ProjectOtherGoes mixed

Stablex Cell 6 hazardous-waste landfill (Blainville)

A new hazardous-waste landfill cell of about 8 million cubic metres planned by Stablex, the subsidiary of a US company, at Blainville, Quebec, which would let it keep burying waste until about 2065. Quebec's Bill 93, adopted under closure in March 2025, transferred the land to the State for the project and exempted it from municipal, regional and Montreal-area zoning rules; a government decree then authorized the cell under conditions. Stablex treats industrial waste from Quebec, Ontario and the northeastern United States.

Status

Under construction

Direction

Mixed: Can go more than one way.

Capacity

8 million m3 disposal volume

Where

Quebec

Needs new laws?

Yes: part of the second wave, waiting on fast-track laws

Owners

• Stablex Canada (100%) as of 28 March 2025

Events

• 4 May 2026Citizen submission SEM-26-003 on hazardous-waste disposal at Blainville (Stablex) filed with the Commission for Environmental CooperationDocumentRegulationInternational1 source
• October 2025Radio-Canada Enquête: US waste was 17% of Stablex's 2024 inputs but about 50% of revenueStatementStatementQuebec2 sources
• 2 April 2025Quebec Superior Court refuses the injunction sought by Blainville and the CMM against Stablex Cell 6ActionCourt rulingQuebec1 source
• 28 March 2025Quebec adopts Bill 93 under closure, taking the Stablex landfill expansion site from Blainville and exempting it from city, regional county and Montreal-area zoning rulesActionLegislationQuebec6 sources
• 28 March 2025Quebec Decree 515-2025 authorizes Stablex Cell 6 with 24 conditionsActionPermitQuebec2 sources
• 26 March 2025The Montreal Metropolitan Community removes a 7.2-hectare parcel from its protected wetlands as an alternative site for StablexActionRegulationQuebec1 source
• 27 February 2025Quebec tables Bill 93 to transfer the Blainville property to the State for lease to StablexActionLegislationQuebec2 sources
• September 2023BAPE Report 371 finds the Stablex Cell 6 project premature and recommends against authorizing itDocumentOtherQuebec2 sources
• 23 August 2023Blainville cancels its agreement to sell Stablex 69 ha of city land for $14MActionOtherQuebec2 sources
• about November 2018US EPA (LCP Chemicals Superfund site, Linden NJ): Stablex is the only facility known to EPA that could take its visibly mercury-contaminated soilDocumentOtherUnited States1 source
• 26 August 2016US EPA final rule bans export of calomel and other mercury compounds from 2020-01-01, except to OECD countries for disposalActionRegulationUnited States1 source