/L	2.3× over
5	Battle Ground	9.2 pCi/L	2.3× over
6	Boonville	8.9 pCi/L	2.2× over
7	LaPorte	7.9 pCi/L	2.0× over
8	Danville	7.3 pCi/L	1.8× over
9	Greenfield	7.3 pCi/L	1.8× over
10	Syracuse	6.9 pCi/L	1.7× over
11	North Webster	6.3 pCi/L	1.6× over
12	Dayton	6.2 pCi/L	1.5× over
13	Corydon	6.2 pCi/L	1.5× over
14	Oolitic	6.1 pCi/L	1.5× over
15	Charlestown	6.0 pCi/L	1.5× over
16	Seelyville	5.9 pCi/L	1.5× over
17	Fairfield Heights	5.7 pCi/L	1.4× over
18	Southport	5.7 pCi/L	1.4× over
19	Muncie	5.5 pCi/L	1.4× over
20	Middletown	5.1 pCi/L	1.3× over
21	Rome City	5.1 pCi/L	1.3× over
22	Centerville	4.7 pCi/L	1.2× over
23	Vincennes	4.7 pCi/L	1.2× over
24	Kouts	4.6 pCi/L	1.2× over
25	Wanatah	4.6 pCi/L	1.2× over
26	Wabash	4.6 pCi/L	1.1× over
27	Plainfield	4.5 pCi/L	1.1× over
28	Dunlap	4.5 pCi/L	1.1× over
29	Henryville	4.5 pCi/L	1.1× over
30	Lafayette	4.4 pCi/L	1.1× over
31	Shorewood Forest	4.4 pCi/L	1.1× over
32	Jasper	4.3 pCi/L	1.1× over
33	Crawfordsville	4.2 pCi/L	1.1× over
34	Pittsboro	4.2 pCi/L	1.1× over
35	Aberdeen	4.2 pCi/L	1.1× over
36	Warren Park	4.2 pCi/L	1.0× over
37	Churubusco	4.2 pCi/L	1.0× over
38	Whiteland	4.2 pCi/L	1.0× over
39	Ossian	4.1 pCi/L	1.0× over
40	Bargersville	4.1 pCi/L	1.0× over
41	Huntington	4.0 pCi/L	1.0× over
✓ Below EPA action level (4 pCi/L)
42	Terre Haute	4.0 pCi/L	1.0× under
43	Auburn	4.0 pCi/L	1.0× under
44	Marion	3.9 pCi/L	1.0× under
45	Pendleton	3.9 pCi/L	1.0× under
46	Greensburg	3.9 pCi/L	1.0× under
47	Roanoke	3.8 pCi/L	1.0× under
48	Waterloo	3.8 pCi/L	1.0× under
49	Warsaw	3.8 pCi/L	0.9× under
50	Indianapolis	3.8 pCi/L	0.9× under
51	Valparaiso	3.8 pCi/L	0.9× under
52	Noblesville	3.8 pCi/L	0.9× under
53	Goshen	3.7 pCi/L	0.9× under
54	Kokomo	3.7 pCi/L	0.9× under
55	Speedway	3.7 pCi/L	0.9× under
56	Frankfort	3.6 pCi/L	0.9× under
57	Decatur	3.6 pCi/L	0.9× under
58	Broad Ripple	3.5 pCi/L	0.9× under
59	Lebanon	3.5 pCi/L	0.9× under
60	Fort Wayne	3.4 pCi/L	0.9× under
61	North Liberty	3.4 pCi/L	0.9× under
62	Saint John	3.4 pCi/L	0.9× under
63	Anderson	3.4 pCi/L	0.8× under
64	Franklin	3.3 pCi/L	0.8× under
65	Cumberland	3.3 pCi/L	0.8× under
66	Bloomfield	3.2 pCi/L	0.8× under
67	Fishers	3.2 pCi/L	0.8× under
68	Bloomington	3.2 pCi/L	0.8× under
69	Fortville	3.2 pCi/L	0.8× under
70	Carmel	3.2 pCi/L	0.8× under
71	West Lafayette	3.2 pCi/L	0.8× under
72	Mooresville	3.1 pCi/L	0.8× under
73	Beech Grove	3.1 pCi/L	0.8× under
74	Indian Heights	3.1 pCi/L	0.8× under
75	Dyer	3.1 pCi/L	0.8× under
76	Evansville	3.1 pCi/L	0.8× under
77	New Haven	3.1 pCi/L	0.8× under
78	Leo-Cedarville	3.0 pCi/L	0.8× under
79	Columbus	3.0 pCi/L	0.7× under
80	Clarksville	3.0 pCi/L	0.7× under
81	Brazil	3.0 pCi/L	0.7× under
82	McCordsville	3.0 pCi/L	0.7× under
83	Meridian Hills	2.9 pCi/L	0.7× under
84	Lakes of the Four Seasons	2.9 pCi/L	0.7× under
85	Galena	2.8 pCi/L	0.7× under
86	Elkhart	2.8 pCi/L	0.7× under
87	Martinsville	2.8 pCi/L	0.7× under
88	Richmond	2.8 pCi/L	0.7× under
89	Winona Lake	2.8 pCi/L	0.7× under
90	Brownsburg	2.8 pCi/L	0.7× under
91	Greenwood	2.8 pCi/L	0.7× under
92	Gulivoire Park	2.7 pCi/L	0.7× under
93	Zionsville	2.7 pCi/L	0.7× under
94	Sellersburg	2.7 pCi/L	0.7× under
95	Lawrence	2.6 pCi/L	0.7× under
96	Newburgh	2.6 pCi/L	0.6× under
97	Winfield	2.6 pCi/L	0.6× under
98	Columbia City	2.5 pCi/L	0.6× under
99	Portage	2.5 pCi/L	0.6× under
100	Granger	2.5 pCi/L	0.6× under
101	Bluffton	2.5 pCi/L	0.6× under
102	New Palestine	2.5 pCi/L	0.6× under
103	Clermont	2.5 pCi/L	0.6× under
104	Westfield	2.4 pCi/L	0.6× under
105	Cedar Lake	2.4 pCi/L	0.6× under
106	Milford	2.4 pCi/L	0.6× under
107	Huntertown	2.3 pCi/L	0.6× under
108	Oak Park	2.3 pCi/L	0.6× under
109	Schererville	2.3 pCi/L	0.6× under
110	Whitestown	2.3 pCi/L	0.6× under
111	Ellettsville	2.3 pCi/L	0.6× under
112	Melody Hill	2.2 pCi/L	0.6× under
113	Avon	2.2 pCi/L	0.6× under
114	Jeffersonville	2.2 pCi/L	0.6× under
115	Chandler	2.2 pCi/L	0.6× under
116	Aurora	2.2 pCi/L	0.5× under
117	Crown Point	2.1 pCi/L	0.5× under
118	Georgetown	2.1 pCi/L	0.5× under
119	Greendale	2.1 pCi/L	0.5× under
120	Mishawaka	2.1 pCi/L	0.5× under
121	Osceola	2.0 pCi/L	0.5× under
122	Westville	2.0 pCi/L	0.5× under
123	Kendallville	2.0 pCi/L	0.5× under
124	Bright	2.0 pCi/L	0.5× under
125	Highland	1.9 pCi/L	0.5× under
126	Lowell	1.8 pCi/L	0.4× under
127	Cicero	1.7 pCi/L	0.4× under
128	Griffith	1.6 pCi/L	0.4× under
129	South Bend	1.6 pCi/L	0.4× under
130	New Albany	1.6 pCi/L	0.4× under
131	Munster	1.6 pCi/L	0.4× under
132	Bristol	1.4 pCi/L	0.4× under
133	Chesterton	1.4 pCi/L	0.3× under
134	South Haven	1.3 pCi/L	0.3× under
135	Greencastle	1.2 pCi/L	0.3× under
136	Batesville	1.2 pCi/L	0.3× under
137	Hammond	1.1 pCi/L	0.3× under
138	Roselawn	0.6 pCi/L	0.2× under
139	Michigan City	0.4 pCi/L	0.1× under

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