Highest indoor radon communities (2025, survey vintage carried)

Carried from Health Canada 2012–2013 CMA radon-thoron survey means (not an annual retest).

PublisherOpenStats

Rank	Place	Province	Score
1	Moose Jaw	Saskatchewan	301.7
2	Regina	Saskatchewan	301.7
3	Weyburn	Saskatchewan	301.7
4	Morden	Manitoba	256.7
5	Niverville	Manitoba	256.7
6	Portage la Prairie	Manitoba	256.7
7	Selkirk	Manitoba	256.7
8	Steinbach	Manitoba	256.7
9	Stonewall	Manitoba	256.7
10	Winkler	Manitoba	256.7
11	Winnipeg	Manitoba	256.7
12	Cowansville	Quebec	238.2
13	Granby	Quebec	238.2
14	Sherbrooke	Quebec	238.2
15	Bridgewater	Nova Scotia	194.7
16	Halifax	Nova Scotia	194.7
17	Kentville	Nova Scotia	194.7
18	Truro	Nova Scotia	194.7
19	Wolfville	Nova Scotia	194.7
20	Belleville	Ontario	161
21	Brockville	Ontario	161
22	Gananoque	Ontario	161
23	Greater Napanee	Ontario	161
24	Kingston	Ontario	161
25	Prince Edward County	Ontario	161
26	Thunder Bay	Ontario	159.1
27	Amherstburg	Ontario	156.4
28	Chatham-Kent	Ontario	156.4
29	Essex	Ontario	156.4
30	Kingsville	Ontario	156.4
31	Lakeshore	Ontario	156.4
32	LaSalle	Ontario	156.4
33	Sarnia	Ontario	156.4
34	Tecumseh	Ontario	156.4
35	Windsor	Ontario	156.4
36	Humboldt	Saskatchewan	151.7
37	Martensville	Saskatchewan	151.7
38	Saskatoon	Saskatchewan	151.7
39	Warman	Saskatchewan	151.7
40	Armstrong	British Columbia	135.3
41	Kamloops	British Columbia	135.3
42	Kelowna	British Columbia	135.3
43	Merritt	British Columbia	135.3
44	Oliver	British Columbia	135.3
45	Osoyoos	British Columbia	135.3
46	Penticton	British Columbia	135.3
47	Salmon Arm	British Columbia	135.3
48	Vernon	British Columbia	135.3
49	West Kelowna	British Columbia	135.3
50	Airdrie	Alberta	135.1
51	Banff	Alberta	135.1
52	Calgary	Alberta	135.1
53	Canmore	Alberta	135.1
54	Chestermere	Alberta	135.1
55	Cochrane	Alberta	135.1
56	Didsbury	Alberta	135.1
57	Drumheller	Alberta	135.1
58	High River	Alberta	135.1
59	Innisfail	Alberta	135.1
60	Okotoks	Alberta	135.1
61	Olds	Alberta	135.1
62	Strathmore	Alberta	135.1
63	Espanola	Ontario	131.2
64	Greater Sudbury	Ontario	131.2
65	North Bay	Ontario	131.2
66	Sudbury	Ontario	131.2
67	Caledon	Ontario	130.8
68	Centre Wellington	Ontario	130.8
69	Erin	Ontario	130.8
70	Guelph	Ontario	130.8
71	Halton Hills	Ontario	130.8
72	Orangeville	Ontario	130.8
73	Joliette	Quebec	126.1
74	Lachute	Quebec	126.1
75	Laval	Quebec	126.1
76	Longueuil	Quebec	126.1
77	Montreal	Quebec	126.1
78	Saint-Hyacinthe	Quebec	126.1
79	Sainte-Agathe-des-Monts	Quebec	126.1
80	Salaberry-de-Valleyfield	Quebec	126.1
81	Terrebonne	Quebec	126.1
82	Levis	Quebec	119.7
83	Quebec City	Quebec	119.7
84	Saint-Georges	Quebec	119.7
85	Sainte-Marie	Quebec	119.7
86	Thetford Mines	Quebec	119.7
87	Fredericton	New Brunswick	118.4
88	Oromocto	New Brunswick	118.4
89	Quispamsis	New Brunswick	118.4
90	Rothesay	New Brunswick	118.4
91	Saint John	New Brunswick	118.4
92	Beaumont	Alberta	114.1
93	Camrose	Alberta	114.1
94	Devon	Alberta	114.1
95	Drayton Valley	Alberta	114.1
96	Edmonton	Alberta	114.1
97	Fort Saskatchewan	Alberta	114.1
98	Leduc	Alberta	114.1
99	Morinville	Alberta	114.1
100	Ponoka	Alberta	114.1
101	Spruce Grove	Alberta	114.1
102	St. Albert	Alberta	114.1
103	Stony Plain	Alberta	114.1
104	Vegreville	Alberta	114.1
105	Wetaskiwin	Alberta	114.1
106	Arnprior	Ontario	111.7
107	Aylmer	Ontario	111.7
108	Carleton Place	Ontario	111.7
109	Clarence-Rockland	Ontario	111.7
110	Cornwall	Ontario	111.7
111	Hawkesbury	Ontario	111.7
112	Mississippi Mills	Ontario	111.7
113	Ottawa	Ontario	111.7
114	Pembroke	Ontario	111.7
115	Perth	Ontario	111.7
116	Renfrew	Ontario	111.7
117	Smiths Falls	Ontario	111.7
118	Gatineau	Quebec	111.7
119	Brant	Ontario	111.4
120	Brantford	Ontario	111.4
121	Norfolk	Ontario	111.4
122	Norfolk County	Ontario	111.4
123	Woodstock	Ontario	111.4
124	Belleville - Quinte West	Ontario	101.1
125	Cobourg	Ontario	101.1
126	Kawartha Lakes	Ontario	101.1
127	Peterborough	Ontario	101.1
128	Port Hope	Ontario	101.1
129	Quinte West	Ontario	101.1
130	Alma	Quebec	96.1
131	Dolbeau-Mistassini	Quebec	96.1
132	Saguenay	Quebec	96.1
133	Bay Roberts	Newfoundland and Labrador	94.5
134	Clarenville	Newfoundland and Labrador	94.5
135	Conception Bay South	Newfoundland and Labrador	94.5
136	Mount Pearl	Newfoundland and Labrador	94.5
137	Paradise	Newfoundland and Labrador	94.5
138	Portugal Cove-St. Philip's	Newfoundland and Labrador	94.5
139	St. John's	Newfoundland and Labrador	94.5
140	Torbay	Newfoundland and Labrador	94.5
141	Barrie	Ontario	87
142	Bracebridge	Ontario	87
143	Bradford West Gwillimbury	Ontario	87
144	Collingwood	Ontario	87
145	East Gwillimbury	Ontario	87
146	Essa	Ontario	87
147	Georgina	Ontario	87
148	Gravenhurst	Ontario	87
149	Huntsville	Ontario	87
150	Innisfil	Ontario	87
151	Midland	Ontario	87
152	Mono	Ontario	87
153	New Tecumseth	Ontario	87
154	Orillia	Ontario	87
155	Owen Sound	Ontario	87
156	Parry Sound	Ontario	87
157	Penetanguishene	Ontario	87
158	Shelburne	Ontario	87
159	The Blue Mountains	Ontario	87
160	Wasaga Beach	Ontario	87
161	Goderich	Ontario	85.1
162	Ingersoll	Ontario	85.1
163	London	Ontario	85.1
164	Petrolia	Ontario	85.1
165	Plympton-Wyoming	Ontario	85.1
166	St. Marys	Ontario	85.1
167	St. Thomas	Ontario	85.1
168	Tillsonburg	Ontario	85.1
169	Burlington	Ontario	84.9
170	Grimsby	Ontario	84.9
171	Haldimand County	Ontario	84.9
172	Hamilton	Ontario	84.9
173	Milton	Ontario	84.9
174	Oakville	Ontario	84.9
175	Dieppe	New Brunswick	81.4
176	Miramichi	New Brunswick	81.4
177	Moncton	New Brunswick	81.4
178	Riverview	New Brunswick	81.4
179	Sackville	New Brunswick	81.4
180	Shediac	New Brunswick	81.4
181	Cambridge	Ontario	66.5
182	Hanover	Ontario	66.5
183	Kitchener	Ontario	66.5
184	Stratford	Ontario	66.5
185	Waterloo	Ontario	66.5
186	Ajax	Ontario	63.4
187	Oshawa	Ontario	63.4
188	Pickering	Ontario	63.4
189	Whitby	Ontario	63.4
190	Abbotsford	British Columbia	61.4
191	Chilliwack	British Columbia	61.4
192	Langley	British Columbia	61.4
193	Maple Ridge	British Columbia	61.4
194	White Rock	British Columbia	61.4
195	Aurora	Ontario	59.7
196	Brampton	Ontario	59.7
197	Markham	Ontario	59.7
198	Mississauga	Ontario	59.7
199	Richmond Hill	Ontario	59.7
200	Toronto	Ontario	59.7
201	Vaughan	Ontario	59.7
202	Whitchurch-Stouffville	Ontario	59.7
203	Fort Erie	Ontario	57.3
204	Niagara Falls	Ontario	57.3
205	Niagara-on-the-Lake	Ontario	57.3
206	Pelham	Ontario	57.3
207	Port Colborne	Ontario	57.3
208	St. Catharines	Ontario	57.3
209	Thorold	Ontario	57.3
210	Welland	Ontario	57.3
211	Drummondville	Quebec	45.1
212	Shawinigan	Quebec	45.1
213	Sorel-Tracy	Quebec	45.1
214	Trois-Rivieres	Quebec	45.1
215	Victoriaville	Quebec	45.1
216	Colwood	British Columbia	40.5
217	Duncan	British Columbia	40.5
218	Langford	British Columbia	40.5
219	Sidney	British Columbia	40.5
220	Victoria	British Columbia	40.5
221	View Royal	British Columbia	40.5
222	Burnaby	British Columbia	35.4
223	Coquitlam	British Columbia	35.4
224	Delta	British Columbia	35.4
225	Ladysmith	British Columbia	35.4
226	Nanaimo	British Columbia	35.4
227	New Westminster	British Columbia	35.4
228	North Vancouver	British Columbia	35.4
229	Parksville	British Columbia	35.4
230	Pitt Meadows	British Columbia	35.4
231	Port Coquitlam	British Columbia	35.4
232	Port Moody	British Columbia	35.4
233	Powell River	British Columbia	35.4
234	Qualicum Beach	British Columbia	35.4
235	Richmond	British Columbia	35.4
236	Squamish	British Columbia	35.4
237	Surrey	British Columbia	35.4
238	Vancouver	British Columbia	35.4

All OpenStats Highest Indoor Radon editions · Cities