Federal Contaminated SitesInventory Explorer

Sites by custodian department

Every site in the inventory has a federal custodian — the department, agency, or Crown corporation responsible for it. 31 custodians currently report sites; the largest portfolios belong to Fisheries and Oceans Canada, Indigenous Services Canada, and National Defence.

CustodianSitesActiveShareReported spend
Fisheries and Oceans Canada10,21346542%$252.3M
Indigenous Services Canada4,6831,22119%$887.0M
National Defence2,7501,17311%$1.55B
Environment and Climate Change Canada1,3531605.5%$93.8M
Royal Canadian Mounted Police1,033574.2%$28.4M
Crown-Indigenous Relations and Northern Affairs Canada (Northern Affairs Organization)1,0071534.1%$4.22B
Transport Canada9522143.9%$492.0M
Agriculture and Agri-Food Canada588352.4%$47.3M
Public Services and Procurement Canada5291082.2%$456.5M
Parks Canada Agency4881932.0%$116.7M
National Capital Commission2351001.0%$38.9M
Global Affairs Canada15080.6%$1.4M
Correctional Service Canada14760.6%$22.4M
Health Canada5800.2%$2.9M
Natural Resources Canada4490.2%$13.3M
Canada Border Services Agency4120.2%$11.9M
VIA Rail Canada32110.1%$19.7M
Canadian Food Inspection Agency2780.1%$933K
The Jacques-Cartier and Champlain Bridges Inc.22180.09%$97.8M
National Research Council Canada2220.09%$18.4M
Old Port of Montreal Corporation Inc. (Canada Lands Company)1600.07%$57K
Housing, Infrastructure and Communities Canada1270.05%$80K
Atomic Energy of Canada Limited860.03%$2.47B
Innovation, Science and Economic Development Canada530.02%$3.1M
Veterans Affairs Canada400.02%$514K
Windsor-Detroit Bridge Authority220.01%$6.6M
Canadian Museum of History100.00%$40K
Federal Bridge Corporation Limited100.00%$870K
Marine Atlantic100.00%$872K
The National Battlefields Commission110.00%$311K
Crown-Indigenous Relations and Northern Affairs Canada (Treaties and Aboriginal Government)110.00%$143K

Detailed pages for more provinces and custodians are being rolled out.

Figures are computed from the official FCSI open-data export published August 3, 2026, under the Open Government Licence – Canada. This is an unofficial site — verify against the official inventory before relying on details.