Federal contaminated sites in Quebec

Quebec has 2,535 sites in Canada's Federal Contaminated Sites Inventory — 10% of the 24,426 sites nationwide. 723 are active, 1,744 are closed, and 68 are suspected. Reported federal expenditure on these sites totals $492.5M (4.5% of the national total), an average of $194K per site.

Open these sites on the interactive map

Status and priority

Reported expenditure by fiscal year

Custodian departments in Quebec

Most common contaminant types

• Metal, metalloid, and organometallic1,193 · 47%
• PHCs (petroleum hydrocarbons)595 · 23%
• PAHs (polycyclic aromatic hydrocarbon)547 · 22%
• BTEXs (benzene, toluene, ethylbenzene, and xylene)89 · 3.5%
• Other inorganics61 · 2.4%
• Other organics53 · 2.1%
• Other Physical/Chemical (pH, temperature, dissolved solids, turbidity, etc.)47 · 1.9%
• Energetics46 · 1.8%
• PCBs (Polychlorinated Biphenyl) and PCDD/Fs (polychlorinated dibenzo-p-dioxin/dibenzofuran)37 · 1.5%
• Halogenated Hydrocarbon28 · 1.1%

Most affected media

• Soil1,202 · 47%
• Groundwater334 · 13%
• Surface soil313 · 12%
• Sediment145 · 5.7%
• Surface water112 · 4.4%
• Not Available63 · 2.5%
• Other medium60 · 2.4%
• Air3 · 0.1%

Largest sites by reported expenditure

Municipalities with the most sites

Montréal (196) · Saint-Gabriel-de-Valcartier (82) · Québec (77) · Les Îles-de-la-Madeleine (72) · Gatineau (71) · Saguenay (63) · Côte-Nord-du-Golfe-du-Saint-Laurent (62) · Gaspé (61) · Saint-Jean-sur-Richelieu (37) · Sept-Îles (37) · Rivière-Koksoak (34) · Bonne-Espérance (31) · Contrecoeur (31) · Kahnawake (30) · Havre-Saint-Pierre (29) · Trois-Rivières (27) · Lévis (26) · Longueuil (25) · Saint-Augustin (25) · Grosse-Île (24)

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.