Canada Radon
Atlas of Radon Levels

Ontario Radon Profiles

Indoor radon averages for 49 communities in Ontario. Provincial sample mean: 161 Bq/m³ · 22% of tested homes above 200 Bq/m³.

Ad · 728×90
49
Communities
Ontario
161 Bq/m³
Prov. avg radon
Sample mean
22%
Above 200 Bq/m³
Provincial sample avg
16
High / very high
Elevated risk category

All communities

49 cities in Ontario

Moderate

Barrie

129 Bq/m³ · 3% above 200

Explore →
High

Belleville - Quinte West

279 Bq/m³ · 49% above 200

Explore →
Moderate

Brampton

181 Bq/m³ · 31% above 200

Explore →
High

Brantford

266 Bq/m³ · 36% above 200

Explore →
Low

Brockville

57 Bq/m³ · 7% above 200

Explore →
High

Burlington

260 Bq/m³ · 30% above 200

Explore →
High

Cambridge

256 Bq/m³ · 46% above 200

Explore →
High

Centre Wellington

279 Bq/m³ · 34% above 200

Explore →
Moderate

Chatham-Kent

179 Bq/m³ · 24% above 200

Explore →
Low

Cobourg

91 Bq/m³ · 13% above 200

Explore →
Moderate

Collingwood

155 Bq/m³ · 15% above 200

Explore →
Low

Cornwall

80 Bq/m³ · 4% above 200

Explore →
Moderate

Elliot Lake

155 Bq/m³ · 20% above 200

Explore →
High

Essa

208 Bq/m³ · 43% above 200

Explore →
High

Guelph

219 Bq/m³ · 44% above 200

Explore →
Moderate

Hamilton

154 Bq/m³ · 34% above 200

Explore →
Moderate

Hawkesbury

171 Bq/m³ · 21% above 200

Explore →
Moderate

Ingersoll

171 Bq/m³ · 26% above 200

Explore →
Moderate

Kawartha Lakes

114 Bq/m³ · 4% above 200

Explore →
Low

Kenora

38 Bq/m³ · 8% above 200

Explore →
High

Kingston

265 Bq/m³ · 30% above 200

Explore →
Low

London

50 Bq/m³ · 10% above 200

Explore →
Low

Markham

79 Bq/m³ · 3% above 200

Explore →
Moderate

Midland

127 Bq/m³ · 11% above 200

Explore →
High

Mississauga

275 Bq/m³ · 20% above 200

Explore →
High

Norfolk

215 Bq/m³ · 25% above 200

Explore →
Moderate

North Bay

140 Bq/m³ · 4% above 200

Explore →
Moderate

Oakville

149 Bq/m³ · 13% above 200

Explore →
High

Orillia

206 Bq/m³ · 26% above 200

Explore →
Moderate

Oshawa

143 Bq/m³ · 7% above 200

Explore →
High

Ottawa

262 Bq/m³ · 17% above 200

Explore →
Moderate

Owen Sound

159 Bq/m³ · 49% above 200

Explore →
Low

Pembroke

33 Bq/m³ · 11% above 200

Explore →
High

Petawawa

218 Bq/m³ · 28% above 200

Explore →
Moderate

Peterborough

102 Bq/m³ · 2% above 200

Explore →
High

Port Hope

252 Bq/m³ · 22% above 200

Explore →
Low

Sarnia

62 Bq/m³ · 8% above 200

Explore →
Moderate

Sault Ste. Marie

157 Bq/m³ · 37% above 200

Explore →
Moderate

St. Catharines

182 Bq/m³ · 47% above 200

Explore →
Low

Stratford

85 Bq/m³ · 13% above 200

Explore →
High

Sudbury

268 Bq/m³ · 28% above 200

Explore →
High

Thunder Bay

227 Bq/m³ · 42% above 200

Explore →
Moderate

Tillsonburg

181 Bq/m³ · 26% above 200

Explore →
Moderate

Timmins

133 Bq/m³ · 11% above 200

Explore →
Moderate

Vaughan

106 Bq/m³ · 6% above 200

Explore →
Low

Wasaga Beach

44 Bq/m³ · 10% above 200

Explore →
Low

Waterloo

69 Bq/m³ · 13% above 200

Explore →
Moderate

Windsor

200 Bq/m³ · 40% above 200

Explore →
Low

Woodstock

55 Bq/m³ · 13% above 200

Explore →