Massachusetts Cities Ranked by Indoor Radon Levels

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

East Douglas has the highest measured indoor radon in Massachusetts at 19.1 pCi/L, based on Airthings measurements across 268 cities.

Updated August 30, 2026

Highest city

19.1pCi/L

East Douglas

Massachusetts city average

2.4pCi/L

across 268 cities

Above action level

22/ 268

cities

Massachusetts Cities Ranked by Indoor Radon Levels
#	Location	Avg level	vs action level
1	East Douglas	19.1 pCi/L	4.8× over
2	Oxford	7.3 pCi/L	1.8× over
3	Leicester	6.3 pCi/L	1.6× over
4	Lanesborough	5.5 pCi/L	1.4× over
5	Ashburnham	5.4 pCi/L	1.4× over
6	Northbridge	5.3 pCi/L	1.3× over
7	Upton	5.3 pCi/L	1.3× over
8	Beverly Cove	5.1 pCi/L	1.3× over
9	Dudley	5.0 pCi/L	1.3× over
10	Fall River	4.6 pCi/L	1.2× over
11	Harwich Center	4.4 pCi/L	1.1× over
12	Assonet	4.2 pCi/L	1.1× over
13	Boylston	4.2 pCi/L	1.1× over
14	Auburn	4.2 pCi/L	1.1× over
15	North Westport	4.2 pCi/L	1.0× over
16	Beverly	4.1 pCi/L	1.0× over
17	Amesbury	4.1 pCi/L	1.0× over
18	Ipswich	4.1 pCi/L	1.0× over
19	Mansfield	4.1 pCi/L	1.0× over
20	Seekonk	4.0 pCi/L	1.0× over
21	Hamilton	4.0 pCi/L	1.0× over
22	Boxford	4.0 pCi/L	1.0× over
✓ Below EPA action level (4 pCi/L)
23	Chelmsford	4.0 pCi/L	1.0× under
24	Lunenburg	3.9 pCi/L	1.0× under
25	Head of Westport	3.9 pCi/L	1.0× under
26	Millville	3.9 pCi/L	1.0× under
27	Duxbury	3.8 pCi/L	1.0× under
28	Carver	3.8 pCi/L	0.9× under
29	Topsfield	3.7 pCi/L	0.9× under
30	Webster	3.7 pCi/L	0.9× under
31	Housatonic	3.7 pCi/L	0.9× under
32	West Boylston	3.7 pCi/L	0.9× under
33	Smith Mills	3.7 pCi/L	0.9× under
34	Wilbraham	3.6 pCi/L	0.9× under
35	Braintree	3.6 pCi/L	0.9× under
36	Falmouth	3.6 pCi/L	0.9× under
37	Harvard	3.6 pCi/L	0.9× under
38	Shrewsbury	3.5 pCi/L	0.9× under
39	Dunstable	3.4 pCi/L	0.9× under
40	West Newbury	3.4 pCi/L	0.9× under
41	South Peabody	3.4 pCi/L	0.9× under
42	Lynnfield	3.4 pCi/L	0.8× under
43	Freetown	3.4 pCi/L	0.8× under
44	Grafton	3.3 pCi/L	0.8× under
45	Gloucester	3.2 pCi/L	0.8× under
46	Bolton	3.2 pCi/L	0.8× under
47	Dighton	3.2 pCi/L	0.8× under
48	Billerica	3.2 pCi/L	0.8× under
49	Charlton	3.1 pCi/L	0.8× under
50	Acushnet Center	3.1 pCi/L	0.8× under
51	Ashfield	3.1 pCi/L	0.8× under
52	Westminster	3.1 pCi/L	0.8× under
53	Littleton Common	3.1 pCi/L	0.8× under
54	Whitinsville	3.1 pCi/L	0.8× under
55	Norwood	3.0 pCi/L	0.8× under
56	Newburyport	3.0 pCi/L	0.7× under
57	Leverett	3.0 pCi/L	0.7× under
58	Greenfield	3.0 pCi/L	0.7× under
59	Dracut	2.9 pCi/L	0.7× under
60	Andover	2.9 pCi/L	0.7× under
61	Westford	2.8 pCi/L	0.7× under
62	Fitchburg	2.8 pCi/L	0.7× under
63	West Concord	2.8 pCi/L	0.7× under
64	South Hadley	2.8 pCi/L	0.7× under
65	Millbury	2.8 pCi/L	0.7× under
66	Lawrence	2.8 pCi/L	0.7× under
67	Lincoln	2.8 pCi/L	0.7× under
68	Brockton	2.8 pCi/L	0.7× under
69	Sudbury	2.7 pCi/L	0.7× under
70	Westwood	2.7 pCi/L	0.7× under
71	Easton	2.7 pCi/L	0.7× under
72	Groveland	2.7 pCi/L	0.7× under
73	Berkley	2.7 pCi/L	0.7× under
74	Saugus	2.7 pCi/L	0.7× under
75	Pepperell	2.7 pCi/L	0.7× under
76	Framingham	2.7 pCi/L	0.7× under
77	Hubbardston	2.7 pCi/L	0.7× under
78	Stoneham	2.6 pCi/L	0.7× under
79	North Reading	2.6 pCi/L	0.7× under
80	Attleboro	2.6 pCi/L	0.7× under
81	Milton	2.6 pCi/L	0.7× under
82	Sunderland	2.6 pCi/L	0.7× under
83	Leominster	2.6 pCi/L	0.6× under
84	Natick	2.6 pCi/L	0.6× under
85	Westborough	2.6 pCi/L	0.6× under
86	Richmond	2.5 pCi/L	0.6× under
87	Woburn	2.5 pCi/L	0.6× under
88	Wenham	2.5 pCi/L	0.6× under
89	Cochituate	2.5 pCi/L	0.6× under
90	Worcester	2.5 pCi/L	0.6× under
91	Mansfield Center	2.5 pCi/L	0.6× under
92	Southborough	2.5 pCi/L	0.6× under
93	Stow	2.5 pCi/L	0.6× under
94	Hampden	2.5 pCi/L	0.6× under
95	Holden	2.5 pCi/L	0.6× under
96	Marlborough	2.5 pCi/L	0.6× under
97	Reading	2.5 pCi/L	0.6× under
98	Williamsburg	2.5 pCi/L	0.6× under
99	Abington	2.4 pCi/L	0.6× under
100	Hingham	2.4 pCi/L	0.6× under
101	Holbrook	2.4 pCi/L	0.6× under
102	Southampton	2.4 pCi/L	0.6× under
103	Wakefield	2.4 pCi/L	0.6× under
104	Uxbridge	2.4 pCi/L	0.6× under
105	Ayer	2.4 pCi/L	0.6× under
106	White Island Shores	2.4 pCi/L	0.6× under
107	South Duxbury	2.4 pCi/L	0.6× under
108	Sterling	2.3 pCi/L	0.6× under
109	Norwell	2.3 pCi/L	0.6× under
110	Rowley	2.3 pCi/L	0.6× under
111	Rutland	2.3 pCi/L	0.6× under
112	Sturbridge	2.3 pCi/L	0.6× under
113	Winchendon	2.3 pCi/L	0.6× under
114	Melrose	2.3 pCi/L	0.6× under
115	Townsend	2.3 pCi/L	0.6× under
116	Great Barrington	2.3 pCi/L	0.6× under
117	Hudson	2.3 pCi/L	0.6× under
118	Plymouth	2.3 pCi/L	0.6× under
119	Dalton	2.3 pCi/L	0.6× under
120	Dedham	2.3 pCi/L	0.6× under
121	Stoughton	2.3 pCi/L	0.6× under
122	Wilmington	2.3 pCi/L	0.6× under
123	Haverhill	2.3 pCi/L	0.6× under
124	Medfield	2.3 pCi/L	0.6× under
125	Southwick	2.3 pCi/L	0.6× under
126	West Tisbury	2.3 pCi/L	0.6× under
127	Williamstown	2.3 pCi/L	0.6× under
128	Peabody	2.2 pCi/L	0.6× under
129	South Amherst	2.2 pCi/L	0.6× under
130	Cotuit	2.2 pCi/L	0.6× under
131	Tyngsboro	2.2 pCi/L	0.6× under
132	Wayland	2.2 pCi/L	0.6× under
133	Framingham Center	2.2 pCi/L	0.5× under
134	Westfield	2.2 pCi/L	0.5× under
135	Lexington	2.1 pCi/L	0.5× under
136	Salem	2.1 pCi/L	0.5× under
137	Maynard	2.1 pCi/L	0.5× under
138	Northborough	2.1 pCi/L	0.5× under
139	North Falmouth	2.1 pCi/L	0.5× under
140	Acton	2.1 pCi/L	0.5× under
141	Danvers	2.1 pCi/L	0.5× under
142	Carlisle	2.1 pCi/L	0.5× under
143	Rockland	2.1 pCi/L	0.5× under
144	Bellingham	2.0 pCi/L	0.5× under
145	Granville	2.0 pCi/L	0.5× under
146	Methuen	2.0 pCi/L	0.5× under
147	Winchester	2.0 pCi/L	0.5× under
148	Franklin	2.0 pCi/L	0.5× under
149	Hopkinton	2.0 pCi/L	0.5× under
150	Paxton	2.0 pCi/L	0.5× under
151	Lenox	2.0 pCi/L	0.5× under
152	Clinton	2.0 pCi/L	0.5× under
153	Ashland	2.0 pCi/L	0.5× under
154	Foxborough	2.0 pCi/L	0.5× under
155	Pinehurst	1.9 pCi/L	0.5× under
156	Tewksbury	1.9 pCi/L	0.5× under
157	Norton	1.9 pCi/L	0.5× under
158	Hanson	1.9 pCi/L	0.5× under
159	Holyoke	1.9 pCi/L	0.5× under
160	Sagamore	1.9 pCi/L	0.5× under
161	Kingston	1.9 pCi/L	0.5× under
162	Mashpee	1.9 pCi/L	0.5× under
163	Raynham	1.9 pCi/L	0.5× under
164	Sherborn	1.9 pCi/L	0.5× under
165	Medway	1.9 pCi/L	0.5× under
166	Needham	1.9 pCi/L	0.5× under
167	Rockport	1.9 pCi/L	0.5× under
168	Groton	1.9 pCi/L	0.5× under
169	Weston	1.9 pCi/L	0.5× under
170	Amherst Center	1.8 pCi/L	0.5× under
171	Brewster	1.8 pCi/L	0.5× under
172	Sharon	1.8 pCi/L	0.5× under
173	Belmont	1.8 pCi/L	0.5× under
174	Teaticket	1.8 pCi/L	0.5× under
175	Princeton	1.8 pCi/L	0.5× under
176	Centerville	1.8 pCi/L	0.5× under
177	North Andover	1.8 pCi/L	0.4× under
178	Weymouth	1.8 pCi/L	0.4× under
179	East Falmouth	1.8 pCi/L	0.4× under
180	Ludlow	1.8 pCi/L	0.4× under
181	Wellesley	1.8 pCi/L	0.4× under
182	Newton	1.8 pCi/L	0.4× under
183	Pittsfield	1.8 pCi/L	0.4× under
184	Chicopee	1.7 pCi/L	0.4× under
185	Concord	1.7 pCi/L	0.4× under
186	Norfolk	1.7 pCi/L	0.4× under
187	Millis-Clicquot	1.7 pCi/L	0.4× under
188	Granby	1.7 pCi/L	0.4× under
189	Middleton	1.7 pCi/L	0.4× under
190	Waltham	1.7 pCi/L	0.4× under
191	Jamaica Plain	1.7 pCi/L	0.4× under
192	Dover	1.7 pCi/L	0.4× under
193	Hanover	1.7 pCi/L	0.4× under
194	Plainville	1.7 pCi/L	0.4× under
195	Medford	1.6 pCi/L	0.4× under
196	Swampscott	1.6 pCi/L	0.4× under
197	Rehoboth	1.6 pCi/L	0.4× under
198	Lowell	1.6 pCi/L	0.4× under
199	West Barnstable	1.6 pCi/L	0.4× under
200	Wrentham	1.6 pCi/L	0.4× under
201	Burlington	1.6 pCi/L	0.4× under
202	North Amherst	1.6 pCi/L	0.4× under
203	Easthampton	1.6 pCi/L	0.4× under
204	Holliston	1.6 pCi/L	0.4× under
205	Scituate	1.6 pCi/L	0.4× under
206	Cordaville	1.6 pCi/L	0.4× under
207	Marstons Mills	1.6 pCi/L	0.4× under
208	North Adams	1.6 pCi/L	0.4× under
209	Millis	1.6 pCi/L	0.4× under
210	Sutton	1.5 pCi/L	0.4× under
211	North Lakeville	1.5 pCi/L	0.4× under
212	Northampton	1.5 pCi/L	0.4× under
213	Ocean Grove	1.5 pCi/L	0.4× under
214	South Boston	1.5 pCi/L	0.4× under
215	Canton	1.5 pCi/L	0.4× under
216	Chelsea	1.5 pCi/L	0.4× under
217	Marblehead	1.5 pCi/L	0.4× under
218	Bliss Corner	1.5 pCi/L	0.4× under
219	Brookline	1.5 pCi/L	0.4× under
220	Norton Center	1.5 pCi/L	0.4× under
221	Essex	1.5 pCi/L	0.4× under
222	Arlington	1.4 pCi/L	0.4× under
223	Marshfield Hills	1.4 pCi/L	0.4× under
224	Somerville	1.4 pCi/L	0.4× under
225	Cohasset	1.4 pCi/L	0.4× under
226	Malden	1.4 pCi/L	0.4× under
227	North Seekonk	1.4 pCi/L	0.3× under
228	Walpole	1.4 pCi/L	0.3× under
229	Hopedale	1.4 pCi/L	0.3× under
230	Pocasset	1.4 pCi/L	0.3× under
231	Marshfield	1.3 pCi/L	0.3× under
232	Watertown	1.3 pCi/L	0.3× under
233	East Longmeadow	1.3 pCi/L	0.3× under
234	Randolph	1.2 pCi/L	0.3× under
235	Swansea	1.2 pCi/L	0.3× under
236	North Scituate	1.2 pCi/L	0.3× under
237	Agawam	1.2 pCi/L	0.3× under
238	Belchertown	1.2 pCi/L	0.3× under
239	Yarmouth	1.2 pCi/L	0.3× under
240	Bedford	1.1 pCi/L	0.3× under
241	Cambridge	1.1 pCi/L	0.3× under
242	Edgartown	1.1 pCi/L	0.3× under
243	Marion	1.1 pCi/L	0.3× under
244	Shirley	1.1 pCi/L	0.3× under
245	North Pembroke	1.1 pCi/L	0.3× under
246	Middleborough Center	1.1 pCi/L	0.3× under
247	Milford	1.1 pCi/L	0.3× under
248	Revere	1.1 pCi/L	0.3× under
249	Southbridge	1.1 pCi/L	0.3× under
250	Fairhaven	1.1 pCi/L	0.3× under
251	Quincy	1.1 pCi/L	0.3× under
252	Winthrop	1.1 pCi/L	0.3× under
253	Longmeadow	1.1 pCi/L	0.3× under
254	Everett	1.0 pCi/L	0.3× under
255	Somerset	1.0 pCi/L	0.3× under
256	New Bedford	1.0 pCi/L	0.2× under
257	West Springfield	1.0 pCi/L	0.2× under
258	Mendon	0.9 pCi/L	0.2× under
259	Taunton	0.9 pCi/L	0.2× under
260	South Yarmouth	0.9 pCi/L	0.2× under
261	South Deerfield	0.8 pCi/L	0.2× under
262	Athol	0.8 pCi/L	0.2× under
263	Gardner	0.8 pCi/L	0.2× under
264	Whitman	0.8 pCi/L	0.2× under
265	Boston	0.7 pCi/L	0.2× under
266	Springfield	0.6 pCi/L	0.2× under
267	Becket	0.4 pCi/L	0.1× under
268	Wellfleet	0.3 pCi/L	0.1× under

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